Allow identifying whether the current item is the filtered one

lib/private/activitymanager.php

@@ -44,6 +44,12 @@ class ActivityManager implements IManager {
 	/** @var IConfig */
 	protected $config;
 
+	/** @var string */
+	protected $formattingObjectType;
+
+	/** @var int */
+	protected $formattingObjectId;
+
 	/**
 	 * constructor of the controller
 	 *
@@ -303,6 +309,24 @@ class ActivityManager implements IManager {
 		return '';
 	}
 
+	/**
+	 * @param string $type
+	 * @param int $id
+	 */
+	public function setFormattingObject($type, $id) {
+		$this->formattingObjectType = $type;
+		$this->formattingObjectId = $id;
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function isFormattingFilteredObject() {
+		return 'filter' === $this->request->getParam('filter')
+			&& $this->formattingObjectType === $this->request->getParam('objecttype')
+			&& $this->formattingObjectId === $this->request->getParam('objectid');
+	}
+
 	/**
 	 * @param string $app
 	 * @param string $text

lib/public/activity/imanager.php

@@ -137,6 +137,19 @@ interface IManager {
 	 */
 	public function getTypeIcon($type);
 
+	/**
+	 * @param string $type
+	 * @param int $id
+	 * @since 8.2.0
+	 */
+	public function setFormattingObject($type, $id);
+
+	/**
+	 * @return bool
+	 * @since 8.2.0
+	 */
+	public function isFormattingFilteredObject();
+
 	/**
 	 * @param string $app
 	 * @param string $text