feat: backend implement get label by ID functionality in label management

backend/feature/label/src/adapter/delivery/label_controller.rs

@@ -12,6 +12,7 @@ use crate::{
         use_case::{
             create_label_use_case::CreateLabelUseCase,
             get_all_labels_use_case::GetAllLabelsUseCase,
+            get_label_by_id_use_case::GetLabelByIdUseCase,
             update_label_use_case::UpdateLabelUseCase,
         },
     },
@@ -31,12 +32,15 @@ pub trait LabelController: Send + Sync {
     ) -> Result<LabelResponseDto, LabelError>;
 
     async fn get_all_labels(&self) -> Result<Vec<LabelResponseDto>, LabelError>;
+
+    async fn get_label_by_id(&self, id: i32) -> Result<LabelResponseDto, LabelError>;
 }
 
 pub struct LabelControllerImpl {
     create_label_use_case: Arc<dyn CreateLabelUseCase>,
     update_label_use_case: Arc<dyn UpdateLabelUseCase>,
     get_all_labels_use_case: Arc<dyn GetAllLabelsUseCase>,
+    get_label_by_id_use_case: Arc<dyn GetLabelByIdUseCase>,
 }
 
 impl LabelControllerImpl {
@@ -44,11 +48,13 @@ impl LabelControllerImpl {
         create_label_use_case: Arc<dyn CreateLabelUseCase>,
         update_label_use_case: Arc<dyn UpdateLabelUseCase>,
         get_all_labels_use_case: Arc<dyn GetAllLabelsUseCase>,
+        get_label_by_id_use_case: Arc<dyn GetLabelByIdUseCase>,
     ) -> Self {
         Self {
             create_label_use_case,
             update_label_use_case,
             get_all_labels_use_case,
+            get_label_by_id_use_case,
         }
     }
 }
@@ -83,13 +89,17 @@ impl LabelController for LabelControllerImpl {
     }
 
     async fn get_all_labels(&self) -> Result<Vec<LabelResponseDto>, LabelError> {
-        let result = self.get_all_labels_use_case.execute().await;
+        let result = self.get_all_labels_use_case.execute().await?;
 
-        result.map(|labels| {
-            labels
-                .into_iter()
-                .map(|label| LabelResponseDto::from(label))
-                .collect()
-        })
+        Ok(result
+            .into_iter()
+            .map(|label| LabelResponseDto::from(label))
+            .collect())
+    }
+
+    async fn get_label_by_id(&self, id: i32) -> Result<LabelResponseDto, LabelError> {
+        let label = self.get_label_by_id_use_case.execute(id).await?;
+
+        Ok(LabelResponseDto::from(label))
     }
 }

backend/feature/label/src/application/use_case.rs

@@ -1,3 +1,4 @@
 pub mod create_label_use_case;
 pub mod get_all_labels_use_case;
+pub mod get_label_by_id_use_case;
 pub mod update_label_use_case;

backend/feature/label/src/application/use_case/get_label_by_id_use_case.rs

@@ -0,0 +1,30 @@
+use std::sync::Arc;
+
+use async_trait::async_trait;
+
+use crate::{
+    application::{error::label_error::LabelError, gateway::label_repository::LabelRepository},
+    domain::entity::label::Label,
+};
+
+#[async_trait]
+pub trait GetLabelByIdUseCase: Send + Sync {
+    async fn execute(&self, id: i32) -> Result<Label, LabelError>;
+}
+
+pub struct GetLabelByIdUseCaseImpl {
+    repository: Arc<dyn LabelRepository>,
+}
+
+impl GetLabelByIdUseCaseImpl {
+    pub fn new(repository: Arc<dyn LabelRepository>) -> Self {
+        Self { repository }
+    }
+}
+
+#[async_trait]
+impl GetLabelByIdUseCase for GetLabelByIdUseCaseImpl {
+    async fn execute(&self, id: i32) -> Result<Label, LabelError> {
+        self.repository.get_label_by_id(id).await
+    }
+}

backend/feature/label/src/framework/web.rs

@@ -1,5 +1,6 @@
 pub mod create_label_handler;
 pub mod get_all_labels_handler;
+pub mod get_label_by_id_handler;
 pub mod label_api_doc;
 pub mod label_web_routes;
 pub mod update_label_handler;

