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 include_once ( "SpecialValidate.php" );
  10
  11 /**
  12  * @todo document
  13  * @package MediaWiki
  14  */
  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 = $wgRequest->getText('offset');
  56                 if (!strlen($offset) || !preg_match("/^[0-9]+$/", $offset)) $offset = 0;
  57
  58                 if (($gowhere = $wgRequest->getText("go")) !== NULL) {
  59                         switch ($gowhere) {
  60                         case "first":
  61                                 if (($lastid = $this->getLastOffset($id, $limit)) === NULL)
  62                                         break;
  63                                 $gourl = $wgTitle->getLocalURL("action=history&limit={$limit}&offset={$lastid}");
  64                                 break;
  65                         default:
  66                                 $gourl = NULL;
  67                         }
  68
  69                         if (!is_null($gourl)) {
  70                                 $wgOut->redirect($gourl);
  71                                 return;
  72                         }
  73                 }
  74
  75                 $firsturl = $wgTitle->escapeLocalURL("action=history&limit={$limit}&go=first");
  76                 $lasturl = $wgTitle->escapeLocalURL("action=history&limit={$limit}");
  77                 $firsttext = wfMsg("histfirst");
  78                 $lasttext = wfMsg("histlast");
  79
  80                 /* Check one extra row to see whether we need to show 'next' and diff links */
  81                 $limitplus = $limit + 1;
  82
  83                 $namespace = $this->mTitle->getNamespace();
  84                 $title = $this->mTitle->getText();
  85                 $uid = $wgUser->getID();
  86                 $db =& wfGetDB( DB_SLAVE );
  87                 if ($uid && $wgShowUpdatedMarker )
  88                         $notificationtimestamp = $db->selectField( 'watchlist',
  89                                 'wl_notificationtimestamp',
  90                                 array( 'wl_namespace' => $namespace, 'wl_title' => $this->mTitle->getDBkey(), 'wl_user' => $uid ),
  91                                 $fname );
  92                 else $notificationtimestamp = false;
  93
  94                 $use_index = $db->useIndexClause( 'page_timestamp' );
  95                 $revision = $db->tableName( 'revision' );
  96
  97                 $limits = $offsets = "";
  98                 $dir = 0;
  99                 if ($wgRequest->getText("dir") == "prev")
 100                         $dir = 1;
 101
 102                 list($dirs, $oper) = array("DESC", "<");
 103                 if ($dir) {
 104                         list($dirs, $oper) = array("ASC", ">");
 105                 }
 106
 107                 if ($offset)
 108                         $offsets .= " AND rev_timestamp $oper '$offset' ";
 109                 if ($limit)
 110                         $limits .= " LIMIT $limitplus ";
 111
 112                 $sql = "SELECT rev_id,rev_user," .
 113                   "rev_comment,rev_user_text,rev_timestamp,rev_minor_edit,rev_deleted ".
 114                   "FROM $revision $use_index " .
 115                   "WHERE rev_page=$id " .
 116                   $offsets .
 117                   "ORDER BY rev_timestamp $dirs " .
 118                   $limits;
 119                 $res = $db->query( $sql, $fname );
 120
 121                 $revs = $db->numRows( $res );
 122
 123                 if( $revs < $limitplus ) // the sql above tries to fetch one extra
 124                         $this->linesonpage = $revs;
 125                 else
 126                         $this->linesonpage = $revs - 1;
 127
 128                 $atend = ($revs < $limitplus);
 129
 130                 $this->mSkin = $wgUser->getSkin();
 131
 132                 $pages = array();
 133                 $lowts = 0;
 134                 while ($line = $db->fetchObject($res)) {
 135                         $pages[] = $line;
 136                 }
 137                 if ($dir) $pages = array_reverse($pages);
 138                 if (count($pages) > 1)
 139                         $lowts = $pages[count($pages) - 2]->rev_timestamp;
 140                 else
 141                         $lowts = $pages[count($pages) - 1]->rev_timestamp;
 142
 143
 144                 $prevurl = $wgTitle->escapeLocalURL("action=history&dir=prev&offset={$offset}&limit={$limit}");
 145                 $nexturl = $wgTitle->escapeLocalURL("action=history&offset={$lowts}&limit={$limit}");
 146                 $urls = array();
 147                 foreach (array(20, 50, 100, 250, 500) as $num) {
 148                         $urls[] = "<a href=\"".$wgTitle->escapeLocalURL(
 149                                 "action=history&offset={$offset}&limit={$num}")."\">".$wgLang->formatNum($num)."</a>";
 150                 }
 151                 $bits = implode($urls, ' | ');
 152                 if ($offset) {
 153                         $prevtext = "<a href=\"$prevurl\">".wfMsg("prevn", $limit)."</a>";
 154                         $lasttext = "<a href=\"$lasturl\">$lasttext</a>";
