X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=util%2Fdatamanager.lua;h=54cf195932eba962e254d9016da76ea51311116f;hb=a80f2d734aaf6cf54728a7d9e4a68335f91af8f9;hp=6a811879706facc934cad31834d2fa44d3e28146;hpb=329548a9db2cbe5db614e59066ba1105ddf92ebf;p=prosody.git

diff --git a/util/datamanager.lua b/util/datamanager.lua
index 6a811879..54cf1959 100644
--- a/util/datamanager.lua
+++ b/util/datamanager.lua
@@ -1,20 +1,9 @@
--- Prosody IM v0.2
--- Copyright (C) 2008 Matthew Wild
--- Copyright (C) 2008 Waqas Hussain
+-- Prosody IM v0.4
+-- Copyright (C) 2008-2009 Matthew Wild
+-- Copyright (C) 2008-2009 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.
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
 --
 
 
@@ -61,14 +50,42 @@ local function mkdir(path)
 end
 
 local data_path = "data";
+local callbacks = {};
 
 ------- API -------------
 
 function set_data_path(path)
-	log("info", "Setting data path to %s", path);
+	log("debug", "Setting data path to: %s", path);
 	data_path = path;
 end
 
+local function callback(username, host, datastore, data)
+	for _, f in ipairs(callbacks) do
+		username, host, datastore, data = f(username, host, datastore, data);
+		if not username then break; end
+	end
+	
+	return username, host, datastore, data;
+end
+function add_callback(func)
+	if not callbacks[func] then -- Would you really want to set the same callback more than once?
+		callbacks[func] = true;
+		callbacks[#callbacks+1] = func;
+		return true;
+	end
+end
+function remove_callback(func)
+	if callbacks[func] then
+		for i, f in ipairs(callbacks) do
+			if f == func then
+				callbacks[i] = nil;
+				callbacks[f] = nil;
+				return true;
+			end
+		end
+	end
+end
+
 function getpath(username, host, datastore, ext, create)
 	ext = ext or "dat";
 	host = host and encode(host);
@@ -88,7 +105,7 @@ 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("debug", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
 		return nil;
 	end
 	setfenv(data, {});
@@ -104,6 +121,12 @@ function store(username, host, datastore, data)
 	if not data then
 		data = {};
 	end
+
+	username, host, datastore, data = callback(username, host, datastore, data);
+	if not username then
+		return true; -- Don't save this data at all
+	end
+
 	-- save the datastore
 	local f, msg = io_open(getpath(username, host, datastore, nil, true), "w+");
 	if not f then
@@ -113,7 +136,8 @@ function store(username, host, datastore, data)
 	f:write("return ");
 	append(f, data);
 	f:close();
-	if not next(data) then -- try to delete empty datastore
+	if next(data) == nil then -- try to delete empty datastore
+		log("debug", "Removing empty %s datastore for user %s@%s", datastore, username, host);
 		os_remove(getpath(username, host, datastore));
 	end
 	-- we write data even when we are deleting because lua doesn't have a
@@ -123,6 +147,7 @@ end
 
 function list_append(username, host, datastore, data)
 	if not data then return; end
+	if callback and callback(username, host, datastore) then return true; end
 	-- save the datastore
 	local f, msg = io_open(getpath(username, host, datastore, "list", true), "a+");
 	if not f then
@@ -140,6 +165,7 @@ function list_store(username, host, datastore, data)
 	if not data then
 		data = {};
 	end
+	if callback and callback(username, host, datastore) then return true; end
 	-- save the datastore
 	local f, msg = io_open(getpath(username, host, datastore, "list", true), "w+");
 	if not f then
@@ -152,7 +178,8 @@ function list_store(username, host, datastore, data)
 		f:write(");\n");
 	end
 	f:close();
-	if not next(data) then -- try to delete empty datastore
+	if next(data) == nil then -- try to delete empty datastore
+		log("debug", "Removing empty %s datastore for user %s@%s", datastore, username, host);
 		os_remove(getpath(username, host, datastore, "list"));
 	end
 	-- we write data even when we are deleting because lua doesn't have a
@@ -163,7 +190,7 @@ 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"));
+		log("debug", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
 		return nil;
 	end
 	local items = {};