Function internalIntegerInput

src/lib/user-query.ts:86–127

(
		message: string,
		options: IntegerInputOptions<number | undefined> & { required: boolean },
)

}

const internalIntegerInput = async (
		message: string,
		options: IntegerInputOptions<number | undefined> & { required: boolean },
): Promise<number | undefined> => {
	const validate = (input: string): true | string => {
		if (options?.helpText && input === '?') {
			return true
		}

		if (!options.required && input === '') {
			return true
		}

		if (!input.match(/^-?\d+$/)) {
			return `"${input}" is not a valid integer`
		}

		if (!options.validate) {
			return true
		}

		return options.validate(Number(input))
	}

	// Using `inquirer`'s `number` function instead of `input` would be nice but it doesn't allow
	// us to accept `?` for help text.
	const prompt = async (): Promise<string | undefined> => await input({
		message: options.helpText ? `${message} (? for help)` : message,
		transformer: displayNoneForEmpty,
		validate,
		default: (typeof options.default === 'function' ? options.default() : options.default)?.toString(),
		required: options.required,
	})

	let entered = await prompt()
	while (options.helpText && entered === '?') {
		console.log(options.helpText)
		entered = await prompt()
	}

	return entered ? Number(entered) : undefined
}

/**
 * Prompt the user for an optional integer. The return value will always be a number that is an