Add Connection string builder

src/main.rs

@@ -130,11 +130,38 @@ async fn download(
     }
 }
 
+fn get_db_url() -> String {
+    return env::var("DATABASE_URL").unwrap_or_else(|_| {
+        let mut url = "postgresql://".to_string();
+
+        let user = env::var("DATABASE_USER").unwrap_or_default();
+        if !user.is_empty() {
+            url += user.as_str();
+
+            let pass = env::var("DATABASE_PASS").unwrap_or_default();
+            if !pass.is_empty() {
+                url += ":";
+                url += pass.as_str();
+            }
+
+            url += "@";
+        }
+        url += env::var("DATABASE_HOST").unwrap_or_else(|_| "localhost".to_string()).as_str();
+        url += "/";
+        url += env::var("DATABASE_NAME").unwrap_or_else(|_| "datatrash".to_string()).as_str();
+
+        url.to_string()
+    });
+}
+
 async fn setup_db() -> PgPool {
+    let conn_url = &get_db_url();
+    log::info!("Using Connection string {}", conn_url);
+
     let pool = PgPool::builder()
         .max_size(5)
         .connect_timeout(std::time::Duration::from_secs(5))
-        .build(&env::var("DATABASE_URL").unwrap_or_else(|_| "postgresql://localhost".to_owned()))
+        .build(conn_url)
         .await
         .expect("could not create db pool");