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