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 {
  64         // Load cache extension alone
  65         include_once(PATH."inc/libs/cache_functions.php");
  66         $cacheMode = "";
  67         include_once(PATH."inc/extensions/ext-cache.php");
  68         switch($cacheInstance->cache_file("extensions", true))
  69         {
  70                 case true : $cacheMode = "load"; break;
  71                 case false: $cacheMode = "init"; break;
  72         }
  73
  74         // Do not recreate cache file when it's switched off!
  75         if (($cacheMode == "init") && ($_CONFIG['cache_exts'] == 'N')) $cacheMode = "skip";
  76
  77         // Load language
  78         if ($cacheMode == "load") include(PATH."inc/language/cache_".GET_LANGUAGE().".php");
  79 } else {
  80         $cacheMode = "no";
  81 }
  82
  83 if ($cacheMode == "load")
  84 {
  85         // Load more cache files (like admins)
  86         require_once(PATH."inc/load_cache.php");
  87
  88         // Re-initialize handler
  89         $cacheInstance->cache_file("extensions", true);
  90
  91         // Load extension data from cache file
  92         $EXT_DUMMY = $cacheInstance->cache_load();
  93         foreach ($EXT_DUMMY['ext_name'] as $k=>$name)
  94         {
  95                 // Load functions file
  96                 if ($EXT_DUMMY['ext_funcs'][$k] == 'Y') require_once(PATH."inc/libs/".$name."_functions.php");
  97
  98                 // Load Language file
  99                 if ($EXT_DUMMY['ext_lang'][$k] == 'Y')
 100                 {
 101                         $INC = sprintf(PATH."inc/language/%s_%s.php", $name, GET_LANGUAGE());
 102                         if (file_exists($INC)) require_once($INC);
 103                 }
 104
 105                 // Load CSS file
 106                 if ($EXT_DUMMY['ext_css'][$k] == 'Y') $EXT_CSS_FILES[] = "".$name.".css";
 107
 108                 // Load extension file itself
 109                 if (($EXT_DUMMY['ext_active'][$k] == 'Y') || ($EXT_DUMMY['ext_keep'][$k] == 'Y') || (IS_ADMIN()))
 110                 {
 111                         require_once(PATH."inc/extensions/ext-".$name.".php");
 112                 }
 113
 114                 // Transfer version number and active status
 115                 $EXT_DUMMY['ext_version'][$name] = $EXT_DUMMY['ext_version'][$k];
 116                 unset($EXT_DUMMY['ext_version'][$k]);
 117                 $EXT_DUMMY['ext_active'][$name] = $EXT_DUMMY['ext_active'][$k];
 118                 unset($EXT_DUMMY['ext_active'][$k]);
 119                 $EXT_DUMMY['ext_menu'][$name] = $EXT_DUMMY['ext_menu'][$k];
 120                 unset($EXT_DUMMY['ext_menu'][$k]);
 121                 $cacheArray['active_extensions']['$name'] = $EXT_DUMMY['ext_keep'][$k];
 122                 unset($EXT_DUMMY['ext_keep'][$k]);
 123                 $k2 = $EXT_DUMMY['ext_id'][$k];
 124                 $EXT_DUMMY['ext_id'][$k2] = $name;
 125                 if ($k2 != $k) unset($EXT_DUMMY['ext_id'][$k]);
 126
 127                 // Remove unneccessary data from memory
 128                 unset($EXT_DUMMY['ext_lang'][$k]);
 129                 unset($EXT_DUMMY['ext_css'][$k]);
 130                 unset($EXT_DUMMY['ext_funcs'][$k]);
 131         }
 132
 133         // Close cache file
 134         $cacheInstance->cache_close();
 135
 136         // Loading cache is done so let's free some memory!
 137         unset($EXT_DUMMY['ext_lang']);
 138         unset($EXT_DUMMY['ext_keep']);
 139         unset($EXT_DUMMY['ext_css']);
 140         unset($EXT_DUMMY['ext_funcs']);
 141         $cacheArray['extensions'] = $EXT_DUMMY;
 142         unset($EXT_DUMMY);
 143
 144         // No database load needed
 145         $res_ext_crt = false;
 146 }
 147  else
 148 {
 149         // If current user is not admin load only activated extensions
 150         // The admin shall use every available extension for testing purposes
 151         if ((!IS_ADMIN()) && ($cacheMode != "init")) $ADD = " WHERE ext_active='Y'";
 152
 153         if (GET_EXT_VERSION("sql_patches") >= "0.0.6")
 154         {
 155                 // Query with CSS file from DB
 156                 $res_ext_crt = SQL_QUERY("SELECT id, ext_name, ext_lang_file, ext_has_css, ext_active, ext_version
 157 FROM "._MYSQL_PREFIX."_extensions".$ADD."
 158 ORDER BY ext_name", __FILE__, __LINE__);
 159         }
 160          else
 161         {
 162                 // Old obsulete query string
 163                 $res_ext_crt = SQL_QUERY("SELECT id, ext_name, ext_lang_file, ext_name, ext_active, ext_version
 164 FROM "._MYSQL_PREFIX."_extensions".$ADD."
 165 ORDER BY ext_name", __FILE__, __LINE__);
 166         }
 167 }
 168
 169 // Array for removed but not uninstalled extensions
 170 $DEL = array();
 171
 172 // At least one found?
