Angelmaneuver/unit-converter

import { Optional } from '../../utils/base/optional';

export class BaseValidator {
    public static async validateNumber(
        name:     string,
        value:    string,
        options?: { minimum?: number; maximum?: number; }
    ): Promise<string | undefined> {
        const minimum: number = Optional.ofNullable(options?.minimum).orElseNonNullable(0);
        const maximum: number = Optional.ofNullable(options?.maximum).orElseNonNullable(65555);
        const string2Number   = Number(value);

        if (0 === value.length || value.length > 0 && (isNaN(string2Number) || string2Number > maximum || string2Number <= minimum)) {
            // eslint-disable-next-line @typescript-eslint/no-unused-vars
            return new Promise<string>((resolve, reject) => {
                resolve(`Enter a number between greater than ${minimum} and ${maximum} for ${name}.`);
            });
        } else {
            return undefined;
        }
    }
}