includes/SpecialValidate.php

   1 <?php
   2 # Copyright (C) 2004 Magnus Manske <magnus.manske@web.de>
   3 # http://www.mediawiki.org/
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License along
  16 # with this program; if not, write to the Free Software Foundation, Inc.,
  17 # 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18 # http://www.gnu.org/copyleft/gpl.html
  19
  20 /**
  21  *
  22  */
  23
  24 /**
  25  *
  26  */
  27 class Validation {
  28
  29         function find_this_version( $article_title , &$article_time , &$id , &$tab ) {
  30                 $id = "";
  31                 $tab = "";
  32                 $sql = "SELECT cur_id,cur_timestamp FROM cur WHERE cur_namespace=0 AND cur_title='" . wfStrencode( $article_title ) . "'";
  33                 $res = wfQuery( $sql, DB_READ );
  34                 if( $s = wfFetchObject( $res ) ) {
  35                         if ( $article_time == "" ) {
  36                                 # No timestamp = current version
  37                                 $article_time = $s->cur_timestamp;
  38                         } elseif ( $article_time == $s->cur_timestamp ) {
  39                                 # Means current version
  40                                 $tab = "cur";
  41                                 $id = $s->cur_id;
  42                         }
  43                 }
  44
  45                 if ( $id == "" ) {
  46                         $sql = "SELECT old_id FROM old WHERE old_namespace=0 AND old_title='" . wfStrencode( $article_title ) .
  47                                 "' AND old_timestamp='" . wfStrencode( $article_time ) . "'";
  48                         $res = wfQuery( $sql, DB_READ );
  49                         if( $s = wfFetchObject( $res ) ) {
  50                                 $tab = "old";
  51                                 $id = $s->old_id;
  52                         }
  53                 }
  54         }
  55
  56         function get_prev_data( $user_id , $article_title , $article_timestamp = "" ) {
  57                 $ret = array ();
  58                 $sql = "SELECT * FROM validate WHERE val_user='" . wfStrencode( $user_id ) .
  59                         "' AND val_title='" . wfStrencode( $article_title ) . "'";
  60                 if ( $article_timestamp != "" ) {
  61                         $sql .= " AND val_timestamp='" . wfStrencode( $article_timestamp ) . "'";
  62                 }
  63                 $res = wfQuery( $sql, DB_READ );
  64                 while( $s = wfFetchObject( $res ) ) {
  65                         $ret[$s->val_timestamp][$s->val_type] = $s;
  66                 }
  67                 return $ret;
  68         }
  69
  70         function validate_form( $article_title = "" ) {
  71                 global $wgOut, $wgLang, $wgUser, $wgArticle, $wgRequest;
  72
  73                 if ( $wgUser->getID() == 0 ) {
  74                         # Anon
  75                         $wgOut->addHTML( htmlspecialchars( wfMsg( 'val_no_anon_validation' ) ) .
  76                                 $this->getPageStatistics ( $article_title ) ) ;
  77                         return;
  78                 }
  79
  80                 $validationtypes = $wgLang->getValidationTypes();
  81                 if ( $article_title == "" ) {
  82                         $article_title = $wgRequest->getVal( 'article_title' );
  83                         $heading = "<h1>" . htmlspecialchars( $article_title ) . "</h1>\n";
  84                 } else {
  85                         $heading = "";
  86                 }
  87                 $article_time = "";
  88                 $article_time = $wgRequest->getVal( 'timestamp' );
  89                 $article = Title::newFromText( $article_title );
  90                 if( is_null( $article ) ) {
  91                         $wgOut->errorpage( "badtitle", "badtitletext" );
  92                         return;
  93                 }
  94
  95                 # Now we get all the "votes" for the different versions of this article for this user
  96                 $val = $this->get_prev_data( $wgUser->getID() , $article_title );
  97
  98                 # No votes for this version, initial data
  99                 if( !isset( $val[$article_time] ) ) {
 100                         if( $article_time == "" ) {
 101                                 $res = wfQuery( "select cur_timestamp FROM cur WHERE cur_title='" .
