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         $cacheMode = "no";
  79 }
  80
  81 if ($cacheMode == "load") {
  82         // Load more cache files (like admins)
  83         require_once(PATH."inc/load_cache.php");
  84
  85         // Re-initialize handler
  86         $cacheInstance->cache_file("extensions", true);
  87
  88         // Load extension data from cache file
  89         $EXT_DUMMY = $cacheInstance->cache_load();
  90         foreach ($EXT_DUMMY['ext_name'] as $k=>$name) {
  91                 // Load functions file
  92                 if ($EXT_DUMMY['ext_funcs'][$k] == "Y") require_once(PATH."inc/libs/".$name."_functions.php");
  93
  94                 // Load Language file
  95                 if ($EXT_DUMMY['ext_lang'][$k] == "Y") {
  96                         $INC = sprintf("%sinc/language/%s_%s.php", PATH, $name, GET_LANGUAGE());
  97                         if (file_exists($INC)) require_once($INC);
  98                 }
  99
 100                 // Load CSS file
 101                 if ($EXT_DUMMY['ext_css'][$k] == "Y") $EXT_CSS_FILES[] = "".$name.".css";
 102
 103                 // Load extension file itself
 104                 if (($EXT_DUMMY['ext_active'][$k] == "Y") || ($EXT_DUMMY['ext_keep'][$k] == "Y") || (IS_ADMIN())) {
 105                         require_once(PATH."inc/extensions/ext-".$name.".php");
 106                 }
 107
 108                 // Transfer version number and active status
 109                 $EXT_DUMMY['ext_version'][$name] = $EXT_DUMMY['ext_version'][$k];
 110                 unset($EXT_DUMMY['ext_version'][$k]);
 111                 $EXT_DUMMY['ext_active'][$name] = $EXT_DUMMY['ext_active'][$k];
 112                 unset($EXT_DUMMY['ext_active'][$k]);
 113                 $EXT_DUMMY['ext_menu'][$name] = $EXT_DUMMY['ext_menu'][$k];
 114                 unset($EXT_DUMMY['ext_menu'][$k]);
 115                 $cacheArray['active_extensions']['$name'] = $EXT_DUMMY['ext_keep'][$k];
 116                 unset($EXT_DUMMY['ext_keep'][$k]);
 117                 $k2 = $EXT_DUMMY['ext_id'][$k];
 118                 $EXT_DUMMY['ext_id'][$k2] = $name;
 119                 if ($k2 != $k) unset($EXT_DUMMY['ext_id'][$k]);
 120
 121                 // Remove unneccessary data from memory
 122                 unset($EXT_DUMMY['ext_lang'][$k]);
 123                 unset($EXT_DUMMY['ext_css'][$k]);
 124                 unset($EXT_DUMMY['ext_funcs'][$k]);
 125         }
 126
 127         // Close cache file
 128         $cacheInstance->cache_close();
 129
 130         // Loading cache is done so let's free some memory!
 131         unset($EXT_DUMMY['ext_lang']);
 132         unset($EXT_DUMMY['ext_keep']);
 133         unset($EXT_DUMMY['ext_css']);
 134         unset($EXT_DUMMY['ext_funcs']);
 135         $cacheArray['extensions'] = $EXT_DUMMY;
 136         unset($EXT_DUMMY);
 137
 138         // No database load needed
 139         $res_ext_crt = false;
 140 } else {
 141         // If current user is not admin load only activated extensions
 142         // The admin shall use every available extension for testing purposes
 143         if ((!IS_ADMIN()) && ($cacheMode != "init")) $ADD = " WHERE ext_active='Y'";
 144
 145         if (GET_EXT_VERSION("sql_patches") >= "0.0.6") {
 146                 // Query with CSS file from DB
 147                 $res_ext_crt = SQL_QUERY("SELECT id, ext_name, ext_lang_file, ext_has_css, ext_active, ext_version
 148 FROM "._MYSQL_PREFIX."_extensions".$ADD."
 149 ORDER BY ext_name", __FILE__, __LINE__);
 150         } else {
 151                 // Old obsulete query string
 152                 $res_ext_crt = SQL_QUERY("SELECT id, ext_name, ext_lang_file, ext_name, ext_active, ext_version
 153 FROM "._MYSQL_PREFIX."_extensions".$ADD."
 154 ORDER BY ext_name", __FILE__, __LINE__);
 155         }
 156 }
 157
 158 // Array for removed but not uninstalled extensions
 159 $DEL = array();
 160
 161 // At least one found?
