Add convertkit_output_restrict_content_content_preview and `convert…

…kit_output_restrict_content_call_to_action` filters

includes/class-convertkit-output-restrict-content.php

@@ -834,7 +834,36 @@ private function restrict_content( $content ) {
 			return $content;
 		}
 
-		return $this->get_content_preview( $content ) . $this->get_call_to_action( $this->post_id );
+		// Fetch the content preview.
+		$content_preview = $this->get_content_preview( $content );
+
+		/**
+		 * Define the output for the content preview when the visitor is not
+		 * an authenticated subscriber.
+		 * 
+		 * @since 	2.4.1
+		 * 
+		 * @param 	string 	$content_preview 	Content preview.
+		 * @param 	int 	$post_id 			Post ID.
+		 */
+		$content_preview = apply_filters( 'convertkit_output_restrict_content_content_preview', $content_preview, $this->post_id );
+
+		// Fetch the call to action.
+		$call_to_action = $this->get_call_to_action( $this->post_id );
+
+		/**
+		 * Define the output for the call to action, displayed below the content preview,
+		 * when the visitor is not an authenticated subscriber.
+		 * 
+		 * @since 	2.4.1
+		 * 
+		 * @param 	string 	$call_to_action 	Call to Action.
+		 * @param 	int 	$post_id 			Post ID.
+		 */
+		$call_to_action = apply_filters( 'convertkit_output_restrict_content_call_to_action', $call_to_action, $this->post_id );
+
+		// Return the content preview and its call to action.
+		return $content_preview . $call_to_action;
 
 	}