 155                 } else  $prevtext = wfMsg("prevn", $limit);
 156
 157                 if ($revs >= $limitplus) {
 158                         $nexttext = "<a href=\"$nexturl\">".wfMsg("nextn", $limit)."</a>";
 159                         $firsttext = "<a href=\"$firsturl\">$firsttext</a>";
 160                 } else  $nexttext = wfMsg("nextn", $limit);
 161
 162                 $firstlast = "($firsttext | $lasttext)";
 163
 164                 $numbar = "$firstlast " . wfMsg("viewprevnext", $prevtext, $nexttext, $bits);
 165
 166                 $s = $numbar;
 167                 $s .= $this->beginHistoryList();
 168                 $counter = 1;
 169                 foreach($pages as $i => $line) {
 170                         $first = ($counter == 1 && $offset == 0);
 171                         $next = isset( $pages[$i + 1] ) ? $pages[$i + 1 ] : null;
 172                         $s .= $this->historyLine( $line, $next, $counter, $notificationtimestamp, $first );
 173                         $counter++;
 174                 }
 175                 $s .= $this->endHistoryList( !$atend );
 176                 $s .= $numbar;
 177
 178                 # Validation line
 179                 if ( isset ( $wgUseValidation ) && $wgUseValidation ) {
 180                         $s .= "<p>" . Validation::link2statistics ( $this->mArticle ) . "</p>" ;
 181                         }
 182
 183                 $wgOut->addHTML( $s );
 184                 wfProfileOut( $fname );
 185         }
 186
 187         function beginHistoryList() {
 188                 global $wgTitle;
 189                 $this->lastdate = '';
 190                 $s = '<p>' . wfMsg( 'histlegend' ) . '</p>';
 191                 $s .= '<form action="' . $wgTitle->escapeLocalURL( '-' ) . '" method="get">';
 192                 $prefixedkey = htmlspecialchars($wgTitle->getPrefixedDbKey());
 193                 $s .= "<input type='hidden' name='title' value=\"{$prefixedkey}\" />\n";
 194                 $s .= $this->submitButton();
 195                 $s .= '<ul id="pagehistory">';
 196                 return $s;
 197         }
 198
 199         function endHistoryList() {
 200                 $last = wfMsg( 'last' );
 201
 202                 $s = '</ul>';
 203                 $s .= $this->submitButton( array( 'id' => 'historysubmit' ) );
 204                 $s .= '</form>';
 205                 return $s;
 206         }
 207
 208         function submitButton( $bits = array() ) {
 209                 return ( $this->linesonpage > 0 )
 210                         ? wfElement( 'input', array_merge( $bits,
 211                                 array(
 212                                         'class'     => 'historysubmit',
 213                                         'type'      => 'submit',
 214                                         'accesskey' => wfMsg( 'accesskey-compareselectedversions' ),
 215                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 216                                         'value'     => wfMsg( 'compareselectedversions' ),
 217                                 ) ) )
 218                         : '';
 219         }
 220
 221         function historyLine( $row, $next, $counter = '', $notificationtimestamp = false, $latest = false ) {
 222                 global $wgLang, $wgContLang;
 223
 224                 static $message;
 225                 if( !isset( $message ) ) {
 226                         foreach( explode( ' ', 'cur last selectolderversionfordiff selectnewerversionfordiff minoreditletter' ) as $msg ) {
 227                                 $message[$msg] = wfMsg( $msg );
 228                         }
 229                 }
 230
 231                 $link = $this->revLink( $row );
 232
 233                 if ( 0 == $row->rev_user ) {
 234                         $contribsPage =& Title::makeTitle( NS_SPECIAL, 'Contributions' );
 235                         $ul = $this->mSkin->makeKnownLinkObj( $contribsPage,
 236                                 htmlspecialchars( $row->rev_user_text ),
 237                                 'target=' . urlencode( $row->rev_user_text ) );
 238                 } else {
 239                         $userPage =& Title::makeTitle( NS_USER, $row->rev_user_text );
 240                         $ul = $this->mSkin->makeLinkObj( $userPage , htmlspecialchars( $row->rev_user_text ) );
 241                 }
 242
 243                 $s = '<li>';
 244                 if( $row->rev_deleted ) {
 245                         $s .= '<span class="deleted">';
 246                 }
 247                 $curlink = $this->curLink( $row, $latest );
 248                 $lastlink = $this->lastLink( $row, $next, $counter );
 249                 $arbitrary = $this->diffButtons( $row, $latest, $counter );
 250                 $s .= "({$curlink}) ({$lastlink}) $arbitrary {$link} <span class='user'>{$ul}</span>";
 251
 252                 if( $row->rev_minor_edit ) {
 253                         $s .= ' ' . wfElement( 'span', array( 'class' => 'minor' ), $message['minoreditletter'] );
 254                 }
 255
 256
 257                 $s .= $this->mSkin->commentBlock( $row->rev_comment, $this->mTitle );
 258                 if ($notificationtimestamp && ($row->rev_timestamp >= $notificationtimestamp)) {
