add file download for tracking page

src/app/actions/trackingActions.ts

@@ -238,4 +238,27 @@ export async function fetchTrackingStats() {
 	} catch (error) {
 		return null;
 	}
+}
+
+export async function downloadTrackingFile(fileId: string, fileName?: string) {
+	try {
+		const response = await fetch(`${API_BASE_URL}/api/v1/files/public-download/${fileId}`, {
+			method: 'GET'
+		});
+
+		if (!response.ok) {
+			throw 'failed-to-download-file';
+		}
+
+		const arrayBuffer = await response.arrayBuffer()
+		const base64 = Buffer.from(arrayBuffer).toString('base64')
+
+		return {
+			data: base64,
+			contentType: response.headers.get('content-type') || 'application/octet-stream',
+			fileName: fileName ? fileName : 'fileName'
+		}
+	} catch (error) {
+		return null;
+	}
 }