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 class PageHistory {
  14         var $mArticle, $mTitle, $mSkin;
  15         var $lastline, $lastdate;
  16         var $linesonpage;
  17         function PageHistory( $article ) {
  18                 $this->mArticle =& $article;
  19                 $this->mTitle =& $article->mTitle;
  20         }
  21
  22         # This shares a lot of issues (and code) with Recent Changes
  23
  24         function history() {
  25                 global $wgUser, $wgOut, $wgLang, $wgShowUpdatedMarker, $wgRequest,
  26                         $wgTitle;
  27
  28                 # If page hasn't changed, client can cache this
  29
  30                 if( $wgOut->checkLastModified( $this->mArticle->getTimestamp() ) ){
  31                         # Client cache fresh and headers sent, nothing more to do.
  32                         return;
  33                 }
  34                 $fname = 'PageHistory::history';
  35                 wfProfileIn( $fname );
  36
  37                 $wgOut->setPageTitle( $this->mTitle->getPRefixedText() );
  38                 $wgOut->setSubtitle( wfMsg( 'revhistory' ) );
  39                 $wgOut->setArticleFlag( false );
  40                 $wgOut->setArticleRelated( true );
  41                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
  42
  43                 $id = $this->mTitle->getArticleID();
  44                 if( $id == 0 ) {
  45                         $wgOut->addHTML( wfMsg( 'nohistory' ) );
  46                         wfProfileOut( $fname );
  47                         return;
  48                 }
  49
  50                 $limit = $wgRequest->getInt('limit');
  51                 if (!$limit) $limit = 50;
  52                 $offset = $wgRequest->getText('offset');
  53                 if (!isset($offset) || !preg_match("/^[0-9]+$/", $offset)) $offset = 0;
  54
  55                 /* Check one extra row to see whether we need to show 'next' and diff links */
  56                 $limitplus = $limit + 1;
  57
  58                 $namespace = $this->mTitle->getNamespace();
  59                 $title = $this->mTitle->getText();
  60                 $uid = $wgUser->getID();
  61                 $db =& wfGetDB( DB_SLAVE );
  62                 if ($uid && $wgShowUpdatedMarker && $wgUser->getOption( 'showupdated' ))
  63                         $notificationtimestamp = $db->selectField( 'watchlist',
  64                                 'wl_notificationtimestamp',
  65                                 array( 'wl_namespace' => $namespace, 'wl_title' => $this->mTitle->getDBkey(), 'wl_user' => $uid ),
  66                                 $fname );
  67                 else $notificationtimestamp = false;
  68
  69                 $use_index = $db->useIndexClause( 'rev_timestamp' );
  70                 $revision = $db->tableName( 'revision' );
  71
  72                 $limits = $offsets = "";
  73                 $dir = 0;
  74                 if ($wgRequest->getText("dir") == "prev")
  75                         $dir = 1;
  76
  77                 list($dirs, $oper) = array("DESC", "<");
  78                 if ($dir) {
  79                         list($dirs, $oper) = array("ASC", ">");
  80                 }
  81
  82                 if ($offset)
  83                         $offsets .= " AND rev_timestamp $oper '$offset' ";
  84                 if ($limit)
  85                         $limits .= " LIMIT $limitplus ";
  86
  87                 $sql = "SELECT rev_id,rev_user," .
  88                   "rev_comment,rev_user_text,rev_timestamp,rev_minor_edit ".
  89                   "FROM $revision $use_index " .
  90                   "WHERE rev_page=$id " .
  91                   $offsets .
  92                   "ORDER BY rev_timestamp $dirs " .
