shopware / platform

    generateCode,

    getPermutationCount,

    getRandomCharacter,

    getRandomNumber,

    getCharacters,

    getDigit

};

/**

 * Generates a new and random code with the provided string pattern.

 * Use the following placeholders to generate random characters and numbers in your code:

 * - '%s': random character

 * - '%d' - random number

 *

 * @example my-code_%s%s-%d%d

 * @param {String} pattern

 */

function generateCode(pattern) {

    let code = pattern;

    while (code.includes('%s')) {

        code = code.replace(new RegExp('%s'), getRandomCharacter());

    }

    while (code.includes('%d')) {

        code = code.replace(new RegExp('%d'), getRandomNumber());

    }

    return code;

}

/**

 * Gets the number of possible permutations of the

 * provided code pattern.

 *

 * @param {String} pattern

 */

function getPermutationCount(pattern) {

    const stringCount = (pattern.split('%s').length - 1);

    const digitCount = (pattern.split('%d').length - 1);

    // if no wildcards exist, then

    // we have at least 1 static permutation

    if (stringCount <= 0 && digitCount <= 0) {

        return 1;

    }

    // if we dont have a wildcard

    // make sure to have at least a count of * 1.

    // to avoid results of 0 when multiplying with 0.

    let stringSum = 1;

    let digitSum = 1;

    if (stringCount > 0) {

        stringSum = 52 ** stringCount;

    }

    if (digitCount > 0) {

        digitSum = 10 ** digitCount;

    }

    return (stringSum * digitSum);

}

function getRandomCharacter() {

    return getCharacters().charAt(Math.floor(Math.random() * Math.floor(getCharacters().length)));

}

function getRandomNumber() {

    return getDigit().charAt(Math.floor(Math.random() * Math.floor(getDigit().length)));

}

function getDigit() {

    return '0123456789';

}