99 lines
2.3 KiB
Lua
99 lines
2.3 KiB
Lua
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datastorage = {data = {}}
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local DIR_DELIM = DIR_DELIM or "/"
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local data_path = minetest.get_worldpath()..DIR_DELIM.."datastorage"..DIR_DELIM
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function datastorage.save(id)
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local data = datastorage.data[id]
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-- Check if the container is empty
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if not data or not next(data) then return end
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for _, sub_data in pairs(data) do
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if not next(sub_data) then return end
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end
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local file = io.open(data_path..id, "w")
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if not file then
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-- Most likely the data directory doesn't exist, create it
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-- and try again.
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if minetest.mkdir then
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minetest.mkdir(data_path)
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else
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-- Using os.execute like this is not very platform
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-- independent or safe, but most platforms name their
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-- directory creation utility mkdir, the data path is
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-- unlikely to contain special characters, and the
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-- data path is only mutable by the admin.
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os.execute('mkdir "'..data_path..'"')
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end
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file = io.open(data_path..id, "w")
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if not file then return end
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end
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local datastr = minetest.serialize(data)
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if not datastr then return end
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file:write(datastr)
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file:close()
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return true
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end
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function datastorage.load(id)
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local file = io.open(data_path..id, "r")
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if not file then return end
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local data = minetest.deserialize(file:read("*all"))
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datastorage.data[id] = data
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file:close()
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return data
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end
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-- Compatability
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function datastorage.get_container(player, id)
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return datastorage.get(player:get_player_name(), id)
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end
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-- Retrieves a value from the data storage
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function datastorage.get(id, ...)
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local last = datastorage.data[id]
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if last == nil then last = datastorage.load(id) end
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if last == nil then
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last = {}
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datastorage.data[id] = last
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end
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local cur = last
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for _, sub_id in ipairs({...}) do
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last = cur
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cur = cur[sub_id]
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if cur == nil then
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cur = {}
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last[sub_id] = cur
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end
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end
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return cur
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end
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-- Saves a container and reomves it from memory
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function datastorage.finish(id)
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datastorage.save(id)
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datastorage.data[id] = nil
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end
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-- Compatability
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function datastorage.save_container(player)
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return datastorage.save(player:get_player_name())
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end
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minetest.register_on_leaveplayer(function(player)
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local player_name = player:get_player_name()
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datastorage.save(player_name)
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datastorage.data[player_name] = nil
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end)
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minetest.register_on_shutdown(function()
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for id in pairs(datastorage.data) do
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datastorage.save(id)
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end
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end)
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