Ready to initiate OpenID login

moneymgr_backend/src/controllers/auth_controller.rs

@@ -0,0 +1,42 @@
+use crate::app_config::AppConfig;
+use crate::controllers::HttpResult;
+use crate::extractors::money_session::MoneySession;
+use actix_web::HttpResponse;
+use light_openid::primitives::OpenIDConfig;
+
+#[derive(serde::Serialize)]
+struct StartOIDCResponse {
+    url: String,
+}
+
+/// Start OIDC authentication
+pub async fn start_oidc(session: MoneySession) -> HttpResult {
+    let prov = AppConfig::get().openid_provider();
+
+    let conf = match OpenIDConfig::load_from_url(prov.configuration_url).await {
+        Ok(c) => c,
+        Err(e) => {
+            log::error!("Failed to fetch OpenID provider configuration! {e}");
+            return Ok(HttpResponse::InternalServerError()
+                .json("Failed to fetch OpenID provider configuration!"));
+        }
+    };
+
+    let state = match session.gen_oidc_state() {
+        Ok(s) => s,
+        Err(e) => {
+            log::error!("Failed to generate auth state! {e}");
+            return Ok(HttpResponse::InternalServerError().json("Failed to generate auth state!"));
+        }
+    };
+
+    Ok(HttpResponse::Ok().json(StartOIDCResponse {
+        url: conf.gen_authorization_url(
+            prov.client_id,
+            &state,
+            &AppConfig::get().oidc_redirect_url(),
+        ),
+    }))
+}
+
+// TODO : take from previous projects