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

@@ -11,4 +11,12 @@ pub fn subscribe(product_type: &str, subscriber: Json<Subscriber>) -> Result<Cre
         Ok(f) => Ok(Created::new("/").body(Json::from(f))),
         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)
+    };
 }
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