Bump version to 1.5.0-dev in about.lua

* Add support for a get_keys() equivalent for lower than 5.7 Minetest versions

* Do not call the function itself to check if it exists

Co-authored-by: luk3yx <luk3yx@users.noreply.github.com>

* Do not call the function itself to check if it exists (2)

Co-authored-by: luk3yx <luk3yx@users.noreply.github.com>

* Fix an occurrence of get_keys() in is_uuid_existing()

---------

Co-authored-by: luk3yx <luk3yx@users.noreply.github.com>

.gitattributes

@@ -0,0 +1,5 @@
+mtt.lua export-ignore
+docker-compose.yml export-ignore
+*.spec.lua export-ignore
+test/* export-ignore
+screenshot_* export-ignore

.github/workflows/luacheck.yml

@@ -1,17 +1,10 @@
 name: luacheck
-
 on: [push, pull_request]
-
 jobs:
-  build:
-
+  luacheck:
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v1
-    - name: apt
-      run: sudo apt-get install -y luarocks
-    - name: luacheck install
-      run: luarocks install --local luacheck
-    - name: luacheck run
-      run: $HOME/.luarocks/bin/luacheck ./
+      - name: Checkout
+        uses: actions/checkout@master
+      - name: Luacheck
+        uses: lunarmodules/luacheck@master

.github/workflows/test.yml

@@ -9,9 +9,9 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        ENGINE_VERSION: [5.0.1, 5.1.1, 5.2.0, 5.3.0, 5.4.1, 5.5.1, 5.6.1, 5.7.0, latest]
+        ENGINE_VERSION: [5.0.1, 5.1.1, 5.2.0, 5.3.0, 5.4.1, 5.5.1, 5.6.1, 5.7.0, 5.8.0, 5.9.0, latest]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: test
-      run: docker-compose up --exit-code-from sut
+      run: docker compose up --exit-code-from sut

.gitignore

@@ -1,2 +1,4 @@
 i18n.py
+mod_translation_updater.py
 locale/*.tr.old
+*.patch

.luacheckrc

@@ -5,7 +5,8 @@ globals = {
 read_globals = {
 	-- Stdlib
 	string = {fields = {"split"}},
-	table = {fields = {"copy", "getn"}},
+	table = {fields = {"copy", "getn", "indexof", "insert_all"}},
+	beerchat = {fields = {"has_player_muted_player", "execute_callbacks"}},
 
 	-- Minetest
 	"minetest",
@@ -13,7 +14,7 @@ read_globals = {
 	"dump",
 
 	-- Deps
-	"unified_inventory", "default",
+	"unified_inventory", "default", "sfinv_buttons",
 
 	-- optional mods
 	"mtt", "canonical_name"

README.md

@@ -11,7 +11,8 @@ It adds a mail-system that allows players to send each other messages in-game an
 
 # Screenshot
 
-![](screenshot_1.1.0.png)
+![Main view](screenshot_1.4.0_1.png)
+![Message view](screenshot_1.4.0_2.png)
 
 # Installation
 
@@ -43,7 +44,8 @@ Mails can be deleted, marked as read or unread, replied to and forwarded to anot
 * Multiple selection (new in 1.1.0)
 * Settings
 * Chat, on join, HUD and sound notifications
-* Translated in : English, French, German, Chinese (both traditional and simplified), Spanish, Brazilian Portuguese.
+* Anti-spam detection
+* Translated in : English, French, German, Chinese (both traditional and simplified), Spanish, Brazilian Portuguese, Hungarian, Indonesian.
 
 # Compatibility / Migration
 
@@ -51,8 +53,10 @@ Overview:
 * `v1` all the data is in the `<worldfolder>/mails.db` file
 * `v2` every player has its own (in-) mailbox in the `<worldfolder>/mails/<playername>.json` file
 * `v3` every player has an entry in the `<playername>` `mod_storage/` (inbox, outbox, drafts, contacts, mailing lists, settings)
+* `v3.1` database fix after the message id mess
 
 # Dependencies
+
 * None
 
 # License
@@ -72,7 +76,7 @@ See the "LICENSE" file
 * fluxionary (Minor fixups)
 * Toby1710 (UX fixes)
 * Peter Nerlich (CC, BCC)
-* Emojigit (Traditional Chinese translation)
+* Emojigit (Performance, Traditional Chinese translation)
 * Niklp09 (German translation)
 * Dennis Jenkins (UX fixes)
 * Thomas Rudin (Maintenance)
@@ -83,6 +87,13 @@ See the "LICENSE" file
 * TheTrueBeginner (Simplified Chinese translation)
 * nyomi (Hungarian translation)
 * whosit (UI fixes)
+* Wuzzy (German translation)
+* savilli (UX fixes)
+* Panquesito7 (Maintenance)
+* Eredin (Spanish translation)
+* Muhammad Rifqi Priyo Susanto (Indonesian translation)
+* aBlueShadow (sfinv compatibility)
+* Singularis (UX and storage fixes)
 
 # Contribute
 

api.lua

@@ -1,7 +1,7 @@
 -- see: mail.md
 
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local f = string.format
 
@@ -10,9 +10,22 @@ function mail.register_on_receive(func)
 	mail.registered_on_receives[#mail.registered_on_receives + 1] = func
 end
 
+mail.registered_on_player_receives = {}
+function mail.register_on_player_receive(func)
+	table.insert(mail.registered_on_player_receives, func)
+end
+
+mail.registered_recipient_handlers = {}
+function mail.register_recipient_handler(func)
+	table.insert(mail.registered_recipient_handlers, func)
+end
+
 function mail.send(m)
 	if type(m.from) ~= "string" then return false, "'from' is not a string" end
-	if type(m.to) ~= "string" then return false, "'to' is not a string" end
+	if type(m.to or "") ~= "string" then return false, "'to' is not a string" end
+	if type(m.cc or "") ~= "string" then return false, "'cc' is not a string" end
+	if type(m.bcc or "") ~= "string" then return false, "'bcc' is not a string" end
+	if type(m.subject or "") ~= "string" then return false, "'subject' is not a string" end
 	if type(m.body) ~= "string" then return false, "'body' is not a string" end
 
 	-- defaults
@@ -21,23 +34,25 @@ function mail.send(m)
 	-- normalize to, cc and bcc while compiling a list of all recipients
 	local recipients = {}
 	local undeliverable = {}
-	m.to = mail.concat_player_list(mail.extractMaillists(m.to, m.from))
-	m.to = mail.normalize_players_and_add_recipients(m.to, recipients, undeliverable)
+	m.to = mail.concat_player_list(mail.extract_maillists(m.to, m.from))
+	m.to = mail.normalize_players_and_add_recipients(m.from, m.to, recipients, undeliverable)
 	if m.cc then
-		m.cc = mail.concat_player_list(mail.extractMaillists(m.cc, m.from))
-		m.cc = mail.normalize_players_and_add_recipients(m.cc, recipients, undeliverable)
+		m.cc = mail.concat_player_list(mail.extract_maillists(m.cc, m.from))
+		m.cc = mail.normalize_players_and_add_recipients(mail.from, m.cc, recipients, undeliverable)
 	end
 	if m.bcc then
-		m.bcc = mail.concat_player_list(mail.extractMaillists(m.bcc, m.from))
-		m.bcc = mail.normalize_players_and_add_recipients(m.bcc, recipients, undeliverable)
+		m.bcc = mail.concat_player_list(mail.extract_maillists(m.bcc, m.from))
+		m.bcc = mail.normalize_players_and_add_recipients(m.from, m.bcc, recipients, undeliverable)
 	end
 
 	if next(undeliverable) then -- table is not empty
-		local undeliverable_names = {}
-		for name in pairs(undeliverable) do
-			undeliverable_names[#undeliverable_names + 1] = '"' .. name .. '"'
+		local undeliverable_reason = {S("The mail could not be sent:")}
+		for _, reason in pairs(undeliverable) do
+			table.insert(undeliverable_reason, reason)
 		end
-		return false, f("recipients %s don't exist; cannot send mail.", table.concat(undeliverable_names, ", "))
+		return false, table.concat(undeliverable_reason, "\n")
+	elseif not next(recipients) then
+		return false, S("You did not specify any valid recipient.")
 	end
 
 	local extra = {}
@@ -80,34 +95,11 @@ function mail.send(m)
 	local entry = mail.get_storage_entry(m.from)
 	table.insert(entry.outbox, 1, msg)
 	mail.set_storage_entry(m.from, entry)
+	msg.spam = #mail.check_spam(msg) >= 1
 
 	-- add in every receivers inbox
-	for recipient in pairs(recipients) do
-		entry = mail.get_storage_entry(recipient)
-		table.insert(entry.inbox, msg)
-		mail.set_storage_entry(recipient, entry)
-	end
-
-	-- notify recipients that happen to be online
-	local mail_alert = S("You have a new message from @1! Subject: @2",  m.from, m.subject) ..
-	"\n" .. S("To view it, type /mail")
-	local unified_inventory_alert = S("You could also use the button in your inventory.")
-	for _, player in ipairs(minetest.get_connected_players()) do
-		local name = player:get_player_name()
-		if recipients[name] then
-			if mail.get_setting(name, "chat_notifications") == true then
-				minetest.chat_send_player(name, mail_alert)
-				if minetest.get_modpath("unified_inventory") then
-					minetest.chat_send_player(name, unified_inventory_alert)
-				end
-			end
-			if mail.get_setting(name, "sound_notifications") == true then
-				minetest.sound_play("mail_notif", {to_player=name})
-			end
-			local receiver_entry = mail.get_storage_entry(name)
-			local receiver_messages = receiver_entry.inbox
-			mail.hud_update(name, receiver_messages)
-		end
+	for _, deliver in pairs(recipients) do
+		deliver(msg)
 	end
 
 	for i=1, #mail.registered_on_receives do
@@ -121,7 +113,10 @@ end
 
 function mail.save_draft(m)
 	if type(m.from) ~= "string" then return false, "'from' is not a string" end
-	if type(m.to) ~= "string" then return false, "'to' is not a string" end
+	if type(m.to or "") ~= "string" then return false, "'to' is not a string" end
+	if type(m.cc or "") ~= "string" then return false, "'cc' is not a string" end
+	if type(m.bcc or "") ~= "string" then return false, "'bcc' is not a string" end
+	if type(m.subject or "") ~= "string" then return false, "'subject' is not a string" end
 	if type(m.body) ~= "string" then return false, "'body' is not a string" end
 
 	-- defaults

api.md

@@ -1,4 +1,3 @@
-
 # Mail format
 The mail format in the api hooks
 
@@ -34,7 +33,7 @@ local success, error = mail.send({
 ```
 
 # Hooks
-On-receive mail hook:
+Generic on-receive mail hook:
 
 ```lua
 mail.register_on_receive(function(m)
@@ -42,11 +41,35 @@ mail.register_on_receive(function(m)
 end)
 ```
 
+Player-specific on-receive mail hook:
+```lua
+mail.register_on_player_receive(function(player, msg)
+    -- "player" is the name of a recipient; "msg" is a mail object (see "Mail format")
+end)
+```
+
+# Recipient handler
+Recipient handlers are registered using
+
+```lua
+mail.register_recipient_handler(function(sender, name)
+end)
+```
+
+where `name` is the name of a single recipient.
+
+The recipient handler should return
+* `nil` if the handler does not handle messages sent to the particular recipient,
+* `true, player` (where `player` is a string or a list of strings) if the mail should be redirected to `player`,
+* `true, deliver` if the mail should be delivered by calling `deliver` with the message, or
+* `false, reason` (where `reason` is optional or, if provided, a string) if the recipient explicitly rejects the mail.
+
 # Internals
 
 mod-storage entry for a player (indexed by playername and serialized with json):
 ```lua
 {
+
 	contacts = {
 		{
 			-- name of the player (unique key in the list)
@@ -76,7 +99,9 @@ mod-storage entry for a player (indexed by playername and serialized with json):
 			-- timestamp (os.time())
 			time = 1234,
 			-- read-flag (true: player has read the mail, inbox only)
-			read = true
+			read = true,
+                        -- spam-flag (true: that mail is noted as a spam)
+                        spam = false
 		},{
 			...
 		}
@@ -84,6 +109,12 @@ mod-storage entry for a player (indexed by playername and serialized with json):
 	outbox = {
 		-- same format as "inbox"
 	},
+	drafts = {
+		-- same format as "inbox"
+	},
+	trash = {
+		-- same format as "inbox"
+	},
 	lists = {
 		{
 			-- name of the maillist (unique key in the list)
@@ -93,5 +124,10 @@ mod-storage entry for a player (indexed by playername and serialized with json):
 			-- playername list
 			players = {"playername", "playername2"}
 		}
+	},
+	settings = {
+		setting1 = "value",
+		setting2 = true,
+		setting3 = 123
 	}
 }

api.spec.lua

@@ -1,12 +1,76 @@
-mtt.register("send mail", function(callback)
-    -- send a mail
-    local success, err = mail.send({from = "player1", to = "player2", subject = "something", body = "blah"})
-    assert(success)
-    assert(not err)
+mail.register_recipient_handler(function(_, name)
+    if name:sub(1, 6) == "alias/" then
+        return true, name:sub(7)
+    elseif name == "list/test" then
+        return true, {"alias/player1", "alias/player2"}
+    elseif name == "list/reject" then
+        return false, "It works (?)"
+    end
+end)
+mail.update_maillist("player1", {
+	owner = "player1",
+	name = "recursive",
+	desc = "",
+	players = {"@recursive", "player1"},
+}, "recursive")
+
+local received_count = {}
+mail.register_on_player_receive(function(player)
+	received_count[player] = (received_count[player] or 0) + 1
+end)
+
+local sent_count = 0
+mail.register_on_receive(function()
+	sent_count = sent_count+1
+end)
+
+local function assert_inbox_count(player_name, count)
+    local entry = mail.get_storage_entry(player_name)
+    assert(entry, player_name .. " has no mail entry")
+    local actual_count = #entry.inbox
+    assert(actual_count == count, ("incorrect mail count: %d expected, got %d"):format(count, actual_count))
+    local player_received = received_count[player_name] or 0
+    assert(player_received == count, ("incorrect receive count: %d expected, got %d"):format(count, player_received))
+end
+
+local function assert_send(expected_success, ...)
+	local success, err = mail.send(...)
+	if expected_success then
+		assert(success, ("expected mail to be sent, got error message: %s"):format(err))
+		assert(not err, ("unexpected message after sending mail: %s"):format(err))
+	else
+		assert(not success, "expected mail to be rejected, mail was sent")
+		assert(type(err) == "string", ("expected error message, got datum of type %s"):format(type(err)))
+	end
+end
+
+mtt.register("send mail", function(callback)
+    -- local maillists
+    assert_send(true, {from = "player1", to = "@recursive", subject = "hello recursion", body = "blah"})
+    assert_inbox_count("player1", 1)
+    assert(sent_count == 1)
+
+    -- do not allow empty recipients
+    assert_send(false, {from = "player1", to = "@doesnotexist", subject = "should not be sent", body = "blah"})
+    assert(sent_count == 1)
+
+    -- send a mail to a list
+    assert_send(true, {from = "player1", to = "list/test", subject = "something", body = "blah"})
+    assert_inbox_count("player2", 1)
+    assert_inbox_count("player1", 1)
+    assert(sent_count == 2)
+
+    -- send a second mail to the list and also the sender
+    assert_send(true, {from = "player1", to = "list/test, alias/player1", subject = "something", body = "blah"})
+    assert_inbox_count("player2", 2)
+    assert_inbox_count("player1", 2)
+    assert(sent_count == 3)
+
+    -- send a mail to list/reject - the mail should be rejected
+    assert_send(false, {from = "player1", to = "list/reject", subject = "something", body = "NO"})
+    assert_inbox_count("player2", 2)
+    assert_inbox_count("player1", 2)
+    assert(sent_count == 3)
 
-    -- check the receivers inbox
-    local entry = mail.get_storage_entry("player2")
-    assert(entry)
-    assert(#entry.inbox > 0)
     callback()
 end)

docker-compose.yml

@@ -1,4 +1,4 @@
-version: "3.6"
+version: "4.1"
 
 services:
  sut:

gui.lua

@@ -10,3 +10,13 @@ if minetest.get_modpath("unified_inventory") then
 			end
 		})
 end
+
+if minetest.get_modpath("sfinv_buttons") then
+	sfinv_buttons.register_button("mail", {
+			title = "Mail",
+			image = "mail_button.png",
+			action = function(player)
+				mail.show_mail_menu(player:get_player_name())
+			end
+		})
+end

init.lua

@@ -5,6 +5,9 @@ mail = {
 	-- mod storage
 	storage = minetest.get_mod_storage(),
 
+	-- translation
+	S = minetest.get_translator(minetest.get_current_modname()),
+
 	-- ui theme prepend
 	theme = "",
 
@@ -17,6 +20,7 @@ mail = {
 		outbox = {},
 		drafts = {},
 		trash = {},
+		message = {},
 		contacts = {},
 		maillists = {},
 		to = {},
@@ -28,13 +32,8 @@ mail = {
 		filter = {},
 		multipleselection = {},
 		optionstab = {},
-		chat_notifications = {},
-		onjoin_notifications = {},
-		hud_notifications = {},
-		sound_notifications = {},
-		unreadcolorenable = {},
-		cccolorenable = {},
-		trash_move_enable = {}
+		settings_group = {},
+		contributor_grouping = {},
 	},
 
 	message_drafts = {}
@@ -46,9 +45,7 @@ end
 
 -- sub files
 local MP = minetest.get_modpath(minetest.get_current_modname())
-dofile(MP .. "/util/normalize.lua")
-dofile(MP .. "/util/contact.lua")
-dofile(MP .. "/util/uuid.lua")
+dofile(MP .. "/util/init.lua")
 dofile(MP .. "/chatcommands.lua")
 dofile(MP .. "/migrate.lua")
 dofile(MP .. "/hud.lua")
@@ -56,22 +53,9 @@ dofile(MP .. "/storage.lua")
 dofile(MP .. "/api.lua")
 dofile(MP .. "/gui.lua")
 dofile(MP .. "/onjoin.lua")
-dofile(MP .. "/ui/mail.lua")
-dofile(MP .. "/ui/inbox.lua")
-dofile(MP .. "/ui/outbox.lua")
-dofile(MP .. "/ui/drafts.lua")
-dofile(MP .. "/ui/trash.lua")
-dofile(MP .. "/ui/message.lua")
-dofile(MP .. "/ui/events.lua")
-dofile(MP .. "/ui/contacts.lua")
-dofile(MP .. "/ui/edit_contact.lua")
-dofile(MP .. "/ui/select_contact.lua")
-dofile(MP .. "/ui/maillists.lua")
-dofile(MP .. "/ui/edit_maillists.lua")
-dofile(MP .. "/ui/compose.lua")
-dofile(MP .. "/ui/options.lua")
-dofile(MP .. "/ui/settings.lua")
-dofile(MP .. "/ui/about.lua")
+dofile(MP .. "/player_recipients.lua")
+-- sub directories
+dofile(MP .. "/ui/init.lua")
 
