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//! `POST /_matrix/client/*/refresh`
//!
//! Refresh an access token.
//!
//! Clients should use the returned access token when making subsequent API
//! calls, and store the returned refresh token (if given) in order to refresh
//! the new access token when necessary.
//!
//! After an access token has been refreshed, a server can choose to invalidate
//! the old access token immediately, or can choose not to, for example if the
//! access token would expire soon anyways. Clients should not make any
//! assumptions about the old access token still being valid, and should use the
//! newly provided access token instead.
//!
//! The old refresh token remains valid until the new access token or refresh
//! token is used, at which point the old refresh token is revoked.
//!
//! Note that this endpoint does not require authentication via an access token.
//! Authentication is provided via the refresh token.
//!
//! Application Service identity assertion is disabled for this endpoint.

pub mod v3 {
    //! `/v3/` ([spec])
    //!
    //! [spec]: https://spec.matrix.org/latest/client-server-api/#post_matrixclientv3refresh

    use std::time::Duration;

    use ruma_common::{
        api::{request, response, Metadata},
        metadata,
    };

    const METADATA: Metadata = metadata! {
        method: POST,
        rate_limited: true,
        authentication: None,
        history: {
            unstable => "/_matrix/client/unstable/org.matrix.msc2918/refresh",
            1.3 => "/_matrix/client/v3/refresh",
        }
    };

    /// Request type for the `refresh` endpoint.
    #[request(error = crate::Error)]
    pub struct Request {
        /// The refresh token.
        pub refresh_token: String,
    }

    /// Response type for the `refresh` endpoint.
    #[response(error = crate::Error)]
    pub struct Response {
        /// The new access token to use.
        pub access_token: String,

        /// The new refresh token to use when the access token needs to be refreshed again.
        ///
        /// If this is `None`, the old refresh token can be re-used.
        #[serde(skip_serializing_if = "Option::is_none")]
        pub refresh_token: Option<String>,

        /// The lifetime of the access token, in milliseconds.
        ///
        /// If this is `None`, the client can assume that the access token will not expire.
        #[serde(
            with = "ruma_common::serde::duration::opt_ms",
            default,
            skip_serializing_if = "Option::is_none"
        )]
        pub expires_in_ms: Option<Duration>,
    }

    impl Request {
        /// Creates a new `Request` with the given refresh token.
        pub fn new(refresh_token: String) -> Self {
            Self { refresh_token }
        }
    }

    impl Response {
        /// Creates a new `Response` with the given access token.
        pub fn new(access_token: String) -> Self {
            Self { access_token, refresh_token: None, expires_in_ms: None }
        }
    }
}