inc/filters.php

   1 <?php
   2 /************************************************************************
   3  * MXChange v0.2.1                                    Start: 12/16/2008 *
   4  * ===============                              Last change: 12/16/2008 *
   5  *                                                                      *
   6  * -------------------------------------------------------------------- *
   7  * File              : filters.php                                      *
   8  * -------------------------------------------------------------------- *
   9  * Short description : Functions for filter system                      *
  10  * -------------------------------------------------------------------- *
  11  * Kurzbeschreibung  : Funktionen fuer Filter-System                    *
  12  * -------------------------------------------------------------------- *
  13  * $Revision::                                                        $ *
  14  * $Date::                                                            $ *
  15  * $Tag:: 0.2.1-FINAL                                                 $ *
  16  * $Author::                                                          $ *
  17  * Needs to be in all Files and every File needs "svn propset           *
  18  * svn:keywords Date Revision" (autoprobset!) at least!!!!!!            *
  19  * -------------------------------------------------------------------- *
  20  * Copyright (c) 2003 - 2008 by Roland Haeder                           *
  21  * For more information visit: http://www.mxchange.org                  *
  22  *                                                                      *
  23  * This program is free software; you can redistribute it and/or modify *
  24  * it under the terms of the GNU General Public License as published by *
  25  * the Free Software Foundation; either version 2 of the License, or    *
  26  * (at your option) any later version.                                  *
  27  *                                                                      *
  28  * This program is distributed in the hope that it will be useful,      *
  29  * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
  30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
  31  * GNU General Public License for more details.                         *
  32  *                                                                      *
  33  * You should have received a copy of the GNU General Public License    *
  34  * along with this program; if not, write to the Free Software          *
  35  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,               *
  36  * MA  02110-1301  USA                                                  *
  37  ************************************************************************/
  38
  39 // Some security stuff...
  40 if (!defined('__SECURITY')) {
  41         $INC = substr(dirname(__FILE__), 0, strpos(dirname(__FILE__), '/inc') + 4) . '/security.php';
  42         require($INC);
  43 }
  44
  45 // Init "generic filter system"
  46 function initFilterSystem () {
  47         // Is the filter already initialized?
  48         if ((isset($GLOBALS['filters']['chains'])) && (is_array($GLOBALS['filters']['chains']))) {
  49                 // Then abort here
  50                 debug_report_bug(getMessage('FILTER_FAILED_ALREADY_INIT'));
  51         } // END - if
  52
  53         // Init the filter system (just some ideas)
  54         $GLOBALS['filters']['chains'] = array(
  55                 'preinit'   => array(), // Filters for pre-init phase
  56                 'postinit'  => array(), // Filters for post-init phase
  57                 'shutdown'  => array()  // Filters for shutdown phase
  58         );
  59
  60         // Init loaded filters and counter
  61         $GLOBALS['filters']['loaded'] =  array();
  62         $GLOBALS['filters']['counter'] = array();
  63
  64         // Load all saved filers if sql_patches is updated
  65         if (isset($GLOBALS['cache_array']['filter']['filter_name'])) {
  66                 // Found in cache so rewrite the array
  67                 $filterArray = array();
  68                 foreach ($GLOBALS['cache_array']['filter']['filter_name'] as $idx => $filterName) {
  69                         // Get filter function
  70                         $filterFunction = $GLOBALS['cache_array']['filter']['filter_function'][$idx];
  71
  72                         // Add the element with mapped index
  73                         $filterArray['counter'][$filterName][$filterFunction] = $GLOBALS['cache_array']['filter']['filter_counter'][$idx];
  74                         $filterArray['loaded'][$filterName][$filterFunction]  = true;
  75                         $filterArray['chains'][$filterName][$filterFunction]  = $GLOBALS['cache_array']['filter']['filter_active'][$idx];
  76                 } // END - foreach
  77
  78                 // Set the array
  79                 //die('<pre>'.print_r($filterArray, true).'</pre>');
  80                 $GLOBALS['filters'] = $filterArray;
  81
  82                 // Remove the cache
  83                 unset($GLOBALS['cache_array']['filter']);
  84         } elseif (GET_EXT_VERSION('sql_patches') >= '0.5.9') {
  85                 // Init add
  86                 $add = '';
  87                 if (GET_EXT_VERSION('sql_patches') >= '0.6.0') $add = ", `filter_counter`";
  88
  89                 // Load all active filers
  90                 $result = SQL_QUERY("SELECT `filter_name`,`filter_function`,`filter_active`".$add."
