BLOG-43 feat: get full post

backend/Cargo.lock

@@ -1489,9 +1489,9 @@ dependencies = [
  "actix-web",
  "async-trait",
  "chrono",
+ "log",
  "serde",
  "sqlx",
- "tokio",
 ]
 
 [[package]]
@@ -2230,21 +2230,9 @@ dependencies = [
  "pin-project-lite",
  "signal-hook-registry",
  "socket2",
- "tokio-macros",
  "windows-sys 0.52.0",
 ]
 
-[[package]]
-name = "tokio-macros"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e06d43f1345a3bcd39f6a56dbb7dcab2ba47e68e8ac134855e7e2bdbaf8cab8"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "tokio-stream"
 version = "0.1.17"

backend/Cargo.toml

@@ -13,6 +13,7 @@ chrono = "0.4.41"
 dotenv = "0.15.0"
 env_logger = "0.11.8"
 futures = "0.3.31"
+log = "0.4.27"
 serde = { version = "1.0.219", features = ["derive"] }
 sqlx = { version = "0.8.5", features = [
     "chrono",

backend/README.md

@@ -0,0 +1,42 @@
+# Backend
+
+## Development
+
+### SQL Migration
+
+1. Install sqlx
+
+   ```bash
+   cargo install sqlx-cli
+   ```
+
+2. Run migration
+
+   ```bash
+   sqlx migrate run
+   ```
+
+### Run Project
+
+1. Prepare for sql schema setup
+
+   ```bash
+   cargo sqlx prepare --workspace
+   ```
+
+2. Run the server
+
+   ```bash
+   RUST_LOG=debug cargo run
+   ```
+
+3. (Optional) Hot restart
+
+   1. Install `watchexec`
+
+   2. Run the server with `watchexec`
+
+      ```bash
+      RUST_LOG=debug watchexec -e rs -r 'cargo run'
+      ```
+

backend/feature/post/Cargo.toml

@@ -7,6 +7,6 @@ edition.workspace = true
 actix-web.workspace = true
 async-trait.workspace = true
 chrono.workspace = true
+log.workspace = true
 serde.workspace = true
 sqlx.workspace = true
-tokio.workspace = true

backend/feature/post/src/adapter/delivery.rs

@@ -1,3 +1,4 @@
 pub mod label_response_dto;
 pub mod post_controller;
 pub mod post_info_response_dto;
+pub mod post_response_dto;

backend/feature/post/src/adapter/delivery/post_controller.rs

@@ -3,24 +3,34 @@ use std::sync::Arc;
 use async_trait::async_trait;
 
 use crate::application::{
-    error::post_error::PostError, use_case::get_all_post_info_use_case::GetAllPostInfoUseCase,
+    error::post_error::PostError,
+    use_case::{
+        get_all_post_info_use_case::GetAllPostInfoUseCase,
+        get_full_post_use_case::GetFullPostUseCase,
+    },
 };
 
-use super::post_info_response_dto::PostInfoResponseDto;
+use super::{post_info_response_dto::PostInfoResponseDto, post_response_dto::PostResponseDto};
 
 #[async_trait]
 pub trait PostController: Send + Sync {
     async fn get_all_post_info(&self) -> Result<Vec<PostInfoResponseDto>, PostError>;
+    async fn get_full_post(&self, id: i32) -> Result<PostResponseDto, PostError>;
 }
 
 pub struct PostControllerImpl {
     get_all_post_info_use_case: Arc<dyn GetAllPostInfoUseCase>,
+    get_full_post_use_case: Arc<dyn GetFullPostUseCase>,
 }
 
 impl PostControllerImpl {
-    pub fn new(get_all_post_info_use_case: Arc<dyn GetAllPostInfoUseCase>) -> Self {
+    pub fn new(
+        get_all_post_info_use_case: Arc<dyn GetAllPostInfoUseCase>,
+        get_full_post_use_case: Arc<dyn GetFullPostUseCase>,
+    ) -> Self {
         Self {
             get_all_post_info_use_case,
+            get_full_post_use_case,
         }
     }
 }
@@ -39,4 +49,10 @@ impl PostController for PostControllerImpl {
             post_info_response_dto_list
         })
     }
+
+    async fn get_full_post(&self, id: i32) -> Result<PostResponseDto, PostError> {
+        let result = self.get_full_post_use_case.execute(id).await;
+
+        result.map(PostResponseDto::from)
+    }
 }

backend/feature/post/src/adapter/delivery/post_response_dto.rs

@@ -0,0 +1,22 @@
+use serde::Serialize;
+
+use crate::domain::entity::post::Post;
+
+use super::post_info_response_dto::PostInfoResponseDto;
+
+#[derive(Serialize)]
+pub struct PostResponseDto {
+    pub id: i32,
+    pub info: PostInfoResponseDto,
+    pub content: String,
+}
+
+impl From<Post> for PostResponseDto {
+    fn from(entity: Post) -> Self {
+        Self {
+            id: entity.id,
+            info: PostInfoResponseDto::from(entity.info),
+            content: entity.content,
+        }
+    }
+}

backend/feature/post/src/adapter/gateway/post_db_service.rs

@@ -1,8 +1,12 @@
 use async_trait::async_trait;
 
