567 lines
15 KiB
PHP
567 lines
15 KiB
PHP
<?php
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/**
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* Page history
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*
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* Split off from Article.php and Skin.php, 2003-12-22
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* @package MediaWiki
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*/
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define('DIR_PREV', 0);
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define('DIR_NEXT', 1);
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/**
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* This class handles printing the history page for an article. In order to
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* be efficient, it uses timestamps rather than offsets for paging, to avoid
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* costly LIMIT,offset queries.
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*
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* Construct it by passing in an Article, and call $h->history() to print the
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* history.
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*
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* @package MediaWiki
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*/
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class PageHistory {
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var $mArticle, $mTitle, $mSkin;
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var $lastdate;
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var $linesonpage;
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var $mNotificationTimestamp;
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var $mLatestId = null;
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/**
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* Construct a new PageHistory.
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*
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* @param Article $article
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* @returns nothing
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*/
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function PageHistory($article) {
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global $wgUser;
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$this->mArticle =& $article;
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$this->mTitle =& $article->mTitle;
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$this->mNotificationTimestamp = NULL;
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$this->mSkin = $wgUser->getSkin();
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$this->defaultLimit = 50;
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}
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/**
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* Print the history page for an article.
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*
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* @returns nothing
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*/
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function history() {
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global $wgUser, $wgOut, $wgRequest, $wgTitle;
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/*
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* Allow client caching.
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*/
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if( $wgOut->checkLastModified( $this->mArticle->getTimestamp() ) )
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/* Client cache fresh and headers sent, nothing more to do. */
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return;
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$fname = 'PageHistory::history';
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wfProfileIn( $fname );
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/*
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* Setup page variables.
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*/
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$wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
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$wgOut->setSubtitle( wfMsg( 'revhistory' ) );
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$wgOut->setArticleFlag( false );
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$wgOut->setArticleRelated( true );
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$wgOut->setRobotpolicy( 'noindex,nofollow' );
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/*
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* Fail if article doesn't exist.
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*/
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if( !$this->mTitle->exists() ) {
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$wgOut->addWikiText( wfMsg( 'nohistory' ) );
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wfProfileOut( $fname );
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return;
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}
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$dbr =& wfGetDB(DB_SLAVE);
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/*
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* Extract limit, the number of revisions to show, and
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* offset, the timestamp to begin at, from the URL.
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*/
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$limit = $wgRequest->getInt('limit', $this->defaultLimit);
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$offset = $wgRequest->getText('offset');
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/* Offset must be an integral. */
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if (!strlen($offset) || !preg_match("/^[0-9]+$/", $offset))
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$offset = 0;
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# $offset = $dbr->timestamp($offset);
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$dboffset = $offset === 0 ? 0 : $dbr->timestamp($offset);
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/*
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* "go=last" means to jump to the last history page.
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*/
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if (($gowhere = $wgRequest->getText("go")) !== NULL) {
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switch ($gowhere) {
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case "first":
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if (($lastid = $this->getLastOffsetForPaging($this->mTitle->getArticleID(), $limit)) === NULL)
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break;
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$gourl = $wgTitle->getLocalURL("action=history&limit={$limit}&offset=".
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wfTimestamp(TS_MW, $lastid));
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break;
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default:
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$gourl = NULL;
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}
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if (!is_null($gourl)) {
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$wgOut->redirect($gourl);
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return;
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}
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}
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/*
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* Fetch revisions.
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*
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* If the user clicked "previous", we retrieve the revisions backwards,
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* then reverse them. This is to avoid needing to know the timestamp of
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* previous revisions when generating the URL.
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*/
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$direction = $this->getDirection();
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$revisions = $this->fetchRevisions($limit, $dboffset, $direction);
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$navbar = $this->makeNavbar($revisions, $offset, $limit, $direction);
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/*
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* We fetch one more revision than needed to get the timestamp of the
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* one after this page (and to know if it exists).
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*
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* linesonpage stores the actual number of lines.
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*/
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if (count($revisions) < $limit + 1)
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$this->linesonpage = count($revisions);
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else
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$this->linesonpage = count($revisions) - 1;
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/* Un-reverse revisions */
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if ($direction == DIR_PREV)
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$revisions = array_reverse($revisions);
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/*
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* Print the top navbar.
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*/
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$s = $navbar;
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$s .= $this->beginHistoryList();
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$counter = 1;
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/*
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* Print each revision, excluding the one-past-the-end, if any.
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*/
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foreach (array_slice($revisions, 0, $limit) as $i => $line) {
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$latest = !$i && $offset == 0;
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$firstInList = !$i;
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$next = isset( $revisions[$i + 1] ) ? $revisions[$i + 1 ] : null;
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$s .= $this->historyLine($line, $next, $counter, $this->getNotificationTimestamp(), $latest, $firstInList);
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$counter++;
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}
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/*
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* End navbar.
