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;
6 local log = require "util.logger".init("datamanager");
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)
20 local data_path = "data";
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 set_data_path(path)
77 function getpath(username, host, datastore, ext)
80 return format("%s/%s/%s/%s.%s", data_path, encode(host), datastore, encode(username), ext);
82 return format("%s/%s/%s.%s", data_path, encode(host), datastore, ext);
84 return format("%s/%s.%s", data_path, datastore, ext);
88 function load(username, host, datastore)
89 local data, ret = loadfile(getpath(username, host, datastore));
91 log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
95 local success, ret = pcall(data);
97 log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
103 function store(username, host, datastore, data)
107 -- save the datastore
108 local f, msg = io_open(getpath(username, host, datastore), "w+");
110 log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
114 simplesave(f, data, 1);
116 if not next(data) then -- try to delete empty datastore
117 os_remove(getpath(username, host, datastore));
119 -- we write data even when we are deleting because lua doesn't have a
120 -- platform independent way of checking for non-exisitng files
124 function list_append(username, host, datastore, data)
125 if not data then return; end
126 -- save the datastore
127 local f, msg = io_open(getpath(username, host, datastore, "list"), "a+");
129 log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
133 simplesave(f, data, 1);
139 function list_store(username, host, datastore, data)
143 -- save the datastore
144 local f, msg = io_open(getpath(username, host, datastore, "list"), "w+");
146 log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
149 for _, d in ipairs(data) do
155 if not next(data) then -- try to delete empty datastore
156 os_remove(getpath(username, host, datastore, "list"));
158 -- we write data even when we are deleting because lua doesn't have a
159 -- platform independent way of checking for non-exisitng files
163 function list_load(username, host, datastore)
164 local data, ret = loadfile(getpath(username, host, datastore, "list"));
166 log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
170 setfenv(data, {item = function(i) t_insert(items, i); end});
171 local success, ret = pcall(data);
173 log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));