refactor(api): [#198] Axum API, tag context

src/web/api/v1/contexts/mod.rs

@@ -6,12 +6,14 @@
 //! `Category` | Torrent categories | [`v1`](crate::web::api::v1::contexts::category)
 //! `Proxy` | Image proxy cache | [`v1`](crate::web::api::v1::contexts::proxy)
 //! `Settings` | Index settings | [`v1`](crate::web::api::v1::contexts::settings)
+//! `Tag` | Torrent tags | [`v1`](crate::web::api::v1::contexts::tag)
 //! `Torrent` | Indexed torrents | [`v1`](crate::web::api::v1::contexts::torrent)
 //! `User` | Users | [`v1`](crate::web::api::v1::contexts::user)
 //!
 pub mod about;
 pub mod category;
 pub mod proxy;
 pub mod settings;
+pub mod tag;
 pub mod torrent;
 pub mod user;

src/web/api/v1/contexts/tag/forms.rs

@@ -0,0 +1,15 @@
+//! API forms for the the [`tag`](crate::web::api::v1::contexts::tag) API
+//! context.
+use serde::{Deserialize, Serialize};
+
+use crate::models::torrent_tag::TagId;
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct AddTagForm {
+    pub name: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct DeleteTagForm {
+    pub tag_id: TagId,
+}

src/web/api/v1/contexts/tag/handlers.rs

@@ -0,0 +1,82 @@
+//! API handlers for the [`tag`](crate::web::api::v1::contexts::tag) API
+//! context.
+use std::sync::Arc;
+
+use axum::extract::{self, State};
+use axum::response::Json;
+
+use super::forms::{AddTagForm, DeleteTagForm};
+use super::responses::{added_tag, deleted_tag};
+use crate::common::AppData;
+use crate::databases::database;
+use crate::errors::ServiceError;
+use crate::models::torrent_tag::TorrentTag;
+use crate::web::api::v1::extractors::bearer_token::Extract;
+use crate::web::api::v1::responses::{self, OkResponse};
+
+/// It handles the request to get all the tags.
+///
+/// It returns:
+///
+/// - `200` response with a json containing the tag list [`Vec<TorrentTag>`](crate::models::torrent_tag::TorrentTag).
+/// - Other error status codes if there is a database error.
+///
+/// Refer to the [API endpoint documentation](crate::web::api::v1::contexts::tag)
+/// for more information about this endpoint.
+///
+/// # Errors
+///
+/// It returns an error if there is a database error.
+#[allow(clippy::unused_async)]
+pub async fn get_all_handler(
+    State(app_data): State<Arc<AppData>>,
+) -> Result<Json<responses::OkResponse<Vec<TorrentTag>>>, database::Error> {
+    match app_data.tag_repository.get_all().await {
+        Ok(tags) => Ok(Json(responses::OkResponse { data: tags })),
+        Err(error) => Err(error),
+    }
+}
+
+/// It adds a new tag.
+///
+/// # Errors
+///
+/// It returns an error if:
+///
+/// - The user does not have permissions to create a new tag.
+/// - There is a database error.
+#[allow(clippy::unused_async)]
+pub async fn add_handler(
+    State(app_data): State<Arc<AppData>>,
+    Extract(maybe_bearer_token): Extract,
+    extract::Json(add_tag_form): extract::Json<AddTagForm>,
+) -> Result<Json<OkResponse<String>>, ServiceError> {
+    let user_id = app_data.auth.get_user_id_from_bearer_token(&maybe_bearer_token).await?;
+
+    match app_data.tag_service.add_tag(&add_tag_form.name, &user_id).await {
+        Ok(_) => Ok(added_tag(&add_tag_form.name)),
+        Err(error) => Err(error),
+    }
+}
+
+/// It deletes a tag.
+///
+/// # Errors
+///
+/// It returns an error if:
+///
+/// - The user does not have permissions to delete tags.
+/// - There is a database error.
+#[allow(clippy::unused_async)]
+pub async fn delete_handler(
+    State(app_data): State<Arc<AppData>>,
+    Extract(maybe_bearer_token): Extract,
+    extract::Json(delete_tag_form): extract::Json<DeleteTagForm>,
+) -> Result<Json<OkResponse<String>>, ServiceError> {
+    let user_id = app_data.auth.get_user_id_from_bearer_token(&maybe_bearer_token).await?;
+
+    match app_data.tag_service.delete_tag(&delete_tag_form.tag_id, &user_id).await {
+        Ok(_) => Ok(deleted_tag(delete_tag_form.tag_id)),
+        Err(error) => Err(error),
+    }
+}

