Add generic query endpoint

ruma-federation-api/CHANGELOG.md

@@ -25,6 +25,7 @@ Improvements:
       create_leave_event::{v1, v2},
       get_leave_event::v1,
   },
+  query::get_custom_information::v1,
   thirdparty::{
       bind_callback::v1,
       exchange_invite::v1,

ruma-federation-api/src/query.rs

@@ -1,4 +1,5 @@
 //! Endpoints to retrieve information from a homeserver about a resource.
 
+pub mod get_custom_information;
 pub mod get_profile_information;
 pub mod get_room_information;

ruma-federation-api/src/query/get_custom_information.rs

@@ -0,0 +1,3 @@
+//! Generic query endpoint for performing custom queries.
+
+pub mod v1;

ruma-federation-api/src/query/get_custom_information/v1.rs

@@ -0,0 +1,47 @@
+//! [GET /_matrix/federation/v1/query/{queryType}](https://matrix.org/docs/spec/server_server/r0.1.4#get-matrix-federation-v1-query-querytype)
+
+use ruma_api::ruma_api;
+use serde_json::Value as JsonValue;
+
+use std::collections::BTreeMap;
+
+ruma_api! {
+    metadata: {
+        description: "Performs a single query request on the receiving homeserver. The query string arguments are dependent on which type of query is being made.",
+        method: GET,
+        name: "get_custom_information",
+        path: "/_matrix/federation/v1/query/:query_type",
+        rate_limited: false,
+        authentication: AccessToken,
+    }
+
+    request: {
+        /// The type of query to make.
+        #[ruma_api(path)]
+        pub query_type: &'a str,
+
+        /// The query parameters.
+        #[ruma_api(query_map)]
+        pub params: BTreeMap<String, String>,
+    }
+
+    response: {
+        /// The body of the response.
+        #[ruma_api(body)]
+        pub body: JsonValue,
+    }
+}
+
+impl<'a> Request<'a> {
+    /// Creates a new request with the given type and query parameters.
+    pub fn new(query_type: &'a str, params: BTreeMap<String, String>) -> Self {
+        Self { query_type, params }
+    }
+}
+
+impl Response {
+    /// Creates a new response with the given body.
+    pub fn new(body: JsonValue) -> Self {
+        Self { body }
+    }
+}