 102                                         wfStrencode( $article_title ) . "' AND cur_namespace=0", DB_READ );
 103                                 if( $s = wfFetchObject( $res ) ) {
 104                                         $article_time = $s->cur_timestamp;
 105                                 }
 106                         }
 107                         $val[$article_time] = array();
 108                 }
 109
 110                 # Newest versions first
 111                 krsort( $val );
 112
 113                 # User has clicked "Doit" before, so evaluate form
 114                 if( $wgRequest->wasPosted() ) {
 115                         $oldtime = StrVal( $wgRequest->getVal( 'oldtime' ) );
 116                         if( !isset ( $val[$oldtime] ) ) {
 117                                 $val[$oldtime] = array();
 118                         }
 119
 120                         # Reading postdata
 121                         $postrad = array();
 122                         $poscomment = array();
 123                         for( $idx = 0 ; $idx < count( $validationtypes) ; $idx++ ) {
 124                                 $postrad[$idx] = $wgRequest->getVal( "rad{$idx}" );
 125                                 $postcomment[$idx] = $wgRequest->getText( "comment{$idx}" );
 126                         }
 127
 128                         # Merge others into this one
 129                         if( $wgRequest->getCheck( 'merge_other' ) ) {
 130                                 foreach( $val as $time => $stuff ) {
 131                                         if( $time != $article_time ) {
 132                                                 for( $idx = 0; $idx < count( $validationtypes ); $idx++ ) {
 133                                                         $rad = $postrad[$idx];
 134                                                         if( isset ( $stuff[$idx] ) && $stuff[$idx]->val_value != -1 && $rad == -1 ) {
 135                                                                 $postrad[$idx] = $stuff[$idx]->val_value;
 136                                                                 $postcomment[$idx] = $stuff[$idx]->val_comment;
 137                                                         }
 138                                                 }
 139                                         }
 140                                 }
 141                         }
 142
 143                         # Clear all others
 144                         if( $wgRequest->getCheck( 'clear_other' ) ) {
 145                                 $sql = "DELETE FROM validate WHERE val_title='" . wfStrencode( $article_title ) .
 146                                         "' AND val_timestamp<>'" . wfStrencode( $oldtime ) . "' AND val_user='";
 147                                 $sql .= wfStrencode( $wgUser->getID() ) . "'";
 148                                 wfQuery( $sql, DB_WRITE );
 149                                 $val2 = $val[$oldtime]; # Only version left
 150                                 $val = array(); # So clear others
 151                                 $val[$oldtime] = $val2;
 152                         }
 153
 154                         # Delete old "votes" for this version
 155                         $sql = "DELETE FROM validate WHERE val_title='" . wfStrencode( $article_title ) .
 156                                 "' AND val_timestamp='" . wfStrencode( $oldtime ) . "' AND val_user='";
 157                         $sql .= wfStrencode( $wgUser->getID() ) . "'";
 158                         wfQuery( $sql, DB_WRITE );
 159
 160                         # Incorporate changes
 161                         for( $idx = 0; $idx < count( $validationtypes ); $idx++ ) {
 162                                 $comment = $postcomment[$idx] ;
 163                                 $rad = $postrad[$idx] ;
 164                                 if ( !isset( $val[$oldtime][$idx] ) ) {
 165                                         $val[$oldtime][$idx] = "";
 166                                 }
 167                                 $val[$oldtime][$idx]->val_value = $rad;
 168                                 $val[$oldtime][$idx]->val_comment = $comment;
 169                                 if( $rad != -1 ) {
 170                                         # Store it in the database
 171                                         $sql = "INSERT INTO validate (val_user,val_title,val_timestamp,val_type,val_value,val_comment) " .
 172                                                  "VALUES ( '" . wfStrencode( $wgUser->getID() ) . "','" .
 173                                                  wfStrencode( $article_title ) . "','" .
 174                                                  wfStrencode( $oldtime ) . "','" .
 175                                                  wfStrencode( $idx ) . "','" .
 176                                                  wfStrencode( $rad ) . "','" .