src/web/api/v1/contexts/tag/mod.rs

@@ -0,0 +1,123 @@
+//! API context: `tag`.
+//!
+//! This API context is responsible for handling torrent tags.
+//!
+//! # Endpoints
+//!
+//! - [Get all tags](#get-all-tags)
+//! - [Add a tag](#add-a-tag)
+//! - [Delete a tag](#delete-a-tag)
+//!
+//! **NOTICE**: We don't support multiple languages yet, so the tag is always
+//! in English.
+//!
+//! # Get all tags
+//!
+//! `GET /v1/tag`
+//!
+//! Returns all torrent tags.
+//!
+//! **Example request**
+//!
+//! ```bash
+//! curl "http://127.0.0.1:3000/v1/tags"
+//! ```
+//!
+//! **Example response** `200`
+//!
+//! ```json
+//! {
+//!   "data": [
+//!     {
+//!       "tag_id": 1,
+//!       "name": "anime"
+//!     },
+//!     {
+//!       "tag_id": 2,
+//!       "name": "manga"
+//!     }
+//!   ]
+//! }
+//! ```
+//! **Resource**
+//!
+//! Refer to the [`Tag`](crate::databases::database::Tag)
+//! struct for more information about the response attributes.
+//!
+//! # Add a tag
+//!
+//! `POST /v1/tag`
+//!
+//! It adds a new tag.
+//!
+//! **POST params**
+//!
+//! Name | Type | Description | Required | Example
+//! ---|---|---|---|---
+//! `name` | `String` | The tag name | Yes | `new tag`
+//!
+//! **Example request**
+//!
+//! ```bash
+//! curl \
+//!   --header "Content-Type: application/json" \
+//!   --header "Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyIjp7InVzZXJfaWQiOjEsInVzZXJuYW1lIjoiaW5kZXhhZG1pbiIsImFkbWluaXN0cmF0b3IiOnRydWV9LCJleHAiOjE2ODYyMTU3ODh9.4k8ty27DiWwOk4WVcYEhIrAndhpXMRWnLZ3i_HlJnvI" \
+//!   --request POST \
+//!   --data '{"name":"new tag"}' \
+//!   http://127.0.0.1:3000/v1/tag
+//! ```
+//!
+//! **Example response** `200`
+//!
+//! ```json
+//! {
+//!   "data": "new tag"
+//! }
+//! ```
+//!
+//! **Resource**
+//!
+//! Refer to [`OkResponse`](crate::models::response::OkResponse<T>) for more
+//! information about the response attributes. The response contains only the
+//! name of the newly created tag.
+//!
+//! # Delete a tag
+//!
+//! `DELETE /v1/tag`
+//!
+//! It deletes a tag.
+//!
+//! **POST params**
+//!
+//! Name | Type | Description | Required | Example
+//! ---|---|---|---|---
+//! `tag_id` | `i64` | The internal tag ID | Yes | `1`
+//!
+//! **Example request**
+//!
+//! ```bash
+//! curl \
+//!   --header "Content-Type: application/json" \
+//!   --header "Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyIjp7InVzZXJfaWQiOjEsInVzZXJuYW1lIjoiaW5kZXhhZG1pbiIsImFkbWluaXN0cmF0b3IiOnRydWV9LCJleHAiOjE2ODYyMTU3ODh9.4k8ty27DiWwOk4WVcYEhIrAndhpXMRWnLZ3i_HlJnvI" \
+//!   --request DELETE \
+//!   --data '{"tag_id":1}' \
+//!   http://127.0.0.1:3000/v1/tag
+//! ```
+//!
+//! **Example response** `200`
+//!
+//! ```json
+//! {
+//!   "data": 1
+//! }
+//! ```
+//!
+//! **Resource**
+//!
+//! Refer to [`OkResponse`](crate::models::response::OkResponse<T>) for more
+//! information about the response attributes. The response contains only the
+//! name of the deleted tag.
+pub mod forms;
+pub mod handlers;
+pub mod responses;
+pub mod routes;

src/web/api/v1/contexts/tag/responses.rs

@@ -0,0 +1,20 @@
+//! API responses for the [`tag`](crate::web::api::v1::contexts::tag) API
+//! context.
+use axum::Json;
+
+use crate::models::torrent_tag::TagId;
+use crate::web::api::v1::responses::OkResponse;
+
+/// Response after successfully creating a new tag.
+pub fn added_tag(tag_name: &str) -> Json<OkResponse<String>> {
+    Json(OkResponse {
+        data: tag_name.to_string(),
+    })
+}
+
+/// Response after successfully deleting a tag.
+pub fn deleted_tag(tag_id: TagId) -> Json<OkResponse<String>> {
+    Json(OkResponse {
+        data: tag_id.to_string(),
+    })
+}