  91 FROM `{!_MYSQL_PREFIX!}_filters`
  92 ORDER BY `filter_id` ASC", __FUNCTION__, __LINE__);
  93
  94                 // Are there entries?
  95                 if (SQL_NUMROWS($result) > 0) {
  96                         // Load all filters
  97                         while ($filterArray = SQL_FETCHARRAY($result)) {
  98                                 // Get filter name and function
  99                                 $filterName     = $filterArray['filter_name'];
 100                                 $filterFunction = $filterArray['filter_function'];
 101
 102                                 // Set counter to default
 103                                 $GLOBALS['filters']['counter'][$filterName][$filterFunction] = 0;
 104
 105                                 // Mark this filter as loaded (from database)
 106                                 $GLOBALS['filters']['loaded'][$filterName][$filterFunction] = true;
 107
 108                                 // Set this filter
 109                                 $GLOBALS['filters']['chains'][$filterName][$filterFunction] = $filterArray['filter_active'];
 110
 111                                 // Is the array element for counter there?
 112                                 if (isset($filterArray['filter_counter'])) {
 113                                         // Then use this value!
 114                                         $GLOBALS['filters']['counter'][$filterName][$filterFunction] = $filterArray['filter_counter'];
 115                                 } // END - if
 116                         } // END - while
 117                 } // END - if
 118
 119                 // Free result
 120                 SQL_FREERESULT($result);
 121         }
 122
 123         // Init filters
 124         registerFilter('init', 'UPDATE_LOGIN_DATA');
 125         registerFilter('init', 'INIT_RANDOMIZER');
 126         registerFilter('init', 'DETERMINE_USERNAME');
 127
 128         // Login failures handler
 129         registerFilter('post_youhere_line', 'CALL_HANDLER_LOGIN_FAILTURES');
 130
 131         // Filters for pre-extension-registration
 132         registerFilter('pre_extension_installed', 'RUN_SQLS');
 133
 134         // Filters for post-extension-registration
 135         registerFilter('post_extension_installed', 'AUTO_ACTIVATE_EXTENSION');
 136         registerFilter('post_extension_installed', 'SOLVE_TASK');
 137         registerFilter('post_extension_installed', 'LOAD_INCLUDES');
 138         registerFilter('post_extension_installed', 'REMOVE_UPDATES');
 139
 140         // Solving tasks
 141         registerFilter('solve_task', 'SOLVE_TASK');
 142
 143         // Loading includes in general
 144         registerFilter('load_includes', 'LOAD_INCLUDES');
 145
 146         // Run SQLs
 147         registerFilter('run_sqls', 'RUN_SQLS');
 148
 149         // Admin ACL check
 150         registerFilter('check_admin_acl', 'CHECK_ADMIN_ACL');
 151
 152         // Register shutdown filters
 153         registerFilter('shutdown', 'FLUSH_FILTERS');
 154 }
 155
 156 // "Registers" a new filter function
 157 function registerFilter ($filterName, $filterFunction, $silentAbort = true, $force = false, $dry_run = false) {
 158         // Extend the filter function name
 159         $filterFunction = sprintf("FILTER_%s", strtoupper($filterFunction));
 160
 161         // Is that filter already there?
