Refactor tags services and added tests

Implemented some functionality which will allow the service
configuration of the app to be split among the features for readability
and testability.

src/main.rs

@@ -36,6 +36,7 @@ use crate::auth::login;
 use crate::data::*;
 use crate::database::*;
 use crate::files::{is_image_or_video, is_valid_full_path};
+use crate::service::ServiceBuilder;
 use crate::state::AppState;
 use crate::tags::*;
 use crate::video::*;
@@ -49,6 +50,7 @@ mod state;
 mod tags;
 mod video;
 
+mod service;
 #[cfg(test)]
 mod testhelpers;
 
@@ -482,14 +484,7 @@ fn main() -> std::io::Result<()> {
                 .service(put_add_favorite)
                 .service(delete_favorite)
                 .service(get_file_metadata)
-                .service(
-                    web::resource("image/tags")
-                        .route(web::post().to(add_tag::<SqliteTagDao>))
-                        .route(web::get().to(get_tags::<SqliteTagDao>))
-                        .route(web::delete().to(remove_tagged_photo::<SqliteTagDao>)),
-                )
-                .service(web::resource("image/tags/all").route(web::get().to(get_all_tags::<SqliteTagDao>)))
-                .service(web::resource("image/tags/batch").route(web::post().to(update_tags::<SqliteTagDao>)))
+                .add_feature(add_tag_services::<_, SqliteTagDao>)
                 .app_data(app_data.clone())
                 .app_data::<Data<Mutex<SqliteUserDao>>>(Data::new(Mutex::new(user_dao)))
                 .app_data::<Data<Mutex<Box<dyn FavoriteDao>>>>(Data::new(Mutex::new(Box::new(