src/web/api/v1/contexts/tag/routes.rs

@@ -0,0 +1,24 @@
+//! API routes for the [`tag`](crate::web::api::v1::contexts::tag) API context.
+//!
+//! Refer to the [API endpoint documentation](crate::web::api::v1::contexts::tag).
+use std::sync::Arc;
+
+use axum::routing::{delete, get, post};
+use axum::Router;
+
+use super::handlers::{add_handler, delete_handler, get_all_handler};
+use crate::common::AppData;
+
+// code-review: should we use `tags` also for single resources?
+
+/// Routes for the [`tag`](crate::web::api::v1::contexts::tag) API context.
+pub fn router_for_single_resources(app_data: Arc<AppData>) -> Router {
+    Router::new()
+        .route("/", post(add_handler).with_state(app_data.clone()))
+        .route("/", delete(delete_handler).with_state(app_data))
+}
+
+/// Routes for the [`tag`](crate::web::api::v1::contexts::tag) API context.
+pub fn router_for_multiple_resources(app_data: Arc<AppData>) -> Router {
+    Router::new().route("/", get(get_all_handler).with_state(app_data))
+}

src/web/api/v1/routes.rs

@@ -4,20 +4,25 @@ use std::sync::Arc;
 use axum::routing::get;
 use axum::Router;
 
-//use tower_http::cors::CorsLayer;
-use super::contexts::about;
 use super::contexts::about::handlers::about_page_handler;
+//use tower_http::cors::CorsLayer;
+use super::contexts::{about, tag};
 use super::contexts::{category, user};
 use crate::common::AppData;
 
 /// Add all API routes to the router.
 #[allow(clippy::needless_pass_by_value)]
 pub fn router(app_data: Arc<AppData>) -> Router {
+    // code-review: should we use plural for the resource prefix: `users`, `categories`, `tags`?
+    // See: https://stackoverflow.com/questions/6845772/should-i-use-singular-or-plural-name-convention-for-rest-resources
+
     let v1_api_routes = Router::new()
         .route("/", get(about_page_handler).with_state(app_data.clone()))
         .nest("/user", user::routes::router(app_data.clone()))
         .nest("/about", about::routes::router(app_data.clone()))
-        .nest("/category", category::routes::router(app_data.clone()));
+        .nest("/category", category::routes::router(app_data.clone()))
+        .nest("/tag", tag::routes::router_for_single_resources(app_data.clone()))
+        .nest("/tags", tag::routes::router_for_multiple_resources(app_data.clone()));
 
     Router::new()
         .route("/", get(about_page_handler).with_state(app_data))

tests/common/contexts/tag/asserts.rs

@@ -0,0 +1,23 @@
+use torrust_index_backend::models::torrent_tag::TagId;
+
+use crate::common::asserts::assert_json_ok;
+use crate::common::contexts::tag::responses::{AddedTagResponse, DeletedTagResponse};
+use crate::common::responses::TextResponse;
+
+pub fn assert_added_tag_response(response: &TextResponse, tag_name: &str) {
+    let added_tag_response: AddedTagResponse = serde_json::from_str(&response.body)
+        .unwrap_or_else(|_| panic!("response {:#?} should be a AddedTagResponse", response.body));
+
+    assert_eq!(added_tag_response.data, tag_name);
+
+    assert_json_ok(response);
+}
+
+pub fn assert_deleted_tag_response(response: &TextResponse, tag_id: TagId) {
+    let deleted_tag_response: DeletedTagResponse = serde_json::from_str(&response.body)
+        .unwrap_or_else(|_| panic!("response {:#?} should be a DeletedTagResponse", response.body));
+
+    assert_eq!(deleted_tag_response.data, tag_id);
+
+    assert_json_ok(response);
+}

tests/common/contexts/tag/mod.rs

@@ -1,3 +1,4 @@
+pub mod asserts;
 pub mod fixtures;
 pub mod forms;
 pub mod responses;

tests/common/contexts/tag/responses.rs

@@ -1,13 +1,27 @@
 use serde::Deserialize;
 
+// code-review: we should always include a API resource in the `data`attribute.
+//
+// ```
+// pub struct DeletedTagResponse {
+//    pub data: DeletedTag,
+// }
+//
+// pub struct DeletedTag {
+//   pub tag_id: i64,
+// }
+// ```
+//
+// This way the API client knows what's the meaning of the `data` attribute.
+
 #[derive(Deserialize)]
 pub struct AddedTagResponse {
     pub data: String,
 }
 
 #[derive(Deserialize)]
 pub struct DeletedTagResponse {
-    pub data: i64, // tag_id
+    pub data: i64,
 }
 
 #[derive(Deserialize, Debug)]