medea 0.2.0

Medea media server
Documentation 
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//! Macro for generating transition.

/// Generates functions for transition between [`ToRoom`],
/// [`ToMember`] and [`ToEndpoint`] states of Medea references and handy getters
/// for data of this references.
///
/// Supposed that container for which you want to implement all this methods
/// is something like:
///
/// ```rust
/// pub struct SomeReference<T> {
///     state: T
/// }
/// ```
///
/// This is necessary so that you can write different implementations of
/// serializing and deserializing for references, but at the same time have some
/// standard API for working with them.
///
/// [`ToRoom`]: crate::api::control::refs::ToRoom
/// [`ToMember`]: crate::api::control::refs::ToMember
/// [`ToEndpoint`]: crate::api::control::refs::ToEndpoint
macro_rules! impls_for_stateful_refs {
    ($container:tt) => {
        impl $container<ToRoom> {
            #[doc = "Create new reference in [`ToRoom`] state."]
            #[must_use]
            pub fn new(room_id: $crate::api::control::RoomId) -> Self {
                Self {
                    state: ToRoom(room_id),
                }
            }

            /// Returns borrowed [`RoomId`].
            ///
            /// [`RoomId`]: medea_client_api_proto::RoomId
            #[must_use]
            pub fn room_id(&self) -> &$crate::api::control::RoomId {
                &self.state.0
            }

            /// Returns [`RoomId`].
            ///
            /// [`RoomId`]: medea_client_api_proto::RoomId
            #[must_use]
            pub fn take_room_id(self) -> $crate::api::control::RoomId {
                self.state.0
            }

            /// Pushes [`MemberId`] to the end of URI and returns
            /// reference in [`ToMember`] state.
            ///
            /// [`MemberId`]: medea_client_api_proto::MemberId
            /// [`ToMember`]: crate::api::control::refs::ToMember
            #[must_use]
            pub fn push_member_id(
                self,
                member_id: $crate::api::control::MemberId,
            ) -> $container<ToMember> {
                $container::<$crate::api::control::refs::ToMember>::new(
                    self.state.0,
                    member_id,
                )
            }
        }

        impl $container<$crate::api::control::refs::ToMember> {
            /// Create new reference in [`ToMember`] state.
            ///
            /// [`ToMember`]: crate::api::control::refs::ToMember
            #[must_use]
            pub fn new(
                room_id: $crate::api::control::RoomId,
                member_id: $crate::api::control::MemberId,
            ) -> Self {
                Self {
                    state: $crate::api::control::refs::ToMember(
                        room_id, member_id,
                    ),
                }
            }

            /// Returns borrowed [`RoomId`].
            ///
            /// [`RoomId`]: medea_client_api_proto::RoomId
            #[must_use]
            pub fn room_id(&self) -> &$crate::api::control::RoomId {
                &self.state.0
            }

            /// Returns borrowed [`MemberId`].
            ///
            /// [`MemberId`]: medea_client_api_proto::MemberId
            #[must_use]
            pub fn member_id(&self) -> &$crate::api::control::MemberId {
                &self.state.1
            }

            /// Return [`MemberId`] and reference in state [`ToRoom`].
            ///
            /// [`MemberId`]: medea_client_api_proto::MemberId
            /// [`ToRoom`]: crate::api::control::refs::ToRoom
            #[must_use]
            pub fn take_member_id(
                self,
            ) -> (
                $crate::api::control::MemberId,
                $container<$crate::api::control::refs::ToRoom>,
            ) {
                (
                    self.state.1,
                    $container::<$crate::api::control::refs::ToRoom>::new(
                        self.state.0,
                    ),
                )
            }

            /// Push endpoint ID to the end of URI and returns
            /// reference in [`ToEndpoint`] state.
            ///
            /// [`ToEndpoint`]: crate::api::control::refs::ToEndpoint
            #[must_use]
            pub fn push_endpoint_id(
                self,
                endpoint_id: $crate::api::control::EndpointId,
            ) -> $container<$crate::api::control::refs::ToEndpoint> {
                let (member_id, room_uri) = self.take_member_id();
                let room_id = room_uri.take_room_id();
                $container::<$crate::api::control::refs::ToEndpoint>::new(
                    room_id,
                    member_id,
                    endpoint_id,
                )
            }

            /// Returns [`RoomId`] and [`MemberId`].
            ///
            /// [`RoomId`]: medea_client_api_proto::RoomId
            /// [`MemberId`]: medea_client_api_proto::MemberId
            #[must_use]
            pub fn take_all(
                self,
            ) -> ($crate::api::control::RoomId, $crate::api::control::MemberId)
            {
                let (member_id, room_url) = self.take_member_id();

                (room_url.take_room_id(), member_id)
            }
        }

        impl $container<$crate::api::control::refs::ToEndpoint> {
            /// Creates new reference in [`ToEndpoint`] state.
            ///
            /// [`ToEndpoint`]: crate::api::control::refs::ToEndpoint
            #[must_use]
            pub fn new(
                room_id: $crate::api::control::RoomId,
                member_id: $crate::api::control::MemberId,
                endpoint_id: $crate::api::control::EndpointId,
            ) -> Self {
                Self {
                    state: $crate::api::control::refs::ToEndpoint(
                        room_id,
                        member_id,
                        endpoint_id,
                    ),
                }
            }

            /// Returns borrowed [`RoomId`].
            ///
            /// [`RoomId`]: medea_client_api_proto::RoomId
            #[inline]
            #[must_use]
            pub fn room_id(&self) -> &$crate::api::control::RoomId {
                &self.state.0
            }

            /// Returns borrowed [`MemberId`].
            ///
            /// [`MemberId`]: medea_client_api_proto::MemberId
            #[inline]
            #[must_use]
            pub fn member_id(&self) -> &$crate::api::control::MemberId {
                &self.state.1
            }

            /// Returns borrowed [`EndpointId`].
            ///
            /// [`EndpointId`]: crate::api::control::EndpointId
            #[inline]
            #[must_use]
            pub fn endpoint_id(&self) -> &$crate::api::control::EndpointId {
                &self.state.2
            }

            /// Returns [`Endpoint`] id and reference in [`ToMember`] state.
            ///
            /// [`Endpoint`]: crate::signalling::elements::endpoints::Endpoint
            /// [`ToMember`]: crate::api::control::refs::ToMember
            #[must_use]
            pub fn take_endpoint_id(
                self,
            ) -> (
                $crate::api::control::EndpointId,
                $container<$crate::api::control::refs::ToMember>,
            ) {
                (
                    self.state.2,
                    $container::<$crate::api::control::refs::ToMember>::new(
                        self.state.0,
                        self.state.1,
                    ),
                )
            }

            /// Returns [`EndpointId`], [`RoomId`] and [`MemberId`].
            ///
            /// [`EndpointId`]: crate::api::control::EndpointId
            /// [`RoomId`]: medea_client_api_proto::RoomId
            /// [`MemberId`]: medea_client_api_proto::MemberId
            #[must_use]
            pub fn take_all(
                self,
            ) -> (
                $crate::api::control::RoomId,
                $crate::api::control::MemberId,
                $crate::api::control::EndpointId,
            ) {
                let (endpoint_id, member_url) = self.take_endpoint_id();
                let (member_id, room_url) = member_url.take_member_id();

                (room_url.take_room_id(), member_id, endpoint_id)
            }
        }
    };
}