Downloading song endpoint (#165)

* Added initial code for downloading song endpoint

* Finished download song endpoint

* Making download endpoint available

* Added test

* Code formatting

* Version bump

src/callers/song.rs

@@ -1059,4 +1059,39 @@ pub mod endpoint {
             )),
         }
     }
+
+    pub async fn download_song(
+        axum::Extension(pool): axum::Extension<sqlx::PgPool>,
+        axum::extract::Path(id): axum::extract::Path<uuid::Uuid>,
+    ) -> (axum::http::StatusCode, axum::response::Response) {
+        match super::song_db::get_song(&pool, &id).await {
+            Ok(song) => match song.to_data() {
+                Ok(data) => {
+                    let bytes = axum::body::Bytes::from(data);
+                    let mut response = bytes.into_response();
+                    let headers = response.headers_mut();
+                    headers.insert(
+                        axum::http::header::CONTENT_TYPE,
+                        "audio/flac".parse().unwrap(),
+                    );
+                    headers.insert(
+                        axum::http::header::CONTENT_DISPOSITION,
+                        format!("attachment; filename=\"{id}.flac\"")
+                            .parse()
+                            .unwrap(),
+                    );
+
+                    (axum::http::StatusCode::OK, response)
+                }
+                Err(_err) => (
+                    axum::http::StatusCode::INTERNAL_SERVER_ERROR,
+                    axum::response::Response::default(),
+                ),
+            },
+            Err(_err) => (
+                axum::http::StatusCode::NOT_FOUND,
+                axum::response::Response::default(),
+            ),
+        }
+    }
 }