register-no-ui.html

<script type="text/javascript">
var Services = function Services() {
  this.services = {};
  this.error = null;
  this.load();
}

Services.prototype.load = function loadServices() {
  try {
    var servicesString = localStorage.getItem('services');
  }
  catch(error) {
    console.error('There was an error, so we could not load the services from the localStorage. ', error);
    if(error.name === 'SecurityError' && error.code === 18) {
      this.error = 'A browser setting is preventing SubToMe from saving your favorite subscription tools. Open up Settings > Privacy. Then, make sure Accept cookies from sites is checked. Also, make sure Accept third-party is checked as well.';
    }
    else {
      this.error = 'We could not load your favorite subscriptions tools. ';
    }
  }
  if(servicesString) {
    try {
      this.services = JSON.parse(servicesString);
    }
    catch(error) {
      console.error('Could not parse ' + servicesString);
      this.error = 'Warning: We could not load your favorite subscriptions tools. ';
    }
  }
}

Services.prototype.save = function saveServices() {
  localStorage.setItem('services', JSON.stringify(this.services));
}

Services.prototype.register = function registerService(name, handler) {
  if(!this.services[name]) {
    this.services[name] = {
      url: decodeURIComponent(handler),
      addedOn: Date.now()
    }
    this.save();
  }
}

function getParameterByName(name) {
  name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
  var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
  results = regex.exec(location.search);
  return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}

new Services().register(getParameterByName('name'), getParameterByName('url'));

</script>