Implement unsubscribe function in Notification controller.

src/controller/mod.rs

@@ -7,6 +7,6 @@ pub fn route_stage() -> AdHoc {
     return AdHoc::on_ignite("Initializing controller routes...", |rocket| async {
         rocket
             .mount("/product", routes![product::create, product::list, product::read, product::delete])
-            .mount("notification", routes![notification::subscribe])
+            .mount("notification", routes![notification::subscribe, notification::unsubscribe])
     });
 }

src/controller/notification.rs

 use rocket::response::status::Created;
-use rocket::serde::json::Json;
+use rocket::serde::json::{self, Json};
 
 use bambangshop::Result;
 use crate::model::subscriber::{self, Subscriber};
@@ -12,3 +12,11 @@ pub fn subscribe(product_type: &str, subscriber: Json<Subscriber>) -> Result<Cre
         Err(e) => Err(e)
     }
 }
+
+#[post("/unsubscribe/<product_type>?<url>")]
+pub fn unsubscribe(product_type: &str, url: &str) -> Result<Json<Subscriber>> {
+    return match NotificationService::unsubscribe(product_type, url) {
+        Ok(f) => Ok(Json::from(f)),
+        Err(e) => Err(e)
+    }
+}