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<?php |
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namespace SilverStripe\VersionFeed; |
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use SilverStripe\Core\Config\Config; |
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use SilverStripe\VersionFeed\VersionFeed; |
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use SilverStripe\Control\RSS\RSSFeed; |
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use SilverStripe\SiteConfig\SiteConfig; |
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use SilverStripe\ORM\DB; |
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use SilverStripe\Security\Member; |
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use SilverStripe\ORM\ArrayList; |
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use SilverStripe\CMS\Model\SiteTree; |
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use SilverStripe\Versioned\Versioned_Version; |
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use SilverStripe\Core\Convert; |
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use SilverStripe\View\Requirements; |
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use SilverStripe\Core\Extension; |
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use SilverStripe\VersionFeed\Filters\ContentFilter; |
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class VersionFeedController extends Extension |
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{ |
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private static $allowed_actions = array( |
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'changes', |
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'allchanges' |
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); |
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/** |
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* Content handler |
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* |
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* @var ContentFilter |
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*/ |
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protected $contentFilter; |
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/** |
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* Sets the content filter |
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* |
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* @param ContentFilter $contentFilter |
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*/ |
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public function setContentFilter(ContentFilter $contentFilter) |
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{ |
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$this->contentFilter = $contentFilter; |
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} |
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/** |
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* Evaluates the result of the given callback |
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* |
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* @param string $key Unique key for this |
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* @param callable $callback Callback for evaluating the content |
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* @return mixed Result of $callback() |
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*/ |
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protected function filterContent($key, $callback) |
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{ |
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if ($this->contentFilter) { |
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return $this->contentFilter->getContent($key, $callback); |
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} else { |
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return call_user_func($callback); |
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} |
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} |
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public function onAfterInit() |
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{ |
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$this->linkToPageRSSFeed(); |
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$this->linkToAllSiteRSSFeed(); |
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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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public function changes() |
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{ |
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// Check viewability of changes |
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if (!Config::inst()->get(VersionFeed::class, 'changes_enabled') |
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|| !$this->owner->PublicHistory |
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|| $this->owner->Version == '' |
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) { |
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return $this->owner->httpError(404, 'Page history not viewable'); |
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} |
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// Cache the diffs to remove DOS possibility. |
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$target = $this->owner; |
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$key = implode('_', array('changes', $this->owner->ID, $this->owner->Version)); |
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$entries = $this->filterContent($key, function () use ($target) { |
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return $target->getDiffList(null, Config::inst()->get(VersionFeed::class, 'changes_limit')); |
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}); |
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// Generate the output. |
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$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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public function allchanges() |
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{ |
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// Check viewability of allchanges |
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if (!Config::inst()->get(VersionFeed::class, 'allchanges_enabled') |
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|| !SiteConfig::current_site_config()->AllChangesEnabled |
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) { |
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return $this->owner->httpError(404, 'Global history not viewable'); |
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} |
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$limit = (int)Config::inst()->get(VersionFeed::class, 'allchanges_limit'); |
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$latestChanges = DB::query(' |
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SELECT * FROM "SiteTree_Versions" |
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WHERE "WasPublished" = \'1\' |
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AND "CanViewType" IN (\'Anyone\', \'Inherit\') |
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AND "ShowInSearch" = 1 |
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AND ("PublicHistory" IS NULL OR "PublicHistory" = \'1\') |
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ORDER BY "LastEdited" DESC LIMIT ' . $limit); |
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$lastChange = $latestChanges->record(); |
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$latestChanges->rewind(); |
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if ($lastChange) { |
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// Cache the diffs to remove DOS possibility. |
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$key = 'allchanges' |
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. preg_replace('#[^a-zA-Z0-9_]#', '', $lastChange['LastEdited']) |
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. (Member::currentUserID() ?: 'public'); |
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$changeList = $this->filterContent($key, function () use ($latestChanges) { |
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$changeList = new ArrayList(); |
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$canView = array(); |
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foreach ($latestChanges as $record) { |
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// Check if the page should be visible. |
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// WARNING: although we are providing historical details, we check the current configuration. |
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$id = $record['RecordID']; |
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if (!isset($canView[$id])) { |
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$page = SiteTree::get()->byID($id); |
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$canView[$id] = $page && $page->canView(new Member()); |
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} |
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if (!$canView[$id]) { |
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continue; |
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} |
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// Get the diff to the previous version. |
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$version = SiteTree::create($record); |
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if ($diff = $version->getDiff()) { |
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$changeList->push($diff); |
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} |
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} |
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return $changeList; |
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}); |
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} else { |
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$changeList = new ArrayList(); |
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} |
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// Produce output |
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$url = $this->owner->getRequest()->getURL(); |
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$rss = new RSSFeed($changeList, $url, $this->linkToAllSitesRSSFeedTitle(), '', 'Title', '', null); |
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$rss->setTemplate('Page_allchanges_rss'); |
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return $rss->outputToBrowser(); |
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} |
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/** |
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* Generates and embeds the RSS header link for the page-specific version rss feed |
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*/ |
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public function linkToPageRSSFeed() |
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{ |
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if (!Config::inst()->get(VersionFeed::class, 'changes_enabled') || !$this->owner->PublicHistory) { |
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return; |
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} |
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RSSFeed::linkToFeed( |
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$this->owner->Link('changes'), |
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sprintf( |
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_t('RSSHistory.SINGLEPAGEFEEDTITLE', 'Updates to %s page'), |
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$this->owner->Title |
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) |
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); |
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} |
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/** |
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* Generates and embeds the RSS header link for the global version rss feed |
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*/ |
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public function linkToAllSiteRSSFeed() |
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{ |
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if (!Config::inst()->get(VersionFeed::class, 'allchanges_enabled') |
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|| !SiteConfig::current_site_config()->AllChangesEnabled |
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) { |
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return; |
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} |
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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" type="application/rss+xml" title="' . $title . |
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'" href="' . $url . '" />' |
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); |
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} |
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public function linkToAllSitesRSSFeedTitle() |
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{ |
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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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silverstripe /
silverstripe-versionfeed
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