author | Waqas Hussain <waqas20@gmail.com> |
Thu, 13 Nov 2008 12:10:42 +0500 | |
changeset 247 | 681b29aa134f |
parent 206 | e30d0e30a0ff |
child 267 | 6303b7454ad0 |
permissions | -rw-r--r-- |
0 | 1 |
local format = string.format; |
2 |
local setmetatable, type = setmetatable, type; |
|
247
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
3 |
local pairs, ipairs = pairs, ipairs; |
0 | 4 |
local char = string.char; |
5 |
local loadfile, setfenv, pcall = loadfile, setfenv, pcall; |
|
6 |
local log = log; |
|
7 |
local io_open = io.open; |
|
206
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
8 |
local os_remove = os.remove; |
88 | 9 |
local tostring = tostring; |
177
606c433955e7
Bug fixes and checks for presence subscriptions, etc
Waqas Hussain <waqas20@gmail.com>
parents:
129
diff
changeset
|
10 |
local error = error; |
206
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
11 |
local next = next; |
247
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
12 |
local t_insert = table.insert; |
0 | 13 |
|
182
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
14 |
local indent = function(f, i) |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
15 |
for n = 1, i do |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
16 |
f:write("\t"); |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
17 |
end |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
18 |
end |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
19 |
|
0 | 20 |
module "datamanager" |
21 |
||
22 |
||
23 |
---- utils ----- |
|
24 |
local encode, decode; |
|
25 |
||
26 |
local log = function (type, msg) return log(type, "datamanager", msg); end |
|
27 |
||
28 |
do |
|
29 |
local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end }); |
|
30 |
||
31 |
decode = function (s) |
|
32 |
return s and (s:gsub("+", " "):gsub("%%([a-fA-F0-9][a-fA-F0-9])", urlcodes)); |
|
33 |
end |
|
34 |
||
35 |
encode = function (s) |
|
36 |
return s and (s:gsub("%W", function (c) return format("%%%x", c:byte()); end)); |
|
37 |
end |
|
38 |
end |
|
39 |
||
40 |
local function basicSerialize (o) |
|
182
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
41 |
if type(o) == "number" or type(o) == "boolean" then |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
42 |
return tostring(o); |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
43 |
else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise. |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
44 |
return (format("%q", tostring(o)):gsub("\\\n", "\\n")); |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
45 |
end |
0 | 46 |
end |
47 |
||
48 |
||
182
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
49 |
local function simplesave (f, o, ind) |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
50 |
if type(o) == "number" then |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
51 |
f:write(o) |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
52 |
elseif type(o) == "string" then |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
53 |
f:write((format("%q", o):gsub("\\\n", "\\n"))) |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
54 |
elseif type(o) == "table" then |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
55 |
f:write("{\n") |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
56 |
for k,v in pairs(o) do |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
57 |
indent(f, ind); |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
58 |
f:write("[", basicSerialize(k), "] = ") |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
59 |
simplesave(f, v, ind+1) |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
60 |
f:write(",\n") |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
61 |
end |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
62 |
indent(f, ind-1); |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
63 |
f:write("}") |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
64 |
elseif type(o) == "boolean" then |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
65 |
f:write(o and "true" or "false"); |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
66 |
else |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
67 |
error("cannot serialize a " .. type(o)) |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
68 |
end |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
69 |
end |
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
70 |
|
0 | 71 |
------- API ------------- |
72 |
||
247
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
73 |
function getpath(username, host, datastore, ext) |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
74 |
ext = ext or "dat"; |
84
d0a0bac6815e
Added: Datastore support for hosts and global data in addition to users
Waqas Hussain <waqas20@gmail.com>
parents:
0
diff
changeset
|
75 |
if username then |
247
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
76 |
return format("data/%s/%s/%s.%s", encode(host), datastore, encode(username), ext); |
84
d0a0bac6815e
Added: Datastore support for hosts and global data in addition to users
Waqas Hussain <waqas20@gmail.com>
parents:
0
diff
changeset
|
77 |
elseif host then |
247
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
78 |
return format("data/%s/%s.%s", encode(host), datastore, ext); |
84
d0a0bac6815e
Added: Datastore support for hosts and global data in addition to users
Waqas Hussain <waqas20@gmail.com>
parents:
0
diff
changeset
|
79 |
else |
247
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
80 |
return format("data/%s.%s", datastore, ext); |
84
d0a0bac6815e
Added: Datastore support for hosts and global data in addition to users
Waqas Hussain <waqas20@gmail.com>
parents:
0
diff
changeset
|
81 |
end |
0 | 82 |
end |
83 |
||
84 |
function load(username, host, datastore) |
|
85 |
local data, ret = loadfile(getpath(username, host, datastore)); |
|
117
8e5c5e6a3240
Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents:
88
diff
changeset
|
86 |
if not data then |
182
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
87 |
log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
117
8e5c5e6a3240
Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents:
88
diff
changeset
|
88 |
return nil; |
8e5c5e6a3240
Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents:
88
diff
changeset
|
89 |
end |
0 | 90 |
setfenv(data, {}); |
91 |
local success, ret = pcall(data); |
|
117
8e5c5e6a3240
Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents:
88
diff
changeset
|
92 |
if not success then |
182
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
93 |