 -- migrate storage
 mail.migrate()

locale/mail.de.tr

@@ -1,81 +1,123 @@
 # textdomain: mail
-Provided my mt-mods=
-Version=
-Licenses=
-Expat (code), WTFPL (textures)=
-Communication using this system is NOT guaranteed to be private!=
-Admins are able to view the messages of any player.=
-Contributors=
-Settings=
+The mail could not be sent:=Die Mail konnte nicht gesendet werden:
+You did not specify any valid recipient.=Sie haben keinen gültigen Empfänger angegeben.
+You have mail! Type /mail to read=Sie haben Post! „/mail“ zum Lesen eingeben
+You have a new message from @1! Subject: @2=Sie haben eine neue Nachricht von @1! Betreff: @2
+To view it, type /mail=Geben Sie zum Anzeigen „/mail“ ein
+You could also use the button in your inventory.=Sie können auch die Schaltfläche in Ihrem Inventar verwenden.
+Original author=Ursprünglicher Autor
+Code=Code
+Internationalization=Internationalisierung
+Textures=Texturen
+Audio=Audio
+Provided by mt-mods=Bereitgestellt von mt-mods
+Version: @1=Version: @1
+Licenses=Lizenzen
+Expat (code), WTFPL (textures)=Expat (Code), WTFPL (Texturen)
+Communication using this system is NOT guaranteed to be private!=Die Kommunikation über dieses System ist NICHT garantiert privat!
+Admins are able to view the messages of any player.=Admins können die Nachrichten aller Spielenden sehen.
+Contributors=Mitwirkende
+Group by name=Nach Name gruppieren
+Group by contribution=Nach Beitrag gruppieren
+Note=Anmerkung
+Settings=Einstellungen
 About=Über
-You have a new message from @1! Subject: @2=
-To view it, type /mail=
-You could also use the button in your inventory.=
 BCC=BCC
 Cancel=Abbrechen
-Save draft=Entwurf Speichern
+Save draft=Entwurf speichern
 Send=Senden
+Subject=Betreff
+To=An
+CC=CC
+Delete=Löschen
+New=Neu
+Edit=Bearbeiten
+Back=Zurück
 Name=Name
 No drafts=Keine Entwürfe
-Edit=Bearbeiten
-Trash=
+Trash=Papierkorb
 Inbox=Posteingang
-Outbox=Senden
+Outbox=Gesendet
 Drafts=Entwürfe
 Contacts=Kontakte
 Mail lists=Verteilerlisten
-Options=
+Options=Einstellungen
 Close=Schließen
 (No subject)=(Kein Betreff)
 Player name=Spielername
-That name is already in your contacts=
-The contact name cannot be empty.=
+That name is already in your contacts=Dieser Name ist bereits in Ihren Kontakten
+The contact name cannot be empty.=Der Kontaktname kann nicht leer sein.
+Save=Speichern
 Maillist name=Verteilerlistenname
 Desc=Beschreibung
 Players=Spieler
-That name is already in your mailing lists.=
-The mailing list name cannot be empty.=
-Save=Speichern
+That name is already in your mailing lists.=Dieser Name ist bereits in Ihren Verteilerlisten.
+The mailing list name cannot be empty.=Der Verteilerlistenname kann nicht leer sein.
 Mark Read=Als gelesen makieren
 Mark Unread=Als ungelesen makieren
-New=Neu
-(No description)=(Keine Beschreibung)
-No maillist=Keine Verteilerliste
-From=Von
-Delete=Löschen
-Subject=Betreff
-CC=CC
-To=An
-You have mail! Type /mail to read=
-Filter=
-Allow multiple selection=
-@1 of @2 selected=
-(Un)select all=
-No mail=Keine Nachrichten
-Date=Datum
-Ascending=
-Descending=
-Read=Lesen
+Mark Spam=Als Spam markieren
+Unmark Spam=Kein Spam
 Reply=Antworten
 Reply all=Allen antworten
-Forward=Weiter
+Forward=Weiterleiten
+Reply only to the sender=Nur dem Absender antworten
+Reply to all involved people=Allen beteiligten Personen antworten
+Transfer message to other people=Nachricht an andere Personen weiterleiten
+Date=Datum
+From=Von
+Filter=Filter
+Allow multiple selection=Mehrfachauswahl zulassen
+@1 of @2 selected=@1 von @2 ausgewählt
+(Un)select all=Alle aus-/abwählen
+No mail=Keine Nachrichten
+Read=Lesen
+Ascending=Aufsteigend
+Descending=Absteigend
+(No description)=(Keine Beschreibung)
+No maillist=Keine Verteilerliste
+Receivers=Empfänger
+(Un)mute sender=Absender stummschalten/entstummen
 Add=Hinzufügen
 Remove=Entfernen
-Note=Notiz
-Back=Zurück
-Notifications=
-Chat notifications=
-On join notifications=
-HUD notifications=
-Sound notifications=
-Message list=
-Show unread in different color=
-Show CC/BCC in different color=
-Default sorting fields=
-Other=
-Move deleted messages to trash=
-Reset=
+Reset=Zurücksetzen
+Restore=Wiederherstellen
+Empty=Leer
+Trash is empty=Papierkorb ist leer
 From/To=Von/An
-Restore=
-Empty=
-Trash is empty=
+No contacts=Keine Kontakte
+The method of delivery to @1 is invalid.=Die Zustellmethode an @1 ist ungültig.
+The recipient @1 could not be identified.=Der Empfänger @1 konnte nicht identifiziert werden.
+@1 rejected your mail.=@1 hat Ihre Mail abgewiesen.
+Chat notifications=Chat-Benachrichtigungen
+Receive a message in the chat when there is a new message=Eine Nachricht im Chat erhalten, wenn es eine neue Mail gibt
+On join notifications=Login-Benachrichtigungen
+Receive a message at login when inbox isn't empty=Bei der Anmeldung eine Nachricht erhalten, wenn der Posteingang nicht leer ist
+HUD notifications=HUD-Benachrichtigungen
+Show an HUD notification when inbox isn't empty=Eine HUD-Benachrichtigung anzeigen, wenn der Posteingang nicht leer ist
+Sound notifications=Klang-Benachrichtigungen
+Play a sound when there is a new message=Einen Ton abspielen, wenn eine neue Mail eingeht
+Show unread in different color=Ungelesenes in anderer Farbe anzeigen
+Show CC/BCC in different color=CC/BCC in anderer Farbe anzeigen
+Default sorting field=Standardsortierfeld
+Default sorting direction=Standardmäßige Sortierrichtung
+Move deleted messages to trash=Gelöschte Nachrichten in den Papierkorb verschieben
+Automatic marking read=Automatisch als gelesen markieren
+Mark a message as read when opened=Nachrichten beim Öffnen als gelesen markieren
+Date format=Datumsformat
+Timezone offset=Zeitverschiebung
+Offset to add to server time.=Verschiebung, die zur Serverzeit addiert wird.
+Mute list=Stummgeschaltet-Liste
+Notifications=Benachrichtigungen
+Message list=Nachrichtenliste
+Fields=Felder
+Spam=Spam
+Other=Anderes
+Date and Time=Datum und Uhrzeit
+years=Jahren
+months=Monaten
+weeks=Wochen
+days=Tagen
+hours=Stunden
+minuts=Minuten
+seconds=Sekunden
+@1 ago=Vor @1

locale/mail.es.tr

@@ -1,81 +1,128 @@
 # textdomain: mail
-Provided my mt-mods=
-Version=
-Licenses=
-Expat (code), WTFPL (textures)=
-Communication using this system is NOT guaranteed to be private!=
-Admins are able to view the messages of any player.=
-Contributors=
-Settings=
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=¡Tienes correo! Escribe /mail para leerlo
+You have a new message from @1! Subject: @2=¡Tienes un nuevo mensaje de @1! Asunto: @2
+To view it, type /mail=Para verlo, escribe /mail
+You could also use the button in your inventory.=También puedes usar el botón de tu inventario.
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=Proporcionado por mt-mods
+Version: @1=
+Licenses=Licencias
+Expat (code), WTFPL (textures)=Expat (código), WTFPL (texturas)
+Communication using this system is NOT guaranteed to be private!=¡NO se garantiza que la comunicación mediante este sistema sea privada!
+Admins are able to view the messages of any player.=Los administradores pueden ver los mensajes de cualquier jugador.
+Contributors=Colaboradores
+Group by name=
+Group by contribution=
+Note=Nota
+Settings=Ajustes
 About=Acerca de
-You have a new message from @1! Subject: @2=
-To view it, type /mail=
-You could also use the button in your inventory.=
 BCC=CCO
 Cancel=Cancelar
 Save draft=Guardar borrador
 Send=Enviar
+Subject=Asunto
+To=Para
+CC=CC
+Delete=Borrar
+New=Nuevo
+Edit=Editar
+Back=Volver
 Name=Nombre
 No drafts=No hay borradores
-Edit=Editar
-Trash=
+Trash=Papelera
 Inbox=Entrada
 Outbox=Enviados
 Drafts=Borradores
 Contacts=Contactos
 Mail lists=Listas de correo
-Options=
+Options=Opciones
 Close=Cerrar
 (No subject)=(Sin asunto)
 Player name=Nombre del jugador
 That name is already in your contacts=Ese nombre ya está en tus contactos
-The contact name cannot be empty.=Ese nombre de contacto no puede estar vacío.
+The contact name cannot be empty.=El nombre de contacto no puede estar vacío.
+Save=Guardar
 Maillist name=Nombre de la lista de correo
 Desc=Desc
 Players=Jugadores
-That name is already in your mailing lists.=Ese nombre ya está entus listas de correo.
-The mailing list name cannot be empty.=Ese nombre de lista de correo no puede estar vacío.
-Save=Guardar
+That name is already in your mailing lists.=Ese nombre ya está en tus listas de correo.
+The mailing list name cannot be empty.=El nombre de lista de correo no puede estar vacío.
 Mark Read=Marcar como leído
 Mark Unread=Marcar como no leído
-New=Nuevo
-(No description)=(Sin descripción)
-No maillist=Sin lista de correo
-From=De
-Delete=Borrar
-Subject=Asunto
-CC=CC
-To=Para
-You have mail! Type /mail to read=
-Filter=Filtrar
-Allow multiple selection=Permitir selección múltiple
-@1 of @2 selected=
-(Un)select all=(Des)seleccionar todos
-No mail=Sin correo
-Date=Fecha
-Ascending=Ascendente
-Descending=Descendiente
-Read=Leído
+Mark Spam=
+Unmark Spam=
 Reply=Responder
 Reply all=Responder a todos
 Forward=Reenviar
+Reply only to the sender=Responder solo al remitente
+Reply to all involved people=Responder a todas las personas implicadas
+Transfer message to other people=Transferir el mensaje a otras personas
+Date=Fecha
+From=De
+Filter=Filtro
+Allow multiple selection=Permitir selección múltiple
+@1 of @2 selected=@1 de @2 seleccionado(s)
+(Un)select all=(Des)seleccionar todos
+No mail=Sin correo
+Read=Leer
+Ascending=Ascendente
+Descending=Descendente
+(No description)=(Sin descripción)
+No maillist=Sin lista de correo
+Receivers=Recipientes
+(Un)mute sender=
 Add=Añadir
 Remove=Quitar
-Note=Nota
-Back=Volver
-Notifications=
-Chat notifications=
-On join notifications=
-HUD notifications=
-Sound notifications=
-Message list=
-Show unread in different color=
-Show CC/BCC in different color=
-Default sorting fields=
-Other=
-Move deleted messages to trash=
-Reset=
+Reset=Restablecer
+Restore=Restaurar
+Empty=Vacío
+Trash is empty=La papelera está vacía
 From/To=De/Para
-Restore=
-Empty=
-Trash is empty=
+No contacts=Sin contactos
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=Notificaciones de chat
+Receive a message in the chat when there is a new message=Recibir un mensaje en el chat cuando hay correo nuevo
+On join notifications=Notificaciones al unirse
+Receive a message at login when inbox isn't empty=Recibir mensaje al conectarse si la bandeja de entrada no está vacía
+HUD notifications=Notificaciones de interfaz
+Show an HUD notification when inbox isn't empty=Mostrar una notificación en la interfaz cuando la bandeja de entrada no está vacía
+Sound notifications=Notificaciones de sonido
+Play a sound when there is a new message=Emitir un sonido cuando hay un correo nuevo
+Show unread in different color=Mostrar no-leídos en diferente color
+Show CC/BCC in different color=Mostrar CC/CCO en diferente color
+Default sorting field=Campo a ordenar por defecto
+Default sorting direction=
+Move deleted messages to trash=Mover mensajes borrados a la papelera
+Automatic marking read=Marcar como leído automáticamente
+Mark a message as read when opened=Marcar un mensaje como leído al abrirlo
+Date format=Formato de fecha
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=Notificaciones
+Message list=Lista de mensajes
+Fields=
+Spam=
+Other=Otros
+Date and Time=
+years=años
+months=meses
+weeks=semanas
+days=días
+hours=horas
+minuts=minutos
+seconds=segundos
+@1 ago=hace @1
+
+
+##### not used anymore #####
+
+Version=Versión

locale/mail.fr.tr

@@ -1,23 +1,40 @@
 # textdomain: mail
-Provided my mt-mods=Fourni par mt-mods
-Version=Version
+The mail could not be sent:=Le mail ne peut pas être envoyé :
+You did not specify any valid recipient.=Vous n'avez pas spécifié de destinataire valide.
+You have mail! Type /mail to read=Vous avez reçu un mail ! Entrez /mail pour le consulter
+You have a new message from @1! Subject: @2=Vous avez un nouveau message de @1 ! Objet : @2
+To view it, type /mail=Pour le consulter, entrez /mail
+You could also use the button in your inventory.=Vous pouvez également utiliser le bouton dans votre inventaire
+Original author=Auteur original
+Code=Code
+Internationalization=Traduction
+Textures=Textures
+Audio=Audio
+Provided by mt-mods=Fourni par mt-mods
+Version: @1=Version : @1
 Licenses=Licences
 Expat (code), WTFPL (textures)=Expat (code), WTFPL (textures)
 Communication using this system is NOT guaranteed to be private!=La communication par ce système n'est pas garantie d'être privée !
 Admins are able to view the messages of any player.=Les administrateurs peuvent voir les messages de chaque joueur.
 Contributors=Contributeurs
+Group by name=Grouper par nom
+Group by contribution=Grouper par contribution
+Note=Note
 Settings=Paramètres
 About=À propos
-You have a new message from @1! Subject: @2=Vous avez un nouveau message de @1 ! Objet : @2
-To view it, type /mail=Pour le consulter, entrez /mail
-You could also use the button in your inventory.=Vous pouvez également utiliser le bouton dans votre inventaire
 BCC=Cci
 Cancel=Annuler
 Save draft=Enregistrer le brouillon
 Send=Envoyer
-Name=Nom
-No drafts=Pas de brouillons
+Subject=Objet
+To=À
+CC=Cc
+Delete=Supprimer
+New=Nouveau
 Edit=Modifier
+Back=Retour
+Name=Nom
+No drafts=Aucun brouillon
 Trash=Corbeille
 Inbox=Boîte de réception
 Outbox=Envoyés
@@ -30,52 +47,77 @@ Close=Fermer
 Player name=Nom du joueur
 That name is already in your contacts=Ce nom est déjà dans vos contacts
 The contact name cannot be empty.=Le nom du contact ne peut pas être vide.
+Save=Sauvegarder
 Maillist name=Nom de la liste de diffusion
 Desc=Desc
 Players=Joueurs
-That name is already in your mailing lists.=Ce nom est déjà dans vos listes de diffusion.
+That name is already in your mailing lists.=Ce nom est déjà présent dans vos listes de diffusion.
 The mailing list name cannot be empty.=Le nom de la liste de diffusion ne peut pas être vide.
-Save=Sauvegarder
 Mark Read=Marquer comme lu
 Mark Unread=Marquer non lu
-New=Nouveau
-(No description)=Sans description
-No maillist=Aucune liste de diffusion
-From=De
-Delete=Supprimer
-Subject=Objet
-CC=Cc
-To=À
-You have mail! Type /mail to read=Vous avez reçu un mail ! Entrez /mail pour le consulter
-Filter=Filtre
-Allow multiple selection=Autoriser la sélection multiple
-@1 of @2 selected=@1 sur @2 sélectionnés
-(Un)select all=Tout (dé)selectionner
-No mail=Aucun mail
-Date=Date
-Ascending=Croissant
-Descending=Décroissant
-Read=Lire
+Mark Spam=Marquer comme spam
+Unmark Spam=Marquer non-spam
 Reply=Répondre
 Reply all=Répondre à tous
 Forward=Transférer
+Reply only to the sender=Répondre uniquement à l'expéditeur
+Reply to all involved people=Répondre à toutes les personnes concernées
+Transfer message to other people=Transférer le message à d'autres personnes
+Date=Date
+From=De
+Filter=Filtre
+Allow multiple selection=Autoriser la sélection multiple
+@1 of @2 selected=@1 sur @2 sélectionnés
+(Un)select all=Tout (dé)sélectionner
+No mail=Aucun mail
+Read=Lire
+Ascending=Croissant
+Descending=Décroissant
+(No description)=(Sans description)
+No maillist=Aucune liste de diffusion
+Receivers=Destinataires
+(Un)mute sender=(Dé)mettre en sourdine
 Add=Ajouter
 Remove=Enlever
-Note=Note
-Back=Retour
-Notifications=Notifications
-Chat notifications=Notifications dans le tchat
-On join notifications=Notifications à la connexion
-HUD notifications=Notifications ATH
-Sound notifications=Notifications sonores
-Message list=Liste de messages
-Show unread in different color=Coloriser les non lus
-Show CC/BCC in different color=Coloriser les Cc/Cci
-Default sorting fields=Champs de tri par défaut
-Other=Autre
-Move deleted messages to trash=Supprimer les messages dans la corbeille
 Reset=Réinitialiser
-From/To=De/À
 Restore=Restaurer
 Empty=Vider
 Trash is empty=La corbeille est vide
+From/To=De/À
+No contacts=Aucun contact
+The method of delivery to @1 is invalid.=La méthode d'expédition à @1 est invalide.
+The recipient @1 could not be identified.=Le destinataire @1 n'a pas pu être identifié.
+@1 rejected your mail.=@1 a rejeté votre mail.
+Chat notifications=Notifications dans le tchat
+Receive a message in the chat when there is a new message=Recevoir un message dans le tchat lorsqu'un nouveau message est reçu
+On join notifications=Notifications à la connexion
+Receive a message at login when inbox isn't empty=Recevoir un message à la connexion lorsque la boîte de réception n'est pas vide
+HUD notifications=Notifications ATH
+Show an HUD notification when inbox isn't empty=Indiquer dans l'ATH que la boîte de réception n'est pas vide
+Sound notifications=Notifications sonores
+Play a sound when there is a new message=Jouer un son lorsqu'un nouveau message est reçu
+Show unread in different color=Coloriser les non lus
+Show CC/BCC in different color=Coloriser les Cc/Cci
+Default sorting field=Champ de tri par défaut
+Default sorting direction=Direction de tri par défaut
+Move deleted messages to trash=Supprimer les messages dans la corbeille
+Automatic marking read=Lu automatique
+Mark a message as read when opened=Marquer un message comme lu lorsqu'il est ouvert
+Date format=Format de la date
+Timezone offset=Compensation horaire
+Offset to add to server time.=Écart de temps à ajouter à l'heure du serveur.
+Mute list=Liste de sourdine
+Notifications=Notifications
+Message list=Liste de messages
+Fields=Champs
+Spam=Spam
+Other=Autre
+Date and Time=Date et Heure
+years=années
+months=mois
+weeks=semaines
+days=jours
+hours=heures
+minuts=minutes
+seconds=secondes
+@1 ago=Il y a @1

