X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=util%2Fdatamanager.lua;h=45da17ddfe6913562cbc32b00d1513df2a93cbad;hb=cc99208ab793ff03e4a0d030cfcb355756260fcb;hp=754c56202b78d5dd0b47934442814a59a2c15da1;hpb=c9ada95ddbc8538d8994ee314fbf3cd426a0908c;p=prosody.git diff --git a/util/datamanager.lua b/util/datamanager.lua index 754c5620..45da17dd 100644 --- a/util/datamanager.lua +++ b/util/datamanager.lua @@ -1,21 +1,41 @@ +-- Prosody IM v0.2 +-- Copyright (C) 2008 Matthew Wild +-- Copyright (C) 2008 Waqas Hussain +-- +-- This program is free software; you can redistribute it and/or +-- modify it under the terms of the GNU General Public License +-- as published by the Free Software Foundation; either version 2 +-- of the License, or (at your option) any later version. +-- +-- This program is distributed in the hope that it will be useful, +-- but WITHOUT ANY WARRANTY; without even the implied warranty of +-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +-- GNU General Public License for more details. +-- +-- You should have received a copy of the GNU General Public License +-- along with this program; if not, write to the Free Software +-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +-- + + 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 log = require "util.logger".init("datamanager"); local io_open = io.open; -local tostring = tostring; +local os_remove = os.remove; +local tostring, tonumber = tostring, tonumber; local error = error; +local next = next; +local t_insert = table.insert; +local append = require "util.serialization".append; module "datamanager" - ---- utils ----- local encode, decode; - -local log = function (type, msg) return log(type, "datamanager", msg); end - do local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end }); @@ -24,76 +44,118 @@ do end encode = function (s) - return s and (s:gsub("%W", function (c) return format("%%%x", c:byte()); end)); + return s and (s:gsub("%W", function (c) return format("%%%02x", c:byte()); end)); end 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 -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") - 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) +local data_path = "data"; +function set_data_path(path) + log("info", "Setting data path to %s", path); + data_path = path; +end + +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("%s/%s/%s/%s.%s", data_path, encode(host), datastore, encode(username), ext); elseif host then - return format("data/%s/%s.dat", encode(host), datastore); + return format("%s/%s/%s.%s", data_path, encode(host), datastore, ext); else - return format("data/%s.dat", datastore); + return format("%s/%s.%s", data_path, 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 or nil).."@"..(host or nil)); + 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 or nil).."@"..(host or nil)); + 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 or nil).."@"..(host or nil)); - return nil; + 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); + append(f, data); + 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("); + append(f, data); + f:write(");\n"); f:close(); return true; end -return _M; \ No newline at end of file +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("); + append(f, d); + 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;