feat: prepare email client usage

src/routes/subscriptions.rs

@@ -1,5 +1,7 @@
 use crate::domain::SubscriberEmail;
 use crate::domain::{NewSubscriber, SubscriberName};
+use crate::email_client;
+use crate::startup::AppState;
 use axum::extract::State;
 use axum::routing::post;
 use axum::Form;
@@ -31,21 +33,27 @@ impl TryFrom<FormData> for NewSubscriber {
 
 #[tracing::instrument(
     name = "Adding a new subscriber",
-    skip(form, pool),
+    skip(form, db_pool, email_client),
     fields(
         request_id = %Uuid::new_v4(),
         subscriber_email = %form.email,
         subscriber_name = %form.name
     )
 )]
-pub async fn subscribe(State(pool): State<PgPool>, Form(form): Form<FormData>) -> Response {
+pub async fn subscribe(
+    State(AppState {
+        db_pool,
+        email_client,
+    }): State<AppState>,
+    Form(form): Form<FormData>,
+) -> Response {
     let new_subscriber = match form.try_into() {
         Ok(form) => form,
         Err(_) => {
             return (StatusCode::BAD_REQUEST, "Invalid subscription.").into_response();
         }
     };
-    match insert_subscriber(&pool, &new_subscriber).await {
+    match insert_subscriber(&db_pool, &new_subscriber).await {
         Ok(_) => {
             return (StatusCode::OK,).into_response();
         }
@@ -57,10 +65,10 @@ pub async fn subscribe(State(pool): State<PgPool>, Form(form): Form<FormData>) -
 
 #[tracing::instrument(
     name = "Saving new subscriber details in the database",
-    skip(new_subscriber, pool)
+    skip(new_subscriber, db_pool)
 )]
 pub async fn insert_subscriber(
-    pool: &PgPool,
+    db_pool: &PgPool,
     new_subscriber: &NewSubscriber,
 ) -> Result<(), sqlx::Error> {
     let _ = sqlx::query!(
@@ -75,7 +83,7 @@ pub async fn insert_subscriber(
     )
     // We use `get_ref` to get an immutable reference to the `PgConnection`
     // wrapped by `web::Data`.
-    .execute(pool)
+    .execute(db_pool)
     .await
     .map_err(|e| {
         tracing::error!("Failed to execute query: {:?}", e);
@@ -84,8 +92,8 @@ pub async fn insert_subscriber(
     Ok(())
 }
 
-pub fn routes_subscriptions(pool: PgPool) -> Router {
+pub fn routes_subscriptions(state: AppState) -> Router {
     Router::new()
         .route("/subscriptions", post(subscribe))
-        .with_state(pool)
+        .with_state(state)
 }