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*/
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$s .= $this->endHistoryList();
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$s .= $navbar;
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$wgOut->addHTML( $s );
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wfProfileOut( $fname );
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}
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/** @todo document */
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function beginHistoryList() {
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global $wgTitle;
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$this->lastdate = '';
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$s = wfMsgWikiHtml( 'histlegend' );
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$s .= '<form action="' . $wgTitle->escapeLocalURL( '-' ) . '" method="get">';
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$prefixedkey = htmlspecialchars($wgTitle->getPrefixedDbKey());
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// The following line is SUPPOSED to have double-quotes around the
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// $prefixedkey variable, because htmlspecialchars() doesn't escape
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// single-quotes.
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//
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// On at least two occasions people have changed it to single-quotes,
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// which creates invalid HTML and incorrect display of the resulting
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// link.
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//
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// Please do not break this a third time. Thank you for your kind
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// consideration and cooperation.
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//
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$s .= "<input type='hidden' name='title' value=\"{$prefixedkey}\" />\n";
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$s .= $this->submitButton();
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$s .= '<ul id="pagehistory">' . "\n";
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return $s;
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}
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/** @todo document */
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function endHistoryList() {
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$last = wfMsg( 'last' );
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$s = '</ul>';
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$s .= $this->submitButton( array( 'id' => 'historysubmit' ) );
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$s .= '</form>';
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return $s;
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}
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/** @todo document */
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function submitButton( $bits = array() ) {
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return ( $this->linesonpage > 0 )
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? wfElement( 'input', array_merge( $bits,
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array(
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'class' => 'historysubmit',
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'type' => 'submit',
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'accesskey' => wfMsgHtml( 'accesskey-compareselectedversions' ),
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'title' => wfMsgHtml( 'tooltip-compareselectedversions' ),
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'value' => wfMsgHtml( 'compareselectedversions' ),
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) ) )
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: '';
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}
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/** @todo document */
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function historyLine( $row, $next, $counter = '', $notificationtimestamp = false, $latest = false, $firstInList = false ) {
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if ( 0 == $row->rev_user ) {
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$contribsPage =& Title::makeTitle( NS_SPECIAL, 'Contributions' );
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$ul = $this->mSkin->makeKnownLinkObj( $contribsPage,
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htmlspecialchars( $row->rev_user_text ),
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'target=' . urlencode( $row->rev_user_text ) );
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} else {
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$userPage =& Title::makeTitle( NS_USER, $row->rev_user_text );
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$ul = $this->mSkin->makeLinkObj( $userPage , htmlspecialchars( $row->rev_user_text ) );
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}
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$s = '<li>';
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/* This feature is not yet used according to schema */
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if( $row->rev_deleted ) {
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$s .= '<span class="history-deleted">';
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}
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$curlink = $this->curLink( $row, $latest );
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$lastlink = $this->lastLink( $row, $next, $counter );
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$arbitrary = $this->diffButtons( $row, $firstInList, $counter );
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$link = $this->revLink( $row );
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$s .= "($curlink) ($lastlink) $arbitrary $link <span class='history-user'>$ul</span>";
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if( $row->rev_minor_edit ) {
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$s .= ' ' . wfElement( 'span', array( 'class' => 'minor' ), wfMsgHtml( 'minoreditletter') );
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}
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$s .= $this->mSkin->commentBlock( $row->rev_comment, $this->mTitle );
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if ($notificationtimestamp && ($row->rev_timestamp >= $notificationtimestamp)) {
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$s .= ' <span class="updatedmarker">' . wfMsgHtml( 'updatedmarker' ) . '</span>';
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}
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if( $row->rev_deleted ) {
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$s .= '</span> ' . wfMsgHtml( 'deletedrev' );
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}
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$s .= "</li>\n";
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return $s;
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}
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/** @todo document */
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function revLink( $row ) {
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global $wgUser, $wgLang;
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$date = $wgLang->timeanddate( wfTimestamp(TS_MW, $row->rev_timestamp), true );
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if( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) {
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return $date;
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} else {
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return $this->mSkin->makeKnownLinkObj(
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$this->mTitle, $date, "oldid={$row->rev_id}" );
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}
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}
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/** @todo document */
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function curLink( $row, $latest ) {
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global $wgUser;
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$cur = wfMsgHtml( 'cur' );
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if( $latest
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|| ( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) ) {
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return $cur;
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} else {
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return $this->mSkin->makeKnownLinkObj(
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$this->mTitle, $cur,
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'diff=' . $this->getLatestID() .
