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 // Init variables
  41 global $EXT_CSS_FILES;
  42 $EXT_CSS_FILES = array();
  43 $ADD = "";
  44
  45 // Skip loading extensions
  46 if ((!isBooleanConstantAndTrue('mxchange_installed')) || (isBooleanConstantAndTrue('mxchange_installing'))) return;
  47
  48 // Initialize array for "always keep active extensions"
  49 $cacheArray['active_extensions'] = array();
  50
  51 // By default no cache is set
  52 $cacheMode = "no";
  53
  54 // Load sql_patchrs extension alone
  55 LOAD_EXTENSION("sql_patches");
  56
  57 //
  58 // Load extensions
  59 //
  60 if (EXT_IS_ACTIVE("cache")) {
  61         // Load cache extension alone
  62         LOAD_EXTENSION("cache");
  63
  64         // Check extension cache
  65         switch (($cacheInstance->loadCacheFile("extensions", true)) && ($cacheInstance->extensionVersionMatches("sql_patches"))) {
  66                 case true : $cacheMode = "load"; break;
  67                 case false: $cacheMode = "init"; break;
  68         }
  69
  70         // Do we need to init the cache?
  71         if (($cacheMode == "init") && ($_CONFIG['cache_exts'] == "Y")) {
  72                 // Init cache file
  73                 $cacheInstance->init("EXTENSIONS");
  74                 $cacheInstance->storeExtensionVersion("sql_patches");
  75         } elseif ($_CONFIG['cache_exts'] == "N") {
  76                 // Cache will not be created for extensions
  77                 $cacheMode = "skip";
  78         }
  79 } // END - if
  80
  81 // Load cache?
  82 if ($cacheMode == "load") {
  83         // Init include array
  84         $EXT_POOL = array();
  85
  86         // Re-initialize handler
  87         $cacheInstance->loadCacheFile("extensions", true);
  88
  89         // Load extension data from cache file
  90         $EXT_DUMMY = $cacheInstance->getArrayFromCache();
  91
  92         // Is the cache file fine?
  93         if (!isset($EXT_DUMMY['ext_name'])) {
  94                 // Cache file is damaged so kill it
  95                 $cacheInstance->destroyCacheFile();
  96
  97                 // Skip any further execution
  98                 return;
  99         } // END -  if
 100
 101         // Begin with the cache preparation of extensions
 102         $EXT_NAMES = array();
 103         foreach ($EXT_DUMMY['ext_name'] as $k => $name) {
 104                 // Load CSS file
 105                 if ($EXT_DUMMY['ext_css'][$k] == "Y") $EXT_CSS_FILES[] = "".$name.".css";
 106
 107                 // Load extension file itself
 108                 if ((($EXT_DUMMY['ext_active'][$k] == "Y") || ($EXT_DUMMY['ext_keep'][$k] == "Y") || (IS_ADMIN())) && (!in_array($name, array("sql_patches", "cache")))) {
 109                         $EXT_POOL[] = $name;
 110                 } // END - if
 111
 112                 // Version number
 113                 $EXT_DUMMY['ext_version'][$name] = $EXT_DUMMY['ext_version'][$k];
 114                 unset($EXT_DUMMY['ext_version'][$k]);
 115
 116                 // Extension is active
 117                 $EXT_DUMMY['ext_active'][$name] = $EXT_DUMMY['ext_active'][$k];
 118                 unset($EXT_DUMMY['ext_active'][$k]);
 119
 120                 // Ext menu
 121                 $EXT_DUMMY['ext_menu'][$name] = $EXT_DUMMY['ext_menu'][$k];
 122                 unset($EXT_DUMMY['ext_menu'][$k]);
 123
 124                 // Extension id
 125                 $EXT_DUMMY['ext_id'][$name] = $EXT_DUMMY['ext_id'][$k];
 126                 $id = $EXT_DUMMY['ext_id'][$name];
 127                 unset($EXT_DUMMY['ext_id'][$k]);
 128
 129                 // Add ext name
 130                 $EXT_NAMES[$id] = $name;
 131
 132                 // Add deprecated flag (defaults to "not deprecated")
 133                 $EXT_DUMMY['ext_deprecated'][$name] = "N";
 134
 135                 // Mark it as active extension
 136                 $cacheArray['active_extensions']['$name'] = $EXT_DUMMY['ext_keep'][$k];
 137                 unset($EXT_DUMMY['ext_keep'][$k]);
 138
 139                 // Remove unneccessary data from memory
 140                 unset($EXT_DUMMY['ext_css'][$k]);
 141         } // END - foreach
 142
 143         // Write dummy array back
 144         $EXT_DUMMY['ext_name'] = $EXT_NAMES;
 145         unset($EXT_NAMES);
 146
 147         // Loading cache is done so let's free some memory!
 148         unset($EXT_DUMMY['ext_keep']);
 149         unset($EXT_DUMMY['ext_css']);
 150         $cacheArray['extensions'] = $EXT_DUMMY;
 151         unset($EXT_DUMMY);
 152
 153         // No database load needed
 154         $res_ext_crt = false;
 155
 156         // Load more cache files (like admins)
 157         require_once(PATH."inc/load_cache.php");
 158
 159         // Load all extension files
 160         foreach ($EXT_POOL as $ext) {
 161                 LOAD_EXTENSION($ext);
 162         } // END - foreach
 163
 164         // Remove array
 165         unset($EXT_POOL);
 166 } else {
 167         // If current user is not admin load only activated extensions. But load
 168         // them all if we are going to init the cache files. The admin shall use
 169         // every available extension for testing purposes.
