feat: impl files endpoints

apps/backend/internal/blob/store.go

@@ -10,11 +10,21 @@ type UploadURLOptions struct {
 	Duration time.Duration
 }
 
+type DownloadURLOptions struct {
+	Duration time.Duration
+}
+
 type UpdateOptions struct {
 	ContentType string
 }
 
 type Store interface {
+	// SupportsDirectUpload returns true if the store allows files to be uploaded directly to the blob store.
+	SupportsDirectUpload() bool
+
+	// SupportsDirectDownload returns true if the store allows files to be downloaded directly from the blob store.
+	SupportsDirectDownload() bool
+
 	Initialize(ctx context.Context) error
 	Put(ctx context.Context, key Key, reader io.Reader) error
 	Update(ctx context.Context, key Key, opts UpdateOptions) error
@@ -25,9 +35,9 @@ type Store interface {
 	ReadRange(ctx context.Context, key Key, offset, length int64) (io.ReadCloser, error)
 	ReadSize(ctx context.Context, key Key) (int64, error)
 
-	// SupportsDirectUpload returns true if the store allows files to be uploaded directly to the blob store.
-	SupportsDirectUpload() bool
-
 	// GenerateUploadURL generates a URL that can be used to upload a file directly to the blob store. If unsupported, returns an empty string with no error.
 	GenerateUploadURL(ctx context.Context, key Key, opts UploadURLOptions) (string, error)
+
+	// GenerateDownloadURL generates a URL that can be used to download a file directly from the blob store. If unsupported, returns an empty string with no error.
+	GenerateDownloadURL(ctx context.Context, key Key, opts DownloadURLOptions) (string, error)
 }