BP_REST_Group_Membership_Endpoint::delete_item_permissions_check( WP_REST_Request $request )

	public function delete_item_permissions_check( $request ) {
		$retval = true;

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

		$user = bp_rest_get_user( $request['user_id'] );

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

		$group = $this->groups_endpoint->get_group_object( $request['group_id'] );
		if ( true === $retval && ! $group instanceof BP_Groups_Group ) {
			$retval = new WP_Error(
				'bp_rest_group_invalid_id',
				__( 'Invalid group ID.', 'buddyboss' ),
				array(
					'status' => 404,
				)
			);
		}

		// Site administrators can do anything.
		if ( true === $retval && bp_current_user_can( 'bp_moderate' ) ) {
			$retval = true;
		} elseif ( true === $retval ) {

			$loggedin_user_id = bp_loggedin_user_id();

			if ( $user->ID !== $loggedin_user_id ) {
				if ( true === $retval && ! groups_is_user_admin( $loggedin_user_id, $group->id ) && ! groups_is_user_mod( $loggedin_user_id, $group->id ) ) {
					$retval = new WP_Error(
						'bp_rest_authorization_required',
						__( 'Sorry, you need to be logged in to view a group membership.', 'buddyboss' ),
						array(
							'status' => rest_authorization_required_code(),
						)
					);
				}
			} else {
				// Special case for self-removal: don't allow if it'd leave a group with no admins.
				$user             = bp_rest_get_user( $request['user_id'] );
				$group            = $this->groups_endpoint->get_group_object( $request['group_id'] );
				$loggedin_user_id = bp_loggedin_user_id();

				$group_admins = groups_get_group_admins( $group->id );
				if ( true === $retval && 1 === count( $group_admins ) && $loggedin_user_id === $group_admins[0]->user_id && $user->ID === $loggedin_user_id ) {
					$retval = new WP_Error(
						'bp_rest_authorization_required',
						__( 'Sorry, you need to be logged in to view a group membership.', 'buddyboss' ),
						array(
							'status' => rest_authorization_required_code(),
						)
					);
				}
			}
		}

		/**
		 * Filter the group members `delete_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_members_delete_item_permissions_check', $retval, $request );
	}