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 (ereg(basename(__FILE__), $_SERVER['PHP_SELF']))
  36 {
  37         $INC = substr(dirname(__FILE__), 0, strpos(dirname(__FILE__), "/inc") + 4) . "/security.php";
  38         require($INC);
  39 }
  40 //
  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 // Load default sql_patches extension if present
  49 if (FILE_READABLE(PATH."inc/extensions/ext-sql_patches.php")) {
  50         // Load it...
  51         $EXT_LOAD_MODE = "";
  52         require_once(PATH."inc/extensions/ext-sql_patches.php");
  53         $cacheArray['active_extensions'] = array('sql_patches' => 'Y'); // KEEP THIS ALWAYS ACTIVE!
  54 } else {
  55         // Initialize array for "always keep active extensions"
  56         $cacheArray['active_extensions'] = array();
  57 }
  58
  59 //
  60 // Load extensions
  61 //
  62 if (EXT_IS_ACTIVE("cache")) {
  63         // Load cache extension alone
  64         include_once(PATH."inc/libs/cache_functions.php");
  65         $cacheMode = "";
  66         include_once(PATH."inc/extensions/ext-cache.php");
  67         switch($cacheInstance->cache_file("extensions", true)) {
  68                 case true : $cacheMode = "load"; break;
  69                 case false: $cacheMode = "init"; break;
  70         }
  71
  72         // Do not recreate cache file when it's switched off!
  73         if (($cacheMode == "init") && ($_CONFIG['cache_exts'] == "N")) $cacheMode = "skip";
  74
  75         // Load language
  76         if ($cacheMode == "load") include(PATH."inc/language/cache_".GET_LANGUAGE().".php");
  77 } else {
  78         // Cache extension not active
  79         $cacheMode = "no";
  80 }
  81
  82 if ($cacheMode == "load") {
  83         // Re-initialize handler
  84         $cacheInstance->cache_file("extensions", true);
  85
  86         // Load extension data from cache file
  87         $EXT_DUMMY = $cacheInstance->cache_load();
  88
  89         // Begin with the cache preparation of extensions
  90         $EXT_NAMES = array();
  91         foreach ($EXT_DUMMY['ext_name'] as $k => $name) {
  92                 // Load functions file
  93                 if ($EXT_DUMMY['ext_funcs'][$k] == "Y") {
  94                         require_once(PATH."inc/libs/".$name."_functions.php");
  95                 } // END - if
  96
  97                 // Load Language file
  98                 if ($EXT_DUMMY['ext_lang'][$k] == "Y") {
  99                         $INC = sprintf("%sinc/language/%s_%s.php", PATH, $name, GET_LANGUAGE());
 100                         if (FILE_READABLE($INC)) require_once($INC);
 101                 } // END - if
 102
 103                 // Load CSS file
 104                 if ($EXT_DUMMY['ext_css'][$k] == "Y") $EXT_CSS_FILES[] = "".$name.".css";
 105
 106                 // Load extension file itself
 107                 if (($EXT_DUMMY['ext_active'][$k] == "Y") || ($EXT_DUMMY['ext_keep'][$k] == "Y") || (IS_ADMIN())) {
 108                         require_once(PATH."inc/extensions/ext-".$name.".php");
 109                 } // END - if
 110
 111                 // Version number
 112                 $EXT_DUMMY['ext_version'][$name] = $EXT_DUMMY['ext_version'][$k];
 113                 unset($EXT_DUMMY['ext_version'][$k]);
 114                 // Extension is active
 115                 $EXT_DUMMY['ext_active'][$name] = $EXT_DUMMY['ext_active'][$k];
 116                 unset($EXT_DUMMY['ext_active'][$k]);
 117                 // Ext menu
 118                 $EXT_DUMMY['ext_menu'][$name] = $EXT_DUMMY['ext_menu'][$k];
 119                 unset($EXT_DUMMY['ext_menu'][$k]);
 120                 // Extension id
 121                 $EXT_DUMMY['ext_id'][$name] = $EXT_DUMMY['ext_id'][$k];
 122                 $id = $EXT_DUMMY['ext_id'][$name];
 123                 unset($EXT_DUMMY['ext_id'][$k]);
 124
 125                 // Add ext name
 126                 $EXT_NAMES[$id] = $name;
 127
 128                 // Mark it as active extension
 129                 $cacheArray['active_extensions']['$name'] = $EXT_DUMMY['ext_keep'][$k];
 130                 unset($EXT_DUMMY['ext_keep'][$k]);
 131
 132                 // Remove unneccessary data from memory
 133                 unset($EXT_DUMMY['ext_lang'][$k]);
 134                 unset($EXT_DUMMY['ext_css'][$k]);
 135                 unset($EXT_DUMMY['ext_funcs'][$k]);
 136         } // END - foreach
 137
 138         // Write dummy array back
 139         $EXT_DUMMY['ext_name'] = $EXT_NAMES;
 140         unset($EXT_NAMES);
 141
 142         // Close cache file
 143         $cacheInstance->cache_close();
 144
 145         // Loading cache is done so let's free some memory!
