A collection of functions for writing, reading, updating and deleting cookies.

cookies.coffee

# Credit: https://www.w3schools.com/js/js_cookies.asp

writeCookie = (key, value, expDays = 365) ->

    if String key

        date = new Date()
        expTime = 1000 * 60 * 60 * 24 * expDays
        date.setTime date.getTime() + expTime
        expDate = date.toUTCString()

        document.cookie = key + "=" + value + "; expires=" + expDate + "; path=/"

        return true

    else

        return false

readCookie = (key) ->

    cookies = readCookies()

    if key of cookies

        return cookies[key]

    else

        return null

readCookies = ->

    cookies = {}

    for cookie in document.cookie.split ";"

        if cookie

            cookie = decodeURIComponent(cookie).split "="

            cookies[cookie[0].trim()] = cookie[1].trim()

    return cookies

updateCookie = (key, value, expDays = 365) ->

    cookie = readCookie key

    if cookie != null

        return writeCookie key, value, expDays

    else

        return false

deleteCookie = (key) ->

    cookie = readCookie key

    if cookie != null

        date = new Date()
        date.setTime date.getTime() - date.getTime()
        expDate = date.toUTCString()

        document.cookie = key + "=0; expires=" + expDate + "; path=/"

        return true

    else

        return false

deleteCookies = ->

    cookies = Object.keys readCookies()

    for cookie in cookies

        deleteCookie cookie

    return true

cookies.js

// Generated by CoffeeScript 2.7.0
// Credit: https://www.w3schools.com/js/js_cookies.asp

var deleteCookie, deleteCookies, readCookie, readCookies, updateCookie, writeCookie;

writeCookie = function(key, value, expDays = 365) {
  var date, expDate, expTime;
  if (String(key)) {
    date = new Date();
    expTime = 1000 * 60 * 60 * 24 * expDays;
    date.setTime(date.getTime() + expTime);
    expDate = date.toUTCString();
    document.cookie = key + "=" + value + "; expires=" + expDate + "; path=/";
    return true;
  } else {
    return false;
  }
};

readCookie = function(key) {
  var cookies;
  cookies = readCookies();
  if (key in cookies) {
    return cookies[key];
  } else {
    return null;
  }
};

readCookies = function() {
  var cookie, cookies, i, len, ref;
  cookies = {};
  ref = document.cookie.split(";");
  for (i = 0, len = ref.length; i < len; i++) {
    cookie = ref[i];
    if (cookie) {
      cookie = decodeURIComponent(cookie).split("=");
      cookies[cookie[0].trim()] = cookie[1].trim();
    }
  }
  return cookies;
};

updateCookie = function(key, value, expDays = 365) {
  var cookie;
  cookie = readCookie(key);
  if (cookie !== null) {
    return writeCookie(key, value, expDays);
  } else {
    return false;
  }
};

deleteCookie = function(key) {
  var cookie, date, expDate;
  cookie = readCookie(key);
  if (cookie !== null) {
    date = new Date();
    date.setTime(date.getTime() - date.getTime());
    expDate = date.toUTCString();
    document.cookie = key + "=0; expires=" + expDate + "; path=/";
    return true;
  } else {
    return false;
  }
};

deleteCookies = function() {
  var cookie, cookies, i, len;
  cookies = Object.keys(readCookies());
  for (i = 0, len = cookies.length; i < len; i++) {
    cookie = cookies[i];
    deleteCookie(cookie);
  }
  return true;
};