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 $lastline, $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 ".
  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 = $numbar;
 136                 if($this->linesonpage > 0) {
 137                         $submitpart1 = '<input class="historysubmit" type="submit" accesskey="'.wfMsg('accesskey-compareselectedversions').
 138                         '" title="'.wfMsg('tooltip-compareselectedversions').'" value="'.wfMsg('compareselectedversions').'"';
 139                         $this->submitbuttonhtml1 = $submitpart1 . ' />';
 140                         $this->submitbuttonhtml2 = $submitpart1 . ' id="historysubmit" />';
 141                 }
 142                 $s .= $this->beginHistoryList();
 143                 $counter = 1;
 144                 foreach($pages as $line) {
 145                         $s .= $this->historyLine(
 146                                 $line->rev_timestamp, $line->rev_user,
 147                                 $line->rev_user_text, $namespace,
 148                                 $title, $line->rev_id,
 149                                 $line->rev_comment, ( $line->rev_minor_edit > 0 ),
 150                                 $counter,
 151                                 $notificationtimestamp,
 152                                 ($counter == 1 && $offset == 0)
 153                         );
 154                         $counter++;
 155                 }
 156                 $s .= $this->endHistoryList( !$atend );
 157                 $s .= $numbar;
 158
 159                 # Validation line
 160                 if ( isset ( $wgUseValidation ) && $wgUseValidation ) {
 161                         $s .= "<p>" . Validation::link2statistics ( $this->mArticle ) . "</p>" ;
 162                         }
 163
 164                 $wgOut->addHTML( $s );
 165                 wfProfileOut( $fname );
 166         }
 167
 168         function beginHistoryList() {
 169                 global $wgTitle;
 170                 $this->lastdate = $this->lastline = '';
 171                 $s = '<p>' . wfMsg( 'histlegend' ) . '</p>';
 172                 $s .= '<form action="' . $wgTitle->escapeLocalURL( '-' ) . '" method="get">';
 173                 $prefixedkey = htmlspecialchars($wgTitle->getPrefixedDbKey());
 174                 $s .= "<input type='hidden' name='title' value=\"{$prefixedkey}\" />\n";
 175                 $s .= !empty($this->submitbuttonhtml1) ? $this->submitbuttonhtml1."\n":'';
 176                 $s .= '<ul id="pagehistory">';
 177                 return $s;
 178         }
 179
 180         function endHistoryList( $skip = false ) {
 181                 $last = wfMsg( 'last' );
 182
 183                 $s = $skip ? '' : preg_replace( "/!OLDID![0-9]+!/", $last, $this->lastline );
 184                 $s .= '</ul>';
 185                 $s .= !empty($this->submitbuttonhtml2) ? $this->submitbuttonhtml2 : '';
 186                 $s .= '</form>';
 187                 return $s;
 188         }
 189
 190         function historyLine( $ts, $u, $ut, $ns, $ttl, $oid, $c, $isminor, $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                 if ( $oid && $this->lastline ) {
 201                         $ret = preg_replace( "/!OLDID!([0-9]+)!/", $this->mSkin->makeKnownLinkObj(
 202                           $this->mTitle, $message['last'], "diff=\\1&oldid={$oid}",'' ,'' ,' tabindex="'.$counter.'"' ), $this->lastline );
 203                 } else {
 204                         $ret = '';
 205                 }
 206                 $dt = $wgLang->timeanddate( $ts, true );
 207
 208                 if ( $oid ) {
 209                         $q = 'oldid='.$oid;
 210                 } else {
 211                         $q = '';
 212                 }
 213                 $link = $this->mSkin->makeKnownLinkObj( $this->mTitle, $dt, $q );
 214
 215                 if ( 0 == $u ) {
 216                         $contribsPage =& Title::makeTitle( NS_SPECIAL, 'Contributions' );
 217                         $ul = $this->mSkin->makeKnownLinkObj( $contribsPage,
 218                                 htmlspecialchars( $ut ), 'target=' . urlencode( $ut ) );
 219                 } else {
 220                         $userPage =& Title::makeTitle( NS_USER, $ut );
 221                         $ul = $this->mSkin->makeLinkObj( $userPage , htmlspecialchars( $ut ) );
 222                 }
 223
 224                 $s = '<li>';
 225                 if ( $oid && !$latest ) {
 226                         $curlink = $this->mSkin->makeKnownLinkObj( $this->mTitle, $message['cur'],
 227                           'diff=0&oldid='.$oid );
 228                 } else {
 229                         $curlink = $message['cur'];
 230                 }
 231                 $arbitrary = '';
 232                 if( $this->linesonpage > 1) {
 233                         # XXX: move title texts to javascript
 234                         $checkmark = '';
 235                         if ( !$oid || $latest ) {
 236                                 $arbitrary = '<input type="radio" style="visibility:hidden" name="oldid" value="'.$oid.'" title="'.$message['selectolderversionfordiff'].'" />';
 237                                 $checkmark = ' checked="checked"';
 238                         } else {
 239                                 if( $counter == 2 ) $checkmark = ' checked="checked"';
 240                                 $arbitrary = '<input type="radio" name="oldid" value="'.$oid.'" title="'.$message['selectolderversionfordiff'].'"'.$checkmark.' />';
 241                                 $checkmark = '';
 242                         }
 243                         $arbitrary .= '<input type="radio" name="diff" value="'.$oid.'" title="'.$message['selectnewerversionfordiff'].'"'.$checkmark.' />';
 244                 }
 245                 $s .= "({$curlink}) (!OLDID!{$oid}!) $arbitrary {$link} <span class='user'>{$ul}</span>";
 246                 $s .= $isminor ? ' <span class="minor">'.$message['minoreditletter'].'</span>': '' ;
 247
 248
 249                 $s .= $this->mSkin->commentBlock( $c, $this->mTitle );
 250                 if ($notificationtimestamp && ($ts >= $notificationtimestamp)) {
 251                         $s .= wfMsg( 'updatedmarker' );
 252                 }
 253                 $s .= '</li>';
 254
 255                 $this->lastline = $s;
 256                 return $ret;
 257         }
 258
 259 }
 260
 261 ?>