f804ae6baf432de38bee76b823bffd488ccc387a
[mailer.git] / inc / load_extensions.php
1 <?php
2 /************************************************************************
3  * MXChange v0.2.1                                    Start: 06/26/2004 *
4  * ===============                              Last change: 07/01/2005 *
5  *                                                                      *
6  * -------------------------------------------------------------------- *
7  * File              : load_extensions.php                              *
8  * -------------------------------------------------------------------- *
9  * Short description : Load all extensions                              *
10  * -------------------------------------------------------------------- *
11  * Kurzbeschreibung  : Alle Erweiterungen laden                         *
12  * -------------------------------------------------------------------- *
13  *                                                                      *
14  * -------------------------------------------------------------------- *
15  * Copyright (c) 2003 - 2008 by Roland Haeder                           *
16  * For more information visit: http://www.mxchange.org                  *
17  *                                                                      *
18  * This program is free software; you can redistribute it and/or modify *
19  * it under the terms of the GNU General Public License as published by *
20  * the Free Software Foundation; either version 2 of the License, or    *
21  * (at your option) any later version.                                  *
22  *                                                                      *
23  * This program is distributed in the hope that it will be useful,      *
24  * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
26  * GNU General Public License for more details.                         *
27  *                                                                      *
28  * You should have received a copy of the GNU General Public License    *
29  * along with this program; if not, write to the Free Software          *
30  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,               *
31  * MA  02110-1301  USA                                                  *
32  ************************************************************************/
33
34 // Some security stuff...
35 if (!defined('__SECURITY')) {
36         $INC = substr(dirname(__FILE__), 0, strpos(dirname(__FILE__), "/inc") + 4) . "/security.php";
37         require($INC);
38 }
39 //
40 global $EXT_CSS_FILES;
41 $EXT_CSS_FILES = array();
42 $ADD = "";
43
44 // Skip loading extensions
45 if ((!isBooleanConstantAndTrue('mxchange_installed')) || (isBooleanConstantAndTrue('mxchange_installing'))) return;
46
47 // Load default sql_patches extension if present
48 if (FILE_READABLE(PATH."inc/extensions/ext-sql_patches.php")) {
49         // Load it...
50         $EXT_LOAD_MODE = "";
51         require_once(PATH."inc/extensions/ext-sql_patches.php");
52         $cacheArray['active_extensions'] = array('sql_patches' => 'Y'); // KEEP THIS ALWAYS ACTIVE!
53 } else {
54         // Initialize array for "always keep active extensions"
55         $cacheArray['active_extensions'] = array();
56 }
57
58 //
59 // Load extensions
60 //
61 if (EXT_IS_ACTIVE("cache")) {
62         // Load cache extension alone
63         include_once(PATH."inc/libs/cache_functions.php");
64         $cacheMode = "";
65         include_once(PATH."inc/extensions/ext-cache.php");
66         switch($cacheInstance->cache_file("extensions", true)) {
67                 case true : $cacheMode = "load"; break;
68                 case false: $cacheMode = "init"; break;
69         }
70
71         // Do not recreate cache file when it's switched off!
72         if (($cacheMode == "init") && ($_CONFIG['cache_exts'] == "N")) $cacheMode = "skip";
73
74         // Load language
75         if ($cacheMode == "load") include(PATH."inc/language/cache_".GET_LANGUAGE().".php");
76 } else {
77         // Cache extension not active
78         $cacheMode = "no";
79 }
80
81 if ($cacheMode == "load") {
82         // Re-initialize handler
83         $cacheInstance->cache_file("extensions", true);
84
85         // Load extension data from cache file
86         $EXT_DUMMY = $cacheInstance->cache_load();
87
88         // Begin with the cache preparation of extensions
89         $EXT_NAMES = array();
90         foreach ($EXT_DUMMY['ext_name'] as $k => $name) {
91                 // Load functions file
92                 if ($EXT_DUMMY['ext_funcs'][$k] == "Y") {
93                         require_once(PATH."inc/libs/".$name."_functions.php");
94                 } // END - if
95
96                 // Load Language file
