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