112 lines
3.5 KiB
PHP
112 lines
3.5 KiB
PHP
<?php
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class VersionFeed_Controller extends Extension {
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static $allowed_actions = array(
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'changes',
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'allchanges'
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);
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function onAfterInit() {
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// RSS feed for per-page changes.
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if ($this->owner->PublicHistory) {
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RSSFeed::linkToFeed($this->owner->Link() . 'changes',
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sprintf(
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_t('RSSHistory.SINGLEPAGEFEEDTITLE', 'Updates to %s page'),
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$this->owner->Title
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)
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);
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}
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$this->linkToAllSiteRSSFeed();
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return $this;
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}
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/**
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* Get page-specific changes in a RSS feed.
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*/
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function changes() {
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if(!$this->owner->PublicHistory) throw new SS_HTTPResponse_Exception('Page history not viewable', 404);;
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// Cache the diffs to remove DOS possibility.
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$cache = SS_Cache::factory('VersionFeed_Controller');
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$cache->setOption('automatic_serialization', true);
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$key = implode('_', array('changes', $this->owner->ID, $this->owner->Version));
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$entries = $cache->load($key);
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if(!$entries || isset($_GET['flush'])) {
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$entries = $this->owner->getDiffedChanges();
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$cache->save($entries, $key);
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}
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// Generate the output.
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$title = sprintf(_t('RSSHistory.SINGLEPAGEFEEDTITLE', 'Updates to %s page'), $this->owner->Title);
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$rss = new RSSFeed($entries, $this->owner->request->getURL(), $title, '', 'Title', '', null);
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$rss->setTemplate('Page_changes_rss');
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return $rss->outputToBrowser();
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}
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/**
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* Get all changes from the site in a RSS feed.
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*/
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function allchanges() {
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$latestChanges = DB::query('SELECT * FROM "SiteTree_versions" WHERE "WasPublished"=\'1\' AND "CanViewType" IN (\'Anyone\', \'Inherit\') AND "ShowInSearch"=1 AND ("PublicHistory" IS NULL OR "PublicHistory" = \'1\') ORDER BY "LastEdited" DESC LIMIT 20');
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$lastChange = $latestChanges->record();
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$latestChanges->rewind();
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if ($lastChange) {
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// Cache the diffs to remove DOS possibility.
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$member = Member::currentUser();
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$cache = SS_Cache::factory('VersionFeed_Controller');
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$cache->setOption('automatic_serialization', true);
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$key = 'allchanges' . preg_replace('#[^a-zA-Z0-9_]#', '', $lastChange['LastEdited']) .
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($member ? $member->ID : 'public');
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$changeList = $cache->load($key);
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if(!$changeList || isset($_GET['flush'])) {
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$changeList = new ArrayList();
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foreach ($latestChanges as $record) {
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// Check if the page should be visible.
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// WARNING: although we are providing historical details, we check the current configuration.
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$page = SiteTree::get()->filter(array('ID'=>$record['RecordID']))->First();
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if (!$page->canView(new Member())) continue;
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// Get the diff to the previous version.
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$version = new Versioned_Version($record);
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$changes = $version->getDiffedChanges($version->Version, false);
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if ($changes && $changes->Count()) $changeList->push($changes->First());
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}
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$cache->save($changeList, $key);
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}
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} else {
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$changeList = new ArrayList();
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}
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// Produce output
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$rss = new RSSFeed($changeList, $this->owner->request->getURL(), $this->linkToAllSitesRSSFeedTitle(), '', 'Title', '', null);
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$rss->setTemplate('Page_allchanges_rss');
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return $rss->outputToBrowser();
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}
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function linkToAllSiteRSSFeed() {
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// RSS feed to all-site changes.
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$title = Convert::raw2xml($this->linkToAllSitesRSSFeedTitle());
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$url = $this->owner->getSiteRSSLink();
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Requirements::insertHeadTags(
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'<link rel="alternate nofollow" type="application/rss+xml" title="' . $title .
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'" href="' . $url . '" />');
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}
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function linkToAllSitesRSSFeedTitle() {
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return sprintf(_t('RSSHistory.SITEFEEDTITLE', 'Updates to %s'), SiteConfig::current_site_config()->Title);
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}
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}
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