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//! `GET /_matrix/identity/*/terms`
//!
//! Get the terms of service of an identity server.

pub mod v2 {
    //! `/v2/` ([spec])
    //!
    //! [spec]: https://spec.matrix.org/latest/identity-service-api/#get_matrixidentityv2terms

    use std::collections::BTreeMap;

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

    const METADATA: Metadata = metadata! {
        method: GET,
        rate_limited: false,
        authentication: None,
        history: {
            1.0 => "/_matrix/identity/v2/terms",
        }
    };

    /// Request type for the `get_terms_of_service` endpoint.
    #[request]
    #[derive(Default)]
    pub struct Request {}

    /// Response type for the `get_terms_of_service` endpoint.
    #[response]
    pub struct Response {
        /// The policies the server offers.
        ///
        /// Mapped from arbitrary ID (unused in this version of the specification) to a Policy
        /// Object.
        pub policies: BTreeMap<String, Policies>,
    }

    impl Request {
        /// Creates an empty `Request`.
        pub fn new() -> Self {
            Self {}
        }
    }

    impl Response {
        /// Creates a new `Response` with the given `Policies`.
        pub fn new(policies: BTreeMap<String, Policies>) -> Self {
            Self { policies }
        }
    }

    /// Collection of localized policies.
    #[derive(Clone, Debug, Serialize, Deserialize)]
    #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
    pub struct Policies {
        /// The version for the policy.
        ///
        /// There are no requirements on what this might be and could be
        /// "alpha", semantically versioned, or arbitrary.
        pub version: String,

        /// Available languages for the policy.
        ///
        /// The keys could be the language code corresponding to
        /// the given `LocalizedPolicy`, for example "en" or "fr".
        #[serde(flatten)]
        pub localized: BTreeMap<String, LocalizedPolicy>,
    }

    impl Policies {
        /// Create a new `Policies` with the given version and localized map.
        pub fn new(version: String, localized: BTreeMap<String, LocalizedPolicy>) -> Self {
            Self { version, localized }
        }
    }

    /// A localized policy offered by a server.
    #[derive(Clone, Debug, Serialize, Deserialize)]
    #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
    pub struct LocalizedPolicy {
        /// The localized name of the policy.
        ///
        /// Examples are "Terms of Service", "Conditions d'utilisation".
        pub name: String,

        /// The URL at which the policy is available.
        ///
        /// Examples are `https://example.org/somewhere/terms-2.0-en.html`
        /// and `https://example.org/somewhere/terms-2.0-fr.html`.
        pub url: String,
    }

    impl LocalizedPolicy {
        /// Create a new `LocalizedPolicy` with the given name and url.
        pub fn new(name: String, url: String) -> Self {
            Self { name, url }
        }
    }
}