@technobuddha/library/cookie/cookie.ts

A large library of useful functions

/* eslint-disable unicorn/no-document-cookie */
import formatDate from '../formatDate';

let yummy: Record<string, string>;

/**
 * Initialize the cookie system with the browsers cookies
 * Parse a string containing cookies for use by other cookie method
 *
 * @param input string to be decoded
 */
export function init(input = document.cookie): void {
    if(typeof yummy === 'undefined') {
        yummy =  Object.fromEntries(input.split(';').map(
            cookie => cookie.split('=').map(crumb => decodeURIComponent(crumb.trim()))
        ));
    }
}

/**
 * Get the value of a cookie
 *
 * @param name name of a cookie
 */
export function get(name: string): string | undefined {
    init();
    return yummy[name];
}

/**
 * Get the names of all cookies
 *
 * @returns array of cookie names
 */
export function names(): string[] {
    init();
    return Object.keys(yummy);
}

/**
 * Add or update a cookie
 *
 * @param name name of the cookie
 * @param value value of the cookie
 * @param expires Expiration date
 */
export function add(name: string, value: string, expires?: string | Date): void {
    init();
    let cookie = `${name}=${encodeURIComponent(value)}; Path=/`;

    if(expires)
        cookie += `; Expires=${formatDate(new Date(expires), 'cookie', { UTC: true })}`;
    document.cookie = cookie;
    yummy[name] = value;
}

/**
 * Delete a cookie
 *
 * @param name
 */
export function del(name: string): void {
    init();
    document.cookie = `${name}=; Path=/; Expires=Thu, 01 Jan 1970 00:00:01 GMT`;
    delete yummy[name];
}

export default { init, get, names, add, del };