 177                                                  wfStrencode( $comment ) . "')";
 178                                         wfQuery( $sql, DB_WRITE );
 179                                 }
 180                         }
 181                         $wgArticle->showArticle( "Juhuu", wfMsg( 'val_validated' ) );
 182                         return; # Show article instead of validation page
 183                 }
 184
 185                 # Generating HTML
 186                 $html = "";
 187
 188                 $skin = $wgUser->getSkin();
 189                 $staturl = $skin->makeSpecialURL( "validate" , "mode=stat_page&article_title=" . urlencode( $article_title ) );
 190                 $listurl = $skin->makeSpecialURL( "validate" , "mode=list_page" );
 191                 $html .= "<a href=\"" . htmlspecialchars( $staturl ) . "\">" . wfMsg('val_stat_link_text') . "</a> \n";
 192                 $html .= "<a href=\"" . htmlspecialchars( $listurl ) . "\">" . wfMsg('val_article_lists') . "</a><br />\n";
 193                 $html .= "<small>" . wfMsg('val_form_note') . "</small><br />\n";
 194
 195                 # Generating data tables
 196                 $tabsep = "<td width='0' style='border-left:2px solid black;'></td>";
 197                 $topstyle = "style='border-top:2px solid black'";
 198                 foreach( $val as $time => $stuff ) {
 199                         $tablestyle = "cellspacing='0' cellpadding='2'";
 200                         if ( $article_time == $time ) {
 201                                 $tablestyle .=" style='border: 2px solid red'";
 202                         }
 203                         $html .= "<h2>" . wfMsg( 'val_version_of', gmdate( "F d, Y H:i:s", wfTimestamp2Unix( $time ) ) );
 204                         $this->find_this_version ( $article_title , $time , $table_id , $table_name );
 205                         if( $table_name == "cur" ) {
 206                                 $html .= " (" . wfMsg( 'val_this_is_current_version' ) . ")";
 207                         }
 208                         $html .= "</h2>\n" ;
 209                         $html .= "<form method='post'>\n" ;
 210                         $html .= "<input type='hidden' name='oldtime' value=\"" . htmlspecialchars( $time ) . "\" />" ;
 211                         $html .= "<table {$tablestyle}>\n" ;
 212                         $html .= wfMsg( 'val_table_header', $tabsep );
 213                         for( $idx = 0; $idx < count( $validationtypes ); $idx++ ) {
 214                                 $x = explode( "|" , $validationtypes[$idx] , 4 );
 215                                 if( isset ( $stuff[$idx] ) ) {
 216                                         $choice = $stuff[$idx]->val_value;
 217                                 } else {
 218                                         $choice = -1;
 219                                 }
 220                                 if( isset( $stuff[$idx] ) ) {
 221                                         $comment = $stuff[$idx]->val_comment;
 222                                 } else {
 223                                         $comment = "";
 224                                 }
 225                                 $html .= "<tr><th align='left'>{$x[0]}</th>{$tabsep}<td align='right'>{$x[1]}</td>"
 226                                       .  "<td align='center'><span style='white-space: nowrap;'>" ;
 227                                 for( $cnt = 0 ; $cnt < $x[3] ; $cnt++) {
 228                                         $html .= "<input type='radio' name='rad{$idx}' value='{$cnt}'";
 229                                         if ( $choice == $cnt ) $html .= " checked='checked'";
 230                                         $html .= " /> ";
 231                                 }
 232                                 $html .= "</span></td><td>{$x[2]}</td>";
 233                                 $html .= "<td><input type='radio' name='rad{$idx}' value='-1'";
 234                                 if( $choice == -1 ) {
 235                                         $html .= " checked='checked'";
 236                                 }
 237                                 $html .= " /> " . wfMsg ( "val_noop" ) . "</td>{$tabsep}";
 238                                 $html .= "<td><input type='text' name='comment{$idx}' value=\"" . htmlspecialchars( $comment ) . "\" /></td>";
 239                                 $html .= "</tr>\n";
 240                         }
 241                         $html .= "<tr><td {$topstyle} colspan='2'>";
 242
 243                         # link to version
 244                         $title = Title::newFromDBkey( $article_title );
 245                         if ( $table_name == "cur" ) {
 246                                 $link_version = $title->getLocalURL( "" );
 247                         } else {
 248                                 $link_version = $title->getLocalURL( "oldid={$table_id}" );
 249                         }
 250                         $link_version = "<a href=\"" . htmlspecialchars( $link_version ) . "\">" . wfMsg ( 'val_view_version' ) . "</a>";
 251                         $html .= $link_version;
 252                         $html .= "</td><td {$topstyle} colspan='5'>";
 253                         $html .= "<input type='checkbox' name='merge_other' value='1' checked='checked' />";
 254                         $html .= wfMsg( 'val_merge_old' );
 255                         $html .= "<br /><input type='checkbox' name='clear_other' value='1' checked='checked' />";
 256                         $html .= wfMsg( 'val_clear_old', $skin->makeKnownLinkObj( $article ) );
 257                         $html .= "</td><td {$topstyle} align='right' valign='center'><input type='submit' name='doit' value=\"" . htmlspecialchars( wfMsg("ok") ) . "\" /></td>";
 258                         $html .= "</tr></table></form>\n";
 259                 }
 260
 261                 $html .= "<h2>" . wfMsg( 'preview' ) . "</h2>";
 262                 $wgOut->addHTML( $html );
 263                 $wgOut->addWikiText( $wgArticle->getContent( true ) );
 264         }
 265
 266         function getData( $user = -1 , $title = "" , $type = -1 ) {