  93                   $limits;
  94                 $res = $db->query( $sql, $fname );
  95
  96                 $revs = $db->numRows( $res );
  97
  98                 if( $revs < $limitplus ) // the sql above tries to fetch one extra
  99                         $this->linesonpage = $revs;
 100                 else
 101                         $this->linesonpage = $revs - 1;
 102
 103                 $atend = ($revs < $limitplus);
 104
 105                 $this->mSkin = $wgUser->getSkin();
 106
 107                 $pages = array();
 108                 $lowts = 0;
 109                 while ($line = $db->fetchObject($res)) {
 110                         $pages[] = $line;
 111                 }
 112                 if ($dir) $pages = array_reverse($pages);
 113                 if (count($pages) > 1)
 114                         $lowts = $pages[count($pages) - 2]->rev_timestamp;
 115                 else
 116                         $lowts = $pages[count($pages) - 1]->rev_timestamp;
 117
 118
 119                 $prevurl = $wgTitle->escapeLocalURL("action=history&dir=prev&offset={$offset}&limit={$limit}");
 120                 $nexturl = $wgTitle->escapeLocalURL("action=history&offset={$lowts}&limit={$limit}");
 121                 $urls = array();
 122                 foreach (array(20, 50, 100, 250, 500) as $num) {
 123                         $urls[] = "<a href=\"".$wgTitle->escapeLocalURL(
 124                                 "action=history&offset={$offset}&limit={$num}")."\">".$wgLang->formatNum($num)."</a>";
 125                 }
 126                 $bits = implode($urls, ' | ');
 127                 $numbar = wfMsg("viewprevnext",
 128                                 "<a href=\"$prevurl\">".wfMsg("prevn", $limit)."</a>",
 129                                 "<a href=\"$nexturl\">".wfMsg("nextn", $limit)."</a>",
 130                                 $bits);
 131
 132                 $s = $numbar;
 133                 if($this->linesonpage > 0) {
 134                         $submitpart1 = '<input class="historysubmit" type="submit" accesskey="'.wfMsg('accesskey-compareselectedversions').
 135                         '" title="'.wfMsg('tooltip-compareselectedversions').'" value="'.wfMsg('compareselectedversions').'"';
 136                         $this->submitbuttonhtml1 = $submitpart1 . ' />';
 137                         $this->submitbuttonhtml2 = $submitpart1 . ' id="historysubmit" />';
 138                 }
 139                 $s .= $this->beginHistoryList();
 140                 $counter = 1;
 141                 foreach($pages as $line) {
 142                         $s .= $this->historyLine(
 143                                 $line->rev_timestamp, $line->rev_user,
 144                                 $line->rev_user_text, $namespace,
 145                                 $title, $line->rev_id,
 146                                 $line->rev_comment, ( $line->rev_minor_edit > 0 ),
 147                                 $counter,
 148                                 $notificationtimestamp,
 149                                 ($counter == 1 && $offset == 0)
 150                         );
 151                         $counter++;
 152                 }
 153                 $s .= $this->endHistoryList( !$atend );
 154                 $s .= $numbar;
 155                 $wgOut->addHTML( $s );
 156                 wfProfileOut( $fname );
 157         }
 158
 159         function beginHistoryList() {
 160                 global $wgTitle;
 161                 $this->lastdate = $this->lastline = '';
 162                 $s = '<p>' . wfMsg( 'histlegend' ) . '</p>';
 163                 $s .= '<form action="' . $wgTitle->escapeLocalURL( '-' ) . '" method="get">';
 164                 $prefixedkey = htmlspecialchars($wgTitle->getPrefixedDbKey());
 165                 $s .= "<input type='hidden' name='title' value=\"{$prefixedkey}\" />\n";
 166                 $s .= !empty($this->submitbuttonhtml1) ? $this->submitbuttonhtml1."\n":'';
 167                 $s .= '<ul id="pagehistory">';
 168                 return $s;
 169         }
 170
 171         function endHistoryList( $skip = false ) {
 172                 $last = wfMsg( 'last' );