97                 if ($EXT_DUMMY['ext_lang'][$k] == "Y") {
98                         $INC = sprintf("%sinc/language/%s_%s.php", PATH, $name, GET_LANGUAGE());
99                         if (FILE_READABLE($INC)) require_once($INC);
100                 } // END - if
101
102                 // Load CSS file
103                 if ($EXT_DUMMY['ext_css'][$k] == "Y") $EXT_CSS_FILES[] = "".$name.".css";
104
105                 // Load extension file itself
106                 if (($EXT_DUMMY['ext_active'][$k] == "Y") || ($EXT_DUMMY['ext_keep'][$k] == "Y") || (IS_ADMIN())) {
107                         require_once(PATH."inc/extensions/ext-".$name.".php");
108                 } // END - if
109
110                 // Version number
111                 $EXT_DUMMY['ext_version'][$name] = $EXT_DUMMY['ext_version'][$k];
112                 unset($EXT_DUMMY['ext_version'][$k]);
113                 // Extension is active
114                 $EXT_DUMMY['ext_active'][$name] = $EXT_DUMMY['ext_active'][$k];
115                 unset($EXT_DUMMY['ext_active'][$k]);
116                 // Ext menu
117                 $EXT_DUMMY['ext_menu'][$name] = $EXT_DUMMY['ext_menu'][$k];
118                 unset($EXT_DUMMY['ext_menu'][$k]);
119                 // Extension id
120                 $EXT_DUMMY['ext_id'][$name] = $EXT_DUMMY['ext_id'][$k];
121                 $id = $EXT_DUMMY['ext_id'][$name];
122                 unset($EXT_DUMMY['ext_id'][$k]);
123
124                 // Add ext name
125                 $EXT_NAMES[$id] = $name;
126
127                 // Mark it as active extension
128                 $cacheArray['active_extensions']['$name'] = $EXT_DUMMY['ext_keep'][$k];
129                 unset($EXT_DUMMY['ext_keep'][$k]);
130
131                 // Remove unneccessary data from memory
132                 unset($EXT_DUMMY['ext_lang'][$k]);
133                 unset($EXT_DUMMY['ext_css'][$k]);
134                 unset($EXT_DUMMY['ext_funcs'][$k]);
135         } // END - foreach
136
137         // Write dummy array back
138         $EXT_DUMMY['ext_name'] = $EXT_NAMES;
139         unset($EXT_NAMES);
140
141         // Close cache file
142         $cacheInstance->cache_close();
143
144         // Loading cache is done so let's free some memory!
145         unset($EXT_DUMMY['ext_lang']);
146         unset($EXT_DUMMY['ext_keep']);
147         unset($EXT_DUMMY['ext_css']);
148         unset($EXT_DUMMY['ext_funcs']);
149         $cacheArray['extensions'] = $EXT_DUMMY;
150         unset($EXT_DUMMY);
151
152         // No database load needed
153         $res_ext_crt = false;
154
155         // Load more cache files (like admins)
156         require_once(PATH."inc/load_cache.php");
157 } else {
158         // If current user is not admin load only activated extensions
159         // The admin shall use every available extension for testing purposes
160         if ((!IS_ADMIN()) && ($cacheMode != "init")) $ADD = " WHERE ext_active='Y'";
161
162         if (GET_EXT_VERSION("sql_patches") >= "0.0.6") {
163                 // Query with CSS file from DB
164                 $res_ext_crt = SQL_QUERY("SELECT id, ext_name, ext_lang_file, ext_has_css, ext_active, ext_version
165 FROM "._MYSQL_PREFIX."_extensions".$ADD."
166 ORDER BY ext_name", __FILE__, __LINE__);
167         } else {
168                 // Old obsulete query string
169                 $res_ext_crt = SQL_QUERY("SELECT id, ext_name, ext_lang_file, ext_name, ext_active, ext_version
170 FROM "._MYSQL_PREFIX."_extensions".$ADD."
171 ORDER BY ext_name", __FILE__, __LINE__);
172         }
173 }
174
175 // Array for removed but not uninstalled extensions
176 $DEL = array();
177
178 // At least one found?
179 if ((SQL_NUMROWS($res_ext_crt) > 0) && (($cacheMode == "init") || ($cacheMode == "no")) && ($CSS != "1") && ($CSS != "-1")) {
180         // Load theme management
181         require_once(PATH."inc/theme-manager.php");
182
183         // If we need to init the cache init it now
184         if ($cacheMode == "init") $cacheInstance->cache_init("EXTENSIONS");
185
186         // Extensions are registered so we load them
187         while (list($EXT_ID, $name, $lang, $css, $active, $version) = SQL_FETCHROW($res_ext_crt)) {
188                 // Get menu entry
189                 $menu = "N";
190                 if (MODULE_HAS_MENU($name, true)) {
191                         $menu = "Y";
192                 } // END - if
193
194                 // Load extensions
195                 $file1 = sprintf("%sinc/extensions/ext-%s.php", PATH, $name);
196                 $file2 = $file1; $EXT_CSS = "N"; $EXT_ALWAYS_ACTIVE = "N";
197
198                 // Special functions file
199                 $file3 = sprintf("%sinc/libs/%s_functions.php", PATH, $name);
200
201                 // Does the extension file exists?