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"&oldid={$row->rev_id}" );
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}
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}
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/** @todo document */
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function lastLink( $row, $next, $counter ) {
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global $wgUser;
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$last = htmlspecialchars( wfMsg( 'last' ) );
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if( is_null( $next ) ) {
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if( $row->rev_timestamp == $this->getEarliestOffset() ) {
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return $last;
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} else {
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// Cut off by paging; there are more behind us...
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return $this->mSkin->makeKnownLinkObj(
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$this->mTitle,
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$last,
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"diff={$row->rev_id}&oldid=prev" );
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}
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} elseif( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) {
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return $last;
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} else {
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return $this->mSkin->makeKnownLinkObj(
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$this->mTitle,
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$last,
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"diff={$row->rev_id}&oldid={$next->rev_id}"
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/*,
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'',
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'',
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"tabindex={$counter}"*/ );
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}
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}
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/** @todo document */
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function diffButtons( $row, $firstInList, $counter ) {
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global $wgUser;
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if( $this->linesonpage > 1) {
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$radio = array(
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'type' => 'radio',
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'value' => $row->rev_id,
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# do we really need to flood this on every item?
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# 'title' => wfMsgHtml( 'selectolderversionfordiff' )
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);
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if( $row->rev_deleted && !$wgUser->isAllowed( 'undelete' ) ) {
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$radio['disabled'] = 'disabled';
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}
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/** @todo: move title texts to javascript */
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if ( $firstInList ) {
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$first = wfElement( 'input', array_merge(
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$radio,
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array(
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'style' => 'visibility:hidden',
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'name' => 'oldid' ) ) );
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$checkmark = array( 'checked' => 'checked' );
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} else {
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if( $counter == 2 ) {
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$checkmark = array( 'checked' => 'checked' );
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} else {
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$checkmark = array();
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}
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$first = wfElement( 'input', array_merge(
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$radio,
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$checkmark,
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array( 'name' => 'oldid' ) ) );
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$checkmark = array();
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}
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$second = wfElement( 'input', array_merge(
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$radio,
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$checkmark,
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array( 'name' => 'diff' ) ) );
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return $first . $second;
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} else {
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return '';
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}
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}
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/** @todo document */
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function getLatestOffset( $id = null ) {
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if ( $id === null) $id = $this->mTitle->getArticleID();
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return $this->getExtremeOffset( $id, 'max' );
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}
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/** @todo document */
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function getEarliestOffset( $id = null ) {
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if ( $id === null) $id = $this->mTitle->getArticleID();
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return $this->getExtremeOffset( $id, 'min' );
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}
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/** @todo document */
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function getExtremeOffset( $id, $func ) {
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$db =& wfGetDB(DB_SLAVE);
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return $db->selectField( 'revision',
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"$func(rev_timestamp)",
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array( 'rev_page' => $id ),
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'PageHistory::getExtremeOffset' );
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}
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/** @todo document */
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function getLatestId() {
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if( is_null( $this->mLatestId ) ) {
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$id = $this->mTitle->getArticleID();
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$db =& wfGetDB(DB_SLAVE);
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$this->mLatestId = $db->selectField( 'revision',
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"max(rev_id)",
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array( 'rev_page' => $id ),
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'PageHistory::getLatestID' );
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}
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return $this->mLatestId;
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}
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/** @todo document */
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function getLastOffsetForPaging( $id, $step ) {
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$fname = 'PageHistory::getLastOffsetForPaging';
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$dbr =& wfGetDB(DB_SLAVE);
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$res = $dbr->select(
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'revision',
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'rev_timestamp',
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"rev_page=$id",
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$fname,
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array('ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => $step));
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$n = $dbr->numRows( $res );
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$last = null;
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while( $obj = $dbr->fetchObject( $res ) ) {