locale/mail.hu.tr

@@ -1,23 +1,40 @@
 # textdomain: mail
-Provided my mt-mods=Feltéve, hogy az én mt-mod-om
-Version=Verzió
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=Van egy leveled! Írd /mail az olvasáshoz
+You have a new message from @1! Subject: @2=Van egy új üzeneted @1-től Cím: @2
+To view it, type /mail=Ahhoz hogy megnézd, írd /mail
+You could also use the button in your inventory.=A gombot is tudod használni az inventoridban.
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=Feltéve, hogy az én mt-mod-om
+Version: @1=
 Licenses=License
 Expat (code), WTFPL (textures)=Expat (kód), WTFPL (textúrák)
 Communication using this system is NOT guaranteed to be private!=A systemben lévő komunikáció nem garantáltan privát!
 Admins are able to view the messages of any player.=Az adminok megtudják nézni minden játékos üzenetjét.
 Contributors=Közreműködöttek
+Group by name=
+Group by contribution=
+Note=Jegyzet
 Settings=Beállítások
 About=Róla
-You have a new message from @1! Subject: @2=Van egy új üzeneted @1-től Cím: @2
-To view it, type /mail=Ahhoz hogy megnézd, írd /mail
-You could also use the button in your inventory.=A gombot is tudod használni az inventoridban.
 BCC=BCC
 Cancel=Mégse
 Save draft=mentés piszkozatként
 Send=Küldés
+Subject=Cím
+To=Neki
+CC=CC
+Delete=Törlés
+New=Új
+Edit=Szerkesztés
+Back=Visza
 Name=Név
 No drafts=Nincsenek piszkozatok
-Edit=Szerkesztés
 Trash=
 Inbox=PostaLáda
 Outbox=Elküldött
@@ -30,52 +47,82 @@ Close=Bezár
 Player name=Játékos neve
 That name is already in your contacts=A név már a kontaktok között van
 The contact name cannot be empty.=A contakt neve nem lehet üres.
+Save=Mentés
 Maillist name=Levelező lista neve
 Desc=Desc
 Players=Játékosok
 That name is already in your mailing lists.=A név már benne van a levelező listában
 The mailing list name cannot be empty.=A levelező lista neve nem lehet üres
-Save=Mentés
 Mark Read=Jelöld olvasottként
 Mark Unread=Jelöld olvasatlanul
-New=Új
-(No description)=(Nincs leírás)
-No maillist=Nincs levelező lista
+Mark Spam=
+Unmark Spam=
+Reply=Válasz
+Reply all=Válaszmindenkinek
+Forward=Továbbítás
+Reply only to the sender=
+Reply to all involved people=
+Transfer message to other people=
+Date=Dátum
 From=Tőle
-Delete=Törlés
-Subject=Cím
-CC=CC
-To=Neki
-You have mail! Type /mail to read=Van egy leveled! Írd /mail az olvasáshoz
 Filter=Filterek
 Allow multiple selection=
 @1 of @2 selected=
 (Un)select all=(ne válaszd ki) mindegyik választása
 No mail=Nincs levél
-Date=Dátum
+Read=Olvasott
 Ascending=Emelkedő
 Descending=Sűlyedő
-Read=Olvasott
-Reply=Válasz
-Reply all=Válaszmindenkinek
-Forward=Továbbítás
+(No description)=(Nincs leírás)
+No maillist=Nincs levelező lista
+Receivers=
+(Un)mute sender=
 Add=Hozzáadás
 Remove=Elvétel
-Note=Jegyzet
-Back=Visza
-Notifications=Értesítések
-Chat notifications=Chates értesítések
-On join notifications=Belépési értesírés
-HUD notifications= HUD értesítés
-Sound notifications=Hang értesítés
-Message list=Üzenetek listája
-Show unread in different color=Mutasd a nem olvasottakat más színnel
-Show CC/BCC in different color=Mutasd a CC-t/BCC-t más színnel
-Default sorting fields=Alap válogató terület
-Other=
-Move deleted messages to trash=
 Reset=Viszaállítás
-From/To=Tól(től)/neki
 Restore=
 Empty=
 Trash is empty=
+From/To=Tól(től)/neki
+No contacts=
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=Chates értesítések
+Receive a message in the chat when there is a new message=
+On join notifications=Belépési értesírés
+Receive a message at login when inbox isn't empty=
+HUD notifications= HUD értesítés
+Show an HUD notification when inbox isn't empty=
+Sound notifications=Hang értesítés
+Play a sound when there is a new message=
+Show unread in different color=Mutasd a nem olvasottakat más színnel
+Show CC/BCC in different color=Mutasd a CC-t/BCC-t más színnel
+Default sorting field=Alap válogató terület
+Default sorting direction=
+Move deleted messages to trash=
+Automatic marking read=
+Mark a message as read when opened=
+Date format=
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=Értesítések
+Message list=Üzenetek listája
+Fields=
+Spam=
+Other=
+Date and Time=
+years=
+months=
+weeks=
+days=
+hours=
+minuts=
+seconds=
+@1 ago=
+
+
+##### not used anymore #####
+
+Version=Verzió

locale/mail.id.tr

@@ -0,0 +1,128 @@
+# textdomain: mail
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=Anda memiliki surel! ketik /mail untuk membaca
+You have a new message from @1! Subject: @2=Anda memiliki pesan baru dari @1! Subjek: @2
+To view it, type /mail=Untuk melihatnya, ketik /mail
+You could also use the button in your inventory.=Anda juga dapat menggunakan tombol dalam inventaris Anda.
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=Disediakan oleh mt-mods
+Version: @1=
+Licenses=Lisensi
+Expat (code), WTFPL (textures)=Expat (kode), WTFPL (tekstur)
+Communication using this system is NOT guaranteed to be private!=Komunikasi dengan sistem ini TIDAK dijamin bersifat pribadi!
+Admins are able to view the messages of any player.=Admin dapat melihat pesan dari setiap pemain.
+Contributors=Kontributor
+Group by name=
+Group by contribution=
+Note=Catatan
+Settings=Pengaturan
+About=Tentang
+BCC=BCC
+Cancel=Batal
+Save draft=Simpan Draf
+Send=Kirim
+Subject=Subjek
+To=Kpd
+CC=CC
+Delete=Hapus
+New=Baru
+Edit=Sunting
+Back=Kembali
+Name=Nama
+No drafts=Tidak ada draf
+Trash=Sampah
+Inbox=Kotak Masuk
+Outbox=Kotak Keluar
+Drafts=Draf
+Contacts=Kontak
+Mail lists=Milis
+Options=Pengaturan
+Close=Tutup
+(No subject)=(Tanpa subjek)
+Player name=Nama pemain
+That name is already in your contacts=Nama itu sudah ada dalam kontak Anda
+The contact name cannot be empty.=Nama kontak tidak boleh kosong.
+Save=Simpan
+Maillist name=Nama milis
+Desc=Deskripsi
+Players=Pemain
+That name is already in your mailing lists.=Nama tersebut sudah ada dalam milis Anda.
+The mailing list name cannot be empty.=Nama milis tidak boleh kosong.
+Mark Read=Tndai Sdh Dibaca
+Mark Unread=Tndai Blm Dibaca
+Mark Spam=
+Unmark Spam=
+Reply=Balas
+Reply all=Balas Semua
+Forward=Teruskan
+Reply only to the sender=Balas hanya kepada pengirim
+Reply to all involved people=Balas kepada semua orang yang terlibat
+Transfer message to other people=Teruskan pesan kepada orang lain
+Date=Tanggal
+From=Dari
+Filter=Saring
+Allow multiple selection=Izinkan beberapa pilihan
+@1 of @2 selected=@1 dari @2 dipilih
+(Un)select all=Batal/Pilih Semua
+No mail=Tidak ada surat
+Read=Baca
+Ascending=Menaik
+Descending=Menurun
+(No description)=(Tidak ada deskripsi)
+No maillist=Tidak ada milis
+Receivers=Penerima
+(Un)mute sender=
+Add=Tambah
+Remove=Hapus
+Reset=Atur Ulang
+Restore=Kembalikan
+Empty=Kosong
+Trash is empty=Sampah kosong
+From/To=Dari/Kpd
+No contacts=Tidak ada kontak
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=Pemberitahuan obrolan
+Receive a message in the chat when there is a new message=Terima pesan dalam obrolan ketika ada pesan baru
+On join notifications=Pemberitahuan saat bergabung
+Receive a message at login when inbox isn't empty=Terima pesan saat masuk log ketika kotak masuk tidak kosong
+HUD notifications=Pemberitahuan HUD
+Show an HUD notification when inbox isn't empty=Tampilkan pemberitahuan HUD saat kotak masuk tidak kosong
+Sound notifications=Pemberitahuan suara
+Play a sound when there is a new message=Putar suara saat ada pesan baru
+Show unread in different color=Tampilkan belum dibaca dengan warna berbeda
+Show CC/BCC in different color=Tampilkan CC/BCC dengan warna berbeda
+Default sorting field=Kolom pengurutan bawaan
+Default sorting direction=Arah pengurutan bawaan
+Move deleted messages to trash=Pindahkan pesan yang dihapus ke sampah
+Automatic marking read=Penandaan otomatis sudah dibaca
+Mark a message as read when opened=Tandai pesan sebagai sudah dibaca saat dibuka
+Date format=Format tanggal
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=Pemberitahuan
+Message list=Daftar Pesan
+Fields=
+Spam=
+Other=Lain-Lain
+Date and Time=
+years=tahun
+months=bulan
+weeks=pekan
+days=hari
+hours=jam
+minuts=menit
+seconds=detik
+@1 ago=@1 yang lalu
+
+
+##### not used anymore #####
+
+Version=Versi

locale/mail.pt_BR.tr

@@ -1,23 +1,40 @@
 # textdomain: mail
-Provided my mt-mods=
-Version=
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=Você recebeu e-mail! Tecle /mail para ler
+You have a new message from @1! Subject: @2=Você tem uma mensagem de @1! Assunto: @2
+To view it, type /mail=Para visualizar a mensagem, digite /mail
+You could also use the button in your inventory.=Você também pode usar o botão do seu inventário.
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=
+Version: @1=
 Licenses=
 Expat (code), WTFPL (textures)=
 Communication using this system is NOT guaranteed to be private!=A comunicação usando este sistema não possui garantia de privacidade
 Admins are able to view the messages of any player.=Administradores poderão ler as mensagens de qualquer jogador
 Contributors=
+Group by name=
+Group by contribution=
+Note=Nota
 Settings=Ajustes
 About=Sobre
-You have a new message from @1! Subject: @2=Você tem uma mensagem de @1! Assunto: @2
-To view it, type /mail=Para visualizar a mensagem, digite /mail
-You could also use the button in your inventory.=Você também pode usar o botão do seu inventário.
 BCC=BCC
 Cancel=Cancelar
 Save draft=Salvar rascunho
 Send=Enviar
+Subject=Assunto
+To=Para
+CC=CC
+Delete=Apagar
+New=Novo
+Edit=Editar
+Back=Voltar
 Name=Nome
 No drafts=Sem rascunhos
-Edit=Editar
 Trash=
 Inbox=Entrada
 Outbox=Enviadas
@@ -30,52 +47,77 @@ Close=Fechar
 Player name=Nome do jogador
 That name is already in your contacts=Esse nome já consta em sua lista de contatos
 The contact name cannot be empty.=Informe o nome do destinatário
+Save=Salvar
 Maillist name=Nome da lista de discussão
 Desc=Descrição
 Players=Jogador
 That name is already in your mailing lists.=Esse nome ja está sendo usado em sua lista de discussões
 The mailing list name cannot be empty.=O nome da lista de discussões deve ser informado
-Save=Salvar
 Mark Read=Marcar como lido
 Mark Unread=Marcar como não lido
-New=Novo
-(No description)=(sem descrição)
-No maillist=Sem lista de discussão
+Mark Spam=
+Unmark Spam=
+Reply=Responder
+Reply all=Responder Todos
+Forward=Encaminhar
+Reply only to the sender=
+Reply to all involved people=
+Transfer message to other people=
+Date=Data
 From=De
-Delete=Apagar
-Subject=Assunto
-CC=CC
-To=Para
-You have mail! Type /mail to read=Você recebeu e-mail! Tecle /mail para ler
 Filter=Filtrar
 Allow multiple selection=Permitir selecionar vários
 @1 of @2 selected=
 (Un)select all=Desmarcar todos
 No mail=Sem e-mails no momento
-Date=Data
+Read=Ler
 Ascending=Ascendente
 Descending=Descendente
-Read=Ler
-Reply=Responder
-Reply all=Responder Todos
-Forward=Encaminhar
+(No description)=(sem descrição)
+No maillist=Sem lista de discussão
+Receivers=
+(Un)mute sender=
 Add=Adicionar
 Remove=Remover
-Note=Nota
-Back=Voltar
-Notifications=Notificações
-Chat notifications=Notificação de conversa
-On join notifications=Notificação ao entrar
-HUD notifications=Notificação no HUD
-Sound notifications=
-Message list=Lista de mensagens
-Show unread in different color=Exibir mensagens não lidas em uma cor diferente
-Show CC/BCC in different color=Exibir mensagens com copia em uma cor diferente
-Default sorting fields=Ordenamento de campos padrão
-Other=
-Move deleted messages to trash=
 Reset=
-From/To=De/Para
 Restore=
 Empty=
 Trash is empty=
+From/To=De/Para
+No contacts=
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=Notificação de conversa
+Receive a message in the chat when there is a new message=
+On join notifications=Notificação ao entrar
+Receive a message at login when inbox isn't empty=
+HUD notifications=Notificação no HUD
+Show an HUD notification when inbox isn't empty=
+Sound notifications=
+Play a sound when there is a new message=
+Show unread in different color=Exibir mensagens não lidas em uma cor diferente
+Show CC/BCC in different color=Exibir mensagens com copia em uma cor diferente
+Default sorting field=Ordenamento de campo padrão
+Default sorting direction=
+Move deleted messages to trash=
+Automatic marking read=
+Mark a message as read when opened=
+Date format=
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=Notificações
+Message list=Lista de mensagens
+Fields=
+Spam=
+Other=
+Date and Time=
+years=
+months=
+weeks=
+days=
+hours=
+minuts=
+seconds=
+@1 ago=

locale/mail.zh_CN.tr

@@ -1,82 +1,129 @@
 # textdomain: mail
-Provided my mt-mods=
-Version=
-Licenses=
-Expat (code), WTFPL (textures)=
-Communication using this system is NOT guaranteed to be private!=
-Admins are able to view the messages of any player.=
-Contributors=
-Settings=
+The mail could not be sent:=无法发送邮件：
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=您有新邮件，请使用 /mail 查看。
+You have a new message from @1! Subject: @2=您有一封来自 @1 的新邮件，主题为“@2”。
+To view it, type /mail=请使用 /mail 命令查看。
+You could also use the button in your inventory.=您也可以使用物品清单里的按键。
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=由 mt-mods 提供
+Version: @1=
+Licenses=许可证
+Expat (code), WTFPL (textures)=Expat（代码），WTFPL（材质）
+Communication using this system is NOT guaranteed to be private!=这个系统不适用于私密沟通！
+Admins are able to view the messages of any player.=管理员可以查看所有玩家的邮件。
+Contributors=贡献者
+Group by name=
+Group by contribution=
+Note=备注
+Settings=设置
 About=关于
-You have a new message from @1! Subject: @2=
-To view it, type /mail=
-You could also use the button in your inventory.=
 BCC=密送
 Cancel=取消
 Save draft=保存草稿
 Send=发送
+Subject=主题
+To=收件人
+CC=抄送
+Delete=删除
+New=新
+Edit=编辑
+Back=返回
 Name=名字
 #if new means new mail, it would be New=新邮件
 No drafts=没有草稿
-Edit=编辑
-Trash=
+Trash=垃圾箱
 Inbox=收件箱
 Outbox=已发送
 Drafts=草稿
 Contacts=通讯录
 Mail lists=建组
-Options=
+Options=选项
 Close=关闭
-(No subject)=(无主题)
+(No subject)=（无主题）
 Player name=玩家名字
-That name is already in your contacts=
-The contact name cannot be empty.=
-Maillist name=建组名
+That name is already in your contacts=这个玩家已经在您的通讯录里。
+The contact name cannot be empty.=联系人名字不能为空。
+Save=保存
+Maillist name=邮件列表名称
 Desc=描述
 Players=玩家
-That name is already in your mailing lists.=
-The mailing list name cannot be empty.=
-Save=保存
+That name is already in your mailing lists.=这个玩家已经在您的邮件列表里。
+The mailing list name cannot be empty.=邮件列表名称不能为空。
 Mark Read=标记为已读
 Mark Unread=标记为未读
-New=新
-(No description)=(无描述)
-No maillist=无建组
-From=发件人
-Delete=删除
-Subject=主题
-CC=抄送
-To=收件人
-You have mail! Type /mail to read=
-Filter=筛选
-Allow multiple selection=允许多选
-@1 of @2 selected=
-(Un)select all=(取消)选中所有
-No mail=无邮件
-Date=时间
-Ascending=升序
-Descending=降序
-Read=浏览
+Mark Spam=标记为垃圾邮件
+Unmark Spam=取消标记为垃圾邮件
 Reply=回复
 Reply all=回复所有
 Forward=转发
+Reply only to the sender=只回复给发件人
+Reply to all involved people=回复给所有人
+Transfer message to other people=将邮件转发给其他人
+Date=时间
+From=发件人
+Filter=筛选
+Allow multiple selection=允许多选
+@1 of @2 selected=已选中 @2 项中的 @1 项
+(Un)select all=（取消）选中所有
+No mail=无邮件
+Read=浏览
+Ascending=升序
+Descending=降序
+(No description)=（无描述）
+No maillist=无邮件列表
+Receivers=收件人
+(Un)mute sender=屏蔽或取消屏蔽发件人
 Add=添加
 Remove=移除
-Note=备注
-Back=返回
-Notifications=
-Chat notifications=
-On join notifications=
-HUD notifications=
-Sound notifications=
-Message list=
-Show unread in different color=
-Show CC/BCC in different color=
-Default sorting fields=
-Other=
-Move deleted messages to trash=
-Reset=
-From/To=
-Restore=
-Empty=
-Trash is empty=
+Reset=重置
+Restore=恢复
+Empty=空的
+Trash is empty=垃圾箱为空
+From/To=发件人或收件人
+No contacts=无联系人
+The method of delivery to @1 is invalid.=无法将邮件发送给 @1。
+The recipient @1 could not be identified.=无法找到收件人“@1”。
+@1 rejected your mail.=@1 不接收您的邮件。
+Chat notifications=在聊天记录中显示通知
+Receive a message in the chat when there is a new message=收到新邮件时在聊天记录中显示通知。
+On join notifications=加入服务器时显示通知
+Receive a message at login when inbox isn't empty=加入服务器且由新邮件时显示通知。
+HUD notifications=HUD 通知
+Show an HUD notification when inbox isn't empty=收到新邮件时通过 HUD 显示通知。
+Sound notifications=提示音
+Play a sound when there is a new message=收到新邮件时播放提示音
+Show unread in different color=使用不同的颜色标记未读邮件
+Show CC/BCC in different color=使用不同的颜色标记抄送和密送邮件
+Default sorting field=排序依据
+Default sorting direction=排序方向
+Move deleted messages to trash=将已删除的邮件移至垃圾箱
+Automatic marking read=自动将邮件标记为已读
+Mark a message as read when opened=打开邮件时自动将邮件标记为已读
+Date format=日期格式
+Timezone offset=
+Offset to add to server time.=
+Mute list=屏蔽列表
+Notifications=通知
+Message list=邮件列表
+Fields=
+Spam=垃圾邮件
+Other=其它
+Date and Time=
+years=年
+months=月
+weeks=周
+days=天
+hours=小时
+minuts=分钟
+seconds=秒
+@1 ago=@1前
+
+
+##### not used anymore #####
+
+Version=版本