 259                         $s .= wfMsg( 'updatedmarker' );
 260                 }
 261                 if( $row->rev_deleted ) {
 262                         $s .= "</span> " . htmlspecialchars( wfMsg( 'deletedrev' ) );
 263                 }
 264                 $s .= '</li>';
 265
 266                 return $s;
 267         }
 268
 269         function revLink( $row ) {
 270                 global $wgUser, $wgLang;
 271                 $date = $wgLang->timeanddate( $row->rev_timestamp, true );
 272                 if( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) {
 273                         return $date;
 274                 } else {
 275                         return $this->mSkin->makeKnownLinkObj(
 276                                 $this->mTitle,
 277                                 $date,
 278                                 'oldid='.$row->rev_id );
 279                 }
 280         }
 281
 282         function curLink( $row, $latest ) {
 283                 global $wgUser;
 284                 $cur = htmlspecialchars( wfMsg( 'cur' ) );
 285                 if( $latest
 286                         || ( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) ) {
 287                         return $cur;
 288                 } else {
 289                         return $this->mSkin->makeKnownLinkObj(
 290                                 $this->mTitle,
 291                                 $cur,
 292                                 'diff=0&oldid=' . $row->rev_id );
 293                 }
 294         }
 295
 296         function lastLink( $row, $next, $counter ) {
 297                 global $wgUser;
 298                 $last = htmlspecialchars( wfMsg( 'last' ) );
 299                 if( is_null( $next )
 300                         || ( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) ) {
 301                         return $last;
 302                 } else {
 303                         return $this->mSkin->makeKnownLinkObj(
 304                           $this->mTitle,
 305                           $last,
 306                           "diff={$row->rev_id}&oldid={$next->rev_id}",
 307                           '',
 308                           '',
 309                           ' tabindex="'.$counter.'"' );
 310                 }
 311         }
 312
 313         function diffButtons( $row, $latest, $counter ) {
 314                 global $wgUser;
 315                 if( $this->linesonpage > 1) {
 316                         $radio = array(
 317                                 'type'  => 'radio',
 318                                 'value' => $row->rev_id,
 319                                 'title' => wfMsg( 'selectolderversionfordiff' )
 320                         );
 321                         if( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) {
 322                                 $radio['disabled'] = 'disabled';
 323                         }
 324
 325                         # XXX: move title texts to javascript
 326                         if ( $latest ) {
 327                                 $first = wfElement( 'input', array_merge(
 328                                         $radio,
 329                                         array(
 330                                                 'style' => 'visibility:hidden',
 331                                                 'name'  => 'oldid' ) ) );
 332                                 $checkmark = array( 'checked' => 'checked' );
 333                         } else {
 334                                 if( $counter == 2 ) {
 335                                         $checkmark = array( 'checked' => 'checked' );
 336                                 } else {
 337                                         $checkmark = array();
 338                                 }
 339                                 $first = wfElement( 'input', array_merge(
 340                                         $radio,
 341                                         $checkmark,
 342                                         array( 'name'  => 'oldid' ) ) );
 343                                 $checkmark = array();
 344                         }
 345                         $second = wfElement( 'input', array_merge(
 346                                 $radio,
 347                                 $checkmark,
 348                                 array( 'name'  => 'diff' ) ) );
 349                         return $first . $second;
 350                 } else {
 351                         return '';
 352                 }
 353         }
 354
 355         function getLastOffset($id, $step = 50) {
 356                 $db =& wfGetDB(DB_SLAVE);
 357                 $sql = "SELECT rev_timestamp FROM revision WHERE rev_page = $id ORDER BY rev_timestamp ASC LIMIT $step";
 358                 $res = $db->query($sql, "getLastOffset");
 359                 $n = $db->numRows($res);
 360
 361                 if ($n == 0)
 362                         return NULL;
 363
 364                 while ($n--)
 365                         $obj = $db->fetchObject($res);
 366                 return $obj->rev_timestamp;
 367         }
 368 }
 369
 370 ?>