202                 if (FILE_READABLE($file1)) {
203                         // If there's no language file specified we don't need to load one... ;-)
204                         if (!empty($lang)) {
205                                 // Create language file
206                                 $file2 = sprintf("%sinc/language/%s_%s.php", PATH, $lang, GET_LANGUAGE());
207                         }
208
209                         if (FILE_READABLE($file3)) {
210                                 // Special functions file
211                                 $funcs = "Y";
212                                 require_once($file3);
213                         } else {
214                                 // Don't load functions file
215                                 $funcs = "N";
216                         }
217
218                         // Do we need a language file?
219                         if (($file1 != $file2) && (FILE_READABLE($file2))) {
220                                 // Load language file
221                                 $lang = "Y";
222                                 include($file2);
223                         } else {
224                                 // Don't load language file
225                                 $lang = "N";
226                         }
227
228                         // Load extension
229                         if ($name != "sql_patches") {
230                                 // Load extension's file
231                                 include_once($file1);
232                         } else {
233                                 // KEEP sql_patches ALWAYS ACTIVE!
234                                 $EXT_ALWAYS_ACTIVE = "Y";
235                         }
236
237                         if ($css == "Y") {
238                                 $CSS_FILE = sprintf("%stheme/%s/css/%s.css", PATH, GET_CURR_THEME(), $name);
239                                 if (FILE_READABLE($CSS_FILE)) {
240                                         // CSS file for extension was found (use only relative path for now!)
241                                         $EXT_CSS_FILES[] = $name.".css";
242                                 } else {
243                                         // Don't load CSS file
244                                         $css = "N";
245                                 }
246                         } // END - if
247
248                         // Add cache row
249                         if ($cacheMode == "init") {
250                                 $cacheInstance->add_row(array(
251                                         'ext_id'      => $EXT_ID,
252                                         'ext_name'    => $name,
253                                         'ext_lang'    => $lang,
254                                         'ext_css'     => $css,
255                                         'ext_menu'    => $menu,
256                                         'ext_funcs'   => $funcs,
257                                         'ext_active'  => $active,
258                                         'ext_version' => $version,
259                                         'ext_keep'    => $EXT_ALWAYS_ACTIVE,
260                                 ));
261                         } elseif ($cacheMode == "no") {
262                                 // Remember this value for later usage
263                                 $cacheArray['active_extensions'][$name] = $EXT_ALWAYS_ACTIVE;
264                         }
265                 } elseif (!FILE_READABLE($file1)) {
266                         // Deleted extension file so we mark it for removal from DB
267                         $DEL[] = $name;
268                 }
269         } // END - while
270
271         if ($cacheMode == "init") {
272                 // Close cache file
273                 $cacheInstance->cache_close();
274
275                 // Load more cache files (like admins)
276                 require_once(PATH."inc/load_cache.php");
277         } // END - if
278
279         // Free memory
280         SQL_FREERESULT($res_ext_crt);
281 }
282
283 // Load include files if found
284 if (!empty($INC_POOL[0])) {
285         foreach ($INC_POOL as $inc) {
286                 require_once($inc);
287         } // END - foreach
288
289         // Remove array
290         unset($INC_POOL);
291 } // END - if
292
293 // Uninstall extensions that are no longer in our system
294 if (!empty($DEL[0])) {
295         // Remove extensions from two tables: extension registry and tasks table
296         foreach ($DEL as $name) {
297                 // First remove entry from extensions table
298                 SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
299                         array($name), __FILE__, __LINE__);
300
301                 // Remove (maybe?) found tasks (main task and possible updates
302                 SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_task_system WHERE subject LIKE '[%s:] %' AND (task_type='EXTENSION' OR task_type='EXTENSION_UPDATE')",
303                         array($name), __FILE__, __LINE__);
304         } // END - foreach
305
306         // I think it's not neccessary to run the optimization function here
307         // because we didn't delete so much data from database. Can you aggree?
308 } // END - if
309
310 //
311 ?>