locale/mail.zh_TW.tr

@@ -1,81 +1,128 @@
 # textdomain: mail
-Provided my mt-mods=
-Version=
-Licenses=
-Expat (code), WTFPL (textures)=
-Communication using this system is NOT guaranteed to be private!=
-Admins are able to view the messages of any player.=
-Contributors=
-Settings=
+The mail could not be sent:=無法發送郵件：
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=您有新郵件，請使用 /mail 查看。
+You have a new message from @1! Subject: @2=您有一封來自 @1 的新郵件，主題為“@2”。
+To view it, type /mail=請使用 /mail 指令查看。
+You could also use the button in your inventory.=您也可以使用物品欄裡的按鍵。
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=由 mt-mods 提供
+Version: @1=
+Licenses=許可證
+Expat (code), WTFPL (textures)=Expat（源碼），WTFPL（材質）
+Communication using this system is NOT guaranteed to be private!=此系統不適合私密交流！
+Admins are able to view the messages of any player.=管理員可以查看所有玩家的郵件。
+Contributors=貢獻者
+Group by name=
+Group by contribution=
+Note=備註
+Settings=設置
 About=關於
-You have a new message from @1! Subject: @2=
-To view it, type /mail=
-You could also use the button in your inventory.=
 BCC=密件副本
 Cancel=取消
 Save draft=儲存草稿
 Send=發送
+Subject=主旨
+To=收件人
+CC=副本
+Delete=刪除
+New=新建
+Edit=編輯
+Back=返回
 Name=名稱
 No drafts=沒有草稿
-Edit=編輯
-Trash=
+Trash=垃圾箱
 Inbox=收件箱
 Outbox=寄件備份
 Drafts=草稿
 Contacts=聯繫人
 Mail lists=郵件列表
-Options=
+Options=選項
 Close=關閉
 (No subject)=（沒有主旨）
 Player name=玩家名稱
-That name is already in your contacts=
-The contact name cannot be empty.=
+That name is already in your contacts=玩家已經在您的通訊錄中。
+The contact name cannot be empty.=聯繫人名字不能為空。
+Save=儲存
 Maillist name=郵件列表名稱
 Desc=描述
 Players=玩家
-That name is already in your mailing lists.=
-The mailing list name cannot be empty.=
-Save=儲存
+That name is already in your mailing lists.=玩家已經在您的郵件列表中。
+The mailing list name cannot be empty.=郵件列表名稱不能為空。
 Mark Read=標記已讀
 Mark Unread=標記未讀
-New=新建
-(No description)=（沒有描述）
-No maillist=沒有郵件列表
-From=寄件者
-Delete=刪除
-Subject=主旨
-CC=副本
-To=收件人
-You have mail! Type /mail to read=
-Filter=
-Allow multiple selection=
-@1 of @2 selected=
-(Un)select all=
-No mail=沒有郵件
-Date=日期
-Ascending=
-Descending=
-Read=閱讀
+Mark Spam=標記垃圾郵件
+Unmark Spam=取消標記垃圾郵件
 Reply=回覆
 Reply all=回覆所有人
 Forward=轉寄
+Reply only to the sender=僅回覆給寄件人
+Reply to all involved people=回覆給所有人
+Transfer message to other people=將郵件轉發給所有人
+Date=日期
+From=寄件人
+Filter=篩選
+Allow multiple selection=允許多選
+@1 of @2 selected=已選擇 @2 項中的 @1 項。
+(Un)select all=（取消）選中所有
+No mail=沒有郵件
+Read=閱讀
+Ascending=
+Descending=
+(No description)=（沒有描述）
+No maillist=沒有郵件列表
+Receivers=收件人
+(Un)mute sender=（取消）屏蔽寄件人
 Add=加入
 Remove=移除
-Note=備註
-Back=返回
-Notifications=
-Chat notifications=
-On join notifications=
-HUD notifications=
-Sound notifications=
-Message list=
-Show unread in different color=
-Show CC/BCC in different color=
-Default sorting fields=
-Other=
-Move deleted messages to trash=
-Reset=
-From/To=
-Restore=
-Empty=
-Trash is empty=
+Reset=重置
+Restore=恢復
+Empty=空
+Trash is empty=垃圾箱為空
+From/To=寄件人或收件人
+No contacts=沒有聯繫人
+The method of delivery to @1 is invalid.=無法將郵件發送給 @1。
+The recipient @1 could not be identified.=無法找到收件人“@1”。
+@1 rejected your mail.=@1 不接收您的郵件
+Chat notifications=在聊天室中顯示通知
+Receive a message in the chat when there is a new message=收到新郵件時在聊天室中顯示通知。
+On join notifications=加入伺服器時顯示通知
+Receive a message at login when inbox isn't empty=加入伺服器且有新郵件時顯示通知。
+HUD notifications=HUD 通知
+Show an HUD notification when inbox isn't empty=收到新郵件時在 HUD 中顯示通知。
+Sound notifications=提示聲
+Play a sound when there is a new message=收到新郵件時播放提示聲
+Show unread in different color=使用不同的顏色標記未讀郵件
+Show CC/BCC in different color=使用不同的顏色標記副本和密件副本
+Default sorting field=排序方式
+Default sorting direction=排序順序
+Move deleted messages to trash=將已刪除的郵件移至垃圾箱
+Automatic marking read=自動將郵件標記已讀
+Mark a message as read when opened=打開郵件時自動將郵件標記已讀
+Date format=日期格式
+Timezone offset=
+Offset to add to server time.=
+Mute list=屏蔽列表
+Notifications=通知
+Message list=郵件列表
+Fields=
+Spam=垃圾郵件
+Other=其他
+Date and Time=
+years=年
+months=月
+weeks=周
+days=日
+hours=小時
+minuts=分鐘
+seconds=秒
+@1 ago=@1前
+
+
+##### not used anymore #####
+
+Version=版本

locale/template.txt

@@ -1,23 +1,40 @@
 # textdomain: mail
-Provided my mt-mods=
-Version=
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=
+You have a new message from @1! Subject: @2=
+To view it, type /mail=
+You could also use the button in your inventory.=
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=
+Version: @1=
 Licenses=
 Expat (code), WTFPL (textures)=
 Communication using this system is NOT guaranteed to be private!=
 Admins are able to view the messages of any player.=
 Contributors=
+Group by name=
+Group by contribution=
+Note=
 Settings=
 About=
-You have a new message from @1! Subject: @2=
-To view it, type /mail=
-You could also use the button in your inventory.=
 BCC=
 Cancel=
 Save draft=
 Send=
+Subject=
+To=
+CC=
+Delete=
+New=
+Edit=
+Back=
 Name=
 No drafts=
-Edit=
 Trash=
 Inbox=
 Outbox=
@@ -30,52 +47,77 @@ Close=
 Player name=
 That name is already in your contacts=
 The contact name cannot be empty.=
+Save=
 Maillist name=
 Desc=
 Players=
 That name is already in your mailing lists.=
 The mailing list name cannot be empty.=
-Save=
 Mark Read=
 Mark Unread=
-New=
-(No description)=
-No maillist=
+Mark Spam=
+Unmark Spam=
+Reply=
+Reply all=
+Forward=
+Reply only to the sender=
+Reply to all involved people=
+Transfer message to other people=
+Date=
 From=
-Delete=
-Subject=
-CC=
-To=
-You have mail! Type /mail to read=
 Filter=
 Allow multiple selection=
 @1 of @2 selected=
 (Un)select all=
 No mail=
-Date=
+Read=
 Ascending=
 Descending=
-Read=
-Reply=
-Reply all=
-Forward=
+(No description)=
+No maillist=
+Receivers=
+(Un)mute sender=
 Add=
 Remove=
-Note=
-Back=
-Notifications=
-Chat notifications=
-On join notifications=
-HUD notifications=
-Sound notifications=
-Message list=
-Show unread in different color=
-Show CC/BCC in different color=
-Default sorting fields=
-Other=
-Move deleted messages to trash=
 Reset=
-From/To=
 Restore=
 Empty=
 Trash is empty=
+From/To=
+No contacts=
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=
+Receive a message in the chat when there is a new message=
+On join notifications=
+Receive a message at login when inbox isn't empty=
+HUD notifications=
+Show an HUD notification when inbox isn't empty=
+Sound notifications=
+Play a sound when there is a new message=
+Show unread in different color=
+Show CC/BCC in different color=
+Default sorting field=
+Default sorting direction=
+Move deleted messages to trash=
+Automatic marking read=
+Mark a message as read when opened=
+Date format=
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=
+Message list=
+Fields=
+Spam=
+Other=
+Date and Time=
+years=
+months=
+weeks=
+days=
+hours=
+minuts=
+seconds=
+@1 ago=

mail.hu.tr

@@ -1,76 +0,0 @@
-# textdomain: mail
-# author: nyomi
-Provided my mt-mods=Feltéve, hogy az én mt-mod-om
-Version=Verzió
-Licenses=License
-Expat (code), WTFPL (textures)=Expat (kód), WTFPL (textúrák)
-Communication using this system is NOT guaranteed to be private!=A systemben lévő komunikáció nem garantáltan privát!
-Admins are able to view the messages of any player.=Az adminok megtudják nézni minden játékos üzenetjét.
-Contributors=Közreműködöttek
-Note=Jegyzet
-Settings=Beállítások
-About=Róla
-You have a new message from @1! Subject: @2=Van egy új üzeneted @1-től Cím: @2
-To view it, type /mail=Ahhoz hogy megnézd, írd /mail
-You could also use the button in your inventory.=A gombot is tudod használni az inventoridban.
-BCC=BCC
-Cancel=Mégse
-Save draft=mentés piszkozatként
-Send=Küldés
-Subject=Cím
-To=Neki
-CC=CC
-Name=Név
-No drafts=Nincsenek piszkozatok
-Edit=Szerkesztés
-New=Új
-Delete=Törlés
-Inbox=PostaLáda
-Outbox=Elküldött üzenetek
-Drafts=Piszkozatok
-Contacts=Contaktok
-Mail lists=Levelező lista
-Options=Lehetőségek
-Close=Bezár
-(No subject)=(nincs cím)
-Player name=Játékos neve
-That name is already in your contacts=A név már a kontaktok között van
-The contact name cannot be empty.=A contakt neve nem lehet üres.
-Save=Mentés
-Maillist name=Levelező lista neve
-Desc=Desc
-Players=Játékosok
-That name is already in your mailing lists.=A név már benne van a levelező listában
-The mailing list name cannot be empty.=A levelező lista neve nem lehet üres
-Mark Read=Jelöld olvasottként
-Mark Unread=Jelöld olvasatlanul
-From=Tőle
-Read=Olvasott
-Filter=Filterek
-Allow multiple selection=
-@1 selected=@1 kiválasztva
-(Un)select all=(ne válaszd ki) mindegyik választása
-No mail=Nincs levél
-Reply=Válasz
-Reply all=Válaszmindenkinek
-Forward=Továbbítás
-Date=Dátum
-Ascending=Emelkedő
-Descending=Sűlyedő
-(No description)=(Nincs leírás)
-No maillist=Nincs levelező lista
-You have mail! Type /mail to read=Van egy leveled! Írd /mail az olvasáshoz
-Add=Hozzáadás
-Remove=Elvétel
-Back=Visza
-Notifications=Értesítések
-Chat notifications=Chates értesítések
-On join notifications=Belépési értesírés
-HUD notifications= HUD értesítés
-Sound notifications=Hang értesítés
-Message list=Üzenetek listája
-Show unread in different color=Mutasd a nem olvasottakat más színnel
-Show CC/BCC in different color=Mutasd a CC-t/BCC-t más színnel
-Default sorting fields=Alap válogató terület
-From/To=Tól(től)/neki
-Reset=Viszaállítás

migrate.lua

@@ -1,5 +1,5 @@
-
 local STORAGE_VERSION_KEY = "@@version"
+local CURRENT_VERSION = 3.1
 
 local function migrate_v1_to_v3()
 	local file = io.open(minetest.get_worldpath().."/mail.db", "r")
@@ -80,13 +80,136 @@ local function migrate_v2_to_v3()
 	end)
 end
 
+
+
+local function search_box(playername, box, uuid)
+	local e = mail.get_storage_entry(playername)
+	for _, m in ipairs(e[box]) do
+		if m.id == uuid then
+		return { time = m.time, from = m.from, to = m.to, cc = m.cc, bcc = m.bcc, subject = m.subject, body = m.body } end
+	end
+	return false
+end
+
+local function search_boxes(playername, boxes, uuid)
+	local result
+	for _, b in ipairs(boxes) do
+		result = search_box(playername, b, uuid)
+		if result then return result end
+	end
+end
+
+local function is_uuid_existing(uuid)
+	local boxes = {"inbox", "outbox", "drafts", "trash"}
+	if mail.storage.get_keys then
+		for _, k in ipairs(mail.storage:get_keys()) do
+			if string.sub(k,1,5) == "mail/" then
+				local p = string.sub(k, 6)
+				local result = search_boxes(p, boxes, uuid)
+				if result then return result end
+			end
+		end
+	else
+		for p, _ in minetest.get_auth_handler().iterate() do
+			local result = search_boxes(p, boxes, uuid)
+			if result then return result end
+		end
+    end
+    return false
+end
+
+local function are_message_sames(a, b)
+	return a.time == b.time
+	   and a.from == b.from
+	   and a.to == b.to
+	   and a.cc == b.cc
+	   and a.bcc == b.bcc
+	   and a.subject == b.subject
+	   and a.body == b.body
+end
+
+local function replace_other_player_message_uuid(p, m, uuid, new_uuid)
+	local er = mail.get_storage_entry(p)
+	for _, r in ipairs(er.inbox) do
+		if r.id == uuid and not are_message_sames(m, r) then
+			r.id = new_uuid
+		end
+	end
+	for _, r in ipairs(er.outbox) do
+		if r.id == uuid and not are_message_sames(m, r) then
+			r.id = new_uuid
+		end
+	end
+	for _, r in ipairs(er.drafts) do
+		if r.id == uuid and not are_message_sames(m, r) then
+			r.id = new_uuid
+		end
+	end
+	for _, r in ipairs(er.trash) do
+		if r.id == uuid and not are_message_sames(m, r) then
+			r.id = new_uuid
+		end
+	end
+	mail.set_storage_entry(p, er)
+end
+
+local function fix_box_duplicate_uuids(playername, box)
+	local e = mail.get_storage_entry(playername)
+	for _, m in ipairs(e[box]) do
+		local uuid = m.id
+		local exists = is_uuid_existing(uuid)
+		if exists and not are_message_sames(exists, m) then
+			local new_uuid = mail.new_uuid() -- generates a new uuid to replace doublons
+			if mail.storage.get_keys then
+				for _, k in ipairs(mail.storage:get_keys()) do
+					if string.sub(k,1,5) == "mail/" then
+						local p = string.sub(k, 6)
+						replace_other_player_message_uuid(p, m, uuid, new_uuid)
+					end
+				end
+			else
+				for p, _ in minetest.get_auth_handler().iterate() do
+					replace_other_player_message_uuid(p, m, uuid, new_uuid)
+				end
+			end
+		end
+	end
+end
+
+local function fix_player_duplicate_uuids(playername)
+	fix_box_duplicate_uuids(playername, "inbox")
+	fix_box_duplicate_uuids(playername, "outbox")
+	fix_box_duplicate_uuids(playername, "drafts")
+	fix_box_duplicate_uuids(playername, "trash")
+end
+
+-- repair database for uuid doublons
+local function repair_storage()
+	-- iterate through players
+	-- get_keys() was introduced in 5.7
+	if mail.storage.get_keys then
+		for _, k in ipairs(mail.storage:get_keys()) do
+			if string.sub(k,1,5) == "mail/" then
+				local p = string.sub(k, 6)
+				fix_player_duplicate_uuids(p)
+			end
+		end
+	else
+		minetest.after(0, function()
+			for p, _ in minetest.get_auth_handler().iterate() do
+				fix_player_duplicate_uuids(p)
+			end
+		end)
+	end
+end
+
 function mail.migrate()
 	-- check for v2 storage first, v1-migration might have set the v3-flag already
-	local version = mail.storage:get_int(STORAGE_VERSION_KEY)
-	if version < 3 then
+	local version = mail.storage:get_float(STORAGE_VERSION_KEY)
+	if version < math.floor(CURRENT_VERSION) then
 		-- v2 to v3
 		migrate_v2_to_v3()
-		mail.storage:set_int(STORAGE_VERSION_KEY, 3)
+		mail.storage:set_float(STORAGE_VERSION_KEY, CURRENT_VERSION)
 	end
 
 	-- check for v1 storage
@@ -94,6 +217,12 @@ function mail.migrate()
 	if v1_file then
 		-- v1 to v3
 		migrate_v1_to_v3()
-		mail.storage:set_int(STORAGE_VERSION_KEY, 3)
+		mail.storage:set_float(STORAGE_VERSION_KEY, CURRENT_VERSION)
+	end
+
+	-- repair storage for uuid doublons
+	if version < CURRENT_VERSION  then
+		repair_storage()
+		mail.storage:set_float(STORAGE_VERSION_KEY, CURRENT_VERSION)
 	end
 end

mod.conf

@@ -1,3 +1,4 @@
 name = mail
 description = ingame mail-system
-optional_depends = canonical_name,default,mtt,unified_inventory
+
+optional_depends = canonical_name,default,mtt,unified_inventory,sfinv_buttons,beerchat

onjoin.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 minetest.register_on_joinplayer(function(player)
 	minetest.after(2, function(name)
@@ -17,7 +17,7 @@ minetest.register_on_joinplayer(function(player)
 
 		if unreadcount > 0 and mail.get_setting(name, "onjoin_notifications") then
 			minetest.chat_send_player(name,
-				minetest.colorize("#00f529", "(" ..  unreadcount .. ") " .. S("You have mail! Type /mail to read")))
+				minetest.colorize(mail.get_color("new"), "(" .. unreadcount .. ") " .. S("You have mail! Type /mail to read")))
 		end
 	end, player:get_player_name())
 end)

player_recipients.lua

@@ -0,0 +1,53 @@
+-- translation
+local S = mail.S
+
+local has_canonical_name = minetest.get_modpath("canonical_name")
+
+mail.register_on_player_receive(function(name, msg)
+	-- add to inbox
+	local entry = mail.get_storage_entry(name)
+	table.insert(entry.inbox, msg)
+	mail.set_storage_entry(name, entry)
+
+	-- notify recipients that happen to be online
+	local mail_alert = S("You have a new message from @1! Subject: @2",  msg.from, msg.subject) ..
+	"\n" .. S("To view it, type /mail")
+	local inventory_alert = S("You could also use the button in your inventory.")
+	local player = minetest.get_player_by_name(name)
+	if player then
+		if mail.get_setting(name, "chat_notifications") == true then
+			minetest.chat_send_player(name, mail_alert)
+			if minetest.get_modpath("unified_inventory") or minetest.get_modpath("sfinv_buttons") then
+				minetest.chat_send_player(name, inventory_alert)
+			end
+		end
+		if mail.get_setting(name, "sound_notifications") == true then
+			minetest.sound_play("mail_notif", {to_player=name})
+		end
+		local receiver_entry = mail.get_storage_entry(name)
+		local receiver_messages = receiver_entry.inbox
+		mail.hud_update(name, receiver_messages)
+	end
+end)
+
+mail.register_recipient_handler(function(_, pname)
+	if not minetest.player_exists(pname) then
+		return nil
+	end
+	return true, function(msg)
+		for _, on_player_receive in ipairs(mail.registered_on_player_receives) do
+			if on_player_receive(pname, msg) then
+				break
+			end
+		end
+	end
+end)
+
+if has_canonical_name then
+	mail.register_recipient_handler(function(_, name)
+		local realname = canonical_name.get(name)
+		if realname then
+			return true, realname
+		end
+	end)
+end

storage.lua

@@ -61,6 +61,9 @@ local function save_worker()
 	-- clear queue
 	save_queued_entries = {}
 
+	-- clear cached entries
+	cache = {}
+
 	-- save every second
 	minetest.after(1, save_worker)
 end
@@ -151,38 +154,46 @@ function mail.sort_messages(messages, sortfield, descending, filter)
 	return results
 end
 
--- marks a mail read by its id
-function mail.mark_read(playername, msg_ids)
+local function mark_property(playername, property, msg_ids, value, hud_update)
 	local entry = mail.get_storage_entry(playername)
 	if type(msg_ids) ~= "table" then -- if this is not a table
 		msg_ids = { msg_ids }
 	end
-	for _, read_msg_id in ipairs(msg_ids) do
+	for _, property_msg_id in ipairs(msg_ids) do
 		for _, entry_msg in ipairs(entry.inbox) do
-			if entry_msg.id == read_msg_id then
-				entry_msg.read = true
+			if entry_msg.id == property_msg_id then
+				entry_msg[property] = value
 			end
 		end
 	end
 	mail.set_storage_entry(playername, entry)
+	if hud_update then
 		mail.hud_update(playername, entry.inbox)
+	end
+	return
+end
+
+-- marks a mail read by its id
+function mail.mark_read(playername, msg_ids)
+	mark_property(playername, "read", msg_ids, true, true)
 	return
 end
 
 -- marks a mail unread by its id
 function mail.mark_unread(playername, msg_ids)
-	local entry = mail.get_storage_entry(playername)
-	if type(msg_ids) ~= "table" then -- if this is not a table
-		msg_ids = { msg_ids }
-	end
-	for _, unread_msg_id in ipairs(msg_ids) do
-		for _, entry_msg in ipairs(entry.inbox) do
-			if entry_msg.id == unread_msg_id then
-				entry_msg.read = false
-			end
-		end
-	end
-	mail.set_storage_entry(playername, entry)
+	mark_property(playername, "read", msg_ids, false, true)
+	return
+end
+
+-- marks a mail as a spam
+function mail.mark_spam(playername, msg_ids)
+	mark_property(playername, "spam", msg_ids, true)
+	return
+end
+
+-- marks a mail as a non-spam
+function mail.unmark_spam(playername, msg_ids)
+	mark_property(playername, "spam", msg_ids, false)
 	return
 end
 
@@ -335,6 +346,9 @@ function mail.get_maillist_by_name(playername, listname)
 	local entry = mail.get_storage_entry(playername)
 	for _, list in ipairs(entry.lists) do
 		if list.name == listname then
+			if not list.players then
+				list.players = {}
+			end
 			return list
 		end
 	end
@@ -351,6 +365,9 @@ function mail.update_maillist(playername, list, old_list_name)
 		end
 	end
 	-- insert
+	if not list.players then
+		list.players = {}
+	end
 	table.insert(entry.lists, list)
 	mail.set_storage_entry(playername, entry)
 end
@@ -367,61 +384,72 @@ function mail.delete_maillist(playername, listname)
 	end
 end
 
