BP_REST_Group_Messages_Endpoint::bp_rest_groups_messages_validate_message( mixed $send, WP_REST_Request $request, string $type = 'all' )

	public function bp_rest_groups_messages_validate_message( $send, $request, $type = 'all' ) {
		if ( is_wp_error( $send ) ) {
			return new WP_Error(
				'bp_rest_unknown_error',
				$send->get_error_message(),
				array(
					'status' => rest_authorization_required_code(),
				)
			);
		} elseif ( ! empty( $send ) ) {
			$thread = new BP_Messages_Thread( (int) $send );

			$recipients_count = ( count( $thread->recipients ) > 1 ? count( $thread->recipients ) - ( isset( $request['user_id'] ) && ! empty( $request['user_id'] ) ? 1 : 0 ) : 0 );

			if ( 'individual' === $type ) {
				$retval['message'] = sprintf(
				/* translators: Message member count. */
					__( 'Your message was sent to %s members of this group.', 'buddyboss' ),
					$recipients_count
				);
			} else {
				$retval['message'] = __( 'Your message was sent to all members of this group.', 'buddyboss' );
			}

			$last_message  = wp_list_filter( $thread->messages, array( 'id' => $thread->last_message_id ) );
			$last_message  = reset( $last_message );
			$fields_update = $this->update_additional_fields_for_object( $last_message, $request );

			if ( is_wp_error( $fields_update ) ) {
				return $fields_update;
			}

			$retval['data'] = $this->prepare_response_for_collection(
				$this->message_endppoint->prepare_item_for_response( $thread, $request )
			);

			$response = rest_ensure_response( $retval );

			/**
			 * Fires after a thread is fetched via the REST API.
			 *
			 * @param BP_Messages_Box_Template $messages_box Fetched thread.
			 * @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_group_messages_create_items', $thread, $response, $request );

			return $response;
		}
	}