Implement subscribe function in Notification controller.

src/controller/mod.rs

@@ -15,6 +15,6 @@ pub fn route_stage() -> AdHoc {
                     product::delete
                 ],
             )
-            .mount("/notification", routes![])
+            .mount("/notification", routes![notification::subscribe])
     });
 }

src/controller/notification.rs

@@ -4,3 +4,14 @@ use rocket::serde::json::Json;
 use crate::model::subscriber::Subscriber;
 use crate::service::notification::NotificationService;
 use bambangshop::Result;
+
+#[post("/subscribe/<product_type>", data = "<subscriber>")]
+pub fn subscribe(
+    product_type: &str,
+    subscriber: Json<Subscriber>,
+) -> Result<Created<Json<Subscriber>>> {
+    return match NotificationService::subscribe(product_type, subscriber.into_inner()) {
+        Ok(f) => Ok(Created::new("/").body(Json::from(f))),
+        Err(e) => Err(e),
+    };
+}