Get rid of crc32, truncate instead

Signed-off-by: Matt Strapp <matt@mattstrapp.net>

1 files changed, 33 insertions, 0 deletions

diff --git a/app/src/lib/ts/download.ts b/app/src/lib/ts/download.ts
new file mode 100644
index 0000000..a6167d7
--- /dev/null
+++ b/app/src/lib/ts/download.ts
@@ -0,0 +1,33 @@
+// Yoinked from https://web.dev/patterns/files/save-a-file/ for the polyfill
+
+export default async function saveFile(blob: ArrayBuffer, suggestedName: string | undefined) {
+	const supportsFSAccess = 'showSaveFilePicker' in window &&
+		(() => {
+			try {
+				return window.self === window.top;
+			} catch {
+				return false;
+			}
+		})();
+
+	if (supportsFSAccess) {
+		try {
+			const handle = await window.showSaveFilePicker({
+				suggestedName: suggestedName,
+			})
+			const writable = await handle.createWritable();
+			await writable.write(blob);
+			await writable.close();
+		} catch (err: unknown) {
+			// TypeScript
+			if ((err as Error)?.name !== 'AbortError') {
+				console.error(err);
+			}
+		}
+	} else {
+		const anchor = document.createElement('a');
+		anchor.download = suggestedName ?? 'truncated';
+		anchor.href = URL.createObjectURL(new Blob([blob]));
+		anchor.click();
+	}
+}
\ No newline at end of file