mirror of
https://github.com/joe7575/tubelib2.git
synced 2024-07-15 12:19:34 +02:00
102 lines
2.4 KiB
Lua
102 lines
2.4 KiB
Lua
--[[
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Tube Library 2
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==============
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Copyright (C) 2017-2018 Joachim Stolberg
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LGPLv2.1+
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See LICENSE.txt for more information
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storage.lua
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]]--
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--
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-- Data maintenance
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--
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local MemStore = {}
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local storage = minetest.get_mod_storage()
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local function update_mod_storage()
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local gametime = minetest.get_gametime()
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for k,v in pairs(MemStore) do
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if v.used then
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v.used = false
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v.best_before = gametime + 10
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storage:set_string(k, minetest.serialize(v))
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elseif v.best_before < gametime then
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storage:set_string(k, minetest.serialize(v))
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MemStore[k] = nil -- remove from memory
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end
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end
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-- run every minute
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minetest.after(60, update_mod_storage)
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end
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minetest.register_on_shutdown(function()
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for k,v in pairs(MemStore) do
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storage:set_string(k, minetest.serialize(v))
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end
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end)
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minetest.after(60, update_mod_storage)
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--
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-- Local helper functions
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--
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local function new_block(block_key)
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local data = storage:get_string(block_key)
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if data == nil or data == "" then -- TODO: change for v5
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MemStore[block_key] = {}
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else
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MemStore[block_key] = minetest.deserialize(data)
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end
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return MemStore[block_key]
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end
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local function new_node(block, node_key)
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block[node_key] = {}
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return block[node_key]
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end
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local function unlock(pos)
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local block_key = math.floor((pos.z+32768)/16)*4096*4096 +
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math.floor((pos.y+32768)/16)*4096 + math.floor((pos.x+32768)/16)
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local node_key = (pos.z%16)*16*16 + (pos.y%16)*16 + (pos.x%16)
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local block = MemStore[block_key] or new_block(block_key)
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block.used = true
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return block, node_key
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end
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-------------------------------------------------------------------------------
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-- API functions for a node related and high efficient storage table
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-- for all kind of node data.
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-------------------------------------------------------------------------------
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-- To be called when a node is placed
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function tubelib2.init_mem(pos)
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local block, node_key = unlock(pos)
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return new_node(block, node_key)
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end
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-- To get the node data table
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function tubelib2.get_mem(pos)
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local block, node_key = unlock(pos)
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return block[node_key] or new_node(block, node_key)
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end
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-- To be called when a node is removed
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function tubelib2.del_mem(pos)
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local block, node_key = unlock(pos)
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block[node_key] = nil
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end
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-- Read a value, or return the default value if not available
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function tubelib2.get_mem_data(pos, key, default)
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return tubelib2.get_mem(pos)[key] or default
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end
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