 146         unset($EXT_DUMMY['ext_lang']);
 147         unset($EXT_DUMMY['ext_keep']);
 148         unset($EXT_DUMMY['ext_css']);
 149         unset($EXT_DUMMY['ext_funcs']);
 150         $cacheArray['extensions'] = $EXT_DUMMY;
 151         unset($EXT_DUMMY);
 152
 153         // No database load needed
 154         $res_ext_crt = false;
 155
 156         // Load more cache files (like admins)
 157         require_once(PATH."inc/load_cache.php");
 158 } else {
 159         // If current user is not admin load only activated extensions
 160         // The admin shall use every available extension for testing purposes
 161         if ((!IS_ADMIN()) && ($cacheMode != "init")) $ADD = " WHERE ext_active='Y'";
 162
 163         if (GET_EXT_VERSION("sql_patches") >= "0.0.6") {
 164                 // Query with CSS file from DB
 165                 $res_ext_crt = SQL_QUERY("SELECT id, ext_name, ext_lang_file, ext_has_css, ext_active, ext_version
 166 FROM "._MYSQL_PREFIX."_extensions".$ADD."
 167 ORDER BY ext_name", __FILE__, __LINE__);
 168         } else {
 169                 // Old obsulete query string
 170                 $res_ext_crt = SQL_QUERY("SELECT id, ext_name, ext_lang_file, ext_name, ext_active, ext_version
 171 FROM "._MYSQL_PREFIX."_extensions".$ADD."
 172 ORDER BY ext_name", __FILE__, __LINE__);
 173         }
 174 }
 175
 176 // Array for removed but not uninstalled extensions
 177 $DEL = array();
 178
 179 // At least one found?
 180 if ((SQL_NUMROWS($res_ext_crt) > 0) && (($cacheMode == "init") || ($cacheMode == "no")) && ($CSS != "1") && ($CSS != "-1")) {
 181         // Load theme management
 182         require_once(PATH."inc/theme-manager.php");
 183
 184         // If we need to init the cache init it now
 185         if ($cacheMode == "init") $cacheInstance->cache_init("EXTENSIONS");
 186
 187         // Extensions are registered so we load them
 188         while (list($EXT_ID, $name, $lang, $css, $active, $version) = SQL_FETCHROW($res_ext_crt)) {
 189                 // Get menu entry
 190                 $menu = "N";
 191                 if (MODULE_HAS_MENU($name, true)) {
 192                         $menu = "Y";
 193                 } // END - if
 194
 195                 // Load extensions
 196                 $file1 = sprintf("%sinc/extensions/ext-%s.php", PATH, $name);
 197                 $file2 = $file1; $EXT_CSS = "N"; $EXT_ALWAYS_ACTIVE = "N";
 198
 199                 // Special functions file
 200                 $file3 = sprintf("%sinc/libs/%s_functions.php", PATH, $name);
 201
 202                 // Does the extension file exists?
