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