1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
datastorage = {data = {}}
local DIR_DELIM = DIR_DELIM or "/"
local data_path = minetest.get_worldpath()..DIR_DELIM.."datastorage"..DIR_DELIM
function datastorage.save(id)
local data = datastorage.data[id]
-- Check if the container is empty
if not data or not next(data) then return end
for _, sub_data in pairs(data) do
if not next(sub_data) then return end
end
local file = io.open(data_path..id, "w")
if not file then
-- Most likely the data directory doesn't exist, create it
-- and try again.
if minetest.mkdir then
minetest.mkdir(data_path)
else
-- Using os.execute like this is not very platform
-- independent or safe, but most platforms name their
-- directory creation utility mkdir, the data path is
-- unlikely to contain special characters, and the
-- data path is only mutable by the admin.
os.execute('mkdir "'..data_path..'"')
end
file = io.open(data_path..id, "w")
if not file then return end
end
local datastr = minetest.serialize(data)
if not datastr then return end
file:write(datastr)
file:close()
return true
end
function datastorage.load(id)
local file = io.open(data_path..id, "r")
if not file then return end
local data = minetest.deserialize(file:read("*all"))
datastorage.data[id] = data
file:close()
return data
end
-- Compatability
function datastorage.get_container(player, id)
return datastorage.get(player:get_player_name(), id)
end
-- Retrieves a value from the data storage
function datastorage.get(id, ...)
local last = datastorage.data[id]
if last == nil then last = datastorage.load(id) end
if last == nil then
last = {}
datastorage.data[id] = last
end
local cur = last
for _, sub_id in ipairs({...}) do
last = cur
cur = cur[sub_id]
if cur == nil then
cur = {}
last[sub_id] = cur
end
end
return cur
end
-- Saves a container and reomves it from memory
function datastorage.finish(id)
datastorage.save(id)
datastorage.data[id] = nil
end
-- Compatability
function datastorage.save_container(player)
return datastorage.save(player:get_player_name())
end
minetest.register_on_leaveplayer(function(player)
local player_name = player:get_player_name()
datastorage.save(player_name)
datastorage.data[player_name] = nil
end)
minetest.register_on_shutdown(function()
for id in pairs(datastorage.data) do
datastorage.save(id)
end
end)
|
