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                 $firstlast = "(<a href=\"$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                 if ($offset)
 155                         $prevtext = "<a href=\"$prevurl\">".wfMsg("prevn", $limit)."</a>";
 156                 else    $prevtext = wfMsg("prevn", $limit);
 157                 if ($revs >= $limitplus)
 158                         $nexttext = "<a href=\"$nexturl\">".wfMsg("nextn", $limit)."</a>";
 159                 else    $nexttext = wfMsg("nextn", $limit);
 160
 161                 $numbar = "$firstlast " . wfMsg("viewprevnext", $prevtext, $nexttext, $bits);
 162
 163                 $s = $numbar;
 164                 $s .= $this->beginHistoryList();
 165                 $counter = 1;
 166                 foreach($pages as $i => $line) {
 167                         $first = ($counter == 1 && $offset == 0);
 168                         $next = isset( $pages[$i + 1] ) ? $pages[$i + 1 ] : null;
 169                         $s .= $this->historyLine( $line, $next, $counter, $notificationtimestamp, $first );
 170                         $counter++;
 171                 }
 172                 $s .= $this->endHistoryList( !$atend );
 173                 $s .= $numbar;
 174
 175                 # Validation line
 176                 if ( isset ( $wgUseValidation ) && $wgUseValidation ) {
 177                         $s .= "<p>" . Validation::link2statistics ( $this->mArticle ) . "</p>" ;
 178                         }
 179
 180                 $wgOut->addHTML( $s );
 181                 wfProfileOut( $fname );
 182         }
 183
 184         function beginHistoryList() {
 185                 global $wgTitle;
 186                 $this->lastdate = '';
 187                 $s = '<p>' . wfMsg( 'histlegend' ) . '</p>';
 188                 $s .= '<form action="' . $wgTitle->escapeLocalURL( '-' ) . '" method="get">';
 189                 $prefixedkey = htmlspecialchars($wgTitle->getPrefixedDbKey());
 190                 $s .= "<input type='hidden' name='title' value=\"{$prefixedkey}\" />\n";
 191                 $s .= $this->submitButton();
 192                 $s .= '<ul id="pagehistory">';
 193                 return $s;
 194         }
 195
 196         function endHistoryList() {
 197                 $last = wfMsg( 'last' );
 198
 199                 $s = '</ul>';
 200                 $s .= $this->submitButton( array( 'id' => 'historysubmit' ) );
 201                 $s .= '</form>';
 202                 return $s;
 203         }
 204
 205         function submitButton( $bits = array() ) {
 206                 return ( $this->linesonpage > 0 )
 207                         ? wfElement( 'input', array_merge( $bits,
 208                                 array(
 209                                         'class'     => 'historysubmit',
 210                                         'type'      => 'submit',
 211                                         'accesskey' => wfMsg( 'accesskey-compareselectedversions' ),
 212                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 213                                         'value'     => wfMsg( 'compareselectedversions' ),
 214                                 ) ) )
 215                         : '';
 216         }
 217
 218         function historyLine( $row, $next, $counter = '', $notificationtimestamp = false, $latest = false ) {
 219                 global $wgLang, $wgContLang;
 220
 221                 static $message;
 222                 if( !isset( $message ) ) {
 223                         foreach( explode( ' ', 'cur last selectolderversionfordiff selectnewerversionfordiff minoreditletter' ) as $msg ) {
 224                                 $message[$msg] = wfMsg( $msg );
 225                         }
 226                 }
 227
 228                 $link = $this->revLink( $row );
 229
 230                 if ( 0 == $row->rev_user ) {
 231                         $contribsPage =& Title::makeTitle( NS_SPECIAL, 'Contributions' );
 232                         $ul = $this->mSkin->makeKnownLinkObj( $contribsPage,
 233                                 htmlspecialchars( $row->rev_user_text ),
 234                                 'target=' . urlencode( $row->rev_user_text ) );
 235                 } else {
 236                         $userPage =& Title::makeTitle( NS_USER, $row->rev_user_text );
 237                         $ul = $this->mSkin->makeLinkObj( $userPage , htmlspecialchars( $row->rev_user_text ) );
 238                 }
 239
 240                 $s = '<li>';
 241                 if( $row->rev_deleted ) {
 242                         $s .= '<span class="deleted">';
 243                 }
 244                 $curlink = $this->curLink( $row, $latest );
 245                 $lastlink = $this->lastLink( $row, $next, $counter );
 246                 $arbitrary = $this->diffButtons( $row, $latest, $counter );
 247                 $s .= "({$curlink}) ({$lastlink}) $arbitrary {$link} <span class='user'>{$ul}</span>";
 248
 249                 if( $row->rev_minor_edit ) {
 250                         $s .= ' ' . wfElement( 'span', array( 'class' => 'minor' ), $message['minoreditletter'] );
 251                 }
 252
 253
 254                 $s .= $this->mSkin->commentBlock( $row->rev_comment, $this->mTitle );