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$last = $obj->rev_timestamp;
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}
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$dbr->freeResult( $res );
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return $last;
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}
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/**
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* @return returns the direction of browsing watchlist
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*/
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function getDirection() {
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global $wgRequest;
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if ($wgRequest->getText("dir") == "prev")
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return DIR_PREV;
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else
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return DIR_NEXT;
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}
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/** @todo document */
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function fetchRevisions($limit, $offset, $direction) {
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global $wgUser, $wgShowUpdatedMarker;
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$fname = 'PageHistory::fetchRevisions';
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$dbr =& wfGetDB( DB_SLAVE );
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if ($direction == DIR_PREV)
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list($dirs, $oper) = array("ASC", ">=");
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else /* $direction == DIR_NEXT */
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list($dirs, $oper) = array("DESC", "<=");
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if ($offset)
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$offsets = array("rev_timestamp $oper '$offset'");
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else
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$offsets = array();
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$page_id = $this->mTitle->getArticleID();
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$res = $dbr->select(
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'revision',
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array('rev_id', 'rev_user', 'rev_comment', 'rev_user_text',
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'rev_timestamp', 'rev_minor_edit', 'rev_deleted'),
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array_merge(array("rev_page=$page_id"), $offsets),
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$fname,
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array('ORDER BY' => "rev_timestamp $dirs",
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'USE INDEX' => 'page_timestamp', 'LIMIT' => $limit)
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);
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$result = array();
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while (($obj = $dbr->fetchObject($res)) != NULL)
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$result[] = $obj;
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return $result;
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}
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/** @todo document */
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function getNotificationTimestamp() {
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global $wgUser, $wgShowUpdatedMarker;
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$fname = 'PageHistory::getNotficationTimestamp';
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if ($this->mNotificationTimestamp !== NULL)
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return $this->mNotificationTimestamp;
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if ($wgUser->isAnon() || !$wgShowUpdatedMarker)
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return $this->mNotificationTimestamp = false;
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$dbr =& wfGetDB(DB_SLAVE);
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$this->mNotificationTimestamp = $dbr->selectField(
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'watchlist',
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'wl_notificationtimestamp',
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array( 'wl_namespace' => $this->mTitle->getNamespace(),
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'wl_title' => $this->mTitle->getDBkey(),
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'wl_user' => $wgUser->getID()
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),
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$fname);
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return $this->mNotificationTimestamp;
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}
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/** @todo document */
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function makeNavbar($revisions, $offset, $limit, $direction) {
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global $wgTitle, $wgLang;
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$revisions = array_slice($revisions, 0, $limit);
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$latestTimestamp = wfTimestamp(TS_MW, $this->getLatestOffset());
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$earliestTimestamp = wfTimestamp(TS_MW, $this->getEarliestOffset());
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/*
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* When we're displaying previous revisions, we need to reverse
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* the array, because it's queried in reverse order.
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*/
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if ($direction == DIR_PREV)
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$revisions = array_reverse($revisions);
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/*
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* lowts is the timestamp of the first revision on this page.
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* hights is the timestamp of the last revision.
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*/
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$lowts = $hights = 0;
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if( count( $revisions ) ) {
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$latestShown = wfTimestamp(TS_MW, $revisions[0]->rev_timestamp);
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$earliestShown = wfTimestamp(TS_MW, $revisions[count($revisions) - 1]->rev_timestamp);
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}
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/* Don't announce the limit everywhere if it's the default */
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$usefulLimit = $limit == $this->defaultLimit ? '' : $limit;
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$urls = array();
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foreach (array(20, 50, 100, 250, 500) as $num) {
|
|
$urls[] = $this->MakeLink( $wgLang->formatNum($num),
|
|
array('offset' => $offset == 0 ? '' : wfTimestamp(TS_MW, $offset), 'limit' => $num, ) );
|
|
}
|
|
|
|
$bits = implode($urls, ' | ');
|
|
|
|
wfDebug("latestShown=$latestShown latestTimestamp=$latestTimestamp\n");
|
|
if( $latestShown < $latestTimestamp ) {
|
|
$prevtext = $this->MakeLink( wfMsgHtml("prevn", $limit),
|
|
array( 'dir' => 'prev', 'offset' => $latestShown, 'limit' => $usefulLimit ) );
|
|
$lasttext = $this->MakeLink( wfMsgHtml('histlast'),
|
|
array( 'limit' => $usefulLimit ) );
|
|
} else {
|
|
$prevtext = wfMsgHtml("prevn", $limit);
|
|
$lasttext = wfMsgHtml('histlast');
|
|
}
|
|
|
|
wfDebug("earliestShown=$earliestShown earliestTimestamp=$earliestTimestamp\n");
|
|
if( $earliestShown > $earliestTimestamp ) {
|
|
$nexttext = $this->MakeLink( wfMsgHtml("nextn", $limit),
|
|
array( 'offset' => $earliestShown, 'limit' => $usefulLimit ) );
|
|
$firsttext = $this->MakeLink( wfMsgHtml('histfirst'),
|
|
array( 'go' => 'first', 'limit' => $usefulLimit ) );
|
|
} else {
|
|
$nexttext = wfMsgHtml("nextn", $limit);
|
|
$firsttext = wfMsgHtml('histfirst');
|
|
}
|
|
|
|
$firstlast = "($lasttext | $firsttext)";
|
|
|
|
return "$firstlast " . wfMsgHtml("viewprevnext", $prevtext, $nexttext, $bits);
|
|
}
|
|
|
|
function MakeLink($text, $query = NULL) {
|
|
if ( $query === null ) return $text;
|
|
return $this->mSkin->makeKnownLinkObj(
|
|
$this->mTitle, $text,
|
|
wfArrayToCGI( $query, array( 'action' => 'history' )));
|
|
}
|
|
|
|
|
|
}
|
|
|
|
?>
|