Feature/read recipe (#10)

* Impl Default for Recipe

* Simple construction

* Base repository trait

* Code organization + nested

* With context

* POSTGRESgit ap! LFG

* formatting

* Lints

* Fmt

lambda/Cargo.toml

@@ -11,7 +11,7 @@ lambda_http = "0.9.0"
 lambda_runtime = "0.9.0"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0.111"
-sqlx = { version = "0.7.3", features = ["runtime-tokio", "postgres"] }
+sqlx = { version = "0.7.3", features = ["runtime-tokio", "macros", "postgres", "uuid"] }
 tokio = { version = "1", features = ["macros"] }
 tracing = { version = "0.1", features = ["log"] }
 tracing-subscriber = { version = "0.3", default-features = false, features = ["fmt"] }

lambda/src/lib.rs

@@ -0,0 +1,10 @@
+use std::future::Future;
+
+use uuid::Uuid;
+
+pub mod recipe;
+pub mod services;
+
+pub trait Repository<T>: Send + Sync {
+    fn find_by_id(&self, id: Uuid) -> impl Future<Output = Option<T>>;
+}

lambda/src/main.rs

@@ -2,12 +2,11 @@ use axum::extract::Query;
 use axum::response::Json;
 use axum::routing::get;
 use axum::Router;
+use lambda::services;
 use lambda_http::{run, Error};
 use serde::Deserialize;
 use serde_json::{json, Value};
 
-mod recipe;
-
 #[derive(Debug, Deserialize)]
 struct Root {
     name: String,
@@ -30,9 +29,11 @@ async fn main() -> Result<(), Error> {
         .without_time()
         .init();
 
+    let recipe_service = services::recipes().await;
     let app = Router::new()
         .route("/", get(root))
-        .route("/ping", get(ping));
+        .route("/ping", get(ping))
+        .nest("/recipes", recipe_service);
 
     run(app).await
 }

lambda/src/recipe/mod.rs

@@ -1,8 +1,18 @@
 use serde::{Deserialize, Serialize};
+use sqlx::FromRow;
 use uuid::Uuid;
 
-#[derive(Deserialize, Serialize)]
+#[derive(Deserialize, FromRow, Serialize)]
 pub struct Recipe {
     id: Uuid,
     name: String,
 }
+
+impl Default for Recipe {
+    fn default() -> Self {
+        Self {
+            id: Uuid::nil(),
+            name: "Basic Recipe".to_owned(),
+        }
+    }
+}

lambda/src/services/mod.rs

@@ -0,0 +1,29 @@
+use axum::routing::get;
+use axum::Router;
+
+use crate::services::recipes::PostgresRecipeRepository;
+
+mod recipes;
+
+#[derive(Clone)]
+struct ApplicationContext<T> {
+    pub repo: T,
+}
+
+pub async fn recipes() -> Router {
+    let db_username = std::env::var("DB_USERNAME").unwrap_or_else(|_| "postgres".to_string());
+    let db_password = std::env::var("DB_PASSWORD").unwrap_or_else(|_| "password1234".to_string());
+    let db_host = std::env::var("DB_HOST").unwrap_or_else(|_| "db".to_string());
+    let db_port = std::env::var("DB_PORT").unwrap_or_else(|_| "5432".to_string());
+    let db_name = std::env::var("DB_NAME").unwrap_or_else(|_| "meal-planner".to_string());
+    let db_connection_str =
+        format!("postgresql://{db_username}:{db_password}@{db_host}:{db_port}/{db_name}");
+
+    let recipe_context = ApplicationContext {
+        repo: PostgresRecipeRepository::new(&db_connection_str).await,
+    };
+
+    Router::new()
+        .route("/:id", get(recipes::read_one::<PostgresRecipeRepository>))
+        .with_state(recipe_context)
+}

lambda/src/services/recipes.rs

@@ -0,0 +1,64 @@
+use std::time::Duration;
+
+use axum::extract::{Path, State};
+use axum::http::StatusCode;
+use axum::Json;
+use sqlx::postgres::PgPoolOptions;
+use sqlx::{Error, PgPool};
+use uuid::Uuid;
+
+use crate::recipe::Recipe;
+use crate::services::ApplicationContext;
+use crate::Repository;
+
+#[derive(Clone)]
+pub(super) struct TestRecipeRepository {}
+
+#[derive(Clone)]
+pub(super) struct PostgresRecipeRepository {
+    pool: PgPool,
+}
+
+impl PostgresRecipeRepository {
+    pub(super) async fn new(url: &String) -> Self {
+        let pool: PgPool = PgPoolOptions::new()
+            .max_connections(5)
+            .acquire_timeout(Duration::from_secs(3))
+            .connect(&url)
+            .await
+            .expect("Can\'t connect to database");
+
+        Self { pool }
+    }
+}
+
+impl Repository<Recipe> for PostgresRecipeRepository {
+    async fn find_by_id(&self, id: Uuid) -> Option<Recipe> {
+        let result: Result<Recipe, Error> = sqlx::query_as("SELECT * FROM recipes WHERE id = $1")
+            .bind(id)
+            .fetch_one(&self.pool)
+            .await;
+
+        match result {
+            Ok(recipe) => Some(recipe),
+            Err(err) => {
+                dbg!(err);
+                None
+            },
+        }
+    }
+}
+
+pub(super) async fn read_one<T>(
+    State(state): State<ApplicationContext<T>>,
+    Path(id): Path<Uuid>,
+) -> Result<Json<Recipe>, StatusCode>
+where
+    T: Repository<Recipe>,
+{
+    if let Some(recipe) = state.repo.find_by_id(id).await {
+        return Ok(Json(recipe));
+    }
+
+    Err(StatusCode::NOT_FOUND)
+}