 267                 $ret = array();
 268                 $sql = array();
 269                 if( $user != -1 ) {
 270                         $sql[] = "val_user='" . wfStrencode( $user ) . "'";
 271                 }
 272                 if( $type != -1 ) {
 273                         $sql[] = "val_type='" . wfStrencode( $type ) . "'";
 274                 }
 275                 if( $title != "" ) {
 276                         $sql[] = "val_title='" . wfStrencode( $title ) . "'";
 277                 }
 278                 $sql = implode( " AND " , $sql );
 279                 if( $sql != "" ) {
 280                         $sql = " WHERE " . $sql;
 281                 }
 282                 $sql = "SELECT * FROM validate" . $sql;
 283                 $res = wfQuery( $sql, DB_READ );
 284                 while( $s = wfFetchObject( $res ) ) {
 285                         $ret["{$s->val_title}"]["{$s->val_timestamp}"]["{$s->val_type}"][] = $s;
 286                 }
 287                 return $ret;
 288         }
 289
 290         # Show statistics for the different versions of a single article
 291         function getPageStatistics( $article_title = "" ) {
 292                 global $wgLang, $wgUser, $wgOut, $wgRequest;
 293                 $validationtypes = $wgLang->getValidationTypes();
 294                 if( $article_title == "" ) {
 295                         $article_title = $wgRequest->getVal( 'article_title' );
 296                 }
 297                 $d = $this->getData( -1 , $article_title , -1 );
 298                 if( count ( $d ) ) {
 299                         $d = array_shift ( $d ) ;
 300                 } else {
 301                         $d = array();
 302                 }
 303                 krsort( $d );
 304
 305                 # Getting table data (cur_id, old_id etc.) for each version
 306                 $table_id = array();
 307                 $table_name = array();
 308                 foreach( $d as $version => $data ) {
 309                         $this->find_this_version( $article_title, $version, $table_id[$version], $table_name[$version] );
 310                 }
 311
 312                 # Generating HTML
 313                 $title = Title::newFromDBkey( $article_title );
 314                 $wgOut->setPageTitle( wfMsg( 'val_page_validation_statistics' , $title->getPrefixedText() ) );
 315                 $html = "";
 316                 $skin = $wgUser->getSkin();
 317                 $listurl = $skin->makeSpecialURL( "validate" , "mode=list_page" );
 318                 $html .= "<a href=\"" . htmlspecialchars( $listurl ) . "\">" . wfMsg( 'val_article_lists' ) . "</a><br /><br />\n";
 319
 320                 $html .= "<table border='1' cellpadding='2' style='font-size:8pt;'>\n";
 321                 $html .= "<tr><th>" . wfMsg('val_version') . "</th>";
 322                 foreach( $validationtypes as $idx => $title ) {
 323                         $title = explode ( "|" , $title );
 324                         $html .= "<th>{$title[0]}</th>";
 325                 }
 326                 $html .= "<th>" . wfMsg('val_total') . "</th>";
 327                 $html .= "</tr>\n";
 328                 foreach( $d as $version => $data ) {
 329                         # Preamble for this version
 330                         $title = Title::newFromDBkey( $article_title );
 331                         $version_date = $wgLang->timeanddate( $version );
 332                         $version_validate_link = $title->escapeLocalURL( "action=validate&timestamp={$version}" );
 333                         $version_validate_link = "<a href=\"{$version_validate_link}\">" . wfMsg('val_validate_version') . "</a>";
 334                         if( $table_name[$version] == 'cur' ) {
 335                                 $version_view_link = $title->escapeLocalURL( "" );
 336                         } else {
 337                                 $version_view_link = $title->escapeLocalURL( "oldid={$table_id[$version]}" );
 338                         }
 339                         $version_view_link = "<a href=\"{$version_view_link}\">" . wfMsg('val_view_version') . "</a>";
 340                         $html .= "<tr>";
 341                         $html .= "<td align='center' valign='top' nowrap='nowrap'><b>{$version_date}</b><br />{$version_view_link}<br />{$version_validate_link}</td>";
 342
 343                         # Individual data
 344                         $vmax = array();
 345                         $vcur = array();
 346                         $users = array();
 347                         foreach( $data as $type => $x2 ) {
 348                                 if ( !isset ( $vcur[$type] ) ) $vcur[$type] = 0 ;
 349                                 if ( !isset ( $vmax[$type] ) ) $vmax[$type] = 0 ;
 350                                 if ( !isset ( $users[$type] ) ) $users[$type] = 0 ;
 351                                 foreach( $x2 as $user => $x ) {
 352                                         $vcur[$type] += $x->val_value;
 353                                         $temp = explode( "|" , $validationtypes[$type] );
 354                                         $vmax[$type] += $temp[3] - 1;
 355                                         $users[$type] += 1;
 356                                 }
 357                         }
 358
 359                         $total_count = 0;
 360                         $total_percent = 0;
 361                         foreach( $validationtypes as $idx => $title ) {
 362                                 if( isset ( $vcur[$idx] ) ) {
 363                                         $average = 100 * $vcur[$idx] / $vmax[$idx] ;
 364                                         $total_count += 1;
 365                                         $total_percent += $average;
 366                                         if( $users[$idx] > 1 ) {
 367                                                 $msgid = "val_percent";
 368                                         } else {
 369                                                 $msgid = "val_percent_single";
 370                                         }
 371                                         $html .= "<td align='center' valign='top'>" .
