From 8318771e068792d6b2d0db9ebb96987aeaa9ef95 Mon Sep 17 00:00:00 2001
From: Aleksandr Avdeev <reload-gtn@mail.ru>
Date: Sun, 21 Jan 2024 01:18:46 +0500
Subject: [PATCH] Initial commit

---
 depends.txt              |  1 +
 description.txt          |  1 +
 init.lua                 | 82 ++++++++++++++++++++++++++++++++++++++++
 locale/player_spam.ru.tr |  7 ++++
 mod.conf                 |  1 +
 5 files changed, 92 insertions(+)
 create mode 100644 depends.txt
 create mode 100644 description.txt
 create mode 100644 init.lua
 create mode 100644 locale/player_spam.ru.tr
 create mode 100644 mod.conf

diff --git a/depends.txt b/depends.txt
new file mode 100644
index 0000000..21c2521
--- /dev/null
+++ b/depends.txt
@@ -0,0 +1 @@
+default?
\ No newline at end of file
diff --git a/description.txt b/description.txt
new file mode 100644
index 0000000..2420e02
--- /dev/null
+++ b/description.txt
@@ -0,0 +1 @@
+Kick player for chat flood
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..682fb46
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,82 @@
+local S = minetest.get_translator("player_spam")
+ 
+local player_spam = {}
+local CHAR_REPEAT_MAX = 3 -- максимально допустимое число повторяющихся символов
+ 
+minetest.register_on_chat_message(function(name, msg)
+    if msg == "" or msg:sub(1, 1) == '/' then
+        return
+    end
+    if not minetest.check_player_privs(name, {shout = true}) then
+        minetest.chat_send_player(name, S("You can not chat. Missing privilege: shout"))
+        return true
+    end
+ 
+    -- накапливаем счетчик, минимальное значение увеличения любого сообщения - 1, для длинных сообщений будет выше
+    local count_as_messages = math.max(1, math.min(msg:len() / 100, 3))
+    player_spam[name] = (player_spam[name] or 0) + math.floor(count_as_messages + 0.5) 
+ 
+    -- кик, если выше трёх за интервал
+    if player_spam[name] > 3 then
+        minetest.kick_player(name, S("You spammer you!"))
+        return true
+    end
+    -- предупреждение в чат игроку, если выше двух за интервал
+    if player_spam[name] > 2 then
+        minetest.chat_send_player(name, S("Your message was not sent due to flood detection. ")..
+                S("Please try again in some seconds."))
+        return true
+    end
+ 
+    local new_msg = ""
+    local last_char
+    local same_char_count = 0
+ 
+    -- Усечение повторяющихся символов в сообщении до ограничения CHAR_REPEAT_MAX
+    for c in msg:gmatch(".") do
+        if c:byte() < 0x20 then
+            c = ' '
+        end
+        if last_char == c:lower() then
+            same_char_count = same_char_count + 1
+        else
+            last_char = c:lower()
+            same_char_count = 0
+        end
+ 
+        if same_char_count < CHAR_REPEAT_MAX then
+            new_msg = new_msg .. c
+        end
+    end
+    if new_msg == msg then
+        return
+    end
+  
+    minetest.chat_send_all("<"..name.."> " .. new_msg)
+
+    return true
+end)
+ 
+local timed = 0
+-- сброс счетчиков сообщений пользователей за интервал CHECK_COUNT
+local CHECK_COUNT = 8
+minetest.register_globalstep(function(dtime)
+    timed = timed + dtime
+    if timed < CHECK_COUNT then
+        return
+    end
+    timed = 0
+ 
+    for i, player in pairs(minetest.get_connected_players()) do
+        local player_name = player:get_player_name()
+        local num = player_spam[player_name]
+        if num and num > 0 then
+            player_spam[player_name] = math.max(0, num - CHECK_COUNT)
+        end
+    end
+end)
+ 
+-- очистка поля спама при выходе игрока
+minetest.register_on_leaveplayer(function(player)
+    player_spam[player:get_player_name()] = nil
+end)
\ No newline at end of file
diff --git a/locale/player_spam.ru.tr b/locale/player_spam.ru.tr
new file mode 100644
index 0000000..30133e6
--- /dev/null
+++ b/locale/player_spam.ru.tr
@@ -0,0 +1,7 @@
+# textdomain: player_spam
+
+You can not chat. Missing privilege: shout=Вы не можете общаться в чате. Отсутствующая привилегия: shout
+You spammer you!=Вы спамер!
+Your message was not sent due to flood detection. =Ваше сообщение не было отправлено из-за обнаружения флуда. 
+Please try again in some seconds.=Пожалуйста, повторите попытку через несколько секунд.
+Your message was shortened a bit to prevent from spam.=Ваше сообщение было немного сокращено для защиты от спама.
\ No newline at end of file
diff --git a/mod.conf b/mod.conf
new file mode 100644
index 0000000..2f7ef93
--- /dev/null
+++ b/mod.conf
@@ -0,0 +1 @@
+name = player_spam