identity-service-api: Add terms of service retrieval endpoint

ruma-identity-service-api/src/lib.rs

@@ -1,3 +1,4 @@
 pub mod authentication;
 pub mod keys;
 pub mod status;
+pub mod tos;

ruma-identity-service-api/src/tos.rs

@@ -0,0 +1,3 @@
+//! Endpoints to retreive and accept terms of service of an identity server.
+
+pub mod get_terms_of_service;

ruma-identity-service-api/src/tos/get_terms_of_service.rs

@@ -0,0 +1,3 @@
+//! Endpoint to retrieve the terms of service of an identity server.
+
+pub mod v2;

ruma-identity-service-api/src/tos/get_terms_of_service/v2.rs

@@ -0,0 +1,73 @@
+//! [GET /_matrix/identity/v2/terms](https://matrix.org/docs/spec/identity_service/r0.3.0#get-matrix-identity-v2-terms)
+
+use std::collections::BTreeMap;
+
+use ruma_api::ruma_api;
+use serde::{Deserialize, Serialize};
+
+ruma_api! {
+        metadata: {
+            description: "Gets all the terms of service offered by the server.",
+            method: GET,
+            name: "get_terms_of_service",
+            path: "/_matrix/identity/v2/terms",
+            authentication: None,
+            rate_limited: false,
+        }
+
+        #[derive(Default)]
+        request: {}
+
+        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)]
+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>,
+}
+
+/// A localized policy offered by a server.
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct LocalizedPolicy {
+    /// The localized name of the policy.
+    ///
+    /// Examples are "Terms of Service", "Conditions d'utilisation".
+    pub name: String,
+
+    /// The URL at wich 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,
+}