API Ability to globally enable / disable RSS feeds via config / siteconfig

_config/versionfeed.yml

@@ -10,6 +10,9 @@ Injector:
 SiteTree:
   extensions:
     - VersionFeed
+SiteConfig:
+  extensions:
+    - VersionFeedSiteConfig
 ContentController:
   extensions:
     - VersionFeed_Controller

code/VersionFeed.php

@@ -13,6 +13,22 @@ class VersionFeed extends SiteTreeExtension {
 	public function updateFieldLabels(&$labels) {
 		$labels['PublicHistory'] = _t('RSSHistory.LABEL', 'Make history public');
 	}
+	
+	/**
+	 * Enable the allchanges feed
+	 *
+	 * @config
+	 * @var bool
+	 */
+	private static $allchanges_enabled = true;
+	
+	/**
+	 * Enables RSS feed for page-specific changes
+	 * 
+	 * @config
+	 * @var bool
+	 */
+	private static $changes_enabled = true;
 
 	/**
 	 * Compile a list of changes to the current page, excluding non-published and explicitly secured versions.
@@ -84,6 +100,8 @@ class VersionFeed extends SiteTreeExtension {
 	}
 
 	public function updateSettingsFields(FieldList $fields) {
+		if(!Config::inst()->get(get_class(), 'changes_enabled')) return;
+		
 		// Add public history field.
 		$fields->addFieldToTab('Root.Settings', $publicHistory = new FieldGroup(
 			new CheckboxField('PublicHistory', $this->owner->fieldLabel('PublicHistory')
@@ -111,10 +129,16 @@ class VersionFeed extends SiteTreeExtension {
 
 	public function getSiteRSSLink() {
 		// TODO: This link should be from the homepage, not this page.
-		return $this->owner->Link('allchanges');
+		if(Config::inst()->get(get_class(), 'allchanges_enabled')
+			&& SiteConfig::current_site_config()->AllChangesEnabled
+		) {
+			return $this->owner->Link('allchanges');
+		}
 	}
 
 	public function getDefaultRSSLink() {
-		if ($this->owner->PublicHistory) return $this->owner->Link('changes');
+		if(Config::inst()->get(get_class(), 'changes_enabled') && $this->owner->PublicHistory) {
+			return $this->owner->Link('changes');
+		}
 	}
 }

code/VersionFeedSiteConfig.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * Allows global configuration of all changes
+ */
+class VersionFeedSiteConfig extends DataExtension {
+	
+	private static $db = array(
+		'AllChangesEnabled' => 'Boolean(true)'
+	);
+
+	private static $defaults = array(
+		'AllChangesEnabled' => true
+	);
+
+	public function updateFieldLabels(&$labels) {
+		$labels['AllChangesEnabled'] = _t('VersionFeedSiteConfig.ALLCHANGESLABEL', 'Make global changes feed public');
+	}
+	
+	public function updateCMSFields(\FieldList $fields) {
+		if(!Config::inst()->get('VersionFeed', 'allchanges_enabled')) return;
+
+		$fields->addFieldToTab('Root.Access',
+			FieldGroup::create(new CheckboxField('AllChangesEnabled', $this->owner->fieldLabel('AllChangesEnabled')))
+				->setTitle(_t('VersionFeedSiteConfig.ALLCHANGES', 'All page changes'))
+				->setDescription(_t(
+					'VersionFeed.Warning',
+					"Publicising the history will also disclose the changes that have at the time been protected " .
+					"from the public view."
+				))
+		);
+	}
+}

code/VersionFeed_Controller.php

@@ -39,26 +39,18 @@ class VersionFeed_Controller extends Extension {
 	}
 
 	public function onAfterInit() {
-		// RSS feed for per-page changes.
-		if ($this->owner->PublicHistory) {
-			RSSFeed::linkToFeed($this->owner->Link() . 'changes', 
-				sprintf(
-					_t('RSSHistory.SINGLEPAGEFEEDTITLE', 'Updates to %s page'),
-					$this->owner->Title
-				)
-			);
-		}
-
+		$this->linkToPageRSSFeed();
 		$this->linkToAllSiteRSSFeed();
-
-		return $this;
 	}
 
 	/**
 	 * Get page-specific changes in a RSS feed.
 	 */
 	public function changes() {
-		if(!$this->owner->PublicHistory) throw new SS_HTTPResponse_Exception('Page history not viewable', 404);
+		// Check viewability of changes
+		if(!Config::inst()->get('VersionFeed', 'changes_enabled') || !$this->owner->PublicHistory) {
+			return $this->owner->httpError(404, 'Page history not viewable');
+		}
 
 		// Cache the diffs to remove DOS possibility.
 		$target = $this->owner;
@@ -78,6 +70,12 @@ class VersionFeed_Controller extends Extension {
 	 * Get all changes from the site in a RSS feed.
 	 */
 	public function allchanges() {
+		// Check viewability of allchanges
+		if(!Config::inst()->get('VersionFeed', 'allchanges_enabled')
+			|| !SiteConfig::current_site_config()->AllChangesEnabled
+		) {
+			return $this->owner->httpError(404, 'Global history not viewable');
+		}
 
