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