1 local format = string.format;
2 local setmetatable, type = setmetatable, type;
3 local pairs, ipairs = pairs, ipairs;
4 local char = string.char;
5 local loadfile, setfenv, pcall = loadfile, setfenv, pcall;
7 local io_open = io.open;
8 local os_remove = os.remove;
9 local tostring, tonumber = tostring, tonumber;
12 local t_insert = table.insert;
14 local indent = function(f, i)
26 local log = function (type, msg) return log(type, "datamanager", msg); end
29 local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end });
32 return s and (s:gsub("+", " "):gsub("%%([a-fA-F0-9][a-fA-F0-9])", urlcodes));
36 return s and (s:gsub("%W", function (c) return format("%%%x", c:byte()); end));
40 local function basicSerialize (o)
41 if type(o) == "number" or type(o) == "boolean" then
43 else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise.
44 return (format("%q", tostring(o)):gsub("\\\n", "\\n"));
49 local function simplesave (f, o, ind)
50 if type(o) == "number" then
52 elseif type(o) == "string" then
53 f:write((format("%q", o):gsub("\\\n", "\\n")))
54 elseif type(o) == "table" then
56 for k,v in pairs(o) do
58 f:write("[", basicSerialize(k), "] = ")
59 simplesave(f, v, ind+1)
64 elseif type(o) == "boolean" then
65 f:write(o and "true" or "false");
67 error("cannot serialize a " .. type(o))
71 ------- API -------------
73 function getpath(username, host, datastore, ext)
76 return format("data/%s/%s/%s.%s", encode(host), datastore, encode(username), ext);
78 return format("data/%s/%s.%s", encode(host), datastore, ext);
80 return format("data/%s.%s", datastore, ext);
84 function load(username, host, datastore)
85 local data, ret = loadfile(getpath(username, host, datastore));
87 log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
91 local success, ret = pcall(data);
93 log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
99 function store(username, host, datastore, data)
103 -- save the datastore
104 local f, msg = io_open(getpath(username, host, datastore), "w+");
106 log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
110 simplesave(f, data, 1);
112 if not next(data) then -- try to delete empty datastore
113 os_remove(getpath(username, host, datastore));
115 -- we write data even when we are deleting because lua doesn't have a
116 -- platform independent way of checking for non-exisitng files
120 function list_append(username, host, datastore, data)
121 if not data then return; end
122 -- save the datastore
123 local f, msg = io_open(getpath(username, host, datastore, "list"), "a+");
125 log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
129 simplesave(f, data, 1);
135 function list_store(username, host, datastore, data)
139 -- save the datastore
140 local f, msg = io_open(getpath(username, host, datastore, "list"), "w+");
142 log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
145 for _, d in ipairs(data) do
151 if not next(data) then -- try to delete empty datastore
152 os_remove(getpath(username, host, datastore, "list"));
154 -- we write data even when we are deleting because lua doesn't have a
155 -- platform independent way of checking for non-exisitng files
159 function list_load(username, host, datastore)
160 local data, ret = loadfile(getpath(username, host, datastore, "list"));
162 log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
166 setfenv(data, {item = function(i) t_insert(items, i); end});
167 local success, ret = pcall(data);
169 log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));