 173
 174                 $s = $skip ? '' : preg_replace( "/!OLDID![0-9]+!/", $last, $this->lastline );
 175                 $s .= '</ul>';
 176                 $s .= !empty($this->submitbuttonhtml2) ? $this->submitbuttonhtml2 : '';
 177                 $s .= '</form>';
 178                 return $s;
 179         }
 180
 181         function historyLine( $ts, $u, $ut, $ns, $ttl, $oid, $c, $isminor, $counter = '', $notificationtimestamp = false, $latest = false ) {
 182                 global $wgLang, $wgContLang;
 183
 184                 static $message;
 185                 if( !isset( $message ) ) {
 186                         foreach( explode( ' ', 'cur last selectolderversionfordiff selectnewerversionfordiff minoreditletter' ) as $msg ) {
 187                                 $message[$msg] = wfMsg( $msg );
 188                         }
 189                 }
 190
 191                 if ( $oid && $this->lastline ) {
 192                         $ret = preg_replace( "/!OLDID!([0-9]+)!/", $this->mSkin->makeKnownLinkObj(
 193                           $this->mTitle, $message['last'], "diff=\\1&oldid={$oid}",'' ,'' ,' tabindex="'.$counter.'"' ), $this->lastline );
 194                 } else {
 195                         $ret = '';
 196                 }
 197                 $dt = $wgLang->timeanddate( $ts, true );
 198
 199                 if ( $oid ) {
 200                         $q = 'oldid='.$oid;
 201                 } else {
 202                         $q = '';
 203                 }
 204                 $link = $this->mSkin->makeKnownLinkObj( $this->mTitle, $dt, $q );
 205
 206                 if ( 0 == $u ) {
 207                         $contribsPage =& Title::makeTitle( NS_SPECIAL, 'Contributions' );
 208                         $ul = $this->mSkin->makeKnownLinkObj( $contribsPage,
 209                                 htmlspecialchars( $ut ), 'target=' . urlencode( $ut ) );
 210                 } else {
 211                         $userPage =& Title::makeTitle( NS_USER, $ut );
 212                         $ul = $this->mSkin->makeLinkObj( $userPage , htmlspecialchars( $ut ) );
 213                 }
 214
 215                 $s = '<li>';
 216                 if ( $oid && !$latest ) {
 217                         $curlink = $this->mSkin->makeKnownLinkObj( $this->mTitle, $message['cur'],
 218                           'diff=0&oldid='.$oid );
 219                 } else {
 220                         $curlink = $message['cur'];
 221                 }
 222                 $arbitrary = '';
 223                 if( $this->linesonpage > 1) {
 224                         # XXX: move title texts to javascript
 225                         $checkmark = '';
 226                         if ( !$oid || $latest ) {
 227                                 $arbitrary = '<input type="radio" style="visibility:hidden" name="oldid" value="'.$oid.'" title="'.$message['selectolderversionfordiff'].'" />';
 228                                 $checkmark = ' checked="checked"';
 229                         } else {
 230                                 if( $counter == 2 ) $checkmark = ' checked="checked"';
 231                                 $arbitrary = '<input type="radio" name="oldid" value="'.$oid.'" title="'.$message['selectolderversionfordiff'].'"'.$checkmark.' />';
 232                                 $checkmark = '';
 233                         }
 234                         $arbitrary .= '<input type="radio" name="diff" value="'.$oid.'" title="'.$message['selectnewerversionfordiff'].'"'.$checkmark.' />';
 235                 }
 236                 $s .= "({$curlink}) (!OLDID!{$oid}!) $arbitrary {$link} <span class='user'>{$ul}</span>";
 237                 $s .= $isminor ? ' <span class="minor">'.$message['minoreditletter'].'</span>': '' ;
 238
 239
 240                 $s .= $this->mSkin->commentBlock( $c, $this->mTitle );
 241                 if ($notificationtimestamp && ($ts >= $notificationtimestamp)) {
 242                         $s .= wfMsg( 'updatedmarker' );
 243                 }
 244                 $s .= '</li>';
 245
 246                 $this->lastline = $s;
 247                 return $ret;
 248         }
 249
 250 }
 251
 252 ?>