includes/PageHistory.php

   1 <?php
   2 /**
   3  * Page history
   4  *
   5  * Split off from Article.php and Skin.php, 2003-12-22
   6  * @package MediaWiki
   7  */
   8
   9 /**
  10  * @todo document
  11  * @package MediaWiki
  12  */
  13
  14 include_once ( "SpecialValidate.php" ) ;
  15
  16 class PageHistory {
  17         var $mArticle, $mTitle, $mSkin;
  18         var $lastdate;
  19         var $linesonpage;
  20         function PageHistory( $article ) {
  21                 $this->mArticle =& $article;
  22                 $this->mTitle =& $article->mTitle;
  23         }
  24
  25         # This shares a lot of issues (and code) with Recent Changes
  26
  27         function history() {
  28                 global $wgUser, $wgOut, $wgLang, $wgShowUpdatedMarker, $wgRequest,
  29                         $wgTitle, $wgUseValidation ;
  30
  31                 # If page hasn't changed, client can cache this
  32
  33                 if( $wgOut->checkLastModified( $this->mArticle->getTimestamp() ) ){
  34                         # Client cache fresh and headers sent, nothing more to do.
  35                         return;
  36                 }
  37                 $fname = 'PageHistory::history';
  38                 wfProfileIn( $fname );
  39
  40                 $wgOut->setPageTitle( $this->mTitle->getPRefixedText() );
  41                 $wgOut->setSubtitle( wfMsg( 'revhistory' ) );
  42                 $wgOut->setArticleFlag( false );
  43                 $wgOut->setArticleRelated( true );
  44                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
  45
  46                 $id = $this->mTitle->getArticleID();
  47                 if( $id == 0 ) {
  48                         $wgOut->addHTML( wfMsg( 'nohistory' ) );
  49                         wfProfileOut( $fname );
  50                         return;
  51                 }
  52
  53                 $limit = $wgRequest->getInt('limit');
  54                 if (!$limit) $limit = 50;
  55                 $offset = $wgRequest->getText('offset');
  56                 if (!isset($offset) || !preg_match("/^[0-9]+$/", $offset)) $offset = 0;
  57
  58                 /* Check one extra row to see whether we need to show 'next' and diff links */
  59                 $limitplus = $limit + 1;
  60
  61                 $namespace = $this->mTitle->getNamespace();
  62                 $title = $this->mTitle->getText();
  63                 $uid = $wgUser->getID();
  64                 $db =& wfGetDB( DB_SLAVE );
  65                 if ($uid && $wgShowUpdatedMarker && $wgUser->getOption( 'showupdated' ))
  66                         $notificationtimestamp = $db->selectField( 'watchlist',
  67                                 'wl_notificationtimestamp',
  68                                 array( 'wl_namespace' => $namespace, 'wl_title' => $this->mTitle->getDBkey(), 'wl_user' => $uid ),
  69                                 $fname );
  70                 else $notificationtimestamp = false;
  71
  72                 $use_index = $db->useIndexClause( 'page_timestamp' );
  73                 $revision = $db->tableName( 'revision' );
  74
  75                 $limits = $offsets = "";
  76                 $dir = 0;
  77                 if ($wgRequest->getText("dir") == "prev")
  78                         $dir = 1;
  79
  80                 list($dirs, $oper) = array("DESC", "<");
  81                 if ($dir) {
  82                         list($dirs, $oper) = array("ASC", ">");
  83                 }
  84
  85                 if ($offset)
  86                         $offsets .= " AND rev_timestamp $oper '$offset' ";
  87                 if ($limit)
  88                         $limits .= " LIMIT $limitplus ";
  89
  90                 $sql = "SELECT rev_id,rev_user," .
  91                   "rev_comment,rev_user_text,rev_timestamp,rev_minor_edit,rev_deleted ".
  92                   "FROM $revision $use_index " .
  93                   "WHERE rev_page=$id " .
  94                   $offsets .
  95                   "ORDER BY rev_timestamp $dirs " .