backend/feature/label/src/framework/web/get_label_by_id_handler.rs

@@ -0,0 +1,41 @@
+use actix_web::{HttpResponse, Responder, web};
+use anyhow::anyhow;
+use sentry::integrations::anyhow::capture_anyhow;
+
+use crate::{
+    adapter::delivery::{label_controller::LabelController, label_response_dto::LabelResponseDto},
+    application::error::label_error::LabelError,
+};
+
+#[utoipa::path(
+    get,
+    path = "/label/{id}",
+    tag = "label",
+    summary = "Get the label by ID",
+    responses(
+        (status = 200, body = LabelResponseDto),
+        (status = 404, description = LabelError::NotFound),
+    )
+)]
+pub async fn get_label_by_id_handler(
+    label_controller: web::Data<dyn LabelController>,
+    path: web::Path<i32>,
+) -> impl Responder {
+    let id = path.into_inner();
+    let result = label_controller.get_label_by_id(id).await;
+
+    match result {
+        Ok(labels) => HttpResponse::Ok().json(labels),
+        Err(e) => match e {
+            LabelError::NotFound => HttpResponse::NotFound().finish(),
+            LabelError::Unauthorized | LabelError::DuplicatedLabelName => {
+                capture_anyhow(&anyhow!(e));
+                HttpResponse::InternalServerError().finish()
+            }
+            LabelError::Unexpected(e) => {
+                capture_anyhow(&e);
+                HttpResponse::InternalServerError().finish()
+            }
+        },
+    }
+}

backend/feature/label/src/framework/web/label_api_doc.rs

@@ -1,11 +1,14 @@
-use crate::framework::web::{create_label_handler, get_all_labels_handler, update_label_handler};
+use crate::framework::web::{
+    create_label_handler, get_all_labels_handler, get_label_by_id_handler, update_label_handler,
+};
 use utoipa::{OpenApi, openapi};
 
 #[derive(OpenApi)]
 #[openapi(paths(
     create_label_handler::create_label_handler,
     update_label_handler::update_label_handler,
-    get_all_labels_handler::get_all_labels_handler
+    get_all_labels_handler::get_all_labels_handler,
+    get_label_by_id_handler::get_label_by_id_handler
 ))]
 struct ApiDoc;
 

backend/feature/label/src/framework/web/label_web_routes.rs

@@ -2,13 +2,14 @@ use actix_web::web;
 
 use crate::framework::web::{
     create_label_handler::create_label_handler, get_all_labels_handler::get_all_labels_handler,
-    update_label_handler::update_label_handler,
+    get_label_by_id_handler::get_label_by_id_handler, update_label_handler::update_label_handler,
 };
 
 pub fn configure_label_routes(cfg: &mut web::ServiceConfig) {
     cfg.service(
         web::scope("/label")
             .route("", web::get().to(get_all_labels_handler))
+            .route("/{id}", web::get().to(get_label_by_id_handler))
             .route("", web::post().to(create_label_handler))
             .route("/{id}", web::put().to(update_label_handler)),
     );

backend/server/src/container.rs

@@ -35,6 +35,7 @@ use label::{
     application::use_case::{
         create_label_use_case::CreateLabelUseCaseImpl,
         get_all_labels_use_case::GetAllLabelsUseCaseImpl,
+        get_label_by_id_use_case::GetLabelByIdUseCaseImpl,
         update_label_use_case::UpdateLabelUseCaseImpl,
     },
     framework::db::label_db_service_impl::LabelDbServiceImpl,
@@ -104,11 +105,14 @@ impl Container {
         let update_label_use_case = Arc::new(UpdateLabelUseCaseImpl::new(label_repository.clone()));
         let get_all_labels_use_case =
             Arc::new(GetAllLabelsUseCaseImpl::new(label_repository.clone()));
+        let get_label_by_id_use_case =
+            Arc::new(GetLabelByIdUseCaseImpl::new(label_repository.clone()));
 
         let label_controller = Arc::new(LabelControllerImpl::new(
             create_label_use_case,
             update_label_use_case,
             get_all_labels_use_case,
+            get_label_by_id_use_case,
         ));
 
         // Post