-function mail.extractMaillists(receivers_string, maillists_owner)
-	local receivers = mail.parse_player_list(receivers_string) -- extracted receivers
+local function extract_maillists_main(receivers, maillists_owner, expanded_receivers, seen)
+	if type(receivers) == "string" then
+		receivers = mail.parse_player_list(receivers)
+	end
 
-	-- extract players from mailing lists
-	while string.find(receivers_string, "@") do
-		local globalReceivers = mail.parse_player_list(receivers_string) -- receivers including maillists
-		receivers = {}
-		for _, receiver in ipairs(globalReceivers) do
-			local receiverInfo = receiver:split("@") -- @maillist
-			if receiverInfo[1] and receiver == "@" .. receiverInfo[1] then
-				local maillist = mail.get_maillist_by_name(maillists_owner, receiverInfo[1])
+	for _, receiver in pairs(receivers) do
+		if seen[receiver] then
+			-- Do not add/expand this receiver as it is already seen
+			minetest.log("verbose", ("mail: ignoring duplicate receiver %q during maillist expansion"):format(receiver))
+		elseif string.find(receiver, "^@") then
+			seen[receiver] = true
+			local listname = string.sub(receiver, 2)
+			local maillist = mail.get_maillist_by_name(maillists_owner, listname)
 			if maillist then
-					for _, playername in ipairs(maillist.players) do
-						table.insert(receivers, playername)
+				minetest.log("verbose", ("mail: expanding maillist %q"):format(listname))
+				for _, entry in ipairs(maillist.players) do
+					extract_maillists_main(entry, maillists_owner, expanded_receivers, seen)
 				end
 			end
-			else -- in case of player
-				table.insert(receivers, receiver)
-			end
-		end
-		receivers_string = mail.concat_player_list(receivers)
-	end
-
-	return receivers
-end
-
-function mail.get_setting_default_value(setting_name)
-	local default_values = {
-		chat_notifications = true,
-		onjoin_notifications = true,
-		hud_notifications = true,
-		sound_notifications = true,
-		unreadcolorenable = true,
-		cccolorenable = true,
-		defaultsortfield = 3,
-		defaultsortdirection = 1,
-		trash_move_enable = true,
-	}
-	return default_values[setting_name]
-end
-
-function mail.get_setting(playername, setting_name)
-	local entry = mail.get_storage_entry(playername)
-	if entry.settings[setting_name] ~= nil then
-		return entry.settings[setting_name]
 		else
-		return mail.get_setting_default_value(setting_name)
+			seen[receiver] = true
+			minetest.log("verbose", ("mail: adding %q to receiver list during maillist expansion"):format(receiver))
+			table.insert(expanded_receivers, receiver)
 		end
+	end
+end
+
+function mail.extract_maillists(receivers, maillists_owner)
+	local expanded_receivers = {}
+	extract_maillists_main(receivers, maillists_owner, expanded_receivers, {})
+	return expanded_receivers
+end
+
+function mail.get_setting_default_value(key)
+	return mail.settings[key].default
+end
+
+function mail.get_setting(playername, key)
+	local entry = mail.get_storage_entry(playername)
+	local value = (entry.settings[key] == nil
+		and {mail.get_setting_default_value(key)}
+		or {entry.settings[key]})[1]
+
+	if mail.settings[key].sync then -- in case this setting is shared with another mod
+		local sync_value = mail.settings[key].sync(playername) -- get new value
+		if sync_value then
+			value = sync_value
+			mail.set_setting(playername, key, value, true) -- update the setting in mail storage and don't transfer it again
+		end
+	end
+
+	return value
 end
 
 -- add or update a setting
-function mail.set_setting(playername, key, value)
+function mail.set_setting(playername, key, value, not_transfer)
 	local entry = mail.get_storage_entry(playername)
-	entry.settings[key] = value
+	local valid_value = value
+	if mail.settings[key].check then
+		valid_value = mail.settings[key].check(playername, value)
+	end
+	entry.settings[key] = valid_value
 	mail.set_storage_entry(playername, entry)
+	if not not_transfer and mail.settings[key].transfer then -- in case this setting is shared with another mod
+		mail.settings[key].transfer(playername, valid_value)
+	end
 end
 
 function mail.reset_settings(playername)
@@ -430,7 +458,7 @@ function mail.reset_settings(playername)
 	mail.set_storage_entry(playername, entry)
 end
 
-function mail.pairsByKeys(t, f)
+function mail.pairs_by_keys(t, f)
 	-- http://www.lua.org/pil/19.3.html
 	local a = {}
 	for n in pairs(t) do table.insert(a, n) end

ui/about.lua

@@ -1,48 +1,123 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:about"
 
+local groups = {
+	{ "o", S("Original author")},
+	{ "c", S("Code")},
+	{ "i", S("Internationalization")},
+	{ "t", S("Textures")},
+	{ "a", S("Audio")},
+}
+
+local contributors = {
+	{ name = "Cheapie", groups = {"o", "c"} },
+	{ name = "aBlueShadow", groups = {"c"} },
+	{ name = "APercy", groups = {"i"} },
+	{ name = "Athozus", groups = {"c", "i"} },
+	{ name = "BuckarooBanzay", groups = {"c"} },
+	{ name = "Chache", groups = {"i"} },
+	{ name = "Dennis Jenkins", groups = {"c"} },
+	{ name = "Emojigit", groups = {"c", "i"} },
+	{ name = "Eredin", groups = {"i"} },
+	{ name = "fluxionary", groups = {"c"} },
+	{ name = "imre84", groups = {"c"} },
+	{ name = "Muhammad Rifqi Priyo Susanto", groups = {"i"} },
+	{ name = "NatureFreshMilk", groups = {"c", "t"} },
+	{ name = "Niklp", groups = {"c", "i"} },
+	{ name = "Nuno Filipe Povoa", groups = {"a"} },
+	{ name = "nyomi", groups = {"i"} },
+	{ name = "OgelGames", groups = {"c"} },
+	{ name = "Panquesito7", groups = {"c"} },
+	{ name = "Peter Nerlich", groups = {"c"} },
+	{ name = "Rubenwardy", groups = {"c"} },
+	{ name = "savilli", groups = {"c"} },
+	{ name = "Singularis", groups = {"c"} },
+	{ name = "SX", groups = {"c"} },
+	{ name = "TheTrueBeginner", groups = {"i"} },
+	{ name = "Thomas Rudin", groups = {"c"} },
+	{ name = "Toby1710", groups = {"c"} },
+	{ name = "whosit", groups = {"c"} },
+	{ name = "Wuzzy", groups = {"i"} },
+	{ name = "y5nw", groups = {"c", "i"} },
+}
+
 function mail.show_about(name)
+	mail.selected_idxs.contributor_grouping[name] = tonumber(mail.selected_idxs.contributor_grouping[name]) or 1
+
 	local formspec = [[
 			size[10,6;]
-			tabheader[0.3,1;optionstab;]] .. S("Settings") .. "," .. S("About") .. [[;2;false;false]
+			tabheader[0,0;optionstab;]] .. S("Settings") .. "," .. S("About") .. [[;2;false;false]
 			button[9.35,0;0.75,0.5;back;X]
-			label[0,0.8;Mail]
-			label[0,1.2;]] .. S("Provided my mt-mods") .. [[]
-			label[0,1.6;]] .. S("Version") .. [[ : 1.2.0-dev]
-			label[0,2.2;]] .. S("Licenses") .. [[ :]
-			label[0.2,2.6;]] .. S("Expat (code), WTFPL (textures)") .. [[]
-			label[0,3.2;https://github.com/mt-mods/mail]
-			label[0,3.6;https://content.minetest.net/packages/mt-mods/mail]
-			textarea[0.5,4.8;4,5.5;;]] .. S("Note") .. [[;]] ..
+
+			box[0,0;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[0.2,0;Mail]
+
+			label[0.2,0.5;]] .. S("Provided by mt-mods") .. [[]
+			label[0.2,0.9;]] .. S("Version: @1", "1.5.0-dev") .. [[]
+
+			box[0,1.5;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[0.2,1.5;]] .. S("Licenses") .. [[]
+			label[0.2,2.0;]] .. S("Expat (code), WTFPL (textures)") .. [[]
+
+			box[0,2.6;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[0.2,2.6;]] .. S("Note") .. [[]
+			textarea[0.5,3.15;4,5.5;;;]] ..
 			S("Communication using this system is NOT guaranteed to be private!") .. " " ..
 			S("Admins are able to view the messages of any player.") .. [[]
 
-			tablecolumns[color;text;text]
-			table[5,0.75;4.9,5.5;contributors;]] ..
-			[[#999,]] .. S("Contributors") .. [[,,]] ..
-			[[#FFD700,Cheapie,Initial idea/project,]] ..
-			[[#FFF,Rubenwardy,Lua/UI improvements,]] ..
-			[[#FFF,BuckarooBanzay,Clean-ups\, Refactoring,]] ..
-			[[#FFF,Athozus,Boxes\, Maillists\, UI\, Settings,]] ..
-			[[#FFF,fluxionary,Minor fixups,]] ..
-			[[#FFF,SX,Various fixes\, UI,]] ..
-			[[#FFF,Toby1710,UX fixes,]] ..
-			[[#FFF,Peter Nerlich,CC\, BCC,]] ..
-			[[#FFF,Niklp,German translation,]] ..
-			[[#FFF,Emojigit,Traditional Chinese trans.,]] ..
-			[[#FFF,Dennis Jenkins,UX fixes,]] ..
-			[[#FFF,Thomas Rudin,Maintenance,]] ..
-			[[#FFF,NatureFreshMilk,Maintenance,]] ..
-			[[#FFF,imre84,UI fixes,]] ..
-			[[#FFF,Chache,Spanish translation,]] ..
-			[[#FFF,APercy,Brazilian Portuguese trans.,]] ..
-			[[#FFF,Nuno Filipe Povoa,mail_notif.ogg,]] ..
-			[[#FFF,TheTrueBeginner,Simplified Chinese trans.,]] ..
-			[[#FFF,nyomi,Hungarian translation,]] ..
-			[[#FFF,whosit,UI fixes]
-		]] .. mail.theme
+			button[0,5.7;2,0.5;github;GitHub]
+			button[2,5.7;2,0.5;contentdb;ContentDB]
+
+			box[4,0;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[4.2,0;]] .. S("Contributors") .. [[]
+
+			dropdown[4,0.75;6.4;contributor_grouping;]]
+				.. S("Group by name") .. ","
+				.. S("Group by contribution") .. ";" .. mail.selected_idxs.contributor_grouping[name] .. [[;true]
+			]]
+
+	local contributor_list, contributor_columns = {}
+
+	if mail.selected_idxs.contributor_grouping[name] == 2 then
+		contributor_columns = "color;text"
+		local sorted = {}
+		for _, g in ipairs(groups) do
+			sorted[g[1]] = {}
+		end
+		for _, c in ipairs(contributors) do
+			for _, g in ipairs(c.groups) do
+				table.insert(sorted[g] or {}, c.name)
+			end
+		end
+		for _, g in ipairs(groups) do
+			table.insert(contributor_list, mail.get_color("header") .. "," .. g[2])
+			for _, c in ipairs(sorted[g[1]]) do
+				table.insert(contributor_list, "," .. c)
+			end
+		end
+	else
+		contributor_columns = "text;text"
+		for _, c in ipairs(contributors) do
+			for _, g in ipairs(groups) do
+				local index = table.indexof(c.groups, g[1])
+				if index >= 1 then
+					if index == 1 then
+						table.insert(contributor_list, c.name)
+					else
+						table.insert(contributor_list, "")
+					end
+					table.insert(contributor_list, g[2])
+				end
+			end
+		end
+	end
+
+	formspec = formspec .. ("tablecolumns[%s]"):format(contributor_columns) ..
+			("table[4,1.6;5.9,4.65;contributors;%s]"):format(table.concat(contributor_list, ","))
+
+	formspec = formspec .. mail.theme
 
 	minetest.show_formspec(name, FORMNAME, formspec)
 end
@@ -64,5 +139,14 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
     elseif fields.optionstab == "2" then
         mail.selected_idxs.optionstab[playername] = 2
         mail.show_about(playername)
+
+	elseif fields.github then
+		minetest.chat_send_player(playername, "https://github.com/mt-mods/mail")
+
+	elseif fields.contentdb then
+		minetest.chat_send_player(playername, "https://content.minetest.net/packages/mt-mods/mail")
+	elseif fields.contributor_grouping then
+		mail.selected_idxs.contributor_grouping[playername] = fields.contributor_grouping
+		mail.show_about(playername)
 	end
 end)

ui/compose.lua

@@ -1,8 +1,7 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:compose"
-local msg_id = {}
 
 function mail.show_compose(name, to, subject, body, cc, bcc, id)
 	local formspec = [[
@@ -27,11 +26,7 @@ function mail.show_compose(name, to, subject, body, cc, bcc, id)
 		minetest.formspec_escape(subject) or "",
 		minetest.formspec_escape(body) or "")
 
-    if id then
-        msg_id[name] = id
-    else
-        msg_id[name] = nil
-    end
+	mail.selected_idxs.message[name] = id or mail.new_uuid()
 
 	minetest.show_formspec(name, FORMNAME, formspec)
 end
@@ -43,10 +38,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
 	local name = player:get_player_name()
     if fields.send then
-        local id = mail.new_uuid()
-        if msg_id[name] then
-            id = msg_id[name]
-        end
+	local id = mail.selected_idxs.message[name] or mail.new_uuid()
         if (fields.to == "" and fields.cc == "" and fields.bcc == "") or fields.body == "" then
             -- if mail is invalid then store it as a draft
             mail.save_draft({
@@ -117,8 +109,8 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
     elseif fields.draft then
         local id = mail.new_uuid()
-        if msg_id[name] then
-            id = msg_id[name]
+        if mail.selected_idxs.message[name] then
+            id = mail.selected_idxs.message[name]
         end
         mail.save_draft({
             id = id,

ui/contacts.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:contacts"
 
@@ -9,7 +9,7 @@ local contacts_formspec = "size[8,9;]" .. mail.theme .. [[
 		button[6,1.60;2,0.5;delete;]] .. S("Delete") .. [[]
 		button[6,8.25;2,0.5;back;]] .. S("Back") .. [[]
 		tablecolumns[color;text;text]
-		table[0,0;5.75,9;contacts;#999,]] .. S("Name") .. "," .. S("Note")
+		table[0,0;5.75,9;contacts;]] .. mail.get_color("header") .. "," .. S("Name") .. "," .. S("Note")
 
 
 function mail.show_contacts(name)
@@ -27,7 +27,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
 	if fields.contacts then
 		local evt = minetest.explode_table_event(fields.contacts)
-		for k, _, i in mail.pairsByKeys(contacts) do
+		for k, _, i in mail.pairs_by_keys(contacts) do
 			if i == evt.row - 1 then
 				mail.selected_idxs.contacts[name] = tonumber(k)
 				break
@@ -58,7 +58,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			-- except if it was the last. Then determine the new last
 			local found = false
 			local last = nil
-			for k in mail.pairsByKeys(contacts) do
+			for k in mail.pairs_by_keys(contacts) do
 				if found then
 					mail.selected_idxs.contacts[name] = tonumber(k)
 					break

ui/drafts.lua

@@ -1,6 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
-
+local S = mail.S
 
 function mail.show_drafts(name)
 	local trash_tab = ""
@@ -8,20 +7,20 @@ function mail.show_drafts(name)
 		trash_tab = "," .. S("Trash")
 	end
 
-	local drafts_formspec = "size[8.5,10;]" .. mail.theme .. [[
+	local drafts_formspec = "size[8.5,11;]" .. mail.theme .. [[
 		tabheader[0.3,1;boxtab;]] ..
 		S("Inbox") .. "," .. S("Outbox").. "," .. S("Drafts") .. trash_tab .. [[;3;false;false]
 
 		button[6,0.10;2.5,0.5;new;]] .. S("New") .. [[]
 		button[6,0.95;2.5,0.5;edit;]] .. S("Edit") .. [[]
 		button[6,1.70;2.5,0.5;delete;]] .. S("Delete") .. [[]
-		button[6,6.8;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
-		button[6,7.6;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
-			button[6,8.7;2.5,0.5;options;]] .. S("Options") .. [[]
-		button_exit[6,9.5;2.5,0.5;quit;]] .. S("Close") .. [[]
+		button[6,8.0;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+		button[6,8.8;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+		button[6,9.7;2.5,0.5;options;]] .. S("Options") .. [[]
+		button_exit[6,10.5;2.5,0.5;quit;]] .. S("Close") .. [[]
 
 		tablecolumns[color;text;text]
-		table[0,0.7;5.75,9.35;drafts;#999,]] .. S("To") .. "," .. S("Subject")
+		table[0,0.7;5.75,10.35;drafts;]] .. mail.get_color("header") .. "," .. S("To") .. "," .. S("Subject")
 
     local formspec = { drafts_formspec }
     local entry = mail.get_storage_entry(name)

ui/edit_contact.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:editcontact"
 

ui/edit_maillists.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:editmaillist"
 
@@ -59,7 +59,6 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 						desc = fields.desc,
 						players = mail.parse_player_list(fields.players)
 					}, old_maillist.name)
-					maillists[mail.selected_idxs.maillists[name]] = nil
 				end
 			else
 				mail.update_maillist(name, {

ui/events.lua

@@ -1,6 +1,6 @@
 
 -- Getter to filter and sort messages on demand
-local function messageGetter(messages, sortfield, ascending, filter)
+local function message_getter(messages, sortfield, ascending, filter)
     local results
     return function()
         if not results then
@@ -18,8 +18,10 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
     if formname ~= "mail:inbox" and formname ~= "mail:outbox"
     and formname ~= "mail:drafts" and formname ~= "mail:trash" then
         return
-    elseif fields.quit then
-        return
+    end
+
+    if fields.quit then
+        return true
     end
 
     -- Get player name and handle / convert common input fields
@@ -52,8 +54,8 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
     local entry = mail.get_storage_entry(name)
     local messagesDrafts = entry.drafts
     local messagesTrash = entry.trash
-    local getInbox = messageGetter(entry.inbox, inboxsortfield, sortdirection == "2", filter)
-    local getOutbox = messageGetter(entry.outbox, outboxsortfield, sortdirection == "2", filter)
+    local getInbox = message_getter(entry.inbox, inboxsortfield, sortdirection == "2", filter)
+    local getOutbox = message_getter(entry.outbox, outboxsortfield, sortdirection == "2", filter)
 
