BP_REST_Messages_Endpoint::update_item( WP_REST_Request $request )

	public function update_item( $request ) {
		// Setting context.
		$request->set_param( 'context', 'edit' );

		// Get the thread.
		$thread = $this->get_thread_object( $request['id'] );
		$error  = new WP_Error(
			'bp_rest_messages_update_failed',
			__( 'There was an error trying to update the message.', 'buddyboss' ),
			array(
				'status' => 500,
			)
		);

		if ( ! $thread->thread_id ) {
			return $error;
		}

		// By default use the last message.
		$last_message = reset( $thread->messages );
		$message_id   = $last_message->id;
		if ( $request['message_id'] ) {
			$message_id = $request['message_id'];
		}

		$updated_message = wp_list_filter( $thread->messages, array( 'id' => $message_id ) );
		$updated_message = reset( $updated_message );

		/**
		 * Filter here to allow more users to edit the message meta (eg: the recipients).
		 *
		 * @param boolean             $value           Whether the user can edit the message meta.
		 *                                             By default: only the sender and a community moderator can.
		 * @param BP_Messages_Message $updated_message The updated message object.
		 * @param WP_REST_Request     $request         The request sent to the API.
		 *
		 * @since 0.1.0
		 */
		$can_edit_item_meta = apply_filters(
			'bp_rest_messages_can_edit_item_meta',
			bp_loggedin_user_id() === $updated_message->sender_id || bp_current_user_can( 'bp_moderate' ),
			$updated_message,
			$request
		);

		// The message must exist in the thread, and the logged in user must be the sender.
		if ( ! isset( $updated_message->id ) || ! $updated_message->id || ! $can_edit_item_meta ) {
			return $error;
		}

		$fields_update = $this->update_additional_fields_for_object( $updated_message, $request );
		if ( is_wp_error( $fields_update ) ) {
			return $fields_update;
		}

		$retval = $this->prepare_response_for_collection(
			$this->prepare_item_for_response( $thread, $request )
		);

		$response = rest_ensure_response( $retval );

		/**
		 * Fires after a message is updated via the REST API.
		 *
		 * @param BP_Messages_Message $updated_message The updated message.
		 * @param WP_REST_Response    $response        The response data.
		 * @param WP_REST_Request     $request         The request sent to the API.
		 *
		 * @since 0.1.0
		 */
		do_action( 'bp_rest_messages_update_item', $updated_message, $response, $request );

		return $response;
	}