local format = string.format;
local setmetatable, type = setmetatable, type;
-local pairs = pairs;
+local pairs, ipairs = pairs, ipairs;
local char = string.char;
local loadfile, setfenv, pcall = loadfile, setfenv, pcall;
local log = log;
local io_open = io.open;
+local os_remove = os.remove;
local tostring = tostring;
+local error = error;
+local next = next;
+local t_insert = table.insert;
+
+local indent = function(f, i)
+ for n = 1, i do
+ f:write("\t");
+ end
+end
module "datamanager"
end
local function basicSerialize (o)
- if type(o) == "number" or type(o) == "boolean" then
- return tostring(o)
- else -- assume it is a string
- return format("%q", tostring(o))
- end
+ if type(o) == "number" or type(o) == "boolean" then
+ return tostring(o);
+ else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise.
+ return (format("%q", tostring(o)):gsub("\\\n", "\\n"));
+ end
end
-local function simplesave (f, o)
- if type(o) == "number" then
- f:write(o)
- elseif type(o) == "string" then
- f:write(format("%q", o))
- elseif type(o) == "table" then
- f:write("{\n")
- for k,v in pairs(o) do
- f:write(" [", basicSerialize(k), "] = ")
- simplesave(f, v)
- f:write(",\n")
- end
- f:write("}\n")
- else
- error("cannot serialize a " .. type(o))
- end
- end
-
+local function simplesave (f, o, ind)
+ if type(o) == "number" then
+ f:write(o)
+ elseif type(o) == "string" then
+ f:write((format("%q", o):gsub("\\\n", "\\n")))
+ elseif type(o) == "table" then
+ f:write("{\n")
+ for k,v in pairs(o) do
+ indent(f, ind);
+ f:write("[", basicSerialize(k), "] = ")
+ simplesave(f, v, ind+1)
+ f:write(",\n")
+ end
+ indent(f, ind-1);
+ f:write("}")
+ elseif type(o) == "boolean" then
+ f:write(o and "true" or "false");
+ else
+ error("cannot serialize a " .. type(o))
+ end
+end
+
------- API -------------
-function getpath(username, host, datastore)
+function getpath(username, host, datastore, ext)
+ ext = ext or "dat";
if username then
- return format("data/%s/%s/%s.dat", encode(host), datastore, encode(username));
+ return format("data/%s/%s/%s.%s", encode(host), datastore, encode(username), ext);
elseif host then
- return format("data/%s/%s.dat", encode(host), datastore);
+ return format("data/%s/%s.%s", encode(host), datastore, ext);
else
- return format("data/%s.dat", datastore);
+ return format("data/%s.%s", datastore, ext);
end
end
function load(username, host, datastore)
local data, ret = loadfile(getpath(username, host, datastore));
- if not data then log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..username.."@"..host); return nil; end
+ if not data then
+ log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
+ return nil;
+ end
setfenv(data, {});
local success, ret = pcall(data);
- if not success then log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..username.."@"..host); return nil; end
+ if not success then
+ log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
+ return nil;
+ end
return ret;
end
function store(username, host, datastore, data)
+ if not data then
+ data = {};
+ end
+ -- save the datastore
local f, msg = io_open(getpath(username, host, datastore), "w+");
- if not f then log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..username.."@"..host); return nil; end
+ if not f then
+ log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
+ return;
+ end
f:write("return ");
- simplesave(f, data);
+ simplesave(f, data, 1);
f:close();
+ if not next(data) then -- try to delete empty datastore
+ os_remove(getpath(username, host, datastore));
+ end
+ -- we write data even when we are deleting because lua doesn't have a
+ -- platform independent way of checking for non-exisitng files
return true;
end
+function list_append(username, host, datastore, data)
+ if not data then return; end
+ -- save the datastore
+ local f, msg = io_open(getpath(username, host, datastore, "list"), "a+");
+ if not f then
+ log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
+ return;
+ end
+ f:write("item(");
+ simplesave(f, data, 1);
+ f:write(");\n");
+ f:close();
+ return true;
+end
+
+function list_store(username, host, datastore, data)
+ if not data then
+ data = {};
+ end
+ -- save the datastore
+ local f, msg = io_open(getpath(username, host, datastore, "list"), "w+");
+ if not f then
+ log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
+ return;
+ end
+ for _, d in ipairs(data) do
+ f:write("item(");
+ simplesave(f, d, 1);
+ f:write(");\n");
+ end
+ f:close();
+ if not next(data) then -- try to delete empty datastore
+ os_remove(getpath(username, host, datastore, "list"));
+ end
+ -- we write data even when we are deleting because lua doesn't have a
+ -- platform independent way of checking for non-exisitng files
+ return true;
+end
+
+function list_load(username, host, datastore)
+ local data, ret = loadfile(getpath(username, host, datastore, "list"));
+ if not data then
+ log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
+ return nil;
+ end
+ local items = {};
+ setfenv(data, {item = function(i) t_insert(items, i); end});
+ local success, ret = pcall(data);
+ if not success then
+ log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
+ return nil;
+ end
+ return items;
+end
+
+return _M;
projects / prosody.git / blobdiff