Can get current user identity

src/server/api/account.rs

@@ -0,0 +1,23 @@
+use crate::extractors::client_auth::APIClientAuth;
+use crate::server::HttpResult;
+use actix_web::HttpResponse;
+use ruma::api::client::account;
+use ruma::DeviceId;
+
+#[derive(serde::Serialize)]
+struct WhoAmIResponse {
+    user_id: String,
+    device_id: Option<String>,
+}
+
+/// Get current user identity
+pub async fn who_am_i(auth: APIClientAuth) -> HttpResult {
+    let res = auth
+        .send_request(account::whoami::v3::Request::default())
+        .await?;
+
+    Ok(HttpResponse::Ok().json(WhoAmIResponse {
+        user_id: res.user_id.to_string(),
+        device_id: res.device_id.as_deref().map(DeviceId::to_string),
+    }))
+}

src/server/api/mod.rs

@@ -2,6 +2,8 @@ use crate::extractors::client_auth::APIClientAuth;
 use crate::server::HttpResult;
 use actix_web::HttpResponse;
 
+pub mod account;
+
 /// API Home route
 pub async fn api_home(auth: APIClientAuth) -> HttpResult {
     Ok(HttpResponse::Ok().body(format!("Welcome user {}!", auth.user.user_id.0)))

src/server/mod.rs

@@ -1,6 +1,7 @@
 use actix_web::http::StatusCode;
 use actix_web::{HttpResponse, ResponseError};
 use std::error::Error;
+use std::fmt::Debug;
 
 pub mod api;
 pub mod web_ui;
@@ -21,6 +22,10 @@ pub enum HttpFailure {
     FetchUserConfig(anyhow::Error),
     #[error("an unspecified internal error occurred: {0}")]
     InternalError(#[from] anyhow::Error),
+    #[error("a matrix api client error occurred: {0}")]
+    MatrixApiClientError(#[from] ruma::api::client::Error),
+    #[error("a matrix  client error occurred: {0}")]
+    MatrixClientError(String),
 }
 
 impl ResponseError for HttpFailure {
@@ -37,4 +42,4 @@ impl ResponseError for HttpFailure {
     }
 }
 
-pub type HttpResult = std::result::Result<HttpResponse, HttpFailure>;
+pub type HttpResult = Result<HttpResponse, HttpFailure>;