 162         if ((isset($GLOBALS['filters']['chains'][$filterName][$filterFunction])) && (!$force)) {
 163                 // Then abort here
 164                 if ($silentAbort === false) {
 165                         addFatalMessage(__FUNCTION__, __LINE__, getMessage('FILTER_FAILED_ALREADY_ADDED'), array($filterFunction, $filterName));
 166                 } // END - if
 167
 168                 // Abort here
 169                 return false;
 170         } // END - if
 171
 172         // Is the function there?
 173         if (!function_exists($filterFunction)) {
 174                 // Then abort here
 175                 addFatalMessage(__FUNCTION__, __LINE__, getMessage('FILTER_FAILED_NOT_FOUND'), array($filterFunction, $filterName));
 176                 return false;
 177         } // END - if
 178
 179         // Shall we add it?
 180         if (!$dry_run) {
 181                 // Simply add it to the array
 182                 $GLOBALS['filters']['chains'][$filterName][$filterFunction] = 'Y';
 183                 $GLOBALS['filters']['counter'][$filterName][$filterFunction] = 0;
 184         } // END - if
 185 }
 186
 187 // "Unregisters" a filter from the given chain
 188 function unregisterFilter ($filterName, $filterFunction, $force = false, $dry_run = false) {
 189         // Extend the filter function name only if not loaded from database
 190         if (!isset($GLOBALS['filters']['loaded'][$filterName][$filterFunction])) {
 191                 $filterFunction = sprintf("FILTER_%s", strtoupper($filterFunction));
 192         } // END - if
 193
 194         // Is that filter there?
 195         if ((!isset($GLOBALS['filters']['chains'][$filterName][$filterFunction])) && (!$force)) {
 196                 // Not found, so abort here
 197                 addFatalMessage(__FUNCTION__, __LINE__, getMessage('FILTER_FAILED_NOT_REMOVED'), array($filterFunction, $filterName));
 198                 return false;
 199         } // END - if
 200
 201         // Shall we remove? (default, not while just showing an extension removal)
 202         if ($dry_run === false) {
 203                 // Mark for filter removal
 204                 $GLOBALS['filters']['chains'][$filterName][$filterFunction] = 'R';
 205         } // END  - if
 206 }
 207
 208 // "Runs" the given filters, data is optional and can be any type of data
 209 function runFilterChain ($filterName, $data = null) {
 210         // Is that filter chain there?
 211         if (!isset($GLOBALS['filters']['chains'][$filterName])) {
 212                 // We should find all these non-existing filter chains
 213                 DEBUG_LOG(__FUNCTION__, __LINE__, 'Filter chain ' . $filterName . ' not found!');
 214
 215                 // Abort here
 216                 return false;
 217         } // END - if
 218
 219         // Default return value
 220         $returnValue = $data;
 221
 222         // Then run all filters
 223         foreach ($GLOBALS['filters']['chains'][$filterName] as $filterFunction => $active) {
 224                 // Debug message
 225                 //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "Running: name={$filterName},func={$filterFunction},active={$active}");
 226
 227                 // Is the filter active?
 228                 if (($active == 'Y') || ((in_array($filterName, array('extension_remove', 'post_extension_run_sql'))) && ($active == 'R'))) {
 229                         // Is this filter there?
 230                         if (!function_exists($filterFunction)) {
 231                                 // Unregister it
 232                                 unregisterFilter($filterName, $filterFunction);
 233
 234                                 // Skip this entry
 235                                 continue;
 236                         } // END - if
 237
 238                         // Call the filter chain
 239                         $returnValue = call_user_func_array($filterFunction, array($returnValue));
 240
 241                         // Update usage counter
 242                         countFilterUsage($filterName, $filterFunction);
 243                 } elseif (isDebugModeEnabled()) {
 244                         // Debug message
 245                         DEBUG_LOG(__FUNCTION__, __LINE__, "Skipped: name={$filterName},func={$filterFunction},active={$active}");
 246                 }
 247         } // END - foreach
 248
 249         // Return the filtered content
 250         return $returnValue;
 251 }
 252
 253 // Count the filter usage
 254 function countFilterUsage ($filterName, $filterFunction) {
 255         // Is it there?
