feat: [torrust#445] new user id extractor

Author: mario-nt

src/web/api/v1/extractors/mod.rs

@@ -1 +1,2 @@
 pub mod bearer_token;
+pub mod user_id;

src/web/api/v1/extractors/user_id.rs

@@ -0,0 +1,37 @@
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use axum::extract::{FromRef, FromRequestParts};
+use axum::http::request::Parts;
+use axum::response::{IntoResponse, Response};
+
+use super::bearer_token;
+use crate::common::AppData;
+use crate::errors::ServiceError;
+use crate::models::user::UserId;
+
+pub struct ExtractLoggedInUser(pub UserId);
+
+#[async_trait]
+impl<S> FromRequestParts<S> for ExtractLoggedInUser
+where
+    Arc<AppData>: FromRef<S>,
+    S: Send + Sync,
+{
+    type Rejection = Response;
+
+    async fn from_request_parts(parts: &mut Parts, state: &S) -> Result<Self, Self::Rejection> {
+        let maybe_bearer_token = match bearer_token::Extract::from_request_parts(parts, state).await {
+            Ok(maybe_bearer_token) => maybe_bearer_token.0,
+            Err(_) => return Err(ServiceError::Unauthorized.into_response()),
+        };
+
+        //Extracts the app state
+        let app_data = Arc::from_ref(state);
+
+        match app_data.auth.get_user_id_from_bearer_token(&maybe_bearer_token).await {
+            Ok(user_id) => Ok(ExtractLoggedInUser(user_id)),
+            Err(error) => Err(error.into_response()),
+        }
+    }
+}