log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
117
8e5c5e6a3240
Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents:
88
diff
changeset
|
94 |
return nil; |
8e5c5e6a3240
Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents:
88
diff
changeset
|
95 |
end |
0 | 96 |
return ret; |
97 |
end |
|
98 |
||
99 |
function store(username, host, datastore, data) |
|
206
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
100 |
if not data then |
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
101 |
data = {}; |
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
102 |
end |
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
103 |
-- save the datastore |
0 | 104 |
local f, msg = io_open(getpath(username, host, datastore), "w+"); |
117
8e5c5e6a3240
Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents:
88
diff
changeset
|
105 |
if not f then |
182
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
106 |
log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
206
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
107 |
return; |
117
8e5c5e6a3240
Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents:
88
diff
changeset
|
108 |
end |
0 | 109 |
f:write("return "); |
182
f5cb6b5a6eb7
Datamanager Fixes and improvements
Waqas Hussain <waqas20@gmail.com>
parents:
177
diff
changeset
|
110 |
simplesave(f, data, 1); |
0 | 111 |
f:close(); |
206
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
112 |
if not next(data) then -- try to delete empty datastore |
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
113 |
os_remove(getpath(username, host, datastore)); |
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
114 |
end |
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
115 |
-- we write data even when we are deleting because lua doesn't have a |
e30d0e30a0ff
Datamanager now deletes files with no data
Waqas Hussain <waqas20@gmail.com>
parents:
182
diff
changeset
|
116 |
-- platform independent way of checking for non-exisitng files |
0 | 117 |
return true; |
118 |
end |
|
119 |
||
247
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
120 |
function list_append(username, host, datastore, data) |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
121 |
if not data then return; end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
122 |
-- save the datastore |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
123 |
local f, msg = io_open(getpath(username, host, datastore, "list"), "a+"); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
124 |
if not f then |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
125 |
log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
126 |
return; |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
127 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
128 |
f:write("item("); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
129 |
simplesave(f, data, 1); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
130 |
f:write(");\n"); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
131 |
f:close(); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
132 |
return true; |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
133 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
134 |
|
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
135 |
function list_store(username, host, datastore, data) |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
136 |
if not data then |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
137 |
data = {}; |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
138 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
139 |
-- save the datastore |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
140 |
local f, msg = io_open(getpath(username, host, datastore, "list"), "w+"); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
141 |
if not f then |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
142 |
log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
143 |
return; |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
144 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
145 |
for _, d in ipairs(data) do |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
146 |
f:write("item("); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
147 |
simplesave(f, d, 1); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
148 |
f:write(");\n"); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
149 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
150 |
f:close(); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
151 |
if not next(data) then -- try to delete empty datastore |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
152 |
os_remove(getpath(username, host, datastore, "list")); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
153 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
154 |
-- we write data even when we are deleting because lua doesn't have a |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
155 |
-- platform independent way of checking for non-exisitng files |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
156 |
return true; |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
157 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
158 |
|
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
159 |
function list_load(username, host, datastore) |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
160 |
local data, ret = loadfile(getpath(username, host, datastore, "list")); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
161 |
if not data then |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
162 |
log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
163 |
return nil; |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
164 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
165 |
local items = {}; |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
166 |
setfenv(data, {item = function(i) t_insert(items, i); end}); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
167 |
local success, ret = pcall(data); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
168 |
if not success then |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
169 |
log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
170 |
return nil; |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
171 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
172 |
return items; |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
173 |
end |
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
174 |
|
681b29aa134f
Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents:
206
diff
changeset
|
175 |
return _M; |