-use crate::{application::error::post_error::PostError, domain::entity::post_info::PostInfo};
+use crate::{
+    application::error::post_error::PostError,
+    domain::entity::{post::Post, post_info::PostInfo},
+};
 
 #[async_trait]
 pub trait PostDbService: Send + Sync {
     async fn get_all_post_info(&self) -> Result<Vec<PostInfo>, PostError>;
+    async fn get_full_post(&self, id: i32) -> Result<Post, PostError>;
 }

backend/feature/post/src/adapter/gateway/post_repository_impl.rs

@@ -4,7 +4,7 @@ use async_trait::async_trait;
 
 use crate::{
     application::{error::post_error::PostError, gateway::post_repository::PostRepository},
-    domain::entity::post_info::PostInfo,
+    domain::entity::{post::Post, post_info::PostInfo},
 };
 
 use super::post_db_service::PostDbService;
@@ -22,8 +22,10 @@ impl PostRepositoryImpl {
 #[async_trait]
 impl PostRepository for PostRepositoryImpl {
     async fn get_all_post_info(&self) -> Result<Vec<PostInfo>, PostError> {
-        self.post_db_service
-            .get_all_post_info()
-            .await
+        self.post_db_service.get_all_post_info().await
+    }
+
+    async fn get_full_post(&self, id: i32) -> Result<Post, PostError> {
+        self.post_db_service.get_full_post(id).await
     }
 }

backend/feature/post/src/application/error/post_error.rs

@@ -1,3 +1,4 @@
+#[derive(Debug)]
 pub enum PostError {
     DatabaseError(String),
     NotFound,

backend/feature/post/src/application/gateway/post_repository.rs

@@ -1,8 +1,12 @@
 use async_trait::async_trait;
 
-use crate::{application::error::post_error::PostError, domain::entity::post_info::PostInfo};
+use crate::{
+    application::error::post_error::PostError,
+    domain::entity::{post::Post, post_info::PostInfo},
+};
 
 #[async_trait]
 pub trait PostRepository: Send + Sync {
     async fn get_all_post_info(&self) -> Result<Vec<PostInfo>, PostError>;
+    async fn get_full_post(&self, id: i32) -> Result<Post, PostError>;
 }

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

@@ -1 +1,2 @@
 pub mod get_all_post_info_use_case;
+pub mod get_full_post_use_case;

backend/feature/post/src/application/use_case/get_full_post_use_case.rs

@@ -0,0 +1,30 @@
+use std::sync::Arc;
+
+use async_trait::async_trait;
+
+use crate::{
+    application::{error::post_error::PostError, gateway::post_repository::PostRepository},
+    domain::entity::post::Post,
+};
+
+#[async_trait]
+pub trait GetFullPostUseCase: Send + Sync {
+    async fn execute(&self, id: i32) -> Result<Post, PostError>;
+}
+
+pub struct GetFullPostUseCaseImpl {
+    post_repository: Arc<dyn PostRepository>,
+}
+
+impl GetFullPostUseCaseImpl {
+    pub fn new(post_repository: Arc<dyn PostRepository>) -> Self {
+        Self { post_repository }
+    }
+}
+
+#[async_trait]
+impl GetFullPostUseCase for GetFullPostUseCaseImpl {
+    async fn execute(&self, id: i32) -> Result<Post, PostError> {
+        self.post_repository.get_full_post(id).await
+    }
+}

backend/feature/post/src/domain/entity/post_info.rs

@@ -10,3 +10,4 @@ pub struct PostInfo {
     pub labels: Vec<Label>,
     pub published_time: Option<DateTime<Utc>>,
 }
+

backend/feature/post/src/framework/db/post_db_service_impl.rs

@@ -1,12 +1,13 @@
-use std::sync::Arc;
+use std::{any::Any, sync::Arc};
 
 use async_trait::async_trait;
 use chrono::{DateTime, Utc};
-use sqlx::{Pool, Postgres};
+use sqlx::{Error, Pool, Postgres};
 
 use crate::{
-    adapter::gateway::post_db_service::PostDbService, application::error::post_error::PostError,
-    domain::entity::post_info::PostInfo,
+    adapter::gateway::post_db_service::PostDbService,
+    application::error::post_error::PostError,
+    domain::entity::{post::Post, post_info::PostInfo},
 };
 
 pub struct PostDbServiceImpl {
@@ -22,7 +23,7 @@ impl PostDbServiceImpl {
 #[async_trait]
 impl PostDbService for PostDbServiceImpl {
     async fn get_all_post_info(&self) -> Result<Vec<PostInfo>, PostError> {
-        let posts = sqlx::query!(
+        let post_records = sqlx::query!(
             r#"
             SELECT 
                 p.id, 
@@ -38,10 +39,10 @@ impl PostDbService for PostDbServiceImpl {
         .await
         .map_err(|err| PostError::DatabaseError(err.to_string()))?;
 