 162 if ((SQL_NUMROWS($res_ext_crt) > 0) && (($cacheMode == "init") || ($cacheMode == "no")) && ($CSS != "1") && ($CSS != "-1"))
 163 {
 164         // Load theme management
 165         require_once(PATH."inc/theme-manager.php");
 166
 167         // If we need to init the cache init it now
 168         if ($cacheMode == "init") $cacheInstance->cache_init("EXTENSIONS");
 169
 170         // Extensions are registered so we load them
 171         while (list($EXT_ID, $name, $lang, $css, $active, $version) = SQL_FETCHROW($res_ext_crt))
 172         {
 173                 // Get menu entry
 174                 $result_menu = SQL_QUERY_ESC("SELECT has_menu FROM "._MYSQL_PREFIX."_mod_reg WHERE module='%s' LIMIT 1",
 175                  array($name), __FILE__, __LINE__);
 176                 list($menu) = SQL_FETCHROW($result_menu);
 177                 //* DEBUG: */ echo "*".$name."/".$menu."*<br>";
 178
 179                 // An empty menu entry will be interpreted as N (no menu) to avoid problems
 180                 if (empty($menu)) $menu = "N";
 181
 182                 // Load extensions
 183                 $file1 = sprintf("%sinc/extensions/ext-%s.php", PATH, $name);
 184                 $file2 = $file1; $EXT_CSS = "N"; $EXT_ALWAYS_ACTIVE = "N";
 185
 186                 // Special functions file
 187                 $file3 = sprintf("%sinc/libs/%s_functions.php", PATH, $name);
 188
 189                 // Does the extension file exists?
 190                 if (file_exists($file1) && is_readable($file1))
 191                 {
 192                         // If there's no language file specified we don't need to load one... ;-)
 193                         if (!empty($lang)) {
 194                                 // Create language file
 195                                 $file2 = sprintf("%sinc/language/%s_%s.php", PATH, $lang, GET_LANGUAGE());
 196                         }
 197
 198                         if (file_exists($file3) && is_readable($file3))
 199                         {
 200                                 // Special functions file
 201                                 $funcs = "Y";
 202                                 require_once($file3);
 203                         }
 204                          else
 205                         {
 206                                 // Don't load functions file
 207                                 $funcs = "N";
 208                         }
 209
 210                         // Do we need a language file?
 211                         if (($file1 != $file2) && (file_exists($file2)) && (is_readable($file2)))
 212                         {
 213                                 // Load language file
 214                                 $lang = "Y";
 215                                 include($file2);
 216                         }
 217                          else
 218                         {
 219                                 // Don't load language file
 220                                 $lang = "N";
 221                         }
 222
 223                         // Load extension
 224                         if ($name != "sql_patches")
 225                         {
 226                                 // Load extension's file
 227                                 include_once($file1);
 228                         }
 229                          else
 230                         {
 231                                 // KEEP sql_patches ALWAYS ACTIVE!
 232                                 $EXT_ALWAYS_ACTIVE = "Y";
 233                         }
 234
 235                         if ($css == "Y")
 236                         {
 237                                 $CSS_FILE = sprintf("%stheme/%s/css/%s.css", PATH, GET_CURR_THEME(), $name);
 238                                 if (file_exists($CSS_FILE))
 239                                 {
 240                                         // CSS file for extension was found (use only relative path for now!)
 241                                         $EXT_CSS_FILES[] = $name.".css";
 242                                 }
 243                                  else
 244                                 {
 245                                         // Don't load CSS file
 246                                         $css = "N";
 247                                 }
 248                         }
 249
 250                         // Add cache row
 251                         if ($cacheMode == "init")
 252                         {
 253                                 $cacheInstance->add_row(array(
 254                                         'ext_id'      => $EXT_ID,
 255                                         'ext_name'    => $name,
 256                                         'ext_lang'    => $lang,
 257                                         'ext_css'     => $css,
 258                                         'ext_menu'    => $menu,
 259                                         'ext_funcs'   => $funcs,
 260                                         'ext_active'  => $active,
 261                                         'ext_version' => $version,
 262                                         'ext_keep'    => $EXT_ALWAYS_ACTIVE,
 263                                 ));
 264                         }
 265                          elseif ($cacheMode == "no")
 266                         {
 267                                 // Remember this value for later usage
 268                                 $cacheArray['active_extensions'][$name] = $EXT_ALWAYS_ACTIVE;
 269                         }
 270                 }
 271                  elseif (!file_exists($file1))
 272                 {
 273                         // Deleted extension file so we mark it for removal from DB
 274                         $DEL[] = $name;
 275                 }
 276         }
 277
 278         if ($cacheMode == "init")
 279         {
 280                 // Close cache file
 281                 $cacheInstance->cache_close();
 282
 283                 // Load more cache files (like admins)
 284                 require_once(PATH."inc/load_cache.php");
 285         }
 286 }
 287
 288 // Free memory
 289 SQL_FREERESULT($res_ext_crt);
 290
 291 // Load include files
 292 if (!empty($INC_POOL[0]))
 293 {
 294         foreach ($INC_POOL as $inc)
 295         {
 296                 require_once($inc);
 297         }
 298 }
 299
 300 // Uninstall extensions that are no longer in our system
 301 if (!empty($DEL[0]))
 302 {
 303         // Remove extensions from two tables: extension registry and tasks table
 304         foreach ($DEL as $name)
 305         {
 306                 // First remove entry from extensions table
 307                 $result = SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
 308                  array($name), __FILE__, __LINE__);
 309
 310                 // Remove (maybe?) found tasks (main task and possible updates
 311                 $result = SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_task_system WHERE subject LIKE '[%s:] %' AND (task_type='EXTENSION' OR task_type='EXTENSION_UPDATE')",
 312                  array($name), __FILE__, __LINE__);
 313         }
 314
 315         // I think it's not neccessary to run the optimization function here
 316         // because we didn't delete so much data from database. Can you aggree?
 317 }
 318 //
 319 ?>