 170         if ((!IS_ADMIN()) && ($cacheMode != "init")) $ADD = " WHERE ext_active='Y'";
 171
 172         if (GET_EXT_VERSION("sql_patches") >= "0.0.6") {
 173                 // Query with CSS file from DB
 174                 $res_ext_crt = SQL_QUERY("SELECT id AS ext_id, ext_name, ext_has_css AS ext_css, ext_active, ext_version
 175 FROM "._MYSQL_PREFIX."_extensions".$ADD."
 176 ORDER BY ext_name", __FILE__, __LINE__);
 177         } else {
 178                 // Old obsolete query string
 179                 $res_ext_crt = SQL_QUERY("SELECT id AS ext_id, ext_name, ext_name, ext_active, ext_version
 180 FROM "._MYSQL_PREFIX."_extensions".$ADD."
 181 ORDER BY ext_name", __FILE__, __LINE__);
 182         }
 183 }
 184
 185 // Array for removed but not uninstalled extensions
 186 $DEL = array();
 187
 188 // At least one found?
 189 if ((SQL_NUMROWS($res_ext_crt) > 0) && ((($cacheMode == "init") && ($CSS != "1") && ($CSS != "-1")) || ($cacheMode == "no"))) {
 190         // Load theme management
 191         require_once(PATH."inc/theme-manager.php");
 192
 193         // Extensions are registered so we load them
 194         while ($content = SQL_FETCHARRAY($res_ext_crt)) {
 195                 // Get menu entry
 196                 $content['ext_menu'] = "N";
 197                 if (MODULE_HAS_MENU($content['ext_name'], true)) {
 198                         $content['ext_menu'] = "Y";
 199                 } // END - if
 200
 201                 // Load extensions
 202                 $file1 = sprintf("%sinc/extensions/ext-%s.php", PATH, $content['ext_name']);
 203                 $EXT_CSS = "N"; $EXT_ALWAYS_ACTIVE = "N";
 204
 205                 // Does the extension file exists?
 206                 if (FILE_READABLE($file1)) {
 207                         // By default no extension is always active, except sql_patches
 208                         $EXT_ALWAYS_ACTIVE = "N";
 209
 210                         // Load extension
 211                         if (($content['ext_name'] != "sql_patches") && (($content['ext_name'] != "cache") || (!EXT_IS_ACTIVE("cache")))) {
 212                                 // Load extension
 213                                 LOAD_EXTENSION($content['ext_name']);
 214                         } else {
 215                                 // Keep sql_patches always active
 216                                 $EXT_ALWAYS_ACTIVE = "Y";
 217                         }
 218
 219                         // Transfer EXT_ALWAYS_ACTIVE flag
 220                         $content['ext_keep'] = $EXT_ALWAYS_ACTIVE;
 221
 222                         // CSS file handling:
 223                         if ((!isset($content['ext_css'])) || ($content['ext_css'] == "Y")) {
 224                                 // Create FQFN for the CSS file
 225                                 $CSS_FILE = sprintf("%stheme/%s/css/%s.css", PATH, GET_CURR_THEME(), $content['ext_name']);
 226
 227                                 // Is the file there?
 228                                 if (FILE_READABLE($CSS_FILE)) {
 229                                         // CSS file for extension was found (use only relative path for now!)
 230                                         $EXT_CSS_FILES[] = $content['ext_name'].".css";
 231                                         $content['ext_css'] = "Y";
 232                                 } else {
 233                                         // Don't load CSS file
 234                                         $content['ext_css'] = "N";
 235                                 }
 236                         } // END - if
 237
 238                         // Shall we cache?
 239                         if ($cacheMode == "init") {
 240                                 // Add cache row
 241                                 $cacheInstance->addRow($content);
 242                         } elseif ($cacheMode == "no") {
 243                                 // Remember this value for later usage
 244                                 $cacheArray['active_extensions'][$content['ext_name']] = $EXT_ALWAYS_ACTIVE;
 245                         }
 246                 } elseif (!FILE_READABLE($file1)) {
 247                         // Deleted extension file so we mark it for removal from DB
 248                         $DEL[] = $content['ext_name'];
 249                 }
 250         } // END - while
 251
 252         if ($cacheMode == "init") {
 253                 // Close cache file
 254                 $cacheInstance->finalize();
 255
 256                 // Load more cache files (like admins)
 257                 require_once(PATH."inc/load_cache.php");
 258         } // END - if
 259
 260         // Free memory
 261         SQL_FREERESULT($res_ext_crt);
 262 } // END - if
 263
 264 // Load include files if found
 265 if (!empty($INC_POOL[0])) {
 266         foreach ($INC_POOL as $inc) {
 267                 require_once($inc);
 268         } // END - foreach
 269
 270         // Remove array
 271         unset($INC_POOL);
 272 } // END - if
 273
 274 // Uninstall extensions that are no longer in our system
 275 if (!empty($DEL[0])) {
 276         // Remove extensions from two tables: extension registry and tasks table
 277         foreach ($DEL as $del_ext) {
 278                 // First remove entry from extensions table
 279                 SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
 280                         array($del_ext), __FILE__, __LINE__);
 281
 282                 // Remove (maybe?) found tasks (main task and possible updates
 283                 SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_task_system WHERE subject LIKE '[%s:]%%' AND (task_type='EXTENSION' OR task_type='EXTENSION_UPDATE')",
 284                         array($del_ext), __FILE__, __LINE__);
 285         } // END - foreach
 286
 287         // I think it's not neccessary to run the optimization function here
 288         // because we didn't delete so much data from database. Can you aggree?
 289 } // END - if
 290
 291 //
 292 ?>