retrier.ts

type RetrierResponseType<DataType> =
	| {
			success: false
			data?: any
	  }
	| {
			success: true
			data: DataType
	  }

/**
 * Retry an asynchronous function.
 * @param fn Function to retry
 * @param times Amount of times to retry before giving up
 * @param determiner Function that determines whether the attempt was successfull (optional)
 */
async function retrier<ResponseType = any>(
	fn: () => Promise<ResponseType>,
	times = 3,
	determiner?: (data: ResponseType) => boolean
): Promise<RetrierResponseType<ResponseType>> {
	for (let i = 0; i < times; i++) {
		try {
			const response = await fn()

			// Fail if there is a determiner, the determiner fails, and we have no more times left to try
			if (!!determiner && !determiner(response) && i + 1 === times) {
				console.error(response)

				return {
					success: false,
					data: response,
				}
			}

			return {
				success: true,
				data: response,
			}
		} catch (error) {
			if (i + 1 === times) {
        console.error(error)

				return {
					success: false,
					data: error,
				}
			}
		}
	}

	return {
		success: false,
	}
}

export default retrier