const guidValidator = /^[a-z0-9]{8}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{12}$/i;
/**
 * Checks if the string is a valid GUID.
 * @param source the string to check.
 * @returns unchanged string if it is a valid GUID; otherwise, undefined.
 */
export const parseGuidString = (source) => {
    if (source && guidValidator.test(source)) {
        return source;
    }
    return undefined;
};
/**
 * Generates a GUID.
 * @returns a GUID.
 */
export const createGuid = () => [gen(2), gen(1), gen(1), gen(1), gen(3)].join("-");
/**
 * Generates a empty GUID.
 * @returns a empty GUID.
 */
export const createEmptyGuid = () => "00000000-0000-0000-0000-000000000000";
/**
 * Generates a part of a GUID.
 * @param count the number of 2 byte chunks to generate.
 * @returns a part of a GUID.
 */
const gen = (count) => {
    let out = "";
    for (let i = 0; i < count; i++) {
        // eslint-disable-next-line no-bitwise
        out += (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
    }
    return out;
};
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