 256         if (isset($GLOBALS['filters']['counter'][$filterName][$filterFunction])) {
 257                 // Yes, then increase
 258                 $GLOBALS['filters']['counter'][$filterName][$filterFunction]++;
 259         } else {
 260                 // No, then create
 261                 $GLOBALS['filters']['counter'][$filterName][$filterFunction] = 1;
 262         }
 263 }
 264
 265 // -----------------------------------------------------------------------------
 266 // Generic filter functions we always need
 267 // -----------------------------------------------------------------------------
 268
 269 // Filter for flushing all new filters to the database
 270 function FILTER_FLUSH_FILTERS () {
 271         // Clear all previous SQL queries
 272         INIT_SQLS();
 273
 274         // Are we installing?
 275         if ((isInstalling()) || (!isInstalled())) {
 276                 // Then silently skip this filter
 277                 return true;
 278         } // END - if
 279
 280         // Is a database link here and not in installation mode?
 281         if ((!SQL_IS_LINK_UP()) && (!isInstalling())) {
 282                 // Abort here
 283                 addFatalMessage(__FUNCTION__, __LINE__, getMessage('FILTER_FLUSH_FAILED_NO_DATABASE'));
 284                 return false;
 285         } // END - if
 286
 287         // Is the extension sql_patches updated?
 288         if (EXT_VERSION_IS_OLDER('sql_patches', '0.5.9')) {
 289                 // Abort silently here
 290                 return false;
 291         } // END - if
 292
 293         // Nothing is added/remove by default
 294         $inserted = 0;
 295         $removed = 0;
 296
 297         // Prepare SQL queries
 298         $insertSQL = "INSERT INTO `{!_MYSQL_PREFIX!}_filters` (`filter_name`,`filter_function`,`filter_active`) VALUES";
 299         $removeSQL = "DELETE LOW_PRIORITY FROM `{!_MYSQL_PREFIX!}_filters` WHERE";
 300
 301         // Write all filters to database
 302         foreach ($GLOBALS['filters']['chains'] as $filterName => $filterArray) {
 303                 // Walk through all filters
 304                 foreach ($filterArray as $filterFunction => $active) {
 305                         // Is this filter loaded?
 306                         if (!isset($GLOBALS['filters']['loaded'][$filterName][$filterFunction])) {
 307                                 // Add this filter (all filters are active by default)
 308                                 $insertSQL .= sprintf("('%s','%s','Y'),", $filterName, $filterFunction);
 309                                 $inserted++;
 310                         } elseif ($active == 'R') {
 311                                 // Remove this filter
 312                                 $removeSQL .= sprintf(" (`filter_name`='%s' AND `filter_function`='%s') OR", $filterName, $filterFunction);
 313                                 $removed++;
 314                         }
 315                 } // END - foreach
 316         } // END - foreach
 317
 318         // Something has been added?
 319         if ($inserted > 0) {
 320                 // Finish SQL command
 321                 $insertSQL = substr($insertSQL, 0, -1);
 322
 323                 // And run it
 324                 ADD_SQL($insertSQL);
 325         } // END - if
 326
 327         // Something has been removed?
 328         if ($removed > 0) {
 329                 // Finish SQL command
 330                 $removeSQL = substr($removeSQL, 0, -2) . 'LIMIT '.$removed;
 331
 332                 // And run it
 333                 ADD_SQL($removeSQL);
 334         } // END - if
 335
 336         // Shall we update usage counters (ONLY FOR DEBUGGING!)