     -- Hanmdle formspec event
     if fields.inbox then -- inbox table
@@ -64,7 +66,12 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
             end
             mail.selected_idxs.sortfield[name] = evt.column-1 -- update column
             mail.show_mail_menu(name)
-            return
+            return true
+        end
+        local inbox = getInbox()[evt.row-1]
+        if not inbox then
+            mail.show_mail_menu(name)
+            return true
         end
         if mail.selected_idxs.multipleselection[name] then
             if not mail.selected_idxs.inbox[name] then
@@ -73,7 +80,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
             local selected_id = 0
             if mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
                 for i, selected_msg in ipairs(mail.selected_idxs.inbox[name]) do
-                    if getInbox()[evt.row-1].id == selected_msg then
+                    if inbox.id == selected_msg then
                         selected_id = i
                         table.remove(mail.selected_idxs.inbox[name], i)
                         break
@@ -81,13 +88,16 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
                 end
             end
             if selected_id == 0 then
-                table.insert(mail.selected_idxs.inbox[name], getInbox()[evt.row-1].id)
+                table.insert(mail.selected_idxs.inbox[name], inbox.id)
+                mail.selected_idxs.message[name] = inbox.id
             end
         else
-            mail.selected_idxs.inbox[name] = { (getInbox()[evt.row-1] or {}).id }
+            mail.selected_idxs.inbox[name] = { inbox.id }
+            mail.selected_idxs.message[name] = inbox.id
         end
-        if evt.type == "DCL" and getInbox()[evt.row-1] then
-            mail.show_message(name, getInbox()[evt.row-1].id)
+        if evt.type == "DCL" then
+            mail.selected_idxs.message[name] = inbox.id
+            mail.show_message(name, inbox.id)
         else
             mail.show_mail_menu(name)
         end
@@ -102,7 +112,12 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
             end
             mail.selected_idxs.sortfield[name] = evt.column-1 -- update column
             mail.show_mail_menu(name)
-            return
+            return true
+        end
+        local outbox = getOutbox()[evt.row-1]
+        if not outbox then
+            mail.show_mail_menu(name)
+            return true
         end
         if mail.selected_idxs.multipleselection[name] then
             if not mail.selected_idxs.outbox[name] then
@@ -111,7 +126,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
             local selected_id = 0
             if mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
                 for i, selected_msg in ipairs(mail.selected_idxs.outbox[name]) do
-                    if getOutbox()[evt.row-1].id == selected_msg then
+                    if outbox.id == selected_msg then
                         selected_id = i
                         table.remove(mail.selected_idxs.outbox[name], i)
                         break
@@ -119,13 +134,16 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
                 end
             end
             if selected_id == 0 then
-                table.insert(mail.selected_idxs.outbox[name], getOutbox()[evt.row-1].id)
+                table.insert(mail.selected_idxs.outbox[name], outbox.id)
+                mail.selected_idxs.message[name] = outbox.id
             end
         else
-            mail.selected_idxs.outbox[name] = { (getOutbox()[evt.row-1] or {}).id }
+            mail.selected_idxs.outbox[name] = { outbox.id }
+            mail.selected_idxs.message[name] = outbox.id
         end
-        if evt.type == "DCL" and getOutbox()[evt.row-1] then
-            mail.show_message(name, getOutbox()[evt.row-1].id)
+        if evt.type == "DCL" then
+            mail.selected_idxs.message[name] = outbox.id
+            mail.show_message(name, outbox.id)
         else
             mail.show_mail_menu(name)
         end
@@ -144,6 +162,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
         end
         mail.selected_idxs.drafts[name] = evt.row - 1
         if evt.type == "DCL" and messagesDrafts[mail.selected_idxs.drafts[name]] then
+            mail.selected_idxs.message[name] = messagesDrafts[mail.selected_idxs.drafts[name]].id
             mail.show_compose(name,
             messagesDrafts[mail.selected_idxs.drafts[name]].to,
             messagesDrafts[mail.selected_idxs.drafts[name]].subject,
@@ -168,6 +187,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
         end
         mail.selected_idxs.trash[name] = evt.row - 1
         if evt.type == "DCL" and messagesTrash[mail.selected_idxs.trash[name]] then
+            mail.selected_idxs.message[name] = messagesTrash[mail.selected_idxs.trash[name]].id
             mail.show_message(name, messagesTrash[mail.selected_idxs.trash[name]].id)
         end
         return true
@@ -191,11 +211,14 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
     elseif fields.read then
         if formname == "mail:inbox" and nonempty(mail.selected_idxs.inbox[name]) then -- inbox table
-            mail.show_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
+            mail.selected_idxs.message[name] = mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]]
         elseif formname == "mail:outbox" and nonempty(mail.selected_idxs.outbox[name]) then -- outbox table
-            mail.show_message(name, mail.selected_idxs.outbox[name][#mail.selected_idxs.outbox[name]])
+            mail.selected_idxs.message[name] = mail.selected_idxs.outbox[name][#mail.selected_idxs.outbox[name]]
         elseif formname == "mail:trash" and messagesTrash[mail.selected_idxs.trash[name]] then
-            mail.show_message(name, messagesTrash[mail.selected_idxs.trash[name]].id)
+            mail.selected_idxs.message[name] = messagesTrash[mail.selected_idxs.trash[name]].id
+        end
+        if mail.selected_idxs.message[name] then
+            mail.show_message(name, mail.selected_idxs.message[name])
         end
 
     elseif fields.edit then
@@ -290,6 +313,20 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
         mail.show_mail_menu(name, sortfieldindex, sortdirection, filter)
 
+    elseif fields.markspam then
+        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] then
+            mail.mark_spam(name, mail.selected_idxs.inbox[name])
+        end
+
+        mail.show_mail_menu(name, sortfieldindex, sortdirection, filter)
+
+    elseif fields.unmarkspam then
+        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] then
+            mail.unmark_spam(name, mail.selected_idxs.inbox[name])
+        end
+
+        mail.show_mail_menu(name, sortfieldindex, sortdirection, filter)
+
     elseif fields.new then
         mail.show_compose(name)
 

ui/inbox.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 function mail.show_inbox(name, sortfieldindex, sortdirection, filter)
     sortfieldindex = tonumber(sortfieldindex or mail.selected_idxs.sortfield[name])
@@ -13,12 +13,27 @@ function mail.show_inbox(name, sortfieldindex, sortdirection, filter)
     local sortfield = ({"from","subject","time"})[sortfieldindex]
     local messages = mail.sort_messages(entry.inbox, sortfield, sortdirection == "2", filter)
 
+    if mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
+        for i, selected_msg in ipairs(mail.selected_idxs.inbox[name]) do
+            local is_present = false
+            for _, msg in ipairs(messages) do
+                if msg.id == selected_msg then
+                    is_present = true
+                    break
+                end
+            end
+            if not is_present then
+                table.remove(mail.selected_idxs.inbox[name], i)
+            end
+        end
+    end
+
     local trash_tab = ""
     if mail.get_setting(name, "trash_move_enable") then
         trash_tab = "," .. S("Trash")
     end
 
-    local inbox_formspec = "size[8.5,10;]" .. mail.theme .. [[
+    local inbox_formspec = "size[8.5,11;]" .. mail.theme .. [[
         tabheader[0.3,1;boxtab;]] ..
         S("Inbox") .. "," .. S("Outbox").. "," .. S("Drafts") .. trash_tab .. [[;1;false;false]
 
@@ -28,37 +43,46 @@ function mail.show_inbox(name, sortfieldindex, sortdirection, filter)
         button[6,2.45;2.5,0.5;replyall;]] .. S("Reply all") .. [[]
         button[6,3.20;2.5,0.5;forward;]] .. S("Forward") .. [[]
         button[6,3.95;2.5,0.5;delete;]] .. S("Delete") .. [[]
-        button[6,4.82;2.5,0.5;markread;]] .. S("Mark Read") .. [[]
+        button[6,4.85;2.5,0.5;markread;]] .. S("Mark Read") .. [[]
         button[6,5.55;2.5,0.5;markunread;]] .. S("Mark Unread") .. [[]
-        button[6,6.8;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
-        button[6,7.6;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
-        button[6,8.7;2.5,0.5;options;]] .. S("Options") .. [[]
-        button_exit[6,9.5;2.5,0.5;quit;]] .. S("Close") .. [[]
+        button[6,6.4;2.5,0.5;markspam;]] .. S("Mark Spam") .. [[]
+        button[6,7.1;2.5,0.5;unmarkspam;]] .. S("Unmark Spam") .. [[]
+        button[6,8.0;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+        button[6,8.8;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+        button[6,9.7;2.5,0.5;options;]] .. S("Options") .. [[]
+        button_exit[6,10.5;2.5,0.5;quit;]] .. S("Close") .. [[]
 
-        dropdown[0,8.5;2,0.5;sortfield;]] ..
+        tooltip[reply;]] .. S("Reply only to the sender") .. [[]
+        tooltip[replyall;]] .. S("Reply to all involved people") .. [[]
+        tooltip[forward;]] .. S("Transfer message to other people") .. [[]
+
+        dropdown[0,9.5;2,0.5;sortfield;]] ..
         S("From") .. "," .. S("Subject") .. "," .. S("Date") .. [[;]] .. sortfieldindex .. [[;true]
-        dropdown[2.0,8.5;2,0.5;sortdirection;]] ..
+        dropdown[2.0,9.5;2,0.5;sortdirection;]] ..
         S("Ascending") .. "," .. S("Descending") .. [[;]] .. sortdirection .. [[;true]
-        field[4.25,8.95;1.4,0.5;filter;]] .. S("Filter") .. [[:;]] .. filter .. [[]
-        button[5.14,8.62;0.85,0.5;search;Q]
+        field[4.25,9.95;1.4,0.5;filter;]] .. S("Filter") .. [[:;]] .. filter .. [[]
+        image_button[5.14,9.5;0.85,0.85;search.png;search;]
 
-        checkbox[0,9.1;multipleselection;]] .. S("Allow multiple selection") .. [[;]] ..
+        checkbox[0,10.1;multipleselection;]] .. S("Allow multiple selection") .. [[;]] ..
         tostring(mail.selected_idxs.multipleselection[name]) .. [[]
-        label[0,9.65;]] .. S("@1 of @2 selected", tostring(#mail.selected_idxs.inbox[name]), tostring(#messages)) .. [[]
-        button[3.5,9.5;2.5,0.5;selectall;]] .. S("(Un)select all") .. [[]
+        label[0,10.65;]] ..
+        S("@1 of @2 selected", tostring(#mail.selected_idxs.inbox[name]), tostring(#messages)) .. [[]
+        button[3.5,10.5;2.5,0.5;selectall;]] .. S("(Un)select all") .. [[]
 
         tablecolumns[color;text;text]
-        table[0,0.7;5.75,7.45;inbox;#999,]] .. S("From") .. "," .. S("Subject")
+        table[0,0.7;5.75,8.45;inbox;]] .. mail.get_color("header") .. "," .. S("From") .. "," .. S("Subject")
     local formspec = { inbox_formspec }
 
     mail.message_drafts[name] = nil
 
     local unread_color_enable = mail.get_setting(name, "unreadcolorenable")
     local cc_color_enable = mail.get_setting(name, "cccolorenable")
+    local mute_list = mail.get_setting(name, "mute_list")
 
     if #messages > 0 then
         for _, message in ipairs(messages) do
             local selected_id = 0
+            local displayed_color = {}
             -- check if message is in selection list and return its id
             if mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
                 for i, selected_msg in ipairs(mail.selected_idxs.inbox[name]) do
@@ -69,34 +93,21 @@ function mail.show_inbox(name, sortfieldindex, sortdirection, filter)
                 end
             end
             if selected_id > 0 then
+                table.insert(displayed_color, "selected")
+            end
             if not message.read and unread_color_enable then
+                table.insert(displayed_color, "important")
+            end
             if not mail.player_in_list(name, message.to) and cc_color_enable then
-                        formspec[#formspec + 1] = ",#A39E5D"
-                    else
-                        formspec[#formspec + 1] = ",#A39E19"
-                    end
-                else
-                    if not mail.player_in_list(name, message.to) and cc_color_enable then
-                        formspec[#formspec + 1] = ",#899888"
-                    else
-                        formspec[#formspec + 1] = ",#466432"
-                    end
-                end
-            else
-                if not message.read and unread_color_enable then
-                    if not mail.player_in_list(name, message.to) and cc_color_enable then
-                        formspec[#formspec + 1] = ",#FFD788"
-                    else
-                        formspec[#formspec + 1] = ",#FFD700"
-                    end
-                else
-                    if not mail.player_in_list(name, message.to) and cc_color_enable then
-                        formspec[#formspec + 1] = ",#CCCCDD"
-                    else
-                        formspec[#formspec + 1] = ","
+                table.insert(displayed_color, "additional")
             end
+            if message.spam then
+                table.insert(displayed_color, "warning")
             end
+            if table.indexof(mute_list, message.from) >= 1 then
+                table.insert(displayed_color, "muted")
             end
+            formspec[#formspec + 1] = "," .. mail.get_color(displayed_color)
             formspec[#formspec + 1] = ","
             formspec[#formspec + 1] = minetest.formspec_escape(message.from)
             formspec[#formspec + 1] = ","
@@ -116,20 +127,5 @@ function mail.show_inbox(name, sortfieldindex, sortdirection, filter)
         formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("No mail") .. "]"
     end
 
-    if mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
-        for i, selected_msg in ipairs(mail.selected_idxs.inbox[name]) do
-            local is_present = false
-            for _, msg in ipairs(messages) do
-                if msg.id == selected_msg then
-                    is_present = true
-                    break
-                end
-            end
-            if not is_present then
-                table.remove(mail.selected_idxs.inbox[name], i)
-            end
-        end
-    end
-
     minetest.show_formspec(name, "mail:inbox", table.concat(formspec, ""))
 end

ui/init.lua

@@ -1,3 +1,23 @@
+-- sub files
+local MP = minetest.get_modpath(minetest.get_current_modname())
+
+dofile(MP .. "/ui/inbox.lua")
+dofile(MP .. "/ui/outbox.lua")
+dofile(MP .. "/ui/drafts.lua")
+dofile(MP .. "/ui/trash.lua")
+dofile(MP .. "/ui/message.lua")
+dofile(MP .. "/ui/receivers.lua")
+dofile(MP .. "/ui/events.lua")
+dofile(MP .. "/ui/contacts.lua")
+dofile(MP .. "/ui/edit_contact.lua")
+dofile(MP .. "/ui/select_contact.lua")
+dofile(MP .. "/ui/maillists.lua")
+dofile(MP .. "/ui/edit_maillists.lua")
+dofile(MP .. "/ui/compose.lua")
+dofile(MP .. "/ui/options.lua")
+dofile(MP .. "/ui/settings.lua")
+dofile(MP .. "/ui/about.lua")
+
 -- helper function for tabbed overview
 
 function mail.show_mail_menu(playername, sortfield, sortdirection, filter)

ui/maillists.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:maillists"
 
@@ -9,7 +9,7 @@ local maillists_formspec = "size[8,9;]" .. mail.theme .. [[
 		button[6,1.60;2,0.5;delete;]] .. S("Delete") .. [[]
 		button[6,8.25;2,0.5;back;]] .. S("Back") .. [[]
 		tablecolumns[color;text;text]
-		table[0,0;5.75,9;maillists;#999,]] .. S("Name") .. "," .. S("Note")
+		table[0,0;5.75,9;maillists;]] .. mail.get_color("header") .. "," .. S("Name") .. "," .. S("Note")
 
 function mail.show_maillists(name)
 	local formspec = { maillists_formspec }
@@ -22,7 +22,7 @@ function mail.show_maillists(name)
 			formspec[#formspec + 1] = "@" .. minetest.formspec_escape(maillist.name)
 			formspec[#formspec + 1] = ","
 			if maillist.desc ~= "" then
-				if string.len(maillist.desc) > 30 then
+				if string.len(maillist.desc or "") > 30 then
 					formspec[#formspec + 1] = minetest.formspec_escape(string.sub(maillist.desc, 1, 27))
 					formspec[#formspec + 1] = "..."
 				else
@@ -85,7 +85,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			-- except if it was the last. Then determine the new last
 			local found = false
 			local last = nil
-			for k in mail.pairsByKeys(maillists) do
+			for k in mail.pairs_by_keys(maillists) do
 				if found then
 					mail.selected_idxs.maillists[name] = k
 					break

ui/message.lua

@@ -1,42 +1,70 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:message"
 
+local function interleave_msg(body)
+	return "> " .. (body or ""):gsub("\n", "\n> ")
+end
+
+
 function mail.show_message(name, id)
 	local message = mail.get_message(name, id)
+	if not message then
+		-- message not found or vanished
+		return
+	end
+
+	mail.selected_idxs.message[name] = id
 
 	local formspec = [[
-			size[8,9]
+			size[10,10]
 
-			box[0,0;7,1.9;#466432]
+			box[0,0;7,1.9;]] .. mail.get_color("highlighted") .. [[]
 
-			button[7.25,0.15;0.75,0.5;back;X]
+			button[9.25,0.15;0.75,0.5;back;X]
+			button[7.25,-0.07;2,1;receivers;]] .. S("Receivers") .. [[]
 
 			label[0.2,0.1;]] .. S("From") .. [[: %s]
 			label[0.2,0.5;]] .. S("To") .. [[: %s]
 			label[0.2,0.9;]] .. S("CC") .. [[: %s]
 			label[0.2,1.3;]] .. S("Date") .. [[: %s]
+			tooltip[0.2,1.3;4.8,0.4;]] .. mail.time_ago(message.time) .. [[]
 
 			label[0,2.1;]] .. S("Subject") .. [[: %s]
-			textarea[0.25,2.6;8,7.0;;;%s]
+			textarea[0.25,2.6;7.25,8.75;;;%s]
 
-			button[0,8.5;2,1;reply;]] .. S("Reply") .. [[]
-			button[2,8.5;2,1;replyall;]] .. S("Reply all") .. [[]
-			button[4,8.5;2,1;forward;]] .. S("Forward") .. [[]
-			button[6,8.5;2,1;delete;]] .. S("Delete") .. [[]
+			button[7.25,1.0;2.75,1;reply;]] .. S("Reply") .. [[]
+			button[7.25,1.8;2.75,1;replyall;]] .. S("Reply all") .. [[]
+			button[7.25,2.6;2.75,1;forward;]] .. S("Forward") .. [[]
+
+			button[7.25,3.6;2.75,1;markspam;]] .. S("Mark Spam") .. [[]
+			button[7.25,4.4;2.75,1;unmarkspam;]] .. S("Unmark Spam") .. [[]
+
+			button[7.25,5.4;2.75,1;togglemute;]] .. S("(Un)mute sender") .. [[]
+
+			box[7.25,6.4;2.5,2.75;]] .. mail.get_color("disabled") .. [[]
+
+			button[7.25,9.25;2.75,1;delete;]] .. S("Delete") .. [[]
+
+			tooltip[reply;]] .. S("Reply only to the sender") .. [[]
+			tooltip[replyall;]] .. S("Reply to all involved people") .. [[]
+			tooltip[forward;]] .. S("Transfer message to other people") .. [[]
 		]] .. mail.theme
 
 	local from = minetest.formspec_escape(message.from) or ""
 	local to = minetest.formspec_escape(message.to) or ""
+	if string.len(to) > 70 then to = string.sub(to, 1, 67) .. "..." end
 	local cc = minetest.formspec_escape(message.cc) or ""
+	if string.len(cc) > 50 then cc = string.sub(cc, 1, 47) .. "..." end
 	local date = type(message.time) == "number"
-		and minetest.formspec_escape(os.date("%Y-%m-%d %X", message.time)) or ""
+		and minetest.formspec_escape(os.date(mail.get_setting(name, "date_format"),
+		message.time+3600*mail.get_setting(name, "timezone_offset"))) or ""
 	local subject = minetest.formspec_escape(message.subject) or ""
 	local body = minetest.formspec_escape(message.body) or ""
 	formspec = string.format(formspec, from, to, cc, date, subject, body)
 
-	if not message.read then
+	if not message.read and mail.get_setting(name, "auto_marking_read") then
 		-- mark as read
 		mail.mark_read(name, id)
 	end
@@ -51,8 +79,7 @@ function mail.reply(name, message)
 		minetest.log("error", "[mail] current mail-context: " .. dump(mail.selected_idxs))
 		return
 	end
-	local replyfooter = "Type your reply here.\n\n--Original message follows--\n" ..message.body
-	mail.show_compose(name, message.from, "Re: "..message.subject, replyfooter)
+	mail.show_compose(name, message.from, "Re: "..message.subject, interleave_msg(message.body))
 end
 
 function mail.replyall(name, message)
@@ -63,8 +90,6 @@ function mail.replyall(name, message)
 		return
 	end
 
-	local replyfooter = "Type your reply here.\n\n--Original message follows--\n" ..message.body
-
 	-- new recipients are the sender plus the original recipients, minus ourselves
 	local recipients = message.to or ""
 	if message.from ~= nil then
@@ -89,12 +114,11 @@ function mail.replyall(name, message)
 	end
 	cc = mail.concat_player_list(cc)
 
-	mail.show_compose(name, recipients, "Re: "..message.subject, replyfooter, cc)
+	mail.show_compose(name, recipients, "Re: "..message.subject, interleave_msg(message.body), cc)
 end
 
 function mail.forward(name, message)
-	local fwfooter = "Type your message here.\n\n--Original message follows--\n" .. (message.body or "")
-	mail.show_compose(name, "", "Fw: " .. (message.subject or ""), fwfooter)
+	mail.show_compose(name, "", "Fw: " .. (message.subject or ""), interleave_msg(message.body))
 end
 
 minetest.register_on_player_receive_fields(function(player, formname, fields)
@@ -103,16 +127,8 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 
 	local name = player:get_player_name()
-    local entry = mail.get_storage_entry(name)
 
-	local message = ""
-	if mail.selected_idxs.inbox[name] and mail.selected_idxs.boxtab[name] == 1 then
-		message = mail.get_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
-	elseif mail.selected_idxs.outbox[name] and mail.selected_idxs.boxtab[name] == 2 then
-		message = mail.get_message(name, mail.selected_idxs.outbox[name][#mail.selected_idxs.outbox[name]])
-	elseif mail.selected_idxs.trash[name] and mail.selected_idxs.boxtab[name] == 4 then
-		message = mail.get_message(name, entry.trash[mail.selected_idxs.trash[name]].id)
-	end
+	local message = mail.get_message(name, mail.selected_idxs.message[name])
 
 	if fields.back then
 		mail.show_mail_menu(name)
@@ -127,6 +143,22 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	elseif fields.forward then
 		mail.forward(name, message)
 