-        let mut post_infos = Vec::new();
+        let mut post_infos = Vec::<PostInfo>::new();
 
-        for post in posts {
-            let labels = sqlx::query!(
+        for post_record in post_records {
+            let label_records = sqlx::query!(
                 r#"
                 SELECT 
                     l.id,
@@ -52,13 +53,13 @@ impl PostDbService for PostDbServiceImpl {
                 WHERE pl.post_id = $1
                 AND l.deleted_time IS NULL
                 "#,
-                post.id
+                post_record.id
             )
             .fetch_all(&*self.db_pool)
             .await
             .map_err(|err| PostError::DatabaseError(err.to_string()))?;
 
-            let domain_labels = labels
+            let labels = label_records
                 .into_iter()
                 .map(|label| crate::domain::entity::label::Label {
                     id: label.id,
@@ -68,12 +69,12 @@ impl PostDbService for PostDbServiceImpl {
                 .collect();
 
             post_infos.push(PostInfo {
-                id: post.id,
-                title: post.title,
-                description: post.description,
-                preview_image_url: post.preview_image_url,
-                labels: domain_labels,
-                published_time: post
+                id: post_record.id,
+                title: post_record.title,
+                description: post_record.description,
+                preview_image_url: post_record.preview_image_url,
+                labels: labels,
+                published_time: post_record
                     .published_time
                     .map(|dt| DateTime::<Utc>::from_naive_utc_and_offset(dt, Utc)),
             });
@@ -81,4 +82,75 @@ impl PostDbService for PostDbServiceImpl {
 
         Ok(post_infos)
     }
+
+    async fn get_full_post(&self, id: i32) -> Result<Post, PostError> {
+        let post_record = sqlx::query!(
+            r#"
+            SELECT
+                p.id,
+                p.title,
+                p.description,
+                p.preview_image_url,
+                p.content,
+                p.published_time
+            FROM post p
+            WHERE p.id = $1
+            AND p.deleted_time IS NULL
+            "#,
+            id
+        )
+        .fetch_one(&*self.db_pool)
+        .await
+        .map_err(|err| {
+            if err.type_id() == Error::RowNotFound.type_id() {
+                PostError::NotFound
+            } else {
+                PostError::DatabaseError(err.to_string())
+            }
+        })?;
+
+        // TODO: extract label selecting process
+        let label_records = sqlx::query!(
+            r#"
+            SELECT 
+                l.id,
+                l.name,
+                l.color
+            FROM label l
+            JOIN post_label pl ON l.id = pl.label_id
+            WHERE pl.post_id = $1
+            AND l.deleted_time IS NULL
+            "#,
+            post_record.id
+        )
+        .fetch_all(&*self.db_pool)
+        .await
+        .map_err(|err| PostError::DatabaseError(err.to_string()))?;
+
+        let labels = label_records
+            .into_iter()
+            .map(|label| crate::domain::entity::label::Label {
+                id: label.id,
+                name: label.name,
+                color: label.color as u32,
+            })
+            .collect();
+
+        let post = Post {
+            id: post_record.id,
+            content: post_record.content,
+            info: PostInfo {
+                id: post_record.id,
+                title: post_record.title,
+                description: post_record.description,
+                preview_image_url: post_record.preview_image_url,
+                labels: labels,
+                published_time: post_record
+                    .published_time
+                    .map(|dt| DateTime::<Utc>::from_naive_utc_and_offset(dt, Utc)),
+            },
+        };
+
+        Ok(post)
+    }
 }

backend/feature/post/src/framework/web/post_web_routes.rs

@@ -1,24 +1,44 @@
-use std::sync::Arc;
+use std::{any::Any, sync::Arc};
 
 use actix_web::{HttpResponse, Responder, web};
 
 use crate::{
-    adapter::delivery::post_controller::{PostController, PostControllerImpl},
-    application::use_case::get_all_post_info_use_case::GetAllPostInfoUseCase,
+    adapter::delivery::post_controller::PostController, application::error::post_error::PostError,
 };
 
 pub fn configure_post_routes(cfg: &mut web::ServiceConfig) {
     cfg.service(web::resource("/post_info").route(web::get().to(get_all_post_info)));
+    cfg.service(web::resource("/post/{id}").route(web::get().to(get_full_post)));
 }
 