 337         if (getConfig('update_filter_usage') == 'Y') {
 338                 // Update all counters
 339                 foreach ($GLOBALS['filters']['counter'] as $filterName => $filterArray) {
 340                         // Walk through all filters
 341                         foreach ($filterArray as $filterFunction => $cnt) {
 342                                 // Construct and add the query
 343                                 ADD_SQL(sprintf("UPDATE `{!_MYSQL_PREFIX!}_filters` SET `filter_counter`=%s WHERE `filter_name`='%s' AND `filter_function`='%s' LIMIT 1",
 344                                         bigintval($cnt),
 345                                         $filterName,
 346                                         $filterFunction
 347                                 ));
 348                         } // END - foreach
 349                 } // END - foreach
 350         } // END - if
 351
 352         // Run the run_sqls filter in non-dry mode
 353         runFilterChain('run_sqls');
 354 }
 355
 356 // Filter for calling the handler for login failures
 357 function FILTER_CALL_HANDLER_LOGIN_FAILTURES ($data) {
 358         // Init content
 359         $content = $data;
 360
 361         // Handle failed logins here if not in guest
 362         //* DEBUG: */ OUTPUT_HTML(__FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>):type={$data['type']},action={getAction()},what={getWhat()},lvl={$data['access_level']}<br />");
 363         if ((($data['type'] == 'what') || ($data['type'] == 'action') && ((!isWhatSet()) || (getWhat() == 'overview') || (getWhat() == getConfig('index_home')))) && ($data['access_level'] != 'guest') && ((GET_EXT_VERSION('sql_patches') >= '0.4.7') || (GET_EXT_VERSION('admins') >= '0.7.0'))) {
 364                 // Handle failure
 365                 $content['content'] .= HANDLE_LOGIN_FAILTURES($data['access_level']);
 366         } // END - if
 367
 368         // Return the content
 369         return $content;
 370 }
 371
 372 // Filter for redirecting to logout if sql_patches has been installed
 373 function FILTER_REDIRECT_TO_LOGOUT_SQL_PATCHES () {
 374         // Remove this filter
 375         unregisterFilter('shutdown', __FUNCTION__);
 376
 377         // Is the element set?
 378         if (isset($GLOBALS['ext_load_mode'])) {
 379                 // Redirect here
 380                 redirectToUrl('modules.php?module=admin&amp;logout=1&amp;' . $GLOBALS['ext_load_mode'] . '=sql_patches');
 381         } // END - if
 382
 383         // This should not happen!
 384         DEBUG_LOG(__FUNCTION__, __LINE__, 'Cannot auto-logout because no extension load-mode has been set.');
 385 }
 386
 387 // Filter for auto-activation of a extension
 388 function FILTER_AUTO_ACTIVATE_EXTENSION ($data) {
 389         // Is this extension always activated?
 390         if (EXT_GET_ALWAYS_ACTIVE() == 'Y') {
 391                 // Then activate the extension
 392                 //* DEBUG: */ OUTPUT_HTML(__FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>): ext_name={$data['ext_name']}<br />");
 393                 ACTIVATE_EXTENSION($data['ext_name']);
 394         } // END - if
 395
 396         // Return the data
 397         return $data;
 398 }
 399
 400 // Filter for solving task given task
 401 function FILTER_SOLVE_TASK ($data) {
 402         // Don't solve anything if no admin!
 403         if (!IS_ADMIN()) return $data;
 404
 405         // Is this a direct task id or array element task_id is found?
 406         if (is_int($data)) {
 407                 // Then solve it...
 408                 ADMIN_SOLVE_TASK($data);
 409         } elseif ((is_array($data)) && (isset($data['task_id']))) {
 410                 // Solve it...
 411                 ADMIN_SOLVE_TASK($data['task_id']);
 412         }
 413
 414         // Return the data
 415         return $data;
 416 }
 417
 418 // Filter to load include files
 419 function FILTER_LOAD_INCLUDES () {
 420         // Default is $data as inclusion list
 421         $data = GET_INC_POOL();
 422
 423         // Is it an array?
 424         if ((!isset($data)) || (!is_array($data))) {
 425                 // Then abort here
 426                 debug_report_bug(sprintf("INC_POOL is no array! Type: %s", gettype($data)));
 427         } elseif (isset($data['inc_pool'])) {
 428                 // Use this as new inclusion pool!
