BP_REST_Group_Membership_Request_Endpoint::create_item_permissions_check( WP_REST_Request $request )

	public function create_item_permissions_check( $request ) {
		$retval      = true;
		$user_id     = bp_loggedin_user_id();
		$user_id_arg = $request['user_id'] ? $request['user_id'] : bp_loggedin_user_id();
		$user        = bp_rest_get_user( $user_id_arg );
		$group       = $this->groups_endpoint->get_group_object( $request['group_id'] );

		// User must be logged in.
		if ( ! is_user_logged_in() ) {
			$retval = new WP_Error(
				'bp_rest_authorization_required',
				__( 'Sorry, you need to be logged in to create a membership request.', 'buddyboss' ),
				array(
					'status' => rest_authorization_required_code(),
				)
			);
		}

		// Check for valid user.
		if ( true === $retval && ! $user instanceof WP_User ) {
			$retval = new WP_Error(
				'bp_rest_group_member_invalid_id',
				__( 'Invalid member ID.', 'buddyboss' ),
				array(
					'status' => 404,
				)
			);
		}

		// Check for valid group.
		if ( true === $retval && ! $group instanceof BP_Groups_Group ) {
			$retval = new WP_Error(
				'bp_rest_group_invalid_id',
				__( 'Invalid group ID.', 'buddyboss' ),
				array(
					'status' => 404,
				)
			);
		}

		// Normal users can only extend invitations on their own behalf.
		if (
			true === $retval
			&& ! bp_current_user_can( 'bp_moderate' )
			&& $user_id !== $user_id_arg
		) {
			$retval = new WP_Error(
				'bp_rest_group_membership_requests_cannot_create_item',
				__( 'User may not extend requests on behalf of another user.', 'buddyboss' ),
				array(
					'status' => 500,
				)
			);
		}

		/**
		 * Filter the group membership request `create_item` permissions check.
		 *
		 * @param bool|WP_Error $retval Returned value.
		 * @param WP_REST_Request $request The request sent to the API.
		 *
		 * @since 0.1.0
		 */
		return apply_filters( 'bp_rest_group_membership_requests_create_item_permissions_check', $retval, $request );
	}