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 ((!defined('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
 284 if (!empty($INC_POOL[0])) {
 285         foreach ($INC_POOL as $inc) {
 286                 require_once($inc);
 287         } // END - foreach
 288 } // END - if
 289
 290 // Uninstall extensions that are no longer in our system
 291 if (!empty($DEL[0])) {
 292         // Remove extensions from two tables: extension registry and tasks table
 293         foreach ($DEL as $name) {
 294                 // First remove entry from extensions table
 295                 SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
 296                         array($name), __FILE__, __LINE__);
 297
 298                 // Remove (maybe?) found tasks (main task and possible updates
 299                 SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_task_system WHERE subject LIKE '[%s:] %' AND (task_type='EXTENSION' OR task_type='EXTENSION_UPDATE')",
 300                         array($name), __FILE__, __LINE__);
 301         } // END - foreach
 302
 303         // I think it's not neccessary to run the optimization function here
 304         // because we didn't delete so much data from database. Can you aggree?
 305 } // END - if
 306
 307 //
 308 ?>