gcp.ts

import { Storage, GetSignedUrlConfig } from '@google-cloud/storage';

const { BUCKET_NAME, GCP_STORAGE_SERVICE_ACCOUNT } = process.env;

if (BUCKET_NAME == null) {
	throw new Error('BUCKET_NAME not set');
}
if (GCP_STORAGE_SERVICE_ACCOUNT == null) {
	throw new Error('GCP_STORAGE_SERVICE_ACCOUNT not set');
}

// These options will allow temporary read access to the file
export const getSignedUploadUrl = async (filename: string): Promise<string> => {
	const credentials = JSON.parse(GCP_STORAGE_SERVICE_ACCOUNT);
	const storage = new Storage({ credentials });

	const options: GetSignedUrlConfig = {
		action: 'write' as 'write',
		contentType: 'application/pdf',
		expires: Date.now() + 15 * 60 * 1000, // 15 minutes
		version: 'v4' as 'v4',
	};

	const [url] = await storage
		.bucket(BUCKET_NAME)
		.file(filename)
		.getSignedUrl(options);

	return url;
};

export const getSignedReadUrl = async (filename: string): Promise<string> => {
	const credentials = JSON.parse(GCP_STORAGE_SERVICE_ACCOUNT);
	const storage = new Storage({ credentials });

	const options: GetSignedUrlConfig = {
		action: 'read' as 'read',
		expires: Date.now() + 24 * 60 * 60 * 1000, // 7 days
		version: 'v4' as 'v4',
	};

	const [url] = await storage
		.bucket(BUCKET_NAME)
		.file(filename)
		.getSignedUrl(options);

	return url;
};