 203                 if (FILE_READABLE($file1)) {
 204                         // If there's no language file specified we don't need to load one... ;-)
 205                         if (!empty($lang)) {
 206                                 // Create language file
 207                                 $file2 = sprintf("%sinc/language/%s_%s.php", PATH, $lang, GET_LANGUAGE());
 208                         }
 209
 210                         if (FILE_READABLE($file3)) {
 211                                 // Special functions file
 212                                 $funcs = "Y";
 213                                 require_once($file3);
 214                         } else {
 215                                 // Don't load functions file
 216                                 $funcs = "N";
 217                         }
 218
 219                         // Do we need a language file?
 220                         if (($file1 != $file2) && (FILE_READABLE($file2))) {
 221                                 // Load language file
 222                                 $lang = "Y";
 223                                 include($file2);
 224                         } else {
 225                                 // Don't load language file
 226                                 $lang = "N";
 227                         }
 228
 229                         // Load extension
 230                         if ($name != "sql_patches") {
 231                                 // Load extension's file
 232                                 include_once($file1);
 233                         } else {
 234                                 // KEEP sql_patches ALWAYS ACTIVE!
 235                                 $EXT_ALWAYS_ACTIVE = "Y";
 236                         }
 237
 238                         if ($css == "Y") {
 239                                 $CSS_FILE = sprintf("%stheme/%s/css/%s.css", PATH, GET_CURR_THEME(), $name);
 240                                 if (FILE_READABLE($CSS_FILE)) {
 241                                         // CSS file for extension was found (use only relative path for now!)
 242                                         $EXT_CSS_FILES[] = $name.".css";
 243                                 } else {
 244                                         // Don't load CSS file
 245                                         $css = "N";
 246                                 }
 247                         } // END - if
 248
 249                         // Add cache row
 250                         if ($cacheMode == "init") {
 251                                 $cacheInstance->add_row(array(
 252                                         'ext_id'      => $EXT_ID,
 253                                         'ext_name'    => $name,
 254                                         'ext_lang'    => $lang,
 255                                         'ext_css'     => $css,
 256                                         'ext_menu'    => $menu,
 257                                         'ext_funcs'   => $funcs,
 258                                         'ext_active'  => $active,
 259                                         'ext_version' => $version,
 260                                         'ext_keep'    => $EXT_ALWAYS_ACTIVE,
 261                                 ));
 262                         } elseif ($cacheMode == "no") {
 263                                 // Remember this value for later usage
 264                                 $cacheArray['active_extensions'][$name] = $EXT_ALWAYS_ACTIVE;
 265                         }
 266                 } elseif (!FILE_READABLE($file1)) {
 267                         // Deleted extension file so we mark it for removal from DB
 268                         $DEL[] = $name;
 269                 }
 270         } // END - while
 271
 272         if ($cacheMode == "init") {
 273                 // Close cache file
 274                 $cacheInstance->cache_close();
 275
 276                 // Load more cache files (like admins)
 277                 require_once(PATH."inc/load_cache.php");
 278         } // END - if
 279 }
 280
 281 // Free memory
 282 SQL_FREERESULT($res_ext_crt);
 283
 284 // Load include files
 285 if (!empty($INC_POOL[0])) {
 286         foreach ($INC_POOL as $inc) {
 287                 require_once($inc);
 288         } // END - foreach
 289 } // END - if
 290
 291 // Uninstall extensions that are no longer in our system
 292 if (!empty($DEL[0])) {
 293         // Remove extensions from two tables: extension registry and tasks table
 294         foreach ($DEL as $name) {
 295                 // First remove entry from extensions table
 296                 $result = SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
 297                  array($name), __FILE__, __LINE__);
 298
 299                 // Remove (maybe?) found tasks (main task and possible updates
 300                 $result = SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_task_system WHERE subject LIKE '[%s:] %' AND (task_type='EXTENSION' OR task_type='EXTENSION_UPDATE')",
 301                  array($name), __FILE__, __LINE__);
 302         } // END - foreach
 303
 304         // I think it's not neccessary to run the optimization function here
 305         // because we didn't delete so much data from database. Can you aggree?
 306 } // END - if
 307
 308 //
 309 ?>