 		$latestChanges = DB::query('
 			SELECT * FROM "SiteTree_versions"
@@ -127,8 +125,34 @@ class VersionFeed_Controller extends Extension {
 		$rss->setTemplate('Page_allchanges_rss');
 		return $rss->outputToBrowser();
 	}
+	
+	/**
+	 * Generates and embeds the RSS header link for the page-specific version rss feed
+	 */
+	public function linkToPageRSSFeed() {
+		if (!Config::inst()->get('VersionFeed', 'changes_enabled') || !$this->owner->PublicHistory) {
+			return;
+		}
+		
+		RSSFeed::linkToFeed(
+			$this->owner->Link('changes'),
+			sprintf(
+				_t('RSSHistory.SINGLEPAGEFEEDTITLE', 'Updates to %s page'),
+				$this->owner->Title
+			)
+		);
+	}
 
-	function linkToAllSiteRSSFeed() {
+	/**
+	 * Generates and embeds the RSS header link for the global version rss feed
+	 */
+	public function linkToAllSiteRSSFeed() {
+		if(!Config::inst()->get('VersionFeed', 'allchanges_enabled')
+			|| !SiteConfig::current_site_config()->AllChangesEnabled
+		) {
+			return;
+		}
+		
 		// RSS feed to all-site changes.
 		$title = Convert::raw2xml($this->linkToAllSitesRSSFeedTitle());
 		$url = $this->owner->getSiteRSSLink();
@@ -138,7 +162,7 @@ class VersionFeed_Controller extends Extension {
 			'" href="' . $url . '" />');
 	}
 
-	function linkToAllSitesRSSFeedTitle() {
+	public function linkToAllSitesRSSFeedTitle() {
 		return sprintf(_t('RSSHistory.SITEFEEDTITLE', 'Updates to %s'), SiteConfig::current_site_config()->Title);
 	}
 }

docs/en/developer.md

@@ -7,6 +7,15 @@
 Creating functions called `changes` or `allchanges` on any of your page types or controllers will cause confusion with
 the extensions defined on the extension.
 
+### Enabling / Disabling
+
+The `allchanges` feed can be disabled by setting the `VersionFeed.allchanges_enabled` config to false.
+
+Likewise, the `changes` feed for each page can be globally disabled by setting the `VersionFeed.changes_enabled`
+config to false. If this left true, then each page can still be individually disabled by unchecking the
+'Make History Public' checkbox in the CMS under page settings.
+See [user documentation on enabling / disabling](user.md#enabling--disabling).
+
 ### Default RSS action
 
 Templates can offer a "Subscribe" link with a link to the most relevant RSS feed. This will default to the changes feed

docs/en/user.md

@@ -17,6 +17,9 @@ You can enable or disable the feed on a per-page basis by checking or unchecking
 Settings tab of each page. If a page has the Public History option, unchecked, it will not appear in the allchanges
 feed.
 
+The allchanges feed can also be disabled by unchecking the "All page changes" checkbox in the "Settings"
+section in the cms.
+
 #### Privacy
 
 A page's history will be completely visible when it has public history enabled, even if some updates were made when it

lang/en.yml

@@ -7,3 +7,6 @@ en:
   VersionFeed:
     Warning: 'Publicising the history will also disclose the changes that have at the time been protected from the public view.'
     Warning2: 'Changing access settings in such a way that this page or pages under it become publicly<br>accessible may result in publicising all historical changes on these pages too. Please review<br>this section''s "Public history" settings to ascertain only intended information is disclosed.'
+  VersionFeedSiteConfig:
+    ALLCHANGES: 'All page changes'
+    ALLCHANGESLABEL: 'Make global changes feed public'

tests/VersionFeedFunctionalTest.php

@@ -178,5 +178,38 @@ class VersionFeedFunctionalTest extends FunctionalTest {
 
 		return $page;
 	}
+	
+	/**
+	 * Tests response code for globally disabled feedss
+	 */
+	public function testFeedViewability() {
+		$siteConfig = SiteConfig::current_site_config();
+		
+		// Nested loop through each configuration
+		foreach(array(true, false) as $publicHistory_Page) {
+			$page = $this->createPageWithChanges(array('PublicHistory' => $publicHistory_Page, 'Title' => 'Page'));
+			
+			// Test requests to 'changes' action
+			foreach(array(true, false) as $publicHistory_Config) {
+				Config::inst()->update('VersionFeed', 'changes_enabled', $publicHistory_Config);
+				$expectedResponse = $publicHistory_Page && $publicHistory_Config ? 200 : 404;
+				$response = $this->get($page->RelativeLink('changes'));
+				$this->assertEquals($expectedResponse, $response->getStatusCode());
+			}
+			
+			// Test requests to 'allchanges' action on each page
+			foreach(array(true, false) as $allChanges_Config) {
+				foreach(array(true, false) as $allChanges_SiteConfig) {
+					Config::inst()->update('VersionFeed', 'allchanges_enabled', $allChanges_Config);
+					$siteConfig->AllChangesEnabled = $allChanges_SiteConfig;
+					$siteConfig->write();
+					
+					$expectedResponse = $allChanges_Config && $allChanges_SiteConfig ? 200 : 404;
+					$response = $this->get($page->RelativeLink('allchanges'));
+					$this->assertEquals($expectedResponse, $response->getStatusCode());
+				}
+			}
+		}
+	}
 
-}
+}