Use configuration to connect to db (#11)

* Add configuration yaml file

* Add config dependency

* Add configuration model and postgres connect string method

* Use configuration to connect to db

Cargo.toml

@@ -11,6 +11,7 @@ path = "src/lib.rs"
 axum = "0.6.1"
 tokio = { version = "1.29.1", features = ["macros", "rt-multi-thread"] }
 serde = { version = "1.0.171", features = ["derive"] }
+config = "0.13.3"
 
 [dependencies.sqlx]
 version = "0.7.1"

Tests/full_url.rs

@@ -1,10 +1,18 @@
 pub mod shared;
 
+use briefly::configuration::get_configuration;
 use shared::test_app::TestApp;
+use sqlx::{Connection, PgConnection};
 
 #[tokio::test]
 async fn full_url_returns_200_for_valid_form_data() {
     let app = TestApp::new().await;
+    let configuration = get_configuration().expect("Failed to read configuration");
+    let connection_string = configuration.database.connection_string();
+
+    let connection = PgConnection::connect(&connection_string)
+        .await
+        .expect("Failed to connect to Postgres");
 
     let body = String::from("{\"url\":\"www.google.com\",\"extension\":\"google\"}");
     let response = app.post("full_url", body).send().await.unwrap();

configuration.yaml

@@ -0,0 +1,7 @@
+application_port: 8000
+database:
+  host: "127.0.0.1"
+  port: 5432
+  username: "postgres"
+  password: "password"
+  database_name: "briefly" 

src/configuration.rs

@@ -0,0 +1,31 @@
+use config::Config;
+
+#[derive(serde::Deserialize)]
+pub struct Settings {
+    pub database: DatabaseSettings,
+    pub application_port: u16,
+}
+
+#[derive(serde::Deserialize)]
+pub struct DatabaseSettings {
+    pub username: String,
+    pub password: String,
+    pub port: u16,
+    pub host: String,
+    pub database_name: String,
+}
+
+pub fn get_configuration() -> Result<Settings, config::ConfigError> {
+    let builder = Config::builder().add_source(config::File::with_name("configuration"));
+    let config = builder.build()?;
+    config.try_deserialize()
+}
+
+impl DatabaseSettings {
+    pub fn connection_string(&self) -> String {
+        format!(
+            "postgres://{}:{}@{}:{}/{}",
+            self.username, self.password, self.host, self.port, self.database_name
+        )
+    }
+}