 372                                                         wfMsg( $msgid, number_format( $average, 2 ) ,
 373                                                                         $vcur[$idx] , $vmax[$idx] , $users[$idx] );
 374                                 } else {
 375                                         $html .= "<td align='center' valign='center'>";
 376                                         $html .= "(" . wfMsg ( "val_noop" ) . ")";
 377                                 }
 378                                 $html .= "</td>";
 379                         }
 380
 381                         if( $total_count > 0 ) {
 382                                 $total = $total_percent / $total_count;
 383                                 $total = number_format( $total , 2 ) . " %";
 384                         } else {
 385                                 $total = "";
 386                         }
 387                         $html .= "<td align='center' valign='top' nowrap='nowrap'><b>{$total}</b></td>";
 388
 389                         $html .= "</tr>";
 390                 }
 391                 $html .= "</table>\n";
 392                 return $html ;
 393         }
 394
 395         function countUserValidations( $userid ) {
 396                 $sql = "SELECT count(DISTINCT val_title) AS num FROM validate WHERE val_user=" . IntVal( $userid );
 397                 $res = wfQuery( $sql, DB_READ );
 398                 if ( $s = wfFetchObject( $res ) ) {
 399                         $num = $s->num;
 400                 } else {
 401                         $num = 0;
 402                 }
 403                 return $num;
 404         }
 405
 406         function getArticleList() {
 407                 global $wgLang, $wgOut;
 408                 $validationtypes = $wgLang->getValidationTypes();
 409                 $wgOut->setPageTitle( wfMsg( 'val_article_lists' ) );
 410                 $html = "";
 411
 412                 # Choices
 413                 $choice = array ();
 414                 $maxw = 0;
 415                 foreach( $validationtypes as $idx => $data ) {
 416                         $x = explode( "|" , $data , 4 );
 417                         if( $x[3] > $maxw ) {
 418                                 $maxw = $x[3];
 419                         }
 420                 }
 421                 foreach( $validationtypes as $idx => $data ) {
 422                         $choice[$idx] = array();
 423                         for( $a = 0 ; $a < $maxw ; $a++ ) {
 424                                 $var = "cb_{$idx}_{$a}";
 425                                 if( isset ( $_POST[$var] ) ) $choice[$idx][$a] = $_POST[$var] ; # Selected
 426                                 else if ( !isset ( $_POST["doit"] ) ) $choice[$idx][$a] = 1 ; # First time
 427                                 else $choice[$idx][$a] = 0 ; # De-selected
 428                         }
 429                 }
 430
 431                 # The form
 432                 $html .= "<form method='post'>\n";
 433                 $html .= "<table border='1' cellspacing='0' cellpadding='2'>" ;
 434                 foreach( $validationtypes as $idx => $data ) {
 435                         $x = explode ( "|" , $data , 4 );
 436
 437                         $html .= "<tr>";
 438                         $html .= "<th nowrap='nowrap'>{$x[0]}</th>";
 439                         $html .= "<td align='right' nowrap='nowrap'>{$x[1]}</td>";
 440
 441                         for( $a = 0; $a < $maxw; $a++ ) {
 442                                 if( $a < $x[3] ) {
 443                                         $td = "<input type='checkbox' name='cb_{$idx}_{$a}' value='1'";
 444                                         if( $choice[$idx][$a] == 1 ) {
 445                                                 $td .= " checked='checked'" ;
 446                                         }
 447                                         $td .= " />";
 448                                 } else {
 449                                         $td = '';
 450                                 }
 451                                 $html .= "<td>{$td}</td>";
 452                         }
 453
 454                         $html .= "<td nowrap='nowrap'>{$x[2]}</td>";
 455                         $html .= "</tr>\n";