+	elseif fields.markspam then
+		mail.mark_spam(name, message.id)
+
+	elseif fields.unmarkspam then
+		mail.unmark_spam(name, message.id)
+
+	elseif fields.togglemute then
+		local mutes = table.copy(mail.get_setting(name, "mute_list"))
+		local mute_indexof = table.indexof(mutes, message.from)
+		if mute_indexof == -1 then -- mute
+			table.insert(mutes, message.from)
+		else -- unmute
+			table.remove(mutes, mute_indexof)
+		end
+		mail.set_setting(name, "mute_list", mutes)
+
 	elseif fields.delete then
         if mail.get_setting(name, "trash_move_enable") and mail.selected_idxs.boxtab[name] ~= 4 then
 			mail.trash_mail(name, message.id)
@@ -134,6 +166,9 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			mail.delete_mail(name, message.id, true)
 		end
 		mail.show_mail_menu(name)
+
+	elseif fields.receivers then
+		mail.show_receivers(name, message.id)
 	end
 
 	return true

ui/outbox.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 function mail.show_outbox(name, sortfieldindex, sortdirection, filter)
     sortfieldindex = tonumber(sortfieldindex or mail.selected_idxs.sortfield[name])
@@ -13,12 +13,27 @@ function mail.show_outbox(name, sortfieldindex, sortdirection, filter)
 	local sortfield = ({"to","subject","time"})[sortfieldindex]
     local messages = mail.sort_messages(entry.outbox, sortfield, sortdirection == "2", filter)
 
+    if mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
+        for i, selected_msg in ipairs(mail.selected_idxs.outbox[name]) do
+            local is_present = false
+            for _, msg in ipairs(messages) do
+                if msg.id == selected_msg then
+                    is_present = true
+                    break
+                end
+            end
+            if not is_present then
+                table.remove(mail.selected_idxs.outbox[name], i)
+            end
+        end
+    end
+
     local trash_tab = ""
     if mail.get_setting(name, "trash_move_enable") then
         trash_tab = "," .. S("Trash")
     end
 
-	local outbox_formspec = "size[8.5,10;]" .. mail.theme .. [[
+	local outbox_formspec = "size[8.5,11;]" .. mail.theme .. [[
 		tabheader[0.3,1;boxtab;]] ..
 		S("Inbox") .. "," .. S("Outbox").. "," .. S("Drafts") .. trash_tab .. [[;2;false;false]
 
@@ -28,25 +43,30 @@ function mail.show_outbox(name, sortfieldindex, sortdirection, filter)
 		button[6,2.45;2.5,0.5;replyall;]] .. S("Reply all") .. [[]
 		button[6,3.20;2.5,0.5;forward;]] .. S("Forward") .. [[]
 		button[6,3.95;2.5,0.5;delete;]] .. S("Delete") .. [[]
-		button[6,6.8;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
-		button[6,7.6;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
-        button[6,8.7;2.5,0.5;options;]] .. S("Options") .. [[]
-		button_exit[6,9.5;2.5,0.5;quit;]] .. S("Close") .. [[]
+		button[6,8.0;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+		button[6,8.8;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+        button[6,9.7;2.5,0.5;options;]] .. S("Options") .. [[]
+		button_exit[6,10.5;2.5,0.5;quit;]] .. S("Close") .. [[]
 
-        dropdown[0,8.5;2,0.5;sortfield;]] ..
+        tooltip[reply;]] .. S("Reply only to the sender") .. [[]
+        tooltip[replyall;]] .. S("Reply to all involved people") .. [[]
+        tooltip[forward;]] .. S("Transfer message to other people") .. [[]
+
+        dropdown[0,9.5;2,0.5;sortfield;]] ..
         S("To") .. "," .. S("Subject") .. "," .. S("Date") .. [[;]] .. sortfieldindex .. [[;true]
-        dropdown[2.0,8.5;2,0.5;sortdirection;]] ..
+        dropdown[2.0,9.5;2,0.5;sortdirection;]] ..
         S("Ascending") .. "," .. S("Descending") .. [[;]] .. sortdirection .. [[;true]
-        field[4.25,8.95;1.4,0.5;filter;]] .. S("Filter") .. [[:;]] .. filter .. [[]
-        button[5.14,8.62;0.85,0.5;search;Q]
+        field[4.25,9.95;1.4,0.5;filter;]] .. S("Filter") .. [[:;]] .. filter .. [[]
+        image_button[5.14,9.5;0.85,0.85;search.png;search;]
 
-        checkbox[0,9.1;multipleselection;]] .. S("Allow multiple selection") .. [[;]] ..
+        checkbox[0,10.1;multipleselection;]] .. S("Allow multiple selection") .. [[;]] ..
         tostring(mail.selected_idxs.multipleselection[name]) .. [[]
-        label[0,9.65;]] .. S("@1 of @2 selected", tostring(#mail.selected_idxs.outbox[name]), tostring(#messages)) ..[[]
-        button[3.5,9.5;2.5,0.5;selectall;]] .. S("(Un)select all") .. [[]
+        label[0,10.65;]] ..
+        S("@1 of @2 selected", tostring(#mail.selected_idxs.outbox[name]), tostring(#messages)) .. [[]
+        button[3.5,10.5;2.5,0.5;selectall;]] .. S("(Un)select all") .. [[]
 
 		tablecolumns[color;text;text]
-		table[0,0.7;5.75,7.45;outbox;#999,]] .. S("To") .. "," .. S("Subject")
+        table[0,0.7;5.75,8.45;outbox;]] .. mail.get_color("header") .. "," .. S("To") .. "," .. S("Subject")
 	local formspec = { outbox_formspec }
 
 	mail.message_drafts[name] = nil
@@ -54,6 +74,7 @@ function mail.show_outbox(name, sortfieldindex, sortdirection, filter)
 	if #messages > 0 then
         for _, message in ipairs(messages) do
             local selected_id = 0
+            local displayed_color = {}
             -- check if message is in selection list and return its id
             if mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
                 for i, selected_msg in ipairs(mail.selected_idxs.outbox[name]) do
@@ -64,10 +85,9 @@ function mail.show_outbox(name, sortfieldindex, sortdirection, filter)
                 end
             end
             if selected_id > 0 then
-				formspec[#formspec + 1] = ",#466432"
-            else
-				formspec[#formspec + 1] = ","
+                table.insert(displayed_color, "selected")
             end
+            formspec[#formspec + 1] = "," .. mail.get_color(displayed_color)
             formspec[#formspec + 1] = ","
 			if string.len(message.to) > 20 then
 				formspec[#formspec + 1] = minetest.formspec_escape(string.sub(message.to, 1, 17))
@@ -92,20 +112,5 @@ function mail.show_outbox(name, sortfieldindex, sortdirection, filter)
         formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("No mail") .. "]"
     end
 
-    if mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
-        for i, selected_msg in ipairs(mail.selected_idxs.outbox[name]) do
-            local is_present = false
-            for _, msg in ipairs(messages) do
-                if msg.id == selected_msg then
-                    is_present = true
-                    break
-                end
-            end
-            if not is_present then
-                table.remove(mail.selected_idxs.outbox[name], i)
-            end
-        end
-    end
-
 	minetest.show_formspec(name, "mail:outbox", table.concat(formspec, ""))
 end

ui/receivers.lua

@@ -0,0 +1,54 @@
+-- translation
+local S = minetest.get_translator("mail")
+
+local FORMNAME = "mail:receivers"
+
+function mail.show_receivers(name, id)
+	local message = mail.get_message(name, id)
+
+	local formspec = [[
+			size[8,6]
+
+			box[0,0;7,1.1;]] .. mail.get_color("highlighted") .. [[]
+
+			button[7.25,0.15;0.75,0.5;back;X]
+
+			label[0.2,0.1;]] .. S("From") .. [[: %s]
+			label[0.2,0.5;]] .. S("Date") .. [[: %s]
+
+			tablecolumns[color;text]
+			table[0,1.5;3.8,4.5;to;%s]
+
+			tablecolumns[color;text]
+			table[4,1.5;3.8,4.5;cc;%s]
+		]] .. mail.theme
+
+	local from = minetest.formspec_escape(message.from) or ""
+	local to = mail.parse_player_list(message.to or "")
+	local to_str = mail.get_color("header") .. "," .. S("To") .. ",,"
+	to_str = to_str .. table.concat(to, ",,")
+	local cc = mail.parse_player_list(message.cc or "")
+	local cc_str = mail.get_color("header") .. "," .. S("CC") .. ",,"
+	cc_str = cc_str .. table.concat(cc, ",,")
+	local date = type(message.time) == "number"
+		and minetest.formspec_escape(os.date(mail.get_setting(name, "date_format"), message.time)) or ""
+	formspec = string.format(formspec, from, date, to_str, cc_str)
+
+	minetest.show_formspec(name, FORMNAME, formspec)
+end
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	if formname ~= FORMNAME then
+		return
+	end
+
+	local name = player:get_player_name()
+
+	local message_id = mail.selected_idxs.message[name]
+
+	if fields.back then
+		mail.show_message(name, message_id)
+	end
+
+	return true
+end)

ui/select_contact.lua

@@ -1,19 +1,19 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:selectcontact"
 
 local select_contact_formspec = "size[8,9;]" .. mail.theme .. [[
     tablecolumns[color;text;text]
-    table[0,0;3.5,9;contacts;#999,]] .. S("Name") .. "," .. S("Note") .. [[%s]
+    table[0,0;3.5,9;contacts;]] .. mail.get_color("header") .. "," .. S("Name") .. "," .. S("Note") .. [[%s]
     button[3.55,2.00;1.75,0.5;toadd;→ ]] .. S("Add") .. [[]
     button[3.55,2.75;1.75,0.5;toremove;← ]] .. S("Remove") .. [[]
     button[3.55,6.00;1.75,0.5;ccadd;→ ]] .. S("Add") .. [[]
     button[3.55,6.75;1.75,0.5;ccremove;← ]] .. S("Remove") .. [[]
     tablecolumns[color;text;text]
-    table[5.15,0.0;2.75,4.5;to;#999,]] .. S("To") .. ":," .. S("Note") .. [[%s]
+    table[5.15,0.0;2.75,4.5;to;]] .. mail.get_color("header") .. "," .. S("To") .. ":," .. S("Note") .. [[%s]
     tablecolumns[color;text;text]
-    table[5.15,4.6;2.75,4.5;cc;#999,]] .. S("CC") .. ":," .. S("Note") .. [[%s]
+    table[5.15,4.6;2.75,4.5;cc;]] .. mail.get_color("header") .. "," .. S("CC") .. ":," .. S("Note") .. [[%s]
     button[3.55,8.25;1.75,0.5;back;]] .. S("Back") .. [[]
 ]]
 
@@ -75,7 +75,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		if fields[v.."add"] then
 			update = true
 			if mail.selected_idxs.contacts[name] then
-				for k, contact, i in mail.pairsByKeys(contacts) do
+				for k, contact, i in mail.pairs_by_keys(contacts) do
 					if k == mail.selected_idxs.contacts[name] or i == mail.selected_idxs.contacts[name] then
 						local list = mail.parse_player_list(draft[v])
 						list[#list+1] = contact.name

ui/settings.lua

@@ -1,49 +1,189 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:settings"
 
+local function get_settings_groups(parent)
+    -- generate ordered list of settings
+    local groups = {}
+    for _, g in ipairs(mail.settings_groups) do
+        if (g.parent or 0) == parent then
+            table.insert(groups, g)
+            -- insert sub groups just after the parent group
+            table.insert_all(groups, get_settings_groups(g.name))
+        end
+    end
+    return groups
+end
+
+local groups_labels = {}
+local ordered_groups = get_settings_groups(0)
+local tree_indent = 0
+for i, g in ipairs(ordered_groups) do
+    if not g.parent then tree_indent = 0
+    elseif i > 1 and g.parent == ordered_groups[i-1].name then tree_indent = tree_indent + 1
+    elseif i > 1 and g.parent ~= ordered_groups[i-1].parent then tree_indent = tree_indent - 1
+    end
+    table.insert(groups_labels, tostring(tree_indent))
+    table.insert(groups_labels, g.label)
+end
+local groups_str = table.concat(groups_labels, ",")
+
 function mail.show_settings(name)
+    local group_index = 1
+    mail.selected_idxs.settings_group[name] = mail.selected_idxs.settings_group[name] or mail.settings_groups[1].name
+
+    for i, g in ipairs(ordered_groups) do
+        if g.name == mail.selected_idxs.settings_group[name] then
+            group_index = i
+            break
+        end
+    end
+
 	local formspec = [[
 			size[10,6;]
-			tabheader[0.3,1;optionstab;]] .. S("Settings") .. "," .. S("About") .. [[;1;false;false]
+			tabheader[0,0;optionstab;]] .. S("Settings") .. "," .. S("About") .. [[;1;false;false]
 			button[9.35,0;0.75,0.5;back;X]
 
-			box[0,0.8;3,0.45;#466432]
-			label[0.2,0.8;]] .. S("Notifications") .. [[]
-            checkbox[0,1.2;chat_notifications;]] .. S("Chat notifications") .. [[;]] ..
-            tostring(mail.get_setting(name, "chat_notifications")) .. [[]
-            checkbox[0,1.6;onjoin_notifications;]] .. S("On join notifications") .. [[;]] ..
-            tostring(mail.get_setting(name, "onjoin_notifications")) .. [[]
-            checkbox[0,2.0;hud_notifications;]] .. S("HUD notifications") .. [[;]] ..
-            tostring(mail.get_setting(name, "hud_notifications")) .. [[]
-            checkbox[0,2.4;sound_notifications;]] .. S("Sound notifications") .. [[;]] ..
-            tostring(mail.get_setting(name, "sound_notifications")) .. [[]
+			tablecolumns[tree;text]
+            table[0,0.775;3,4.5;groups;]] .. groups_str .. [[;]] .. group_index .. [[]
 
-			box[5,0.8;3,0.45;#466432]
-			label[5.2,0.8;]] .. S("Message list") .. [[]
-            checkbox[5,1.2;unreadcolorenable;]] .. S("Show unread in different color") .. [[;]] ..
-            tostring(mail.get_setting(name, "unreadcolorenable")) .. [[]
-            checkbox[5,1.6;cccolorenable;]] .. S("Show CC/BCC in different color") .. [[;]] ..
-            tostring(mail.get_setting(name, "cccolorenable")) .. [[]
+			box[0,0;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[0.2,0;]] .. mail.settings_groups[group_index].label .. [[]
 
-			label[5,2.6;]] .. S("Default sorting fields") .. [[]
-            dropdown[5.5,3.0;2,0.5;defaultsortfield;]] ..
-            S("From/To") .. "," .. S("Subject") .. "," .. S("Date") .. [[;]] ..
-            tostring(mail.get_setting(name, "defaultsortfield")) .. [[;true]
-            dropdown[7.5,3.0;2,0.5;defaultsortdirection;]] ..
-            S("Ascending") .. "," .. S("Descending") .. [[;]] ..
-            tostring(mail.get_setting(name, "defaultsortdirection")) .. [[;true]
+            button[0,5.65;2.5,0.5;reset;]] .. S("Reset") .. [[]
+            button[7.5,5.65;2.5,0.5;save;]] .. S("Save") .. [[]
+            ]]
 
-			box[0,3.2;3,0.45;#466432]
-			label[0.2,3.2;]] .. S("Other") .. [[]
-            checkbox[0,3.6;trash_move_enable;]] .. S("Move deleted messages to trash") .. [[;]] ..
-            tostring(mail.get_setting(name, "trash_move_enable")) .. [[]
+    local x = 3.5
+    local y = -0.7
+    -- put settings in order
+    local ordered_settings = {}
+    for setting, data in pairs(mail.settings) do
+        if data.group == mail.selected_idxs.settings_group[name] then
+            table.insert(ordered_settings, setting)
+        end
+    end
+    table.sort(ordered_settings, function(a, b) return mail.settings[a].index < mail.settings[b].index end)
+    for _, setting in pairs(ordered_settings) do
+        local data = mail.settings[setting]
+        y = y + 0.4
+        local field_default = mail.selected_idxs[setting][name]
+        if field_default == nil then field_default = mail.get_setting(name, setting) end
+        if data.type == "bool" then
+            formspec = formspec .. [[
+            checkbox[]] .. x .. "," .. y .. ";" .. setting .. ";" ..
+            data.label .. ";" .. tostring(field_default) .. [[]
+            ]]
+            if data.tooltip then
+                formspec = formspec .. [[
+                tooltip[]] .. setting .. ";" .. data.tooltip .. [[]
+                ]]
+            end
+        elseif data.type == "string" then
+            y = y + 1
+            formspec = formspec .. [[
+            field[]] .. x+0.275 .. "," .. y .. ";3,0.5;" .. setting .. ";" .. data.label .. [[;]] ..
+            field_default .. [[]
+            ]]
+            if data.tooltip then
+                formspec = formspec .. "tooltip[" .. setting .. ";" .. data.tooltip .. "]"
+            end
+            if data.dataset then
+                local formatted_dataset = table.copy(data.dataset)
+                if data.format then
+                    for i, d in ipairs(formatted_dataset) do
+                        formatted_dataset[i] = data.format(d)
+                    end
+                end
+                local dataset_str = table.concat(formatted_dataset, ",")
+                local dataset_selected_id = 1
+                for i, d in ipairs(data.dataset) do
+                    if d == field_default then
+                        dataset_selected_id = i
+                        break
+                    end
+                end
+                formspec = formspec .. [[
+                dropdown[]] .. x+3 .. "," .. y-0.45 .. ";3,0.5;" .. "dataset_" .. setting .. ";" ..
+                dataset_str .. [[;]] .. dataset_selected_id .. [[;true]
+                ]]
+            end
+        elseif data.type == "number" then
+            y = y + 1
+            formspec = formspec .. [[
+            field[]] .. x+0.275 .. "," .. y .. ";3,0.5;" .. setting .. ";" .. data.label .. [[;]] ..
+            tostring(field_default) .. [[]
+            ]]
+            if data.tooltip then
+                formspec = formspec .. "tooltip[" .. setting .. ";" .. data.tooltip .. "]"
+            end
+            if data.dataset then
+                local formatted_dataset = table.copy(data.dataset)
+                if data.format then
+                    for i, d in ipairs(formatted_dataset) do
+                        formatted_dataset[i] = data.format(d)
+                    end
+                end
+                local dataset_str = table.concat(formatted_dataset, ",")
+                local dataset_selected_id = 1
+                for i, d in ipairs(data.dataset) do
+                    if d == field_default then
+                        dataset_selected_id = i
+                        break
+                    end
+                end
+                formspec = formspec .. [[
+                dropdown[]] .. x+3 .. "," .. y-0.45 .. ";3,0.5;" .. "dataset_" .. setting .. ";" ..
+                dataset_str .. [[;]] .. dataset_selected_id .. [[;true]
+                ]]
+            end
+        elseif data.type == "index" then
+            y = y + 0.2
+            local formatted_dataset = table.copy(data.dataset)
+            if data.format then
+                for i, d in ipairs(formatted_dataset) do
+                    formatted_dataset[i] = data.format(d)
+                end
+            end
+            local dataset_str = table.concat(formatted_dataset, ",")
+            local dataset_selected_id = field_default
+            formspec = formspec .. [[
+            label[]] .. x .. "," .. y .. ";" .. data.label .. "]"
+            y = y + 0.4
+            formspec = formspec .. [[
+            dropdown[]] .. x .. "," .. y .. ";3,0.5;" .. setting .. ";" ..
+            dataset_str .. [[;]] .. dataset_selected_id .. [[;true]
+            ]]
+            if data.tooltip then
+                formspec = formspec .. [[
+                tooltip[]] .. setting .. ";" .. data.tooltip .. [[]
+                ]]
+            end
+            y = y + 0.2
+        elseif data.type == "list" then
+            y = y + 0.3
+            formspec = formspec .. [[
+            tablecolumns[color;text]
+            table[]] .. x-0.0125 .. "," .. y .. ";3.8125,2.5;" .. setting .. ";" ..
+            mail.get_color("header") .. "," .. data.label .. ",," ..
+            table.concat(field_default, ",,") .. "]"
 