 255                 if ($notificationtimestamp && ($row->rev_timestamp >= $notificationtimestamp)) {
 256                         $s .= wfMsg( 'updatedmarker' );
 257                 }
 258                 if( $row->rev_deleted ) {
 259                         $s .= "</span> " . htmlspecialchars( wfMsg( 'deletedrev' ) );
 260                 }
 261                 $s .= '</li>';
 262
 263                 return $s;
 264         }
 265
 266         function revLink( $row ) {
 267                 global $wgUser, $wgLang;
 268                 $date = $wgLang->timeanddate( $row->rev_timestamp, true );
 269                 if( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) {
 270                         return $date;
 271                 } else {
 272                         return $this->mSkin->makeKnownLinkObj(
 273                                 $this->mTitle,
 274                                 $date,
 275                                 'oldid='.$row->rev_id );
 276                 }
 277         }
 278
 279         function curLink( $row, $latest ) {
 280                 global $wgUser;
 281                 $cur = htmlspecialchars( wfMsg( 'cur' ) );
 282                 if( $latest
 283                         || ( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) ) {
 284                         return $cur;
 285                 } else {
 286                         return $this->mSkin->makeKnownLinkObj(
 287                                 $this->mTitle,
 288                                 $cur,
 289                                 'diff=0&oldid=' . $row->rev_id );
 290                 }
 291         }
 292
 293         function lastLink( $row, $next, $counter ) {
 294                 global $wgUser;
 295                 $last = htmlspecialchars( wfMsg( 'last' ) );
 296                 if( is_null( $next )
 297                         || ( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) ) {
 298                         return $last;
 299                 } else {
 300                         return $this->mSkin->makeKnownLinkObj(
 301                           $this->mTitle,
 302                           $last,
 303                           "diff={$row->rev_id}&oldid={$next->rev_id}",
 304                           '',
 305                           '',
 306                           ' tabindex="'.$counter.'"' );
 307                 }
 308         }
 309
 310         function diffButtons( $row, $latest, $counter ) {
 311                 global $wgUser;
 312                 if( $this->linesonpage > 1) {
 313                         $radio = array(
 314                                 'type'  => 'radio',
 315                                 'value' => $row->rev_id,
 316                                 'title' => wfMsg( 'selectolderversionfordiff' )
 317                         );
 318                         if( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) {
 319                                 $radio['disabled'] = 'disabled';
 320                         }
 321
 322                         # XXX: move title texts to javascript
 323                         if ( $latest ) {
 324                                 $first = wfElement( 'input', array_merge(
 325                                         $radio,
 326                                         array(
 327                                                 'style' => 'visibility:hidden',
 328                                                 'name'  => 'oldid' ) ) );
 329                                 $checkmark = array( 'checked' => 'checked' );
 330                         } else {
 331                                 if( $counter == 2 ) {
 332                                         $checkmark = array( 'checked' => 'checked' );
 333                                 } else {
 334                                         $checkmark = array();
 335                                 }
 336                                 $first = wfElement( 'input', array_merge(
 337                                         $radio,
 338                                         $checkmark,
 339                                         array( 'name'  => 'oldid' ) ) );
 340                                 $checkmark = array();
 341                         }
 342                         $second = wfElement( 'input', array_merge(
 343                                 $radio,
 344                                 $checkmark,
 345                                 array( 'name'  => 'diff' ) ) );
 346                         return $first . $second;
 347                 } else {
 348                         return '';
 349                 }
 350         }
 351
 352         function getLastOffset($id, $step = 50) {
 353                 $db =& wfGetDB(DB_SLAVE);
 354                 $sql = "SELECT rev_timestamp FROM revision WHERE rev_page = $id ORDER BY rev_timestamp ASC LIMIT $step";
 355                 $res = $db->query($sql, "getLastOffset");
 356                 $n = $db->numRows($res);
 357
 358                 if ($n == 0)
 359                         return NULL;
 360
 361                 while ($n--)
 362                         $obj = $db->fetchObject($res);
 363                 return $obj->rev_timestamp;
 364         }
 365 }
 366
 367 ?>