 456                 }
 457                 $html .= "<tr><td colspan='" . ( $maxw + 2 ) . "'></td>\n";
 458                 $html .= "<td align='right' valign='center'><input type='submit' name='doit' value=\"" . htmlspecialchars( wfMsg ( 'ok' ) ) . "\" /></td></tr>";
 459                 $html .= "</table>\n";
 460                 $html .= "</form>\n";
 461
 462                 # The query
 463                 $articles = array();
 464                 $sql = "SELECT DISTINCT val_title,val_timestamp,val_type,avg(val_value) AS avg FROM validate GROUP BY val_title,val_timestamp,val_type";
 465                 $res = wfQuery( $sql, DB_READ );
 466                 while( $s = wfFetchObject( $res ) ) {
 467                         $articles[$s->val_title][$s->val_timestamp][$s->val_type] = $s;
 468                 }
 469
 470                 # The list
 471                 $html .= "<ul>\n";
 472                 foreach( $articles as $dbkey => $timedata ) {
 473                         $title = Title::newFromDBkey( $dbkey );
 474                         $out = array();
 475                         krsort( $timedata );
 476
 477                         foreach( $timedata as $timestamp => $typedata ) {
 478                                 $showit = true;
 479                                 foreach( $typedata as $type => $data ) {
 480                                         $avg = intval ( $data->avg + 0.5 );
 481                                         if ( $choice[$type][$avg] == 0 ) $showit = false;
 482                                 }
 483                                 if( $showit ) {
 484                                         $out[] = "<li>" . $this->getVersionLink ( $title , $timestamp ) . "</li>\n";
 485                                 }
 486                         }
 487
 488                         if( count( $out ) > 0 ) {
 489                                 $html .= "<li>\n";
 490                                 $html .= htmlspecialchars( $title->getText() ) . "\n";
 491                                 $html .= "<ul>\n";
 492                                 $html .= implode( "\n" , $out );
 493                                 $html .= "</ul>\n</li>\n";
 494                         }
 495                 }
 496                 $html .= "</ul>\n";
 497                 return $html;
 498         }
 499
 500         function getVersionLink( &$title , $timestamp ) {
 501                 global $wgLang;
 502                 $dbkey = $title->getDBkey();
 503                 $this->find_this_version( $dbkey, $timestamp, $table_id, $table_name );
 504                 if( $table_name == 'cur' ) {
 505                         $link = $title->getLocalURL( "" );
 506                 } else {
 507                         $link = $title->getLocalURL( "action=validate&timestamp={$table_id}" );
 508                 }
 509                 $linktitle = wfMsg( 'val_version_of', $wgLang->timeanddate( $timestamp ) );
 510                 $link = "<a href=\"" . htmlspecialchars( $link ) . "\">" . $linktitle . "</a>";
 511                 if( $table_name == 'cur' ) {
 512                         $link .= " (" . wfMsg ( 'val_this_is_current_version' ) . ")";
 513                 }
 514
 515                 $vlink = wfMsg( 'val_tab' );
 516                 $vlink = "[<a href=\"" . $title->escapeLocalURL( "action=validate&timestamp={$timestamp}" ) . "\">{$vlink}</a>] " . $link;
 517                 return $vlink ;
 518         }
 519
 520 }
 521
 522 /**
 523  * constructor
 524  */
 525 function wfSpecialValidate( $page = '' ) {
 526         global $wgOut, $wgRequest, $wgUseValidation;
 527
 528         if( !$wgUseValidation ) {
 529                 $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
 530                 return;
 531         }
 532
 533         $mode = $wgRequest->getVal( 'mode', 'form' );
 534         $v = new Validation;
 535         $html = "" ;
 536 /*      if( $mode == "form" ) {
 537                 $html = $v->validate_form () ;
 538         } else */
 539         if( $mode == "stat_page" ) {
 540                 $html = $v->getPageStatistics();
 541         } else if( $mode == "list_page" ) {
 542                 $html = $v->getArticleList();
 543         }
 544
 545         $wgOut->addHTML( $html );
 546 }
 547
 548 ?>