-async fn get_all_post_info(
-    get_all_post_info_use_case: web::Data<Arc<dyn GetAllPostInfoUseCase>>,
-) -> impl Responder {
-    let post_controller = PostControllerImpl::new(get_all_post_info_use_case.get_ref().clone());
+async fn get_all_post_info(post_controller: web::Data<Arc<dyn PostController>>) -> impl Responder {
     let result = post_controller.get_all_post_info().await;
 
     match result {
         Ok(post_info_list) => HttpResponse::Ok().json(post_info_list),
-        Err(_) => HttpResponse::InternalServerError().finish(),
+        Err(e) => {
+            log::error!("{e:?}");
+            HttpResponse::InternalServerError().finish()
+        }
+    }
+}
+
+async fn get_full_post(
+    post_controller: web::Data<Arc<dyn PostController>>,
+    path: web::Path<i32>,
+) -> impl Responder {
+    let id = path.into_inner();
+    let result = post_controller.get_full_post(id).await;
+
+    match result {
+        Ok(post) => HttpResponse::Ok().json(post),
+        Err(e) => {
+            if e.type_id() == PostError::NotFound.type_id() {
+                HttpResponse::NotFound().finish()
+            } else {
+                log::error!("{e:?}");
+                HttpResponse::InternalServerError().finish()
+            }
+        }
     }
 }

backend/server/src/container.rs

@@ -0,0 +1,37 @@
+use std::sync::Arc;
+
+use post::{
+    adapter::{
+        delivery::post_controller::{PostController, PostControllerImpl},
+        gateway::post_repository_impl::PostRepositoryImpl,
+    },
+    application::use_case::{
+        get_all_post_info_use_case::GetAllPostInfoUseCaseImpl,
+        get_full_post_use_case::GetFullPostUseCaseImpl,
+    },
+    framework::db::post_db_service_impl::PostDbServiceImpl,
+};
+use sqlx::{Pool, Postgres};
+
+pub struct Container {
+    pub post_controller: Arc<dyn PostController>,
+}
+
+impl Container {
+    pub fn new(db_pool: Arc<Pool<Postgres>>) -> Self {
+        let post_db_service = Arc::new(PostDbServiceImpl::new(db_pool));
+
+        let post_repository = Arc::new(PostRepositoryImpl::new(post_db_service.clone()));
+
+        let get_all_post_info_use_case =
+            Arc::new(GetAllPostInfoUseCaseImpl::new(post_repository.clone()));
+        let get_full_post_use_case = Arc::new(GetFullPostUseCaseImpl::new(post_repository.clone()));
+
+        let post_controller = Arc::new(PostControllerImpl::new(
+            get_all_post_info_use_case,
+            get_full_post_use_case,
+        ));
+
+        Self { post_controller }
+    }
+}

backend/server/src/lib.rs

@@ -1 +1 @@
-pub mod use_cases;
+pub mod container;

backend/server/src/main.rs

@@ -5,7 +5,7 @@ use actix_web::{
     web,
 };
 use post::framework::web::post_web_routes::configure_post_routes;
-use server::use_cases::UseCases;
+use server::container::Container;
 use sqlx::{Pool, Postgres, postgres::PgPoolOptions};
 use std::{env, sync::Arc};
 
@@ -51,10 +51,10 @@ fn create_app(
         Error = Error,
     >,
 > {
-    let use_cases = UseCases::new(db_pool.clone());
+    let container = Container::new(db_pool.clone());
 
     App::new()
         .app_data(web::Data::new(db_pool))
-        .app_data(web::Data::new(use_cases.get_all_post_info_use_case))
+        .app_data(web::Data::new(container.post_controller))
         .configure(configure_post_routes)
 }

backend/server/src/use_cases.rs

@@ -1,28 +0,0 @@
-use std::sync::Arc;
-
-use post::{
-    adapter::gateway::post_repository_impl::PostRepositoryImpl,
-    application::use_case::get_all_post_info_use_case::{
-        GetAllPostInfoUseCase, GetAllPostInfoUseCaseImpl,
-    },
-    framework::db::post_db_service_impl::PostDbServiceImpl,
-};
-use sqlx::{Pool, Postgres};
-
-pub struct UseCases {
-    pub get_all_post_info_use_case: Arc<dyn GetAllPostInfoUseCase>,
-}
-
-impl UseCases {
-    pub fn new(db_pool: Arc<Pool<Postgres>>) -> Self {
-        let post_db_service = Arc::new(PostDbServiceImpl::new(db_pool));
-
-        let post_repository = Arc::new(PostRepositoryImpl::new(post_db_service));
-
-        let get_all_post_info_use_case = Arc::new(GetAllPostInfoUseCaseImpl::new(post_repository));
-
-        Self {
-            get_all_post_info_use_case,
-        }
-    }
-}