  96                   $limits;
  97                 $res = $db->query( $sql, $fname );
  98
  99                 $revs = $db->numRows( $res );
 100
 101                 if( $revs < $limitplus ) // the sql above tries to fetch one extra
 102                         $this->linesonpage = $revs;
 103                 else
 104                         $this->linesonpage = $revs - 1;
 105
 106                 $atend = ($revs < $limitplus);
 107
 108                 $this->mSkin = $wgUser->getSkin();
 109
 110                 $pages = array();
 111                 $lowts = 0;
 112                 while ($line = $db->fetchObject($res)) {
 113                         $pages[] = $line;
 114                 }
 115                 if ($dir) $pages = array_reverse($pages);
 116                 if (count($pages) > 1)
 117                         $lowts = $pages[count($pages) - 2]->rev_timestamp;
 118                 else
 119                         $lowts = $pages[count($pages) - 1]->rev_timestamp;
 120
 121
 122                 $prevurl = $wgTitle->escapeLocalURL("action=history&dir=prev&offset={$offset}&limit={$limit}");
 123                 $nexturl = $wgTitle->escapeLocalURL("action=history&offset={$lowts}&limit={$limit}");
 124                 $urls = array();
 125                 foreach (array(20, 50, 100, 250, 500) as $num) {
 126                         $urls[] = "<a href=\"".$wgTitle->escapeLocalURL(
 127                                 "action=history&offset={$offset}&limit={$num}")."\">".$wgLang->formatNum($num)."</a>";
 128                 }
 129                 $bits = implode($urls, ' | ');
 130                 $numbar = wfMsg("viewprevnext",
 131                                 "<a href=\"$prevurl\">".wfMsg("prevn", $limit)."</a>",
 132                                 "<a href=\"$nexturl\">".wfMsg("nextn", $limit)."</a>",
 133                                 $bits);
 134
 135                 $s = $numbar;
 136                 $s .= $this->beginHistoryList();
 137                 $counter = 1;
 138                 foreach($pages as $i => $line) {
 139                         $first = ($counter == 1 && $offset == 0);
 140                         $next = isset( $pages[$i + 1] ) ? $pages[$i + 1 ] : null;
 141                         $s .= $this->historyLine( $line, $next, $counter, $notificationtimestamp, $first );
 142                         $counter++;
 143                 }
 144                 $s .= $this->endHistoryList( !$atend );
 145                 $s .= $numbar;
 146
 147                 # Validation line
 148                 if ( isset ( $wgUseValidation ) && $wgUseValidation ) {
 149                         $s .= "<p>" . Validation::link2statistics ( $this->mArticle ) . "</p>" ;
 150                         }
 151
 152                 $wgOut->addHTML( $s );
 153                 wfProfileOut( $fname );
 154         }
 155
 156         function beginHistoryList() {
 157                 global $wgTitle;
 158                 $this->lastdate = '';
 159                 $s = '<p>' . wfMsg( 'histlegend' ) . '</p>';
 160                 $s .= '<form action="' . $wgTitle->escapeLocalURL( '-' ) . '" method="get">';
 161                 $prefixedkey = htmlspecialchars($wgTitle->getPrefixedDbKey());
 162                 $s .= "<input type='hidden' name='title' value=\"{$prefixedkey}\" />\n";
 163                 $s .= $this->submitButton();
 164                 $s .= '<ul id="pagehistory">';
 165                 return $s;
 166         }
 167
 168         function endHistoryList() {
 169                 $last = wfMsg( 'last' );
 170
 171                 $s = '</ul>';
 172                 $s .= $this->submitButton( array( 'id' => 'historysubmit' ) );
 173                 $s .= '</form>';
 174                 return $s;
 175         }
 176
 177         function submitButton( $bits = array() ) {
 178                 return ( $this->linesonpage > 0 )
 179                         ? wfElement( 'input', array_merge( $bits,
 180                                 array(
 181                                         'class'     => 'historysubmit',
 182                                         'type'      => 'submit',
 183                                         'accesskey' => wfMsg( 'accesskey-compareselectedversions' ),
 184                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 185                                         'value'     => wfMsg( 'compareselectedversions' ),
 186                                 ) ) )
 187                         : '';
 188         }
 189
 190         function historyLine( $row, $next, $counter = '', $notificationtimestamp = false, $latest = false ) {
 191                 global $wgLang, $wgContLang;
 192
 193                 static $message;
 194                 if( !isset( $message ) ) {
 195                         foreach( explode( ' ', 'cur last selectolderversionfordiff selectnewerversionfordiff minoreditletter' ) as $msg ) {
 196                                 $message[$msg] = wfMsg( $msg );
 197                         }
 198                 }
 199
 200                 $link = $this->revLink( $row );
 201
 202                 if ( 0 == $row->rev_user ) {
 203                         $contribsPage =& Title::makeTitle( NS_SPECIAL, 'Contributions' );
 204                         $ul = $this->mSkin->makeKnownLinkObj( $contribsPage,
 205                                 htmlspecialchars( $row->rev_user_text ),
 206                                 'target=' . urlencode( $row->rev_user_text ) );
 207                 } else {
 208                         $userPage =& Title::makeTitle( NS_USER, $row->rev_user_text );
