feat: repository architecture for files crate w. added tests

Signed-off-by: izzy <me@insrt.uk>

crates/core/files/tests/s3_test.rs

@@ -0,0 +1,42 @@
+use revolt_files::{EncryptionKey, FileStorageRepository, S3Storage};
+
+#[tokio::test]
+async fn test_upload_and_download() {
+    let encryption = EncryptionKey::from_config().await;
+    let s3 = S3Storage::from_config(encryption).await;
+
+    let buf = [67];
+    let bucket_id = uuid::Uuid::new_v4().to_string();
+
+    s3.create_bucket(&bucket_id).await.unwrap();
+
+    let iv = s3
+        .encrypt_and_upload_file(&bucket_id, "/my-file", &buf)
+        .await
+        .unwrap();
+
+    let buf = s3
+        .fetch_and_decrypt_file(&bucket_id, "/my-file", &iv)
+        .await
+        .unwrap();
+
+    assert_eq!(buf.len(), 1);
+    assert_eq!(buf[0], 67);
+}
+
+#[tokio::test]
+async fn test_upload_and_delete() {
+    let encryption = EncryptionKey::from_config().await;
+    let s3 = S3Storage::from_config(encryption).await;
+
+    let buf = [67];
+    let bucket_id = uuid::Uuid::new_v4().to_string();
+
+    s3.create_bucket(&bucket_id).await.unwrap();
+
+    s3.encrypt_and_upload_file(&bucket_id, "/my-file", &buf)
+        .await
+        .unwrap();
+
+    s3.delete_file(&bucket_id, "/my-file").await.unwrap();
+}