BP_REST_Members_Actions_Endpoint::update_item( WP_REST_Request $request )

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

		$args = array(
			'leader_id'   => (int) $request['id'],
			'follower_id' => get_current_user_id(),
		);

		$response           = array();
		$retval             = array();
		$response['action'] = false;

		/**
		 * Filter the query arguments for the request.
		 *
		 * @param array $args Key value array of query var to query value.
		 * @param WP_REST_Request $request The request sent to the API.
		 *
		 * @since 0.1.0
		 */
		$args = apply_filters( 'bp_rest_members_action_query_args', $args, $request );

		$action = $request['action'];

		switch ( $action ) {
			case 'follow':
				if ( ! $this->bp_rest_follow_is_following( $args ) ) {
					$result             = $this->bp_rest_follow_start_following( $args );
					$response['action'] = ( ! empty( $result ) ? true : false );
				}
				break;
			case 'unfollow':
				if ( $this->bp_rest_follow_is_following( $args ) ) {
					$result             = $this->bp_rest_follow_stop_following( $args );
					$response['action'] = ( ! empty( $result ) ? true : false );
				}
				break;
		}

		$member_query = bp_core_get_users( array( 'include' => (int) $request['id'] ) );
		$members      = $member_query['users'];

		$request->set_param( 'context', 'view' );

		foreach ( $members as $member ) {
			$retval[] = $this->prepare_response_for_collection(
				$this->members_endpoint->prepare_item_for_response( $member, $request )
			);
		}

		$response['data'] = ( count( $members ) > 1 ? $retval : ( ! empty( $retval ) ? $retval[0] : '' ) );

		$response = rest_ensure_response( $response );

		/**
		 * Fires after a Member action is updated via the REST API.
		 *
		 * @param BP_XProfile_Field $field Created field object.
		 * @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_members_action_update_item', $response, $request );

		return $response;

	}