 429                 SET_INC_POOL($data['inc_pool']);
 430         }
 431
 432         // Check for added include files
 433         if (COUNT_INC_POOL() > 0) {
 434                 // Loads every include file
 435                 foreach (GET_INC_POOL() as $FQFN) {
 436                         loadIncludeOnce($FQFN);
 437                 } // END - foreach
 438
 439                 // Reset array
 440                 INIT_INC_POOL();
 441         } // END - if
 442
 443         // Continue with processing
 444         return $data;
 445 }
 446
 447 // Filter for running SQL commands
 448 function FILTER_RUN_SQLS ($data) {
 449         // Debug message
 450         //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "- Entered!");
 451
 452         // Is the array there?
 453         if ((IS_SQLS_VALID()) && ((!isset($data['dry_run'])) || ($data['dry_run'] == false))) {
 454                 // Run SQL commands
 455                 //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "- Found ".COUNT_SQLS()." queries to run.");
 456                 foreach (GET_SQLS() as $sql) {
 457                         // Trim spaces away
 458                         $sql = trim($sql);
 459
 460                         // Is there still a query left?
 461                         if (!empty($sql)) {
 462                                 // Do we have an "ALTER TABLE" command?
 463                                 if (substr(strtolower($sql), 0, 11) == "alter table") {
 464                                         // Analyse the alteration command
 465                                         //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "Alterting table: {$sql}");
 466                                         SQL_ALTER_TABLE($sql, __FUNCTION__, __LINE__);
 467                                 } else {
 468                                         // Run regular SQL command
 469                                         //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "Running regular query: {$sql}");
 470                                         SQL_QUERY($sql, __FUNCTION__, __LINE__, false);
 471                                 }
 472                         } // END - if
 473                 } // END - foreach
 474         } // END - if
 475
 476         // Debug message
 477         //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "- Left!");
 478 }
 479
 480 // Filter for updating/validating login data
 481 function FILTER_UPDATE_LOGIN_DATA () {
 482         // Add missing array
 483         if ((!isset($GLOBALS['last'])) || (!is_array($GLOBALS['last']))) $GLOBALS['last'] = array();
 484
 485         // Recheck if logged in
 486         if (!IS_MEMBER()) return false;
 487
 488         // Secure user ID
 489         setUserId(getSession('userid'));
 490
 491         // Load last module and last online time
 492         $result = SQL_QUERY_ESC("SELECT `last_module`, `last_online` FROM `{!_MYSQL_PREFIX!}_user_data` WHERE `userid`=%s LIMIT 1",
 493                 array(getUserId()), __FUNCTION__, __LINE__);
 494
 495         // Entry found?
 496         if (SQL_NUMROWS($result) == 1) {
 497                 // Load last module and online time
 498                 $DATA = SQL_FETCHARRAY($result);
 499
 500                 // Maybe first login time?
 501                 if (empty($DATA['last_module'])) $DATA['last_module'] = 'login';
 502
 503                 // This will be displayed on welcome page! :-)
 504                 if (empty($GLOBALS['last']['module'])) {
 505                         $GLOBALS['last']['module'] = $DATA['last_module']; $GLOBALS['last']['online'] = $DATA['last_online'];
 506                 } // END - if
 507
 508                 // 'what' not set?
 509                 if (!isWhatSet()) {
 510                         // Fix it to default
 511                         setWhat('welcome');
 512                         if (getConfig('index_home') != '') setWhatFromConfig('index_home');
 513                 } // END - if
 514
 515                 // Update last module / online time
 516                 SQL_QUERY_ESC("UPDATE `{!_MYSQL_PREFIX!}_user_data` SET `last_module`='%s', `last_online`=UNIX_TIMESTAMP(), `REMOTE_ADDR`='%s' WHERE `userid`=%s LIMIT 1",
 517                         array(
 518                                 getWhat(),
 519                                 detectRemoteAddr(),
 520                                 getUserId()
 521                         ), __FUNCTION__, __LINE__);
 522         }  else {
 523                 // Destroy session, we cannot update!