 209                         $ul = $this->mSkin->makeLinkObj( $userPage , htmlspecialchars( $row->rev_user_text ) );
 210                 }
 211
 212                 $s = '<li>';
 213                 if( $row->rev_deleted ) {
 214                         $s .= '<span class="deleted">';
 215                 }
 216                 $curlink = $this->curLink( $row, $latest );
 217                 $lastlink = $this->lastLink( $row, $next, $counter );
 218                 $arbitrary = $this->diffButtons( $row, $latest, $counter );
 219                 $s .= "({$curlink}) ({$lastlink}) $arbitrary {$link} <span class='user'>{$ul}</span>";
 220
 221                 if( $row->rev_minor_edit ) {
 222                         $s .= ' ' . wfElement( 'span', array( 'class' => 'minor' ), $message['minoreditletter'] );
 223                 }
 224
 225
 226                 $s .= $this->mSkin->commentBlock( $row->rev_comment, $this->mTitle );
 227                 if ($notificationtimestamp && ($row->rev_timestamp >= $notificationtimestamp)) {
 228                         $s .= wfMsg( 'updatedmarker' );
 229                 }
 230                 if( $row->rev_deleted ) {
 231                         $s .= "</span> " . htmlspecialchars( wfMsg( 'deletedrev' ) );
 232                 }
 233                 $s .= '</li>';
 234
 235                 return $s;
 236         }
 237
 238         function revLink( $row ) {
 239                 global $wgUser, $wgLang;
 240                 $date = $wgLang->timeanddate( $row->rev_timestamp, true );
 241                 if( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) {
 242                         return $date;
 243                 } else {
 244                         return $this->mSkin->makeKnownLinkObj(
 245                                 $this->mTitle,
 246                                 $date,
 247                                 'oldid='.$row->rev_id );
 248                 }
 249         }
 250
 251         function curLink( $row, $latest ) {
 252                 global $wgUser;
 253                 $cur = htmlspecialchars( wfMsg( 'cur' ) );
 254                 if( $latest
 255                         || ( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) ) {
 256                         return $cur;
 257                 } else {
 258                         return $this->mSkin->makeKnownLinkObj(
 259                                 $this->mTitle,
 260                                 $cur,
 261                                 'diff=0&oldid=' . $row->rev_id );
 262                 }
 263         }
 264
 265         function lastLink( $row, $next, $counter ) {
 266                 global $wgUser;
 267                 $last = htmlspecialchars( wfMsg( 'last' ) );
 268                 if( is_null( $next )
 269                         || ( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) ) {
 270                         return $last;
 271                 } else {
 272                         return $this->mSkin->makeKnownLinkObj(
 273                           $this->mTitle,
 274                           $last,
 275                           "diff={$row->rev_id}&oldid={$next->rev_id}",
 276                           '',
 277                           '',
 278                           ' tabindex="'.$counter.'"' );
 279                 }
 280         }
 281
 282         function diffButtons( $row, $latest, $counter ) {
 283                 global $wgUser;
 284                 if( $this->linesonpage > 1) {
 285                         $radio = array(
 286                                 'type'  => 'radio',
 287                                 'value' => $row->rev_id,
 288                                 'title' => wfMsg( 'selectolderversionfordiff' )
 289                         );
 290                         if( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) {
 291                                 $radio['disabled'] = 'disabled';
 292                         }
 293
 294                         # XXX: move title texts to javascript
 295                         if ( $latest ) {
 296                                 $first = wfElement( 'input', array_merge(
 297                                         $radio,
 298                                         array(
 299                                                 'style' => 'visibility:hidden',
 300                                                 'name'  => 'oldid' ) ) );
 301                                 $checkmark = array( 'checked' => 'checked' );
 302                         } else {
 303                                 if( $counter == 2 ) {
 304                                         $checkmark = array( 'checked' => 'checked' );
 305                                 } else {
 306                                         $checkmark = array();
 307                                 }
 308                                 $first = wfElement( 'input', array_merge(
 309                                         $radio,
 310                                         $checkmark,
 311                                         array( 'name'  => 'oldid' ) ) );
 312                                 $checkmark = array();
 313                         }
 314                         $second = wfElement( 'input', array_merge(
 315                                 $radio,
 316                                 $checkmark,
 317                                 array( 'name'  => 'diff' ) ) );
 318                         return $first . $second;
 319                 } else {
 320                         return '';
 321                 }
 322         }
 323
 324 }
 325
 326 ?>