Allow media upload without text from group activity

app/main/RTMedia.php

@@ -1050,8 +1050,9 @@ public function init() {
 
 		$this->set_allowed_types(); // Define allowed types.
 
-		global $rtmedia_buddypress_activity;
+		global $rtmedia_buddypress_activity, $rtmedia_buddypress_group_activity;
 		$rtmedia_buddypress_activity = new RTMediaBuddyPressActivity();
+		$rtmedia_buddypress_group_activity = new RTMediaBuddyPressGroupActivity();
 		$media                       = new RTMediaMedia();
 		$media->delete_hook();
 

app/main/controllers/group/RTMediaBuddyPressGroupActivity.php

@@ -0,0 +1,43 @@
+<?php
+/**
+ * Handle/change BuddyPress group activities behaviour.
+ *
+ * @package rtMedia
+ */
+
+/**
+ * Class to handle/change BuddyPress group activities behaviour.
+ *
+ * @author utsavladani
+ */
+class RTMediaBuddyPressGroupActivity {
+
+	/**
+	 * RTMediaBuddyPressGroupActivity constructor.
+	 */
+	public function __construct() {
+		// Allow only media uploading without text in activity.
+		add_filter( 'bp_before_groups_post_update_parse_args', array( $this, 'bp_before_groups_post_update_parse_args' ) );
+	}
+
+	/**
+	 * Filter content before processing in group activity.
+	 * It adds the '&nbsp;' if content is empty, when we are only uploading media from activity.
+	 *
+	 * @param array $args Activity arguments.
+	 *
+	 * @return array
+	 */
+	public function bp_before_groups_post_update_parse_args( $args ) {
+		// if content is non-breaking space then set it to empty.
+		if ( isset( $args['content'] ) && '' === $args['content'] ) {
+
+			// Nonce verification is not required here as it is already done in previously.
+			if ( ! empty( $_POST['rtMedia_attached_files'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing
+				$args['content'] = '&nbsp;';
+			}
+		}
+
+		return $args;
+	}
+}