-            button[0,5.5;2.5,0.5;save;]] .. S("Save") .. [[]
-            button[2.7,5.5;2.5,0.5;reset;]] .. S("Reset") .. [[]
-            ]] .. mail.theme
+            y = y + 3.1
+            formspec = formspec .. [[
+            field[]] .. x+0.275 .. "," .. y .. ";2.975,0.5;field_" .. setting .. [[;;]
+            button[]] .. x+2.75 .. "," .. y-0.325 .. ";0.75,0.5;add_" .. setting .. [[;+]
+            button[]] .. x+3.25 .. "," .. y-0.325 .. ";0.75,0.5;remove_" .. setting .. [[;-]
+            ]]
 
+            if data.tooltip then
+                formspec = formspec .. "tooltip[field_" .. setting .. ";" .. data.tooltip .. "]"
+            end
+
+            y = y - 0.4
+        end
+    end
+    formspec = formspec .. mail.theme
 	minetest.show_formspec(name, FORMNAME, formspec)
 end
 
@@ -54,10 +194,48 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
     local playername = player:get_player_name()
 
+    for setting, data in pairs(mail.settings) do
+        if fields[setting] or fields["add_" .. setting] or fields["remove_" .. setting] then
+            if data.type == "bool" then
+                mail.selected_idxs[setting][playername] = fields[setting] == "true"
+                break
+            elseif data.type == "string" then
+                if data.dataset and fields["dataset_" .. setting] then
+                    mail.selected_idxs[setting][playername] = data.dataset[tonumber(fields["dataset_" .. setting])]
+                    mail.show_settings(playername)
+                end
+            elseif data.type == "number" then
+                if data.dataset and fields["dataset_" .. setting] then
+                    mail.selected_idxs[setting][playername] = data.dataset[tonumber(fields["dataset_" .. setting])]
+                    mail.show_settings(playername)
+                end
+            elseif data.type == "index" then
+                mail.selected_idxs[setting][playername] = tonumber(fields[setting])
+            elseif data.type == "list" then
+                mail.selected_idxs[setting][playername] = mail.selected_idxs[setting][playername] or
+                mail.get_setting(playername, setting)
+                if fields[setting] then
+                    local evt = minetest.explode_table_event(fields[setting])
+                    mail.selected_idxs["index_" .. setting][playername] = evt.row-1
+                elseif fields["add_" .. setting] then
+                    table.insert(mail.selected_idxs[setting][playername], fields["field_" .. setting])
+                elseif fields["remove_" .. setting] and mail.selected_idxs["index_" .. setting][playername] then
+                    table.remove(mail.selected_idxs[setting][playername],
+                    mail.selected_idxs["index_" .. setting][playername])
+                end
+                mail.show_settings(playername)
+            end
+        end
+    end
+
 	if fields.back then
 		mail.show_mail_menu(playername)
 		return
 
+    elseif fields.groups then
+        local evt = minetest.explode_table_event(fields.groups)
+        mail.selected_idxs.settings_group[playername] = mail.settings_groups[tonumber(evt.row)].name
+        mail.show_settings(playername)
     elseif fields.optionstab == "1" then
         mail.selected_idxs.optionstab[playername] = 1
 
@@ -66,41 +244,14 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
         mail.show_about(playername)
         return
 
-    elseif fields.chat_notifications then
-        mail.selected_idxs.chat_notifications[playername] = fields.chat_notifications == "true"
-
-    elseif fields.onjoin_notifications then
-        mail.selected_idxs.onjoin_notifications[playername] = fields.onjoin_notifications == "true"
-
-    elseif fields.hud_notifications then
-        mail.selected_idxs.hud_notifications[playername] = fields.hud_notifications == "true"
-
-    elseif fields.sound_notifications then
-        mail.selected_idxs.sound_notifications[playername] = fields.sound_notifications == "true"
-
-    elseif fields.unreadcolorenable then
-        mail.selected_idxs.unreadcolorenable[playername] = fields.unreadcolorenable == "true"
-
-    elseif fields.cccolorenable then
-        mail.selected_idxs.cccolorenable[playername] = fields.cccolorenable == "true"
-
-    elseif fields.trash_move_enable then
-        mail.selected_idxs.trash_move_enable[playername] = fields.trash_move_enable == "true"
-
     elseif fields.save then
-        -- checkboxes
-        mail.set_setting(playername, "chat_notifications", mail.selected_idxs.chat_notifications[playername])
-        mail.set_setting(playername, "onjoin_notifications", mail.selected_idxs.onjoin_notifications[playername])
-        mail.set_setting(playername, "hud_notifications", mail.selected_idxs.hud_notifications[playername])
-        mail.set_setting(playername, "sound_notifications", mail.selected_idxs.sound_notifications[playername])
-        mail.set_setting(playername, "unreadcolorenable", mail.selected_idxs.unreadcolorenable[playername])
-        mail.set_setting(playername, "cccolorenable", mail.selected_idxs.cccolorenable[playername])
-        mail.set_setting(playername, "trash_move_enable", mail.selected_idxs.trash_move_enable[playername])
-        -- dropdowns
-        local defaultsortfield = fields.defaultsortfield or mail.get_setting("defaultsortfield")
-        local defaultsortdirection = fields.defaultsortdirection or mail.get_setting("defaultsortdirection")
-        mail.set_setting(playername, "defaultsortfield", tonumber(defaultsortfield))
-        mail.set_setting(playername, "defaultsortdirection", tonumber(defaultsortdirection))
+        -- save settings
+        for setting, _ in pairs(mail.settings) do
+            local new_value = mail.selected_idxs[setting][playername]
+            mail.selected_idxs[setting][playername] = nil
+            if new_value == nil then new_value = mail.get_setting(playername, setting) end
+            mail.set_setting(playername, setting, new_value)
+        end
         -- update visuals
         mail.hud_update(playername, mail.get_storage_entry(playername).inbox)
         mail.show_settings(playername)

ui/trash.lua

@@ -1,7 +1,7 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
-local trash_formspec = "size[8.5,10;]" .. mail.theme .. [[
+local trash_formspec = "size[8.5,11;]" .. mail.theme .. [[
 	tabheader[0.3,1;boxtab;]] ..
 	S("Inbox") .. "," .. S("Outbox").. "," .. S("Drafts") .. "," .. S("Trash") .. [[;4;false;false]
 
@@ -10,13 +10,13 @@ local trash_formspec = "size[8.5,10;]" .. mail.theme .. [[
 	button[6,1.70;2.5,0.5;restore;]] .. S("Restore") .. [[]
 	button[6,2.45;2.5,0.5;delete;]] .. S("Delete") .. [[]
 	button[6,3.20;2.5,0.5;empty;]] .. S("Empty") .. [[]
-	button[6,6.8;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
-	button[6,7.6;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
-	button[6,8.7;2.5,0.5;options;]] .. S("Options") .. [[]
-	button_exit[6,9.5;2.5,0.5;quit;]] .. S("Close") .. [[]
+	button[6,8.0;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+	button[6,8.8;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+	button[6,9.7;2.5,0.5;options;]] .. S("Options") .. [[]
+	button_exit[6,10.5;2.5,0.5;quit;]] .. S("Close") .. [[]
 
 	tablecolumns[color;text;text]
-	table[0,0.7;5.75,9.35;trash;#999,]] .. S("From/To") .. "," .. S("Subject")
+	table[0,0.7;5.75,10.35;trash;]] .. mail.get_color("header") .. "," .. S("From/To") .. "," .. S("Subject")
 
 
 function mail.show_trash(name)

util/colors.lua

@@ -0,0 +1,58 @@
+local generic_colors = {
+	header         = "#999999",
+	selected       = "#72FF63",
+	important      = "#FFD700",
+	additional     = "#CCCCDD",
+	highlighted    = "#608631",
+	new            = "#00F529",
+	warning        = "#FF8800",
+	disabled       = "#332222",
+	muted          = "#CCCCCC",
+}
+
+local function get_base_color(c)
+    return generic_colors[c] or ""
+end
+
+local function hex2rgb(hex)
+    hex = hex:gsub("#","")
+    return {
+        r = tonumber("0x" .. hex:sub(1,2)),
+        g = tonumber("0x" .. hex:sub(3,4)),
+        b = tonumber("0x" .. hex:sub(5,6))
+    }
+end
+
+local function rgb2hex(rgb)
+    return "#" .. string.format("%x", rgb.r) .. string.format("%x", rgb.g) .. string.format("%x", rgb.b)
+end
+
+local function rgb_colors_mix(colors)
+    local R = 0
+    local G = 0
+    local B = 0
+    for _, c in ipairs(colors) do
+        R = R + c.r
+        G = G + c.g
+        B = B + c.b
+    end
+    R = math.floor(R / #colors + 0.5)
+    G = math.floor(G / #colors + 0.5)
+    B = math.floor(B / #colors + 0.5)
+    return {r=R,g=G,b=B}
+end
+
+function mail.get_color(mix)
+    if type(mix) == "string" then
+        return get_base_color(mix)
+    elseif #mix == 1 then
+        return get_base_color(mix[1])
+    else
+        local colors2mix = {}
+        for _, c in ipairs(mix) do
+            colors2mix[#colors2mix+1] = hex2rgb(get_base_color(c))
+        end
+        local mixed_color = rgb_colors_mix(colors2mix)
+        return rgb2hex(mixed_color)
+    end
+end

util/contact.lua

@@ -1,3 +1,5 @@
+-- translation
+local S = mail.S
 
 function mail.compile_contact_list(name, selected, playernames)
 	-- TODO: refactor this - not just compiles *a* list, but *the* list for the contacts screen (too inflexible)
@@ -6,7 +8,7 @@ function mail.compile_contact_list(name, selected, playernames)
 
 	if playernames == nil then
 		local length = 0
-		for k, contact, i, l in mail.pairsByKeys(contacts) do
+		for k, contact, i, l in mail.pairs_by_keys(contacts) do
 			if i == 1 then length = l end
 			formspec[#formspec + 1] = ","
 			formspec[#formspec + 1] = ","
@@ -32,7 +34,7 @@ function mail.compile_contact_list(name, selected, playernames)
 			end
 			formspec[#formspec + 1] = "]"
 		else
-			formspec[#formspec + 1] = "]label[2,4.5;No contacts]"
+			formspec[#formspec + 1] = "]label[2,4.5;" .. S("No contacts") .. "]"
 		end
 	else
 		if type(playernames) == "string" then

util/init.lua

@@ -0,0 +1,9 @@
+-- sub files
+local MP = minetest.get_modpath(minetest.get_current_modname())
+dofile(MP .. "/util/normalize.lua")
+dofile(MP .. "/util/colors.lua")
+dofile(MP .. "/util/contact.lua")
+dofile(MP .. "/util/settings.lua")
+dofile(MP .. "/util/spam.lua")
+dofile(MP .. "/util/time_ago.lua")
+dofile(MP .. "/util/uuid.lua")

util/normalize.lua

@@ -1,18 +1,44 @@
-local has_canonical_name = minetest.get_modpath("canonical_name")
+-- translation
+local S = mail.S
+
+local function recursive_expand_recipient_names(sender, list, is_toplevel, recipients, undeliverable)
+    for _, name in ipairs(list) do
+        if not (recipients[name] or undeliverable[name] or (name == sender and not is_toplevel)) then
+            local succ, value
+            for _, handler in ipairs(mail.registered_recipient_handlers) do
+                succ, value = handler(sender, name)
+                if succ ~= nil then
+                    break
+                end
+            end
+            local vtp = type(value)
+            if succ then
+                if vtp == "string" then
+                    recursive_expand_recipient_names(sender, {value}, is_toplevel, recipients, undeliverable)
+                elseif vtp == "table" then
+                    recursive_expand_recipient_names(sender, value, false, recipients, undeliverable)
+                elseif vtp == "function" then
+                    recipients[name] = value
+                else
+                    undeliverable[name] = S("The method of delivery to @1 is invalid.", name)
+                end
+            elseif succ == nil then
+                undeliverable[name] = S("The recipient @1 could not be identified.", name)
+            else
+                local reason = tostring(value) or S("@1 rejected your mail.", name)
+                undeliverable[name] = reason
+            end
+        end
+    end
+end
 
 --[[
 return the field normalized (comma separated, single space)
 and add individual player names to recipient list
 --]]
-function mail.normalize_players_and_add_recipients(field, recipients, undeliverable)
+function mail.normalize_players_and_add_recipients(sender, field, recipients, undeliverable)
     local order = mail.parse_player_list(field)
-    for _, recipient_name in ipairs(order) do
-        if not minetest.player_exists(recipient_name) then
-            undeliverable[recipient_name] = true
-        else
-            recipients[recipient_name] = true
-        end
-    end
+    recursive_expand_recipient_names(sender, order, true, recipients, undeliverable)
     return mail.concat_player_list(order)
 end
 
@@ -21,29 +47,23 @@ function mail.parse_player_list(field)
         return {}
     end
 
-    local separator = ", "
+    local separator = ",%s"
     local pattern = "([^" .. separator .. "]+)"
 
     -- get individual players
-    local player_set = {}
     local order = {}
-    field:gsub(pattern, function(player_name)
-        local lower = string.lower(player_name)
-        if not player_set[lower] then
-            if has_canonical_name then
-                player_name = canonical_name.get(player_name) or player_name
+    for name in field:gmatch(pattern) do
+        table.insert(order, name)
     end
 
-            player_set[lower] = player_name
-            order[#order+1] = player_name
-        end
-    end)
-
     return order
 end
 
 function mail.concat_player_list(order)
     -- turn list of players back into normalized string
+    if order == nil or #order == 0 then
+        return ""
+    end
     return table.concat(order, ", ")
 end
 

util/normalize.spec.lua

@@ -2,7 +2,7 @@
 mtt.register("util/normalize_players_and_add_recipients", function(callback)
     local recipients = {}
     local undeliverable = {}
-    local to = mail.normalize_players_and_add_recipients("player1,player2", recipients, undeliverable)
+    local to = mail.normalize_players_and_add_recipients("sender", "player1,player2", recipients, undeliverable)
 
     assert(to == "player1, player2")
     assert(not next(undeliverable))

util/settings.lua

@@ -0,0 +1,113 @@
+-- translation
+local S = mail.S
+
+mail.settings = {
+    chat_notifications = {
+        type = "bool", default = true, group = "notifications", index = 1,
+        label = S("Chat notifications"), tooltip = S("Receive a message in the chat when there is a new message")
+    },
+    onjoin_notifications = {
+        type = "bool", default = true, group = "notifications", index = 2,
+        label = S("On join notifications"), tooltip = S("Receive a message at login when inbox isn't empty") },
+    hud_notifications = {
+        type = "bool", default = true, group = "notifications", index = 3,
+        label = S("HUD notifications"), tooltip = S("Show an HUD notification when inbox isn't empty")
+    },
+    sound_notifications = {
+        type = "bool", default = true, group = "notifications", index = 4,
+        label = S("Sound notifications"), tooltip = S("Play a sound when there is a new message")
+    },
+    unreadcolorenable = {
+        type = "bool", default = true, group = "message_list", index = 1,
+        label = S("Show unread in different color")
+    },
+    cccolorenable = {
+        type = "bool", default = true, group = "message_list", index = 2,
+        label = S("Show CC/BCC in different color")
+    },
+    defaultsortfield = {
+        type = "index", default = 3, group = "box_fields", index = 1,
+        label = S("Default sorting field"), dataset = { S("From/To"), S("Subject"), S("Date") }
+    },
+    defaultsortdirection = {
+        type = "index", default = 1, group = "box_fields", index = 2,
+        label = S("Default sorting direction"), dataset = { S("Ascending"), S("Descending") }
+    },
+    trash_move_enable = {
+        type = "bool", default = true, group = "other", index = 1,
+        label = S("Move deleted messages to trash")
+    },
+    auto_marking_read = {
+        type = "bool", default = true, group = "other", index = 2,
+        label = S("Automatic marking read"), tooltip = S("Mark a message as read when opened")
+    },
+    date_format = {
+        type = "string", default = "%Y-%m-%d %X", group = "date_and_time", index = 3, label = S("Date format"),
+        dataset = {"%Y-%m-%d %X", "%d/%m/%y %X", "%A %d %B %Y %X"}, format = os.date
+    },
+    timezone_offset = {
+        type = "number", default = 0, group = "date_and_time", index = 4,
+        label = S("Timezone offset"), tooltip = S("Offset to add to server time."),
+    },
+    mute_list = {
+        type = "list", default = {}, group = "spam", index = 1,
+        label = S("Mute list")
+    },
+}
+
+mail.settings_groups = {
+    { name = "notifications", label = S("Notifications"), index = 1, parent = 0},
+    { name = "message_list",  label = S("Message list"),  index = 2, parent = 0},
+    { name = "box_fields",    label = S("Fields"),        index = 1, parent = "message_list"},
+    { name = "spam",          label = S("Spam"),          index = 3, parent = 0},
+    { name = "other",         label = S("Other"),         index = 4, parent = 0},
+    { name = "date_and_time", label = S("Date and Time"), index = 1, parent = "other"}
+}
+
+for s, d in pairs(mail.settings) do
+	mail.selected_idxs[s] = {}
+	if d.type == "list" then
+        mail.selected_idxs["index_" .. s] = {}
+    end
+end
+
+function mail.settings.mute_list.check(name, value)
+    local valid_players = {}
+    for _, p in ipairs(value) do
+        if p ~= name and minetest.player_exists(p) then
+            table.insert(valid_players, p)
+        end
+    end
+    return valid_players
+end
+
+function mail.settings.mute_list.sync(name)
+    if minetest.get_modpath("beerchat") then
+        local players = {}
+        for other_player, _ in minetest.get_auth_handler().iterate() do
+            if beerchat.has_player_muted_player(name, other_player) then
+                table.insert(players, other_player)
+            end
+        end
+        return players
+    end
+    return nil
+end
+
+function mail.settings.mute_list.transfer(name, value)
+    if minetest.get_modpath("beerchat") then
+        for other_player, _ in minetest.get_auth_handler().iterate() do -- unmute all
+            if not beerchat.execute_callbacks("before_mute", name, other_player) then
+                return false
+            end
+            minetest.get_player_by_name(name):get_meta():set_string(
+				"beerchat:muted:" .. other_player, "")
+        end
+        for _, other_player in ipairs(value) do -- then mute only players in table
+            minetest.get_player_by_name(name):get_meta():set_string(
+                    "beerchat:muted:" .. other_player, "true")
+        end
+        return true
+    end
+    return nil
+end

util/spam.lua

@@ -0,0 +1,39 @@
+local function caps_ratio(str)
+    local total_caps = 0
+    for i = 1, #str do -- iteration through each character
+        local c = str:sub(i,i)
+        if string.lower(c) ~= c then -- do not count digits as spam
+            total_caps = total_caps + 1
+        end
+    end
+    return total_caps/(#str or 1) -- avoid division by zero
+end
+
+local function words_ratio(str, ratio)
+    local words = {}
+    local split_str = str:split(" ")
+    for _, w in ipairs(split_str) do
+        if not words[w] then
+            words[w] = 0
+        else
+            words[w] = (words[w] or 0) + 1
+        end
+    end
+    for _, n in pairs(words) do
+        if n/#split_str >= ratio then
+            return true
+        end
+    end
+    return false
+end
+
+function mail.check_spam(message)
+    local spam_checks = {}
+    if caps_ratio(message.subject) == 1 or caps_ratio(message.body) > 0.4 then
+        table.insert(spam_checks, "caps")
+    end
+    if words_ratio(message.subject, 0.6) or words_ratio(message.body, 0.2) then
+        table.insert(spam_checks, "words")
+    end
+    return spam_checks
+end

util/time_ago.lua

@@ -0,0 +1,29 @@
+-- translation
+local S = mail.S
+
+function mail.time_ago(t)
+    local elapsed = os.time() - t
+    local str = ""
+
+    local time_units = {
+    { S("years"), 31536000 },
+    { S("months"), 2592000 },
+    { S("weeks"), 604800 },
+    { S("days"), 86400 },
+    { S("hours"), 3600 },
+    { S("minuts"), 60 },
+    { S("seconds"), 1 },
+    }
+
+    for _, u in ipairs(time_units) do
+        local n = math.modf(elapsed/u[2])
+        if n > 0 then
+            str = str .. " " .. n .. " " .. u[1]
+            elapsed = elapsed - n * u[2]
+        end
+    end
+
+    str = string.sub(str, 2, -1)
+
+    return S("@1 ago", str)
+end