 173 if ((SQL_NUMROWS($res_ext_crt) > 0) && (($cacheMode == "init") || ($cacheMode == "no")) && ($CSS != "1") && ($CSS != "-1"))
 174 {
 175         // Load theme management
 176         require_once(PATH."inc/theme-manager.php");
 177
 178         // If we need to init the cache init it now
 179         if ($cacheMode == "init") $cacheInstance->cache_init("EXTENSIONS");
 180
 181         // Extensions are registered so we load them
 182         while (list($EXT_ID, $name, $lang, $css, $active, $version) = SQL_FETCHROW($res_ext_crt))
 183         {
 184                 // Get menu entry
 185                 $result_menu = SQL_QUERY_ESC("SELECT has_menu FROM "._MYSQL_PREFIX."_mod_reg WHERE module='%s' LIMIT 1",
 186                  array($name), __FILE__, __LINE__);
 187                 list($menu) = SQL_FETCHROW($result_menu);
 188                 //* DEBUG: */ echo "*".$name."/".$menu."*<br>";
 189
 190                 // An empty menu entry will be interpreted as N (no menu) to avoid problems
 191                 if (empty($menu)) $menu = 'N';
 192
 193                 // Load extensions
 194                 $file1 = sprintf(PATH."inc/extensions/ext-%s.php", $name);
 195                 $file2 = $file1; $EXT_CSS = 'N'; $EXT_ALWAYS_ACTIVE = 'N';
 196
 197                 // Special functions file
 198                 $file3 = sprintf(PATH."inc/libs/%s_functions.php", $name);
 199
 200                 // Does the extension file exists?
 201                 if (file_exists($file1) && is_readable($file1))
 202                 {
 203                         // If there's no language file specified we don't need to load one... ;-)
 204                         if (!empty($lang)) {
 205                                 // Create language file
 206                                 $file2 = sprintf(PATH."inc/language/%s_%s.php", $lang, GET_LANGUAGE());
 207                         }
 208
 209                         if (file_exists($file3) && is_readable($file3))
 210                         {
 211                                 // Special functions file
 212                                 $funcs = 'Y';
 213                                 require_once($file3);
 214                         }
 215                          else
 216                         {
 217                                 // Don't load functions file
 218                                 $funcs = 'N';
 219                         }
 220
 221                         // Do we need a language file?
 222                         if (($file1 != $file2) && (file_exists($file2)) && (is_readable($file2)))
 223                         {
 224                                 // Load language file
 225                                 $lang = 'Y';
 226                                 include($file2);
 227                         }
 228                          else
 229                         {
 230                                 // Don't load language file
 231                                 $lang = 'N';
 232                         }
 233
 234                         // Load extension
 235                         if ($name != "sql_patches")
 236                         {
 237                                 // Load extension's file
 238                                 include_once($file1);
 239                         }
 240                          else
 241                         {
 242                                 // KEEP sql_patches ALWAYS ACTIVE!
 243                                 $EXT_ALWAYS_ACTIVE = 'Y';
 244                         }
 245
 246                         if ($css == 'Y')
 247                         {
 248                                 $CSS_FILE = PATH."theme/".GET_CURR_THEME()."/css/".$name.".css";
 249                                 if (file_exists($CSS_FILE))
 250                                 {
 251                                         // CSS file for extension was found (use only relative path for now!)
 252                                         $EXT_CSS_FILES[] = $name.".css";
 253                                 }
 254                                  else
 255                                 {
 256                                         // Don't load CSS file
 257                                         $css = 'N';
 258                                 }
 259                         }
 260
 261                         // Add cache row
 262                         if ($cacheMode == "init")
 263                         {
 264                                 $cacheInstance->add_row(array(
 265                                         'ext_id'      => $EXT_ID,
 266                                         'ext_name'    => $name,
 267                                         'ext_lang'    => $lang,
 268                                         'ext_css'     => $css,
 269                                         'ext_menu'    => $menu,
 270                                         'ext_funcs'   => $funcs,
 271                                         'ext_active'  => $active,
 272                                         'ext_version' => $version,
 273                                         'ext_keep'    => $EXT_ALWAYS_ACTIVE,
 274                                 ));
 275                         }
 276                          elseif ($cacheMode == "no")
 277                         {
 278                                 // Remember this value for later usage
 279                                 $cacheArray['active_extensions'][$name] = $EXT_ALWAYS_ACTIVE;
 280                         }
 281                 }
 282                  elseif (!file_exists($file1))
 283                 {
 284                         // Deleted extension file so we mark it for removal from DB
 285                         $DEL[] = $name;
 286                 }
 287         }
 288
 289         if ($cacheMode == "init")
 290         {
 291                 // Close cache file
 292                 $cacheInstance->cache_close();
 293
 294                 // Load more cache files (like admins)
 295                 require_once(PATH."inc/load_cache.php");
 296         }
 297 }
 298
 299 // Free memory
 300 SQL_FREERESULT($res_ext_crt);
 301
 302 // Load include files
 303 if (!empty($INC_POOL[0]))
 304 {
 305         foreach ($INC_POOL as $inc)
 306         {
 307                 require_once($inc);
 308         }
 309 }
 310
 311 // Uninstall extensions that are no longer in our system
 312 if (!empty($DEL[0]))
 313 {
 314         // Remove extensions from two tables: extension registry and tasks table
 315         foreach ($DEL as $name)
 316         {
 317                 // First remove entry from extensions table
 318                 $result = SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
 319                  array($name), __FILE__, __LINE__);
 320
 321                 // Remove (maybe?) found tasks (main task and possible updates
 322                 $result = SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_task_system WHERE subject LIKE '[%s:] %' AND (task_type='EXTENSION' OR task_type='EXTENSION_UPDATE')",
 323                  array($name), __FILE__, __LINE__);
 324         }
 325
 326         // I think it's not neccessary to run the optimization function here
 327         // because we didn't delete so much data from database. Can you aggree?
 328 }
 329 //
 330 ?>