 524                 destroyUserSession();
 525         }
 526
 527         // Free the result
 528         SQL_FREERESULT($result);
 529 }
 530
 531 // Filter for checking admin ACL
 532 function FILTER_CHECK_ADMIN_ACL () {
 533         // Extension not installed so it's always allowed to access everywhere!
 534         $ret = true;
 535
 536         // Ok, Cookie-Update done
 537         if ((GET_EXT_VERSION('admins') >= '0.3.0') && (EXT_IS_ACTIVE('admins'))) {
 538                 // Check if action GET variable was set
 539                 $action = getAction();
 540                 if (isWhatSet()) {
 541                         // Get action value by what-value
 542                         $action = getModeAction('admin', getWhat());
 543                 } // END - if
 544
 545                 // Check for access control line of current menu entry
 546                 $ret = adminsCheckAdminAcl($action, getWhat());
 547         } // END - if
 548
 549         // Return result
 550         return $ret;
 551 }
 552
 553 // Filter for initializing randomizer
 554 function FILTER_INIT_RANDOMIZER () {
 555         // Simply init the randomizer with seed and _ADD value
 556         mt_srand(generateSeed() + getConfig('_ADD'));
 557 }
 558
 559 // Filter for removing updates
 560 function FILTER_REMOVE_UPDATES () {
 561         // Init removal list
 562         EXT_INIT_REMOVAL_LIST();
 563
 564         // Add the current extension to it
 565         EXT_ADD_CURRENT_TO_REMOVAL_LIST();
 566
 567         // Simply remove it
 568         UNSET_EXT_SQLS();
 569
 570         // Do we need to remove update depency?
 571         if (EXT_COUNT_UPDATE_DEPENDS() > 0) {
 572                 // Then find all updates we shall no longer execute
 573                 foreach (EXT_GET_UPDATE_DEPENDS() as $id=>$ext_name) {
 574                         // Shall we remove this update?
 575                         if (in_array($ext_name, EXT_GET_REMOVAL_LIST())) {
 576                                 // Then remove this extension!
 577                                 EXT_REMOVE_UPDATE_DEPENDS($ext_name);
 578                         } // END - if
 579                 } // END - foreach
 580         } // END - if
 581 }
 582
 583 // Determines username for current user state
 584 function FILTER_DETERMINE_USERNAME () {
 585         global $username;
 586
 587         // Check if logged in
 588         if (IS_MEMBER()) {
 589                 // Is still logged in so we welcome him with his name
 590                 $result = SQL_QUERY_ESC("SELECT `surname`, `family` FROM `{!_MYSQL_PREFIX!}_user_data` WHERE `userid`=%s LIMIT 1",
 591                         array(getUserId()), __FILE__, __LINE__);
 592                 if (SQL_NUMROWS($result) == 1) {
 593                         // Load surname and family's name and build the username
 594                         list($s, $f) = SQL_FETCHROW($result);
 595                         $username = $s . ' ' . $f;
 596
 597                         // Additionally admin?
 598                         if (IS_ADMIN()) {
 599                                 // Add it
 600                                 $username .= ' ({--_ADMIN_SHORT--})';
 601                         } // END - if
 602                 } else {
 603                         // Hmmm, logged in and no valid userid?
 604                         $username = '<em>{--_UNKNOWN--}</em>';
 605
 606                         // Destroy session
 607                         destroyUserSession();
 608
 609                         // Kill userid
 610                         setUserId(0);
 611                 }
 612
 613                 // Free memory
 614                 SQL_FREERESULT($result);
 615         } elseif (IS_ADMIN()) {
 616                 // Admin is there
 617                 $username = getMessage('_ADMIN');
 618         } else {
 619                 // He's a guest, hello there... ;-)
 620                 $username = getMessage('_GUEST');
 621         }
 622 }
 623
 624 //
 625 ?>