89 lines
1.9 KiB
Lua
89 lines
1.9 KiB
Lua
--[[
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TechAge
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=======
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Copyright (C) 2019-2024 Joachim Stolberg
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AGPL v3
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See LICENSE.txt for more information
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Packing functions
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]]--
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-- for lazy programmers
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local P2S = function(pos) if pos then return minetest.pos_to_string(pos) end end
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local M = minetest.get_meta
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-- string/usercode conversion
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local function usercode_to_string(tbl)
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if tbl and tbl.inventory then
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for list_name,list in pairs(tbl.inventory) do
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for i,item in ipairs(list) do
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tbl.inventory[list_name][i] = item:to_string()
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end
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end
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end
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end
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local function string_to_usercode(tbl)
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if tbl and tbl.inventory then
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for list_name,list in pairs(tbl.inventory) do
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for i,item in ipairs(list) do
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tbl.inventory[list_name][i] = ItemStack(item)
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end
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end
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end
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end
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-- pack/unpack node nvm data
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local function pack_nvm(pos)
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if techage.has_nvm(pos) then
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local s = minetest.serialize(techage.get_nvm(pos))
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techage.del_mem(pos)
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return s
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end
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end
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local function unpack_nvm(pos, s)
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if s and s ~= "" then
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local tbl = minetest.deserialize(s)
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local nvm = techage.get_nvm(pos)
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for k,v in pairs(tbl) do
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nvm.k = v
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end
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end
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end
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-- pack/unpack node metedata
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local function pack_meta(pos)
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local tbl = M(pos):to_table() or {}
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usercode_to_string(tbl)
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return minetest.serialize(tbl)
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end
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local function unpack_meta(pos, s)
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if s and s ~= "" then
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local tbl = minetest.deserialize(s) or {}
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string_to_usercode(tbl)
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M(pos):from_table(tbl)
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end
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end
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-------------------------------------------------------------------------------
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-- preserve/restore API functions
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-------------------------------------------------------------------------------
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function techage.preserve_nodedata(pos)
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local smeta = pack_meta(pos)
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local snvm = pack_nvm(pos)
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return minetest.serialize({smeta = smeta, snvm = snvm})
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end
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function techage.restore_nodedata(pos, s)
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local tbl = minetest.deserialize(s) or {}
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unpack_nvm(pos, tbl.snvm)
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unpack_meta(pos, tbl.smeta)
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end
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