Rework the scheduletime helper to work with later admintimewidget helper code
// Override the default setting on the django admin DateTimeShortcut
// Django 2 nicely does make this overridable, but we need to
// set it up before the DateTimeShortcuts init is called by
// window.onload, so we attach it to DOMContentLoaded
//
// The names of the input fields are also a bit opaque, and
// unfornately not something we can easily pass in

document.addEventListener("DOMContentLoaded", function() {
   console.log(window.DateTimeShortcuts);
   // These are for the single admin pages
   window.DateTimeShortcuts.clockHours.end_time_1 = [];
   window.DateTimeShortcuts.clockHours.start_time_1 = [];
   for (let hour = 8; hour <= 20; hour++) {
       let verbose_name = new Date(1970, 1, 1, hour, 0, 0).strftime('%H:%M');
       window.DateTimeShortcuts.clockHours.end_time_1.push([verbose_name, hour])
       window.DateTimeShortcuts.clockHours.start_time_1.push([verbose_name, hour])
   }
   // This is for the inline options - we define 30, which is hopefully sane
   for (let inline = 0; inline < 30; inline++) {
      let name = 'form-' + inline + '-end_time_1';
      console.log('computed name: ' + name);
      window.DateTimeShortcuts.clockHours[name] = [];
      for (let hour = 8; hour <= 20; hour++) {
          let verbose_name = new Date(1970, 1, 1, hour, 0, 0).strftime('%H:%M');
          window.DateTimeShortcuts.clockHours[name].push([verbose_name, hour])
      }
   }
});

// Basic idea from Bojan Mihelac -
// http://source.mihelac.org/2010/02/19/django-time-widget-custom-time-shortcuts/

// Django imports jQuery into the admin site using noConflict(True)
// We wrap this in an anonymous function to stick to jQuery's $ idiom
// and ensure we're using the admin version of jQuery, rather than
// anything else pulled in

(function($) {
   var Schedule = {
      init: function() {
         time_format = get_format('TIME_INPUT_FORMATS')[0];
         $(".timelist").each(function(num) {
            // Clear existing list
            $( this ).empty();
            // Fill list with time values
            for (i=8; i < 20; i++) {
               var time = new Date(1970,1,1,i,0,0);
               quickElement("a", quickElement("li", this, ""),
                  time.strftime(time_format), "href",
                  "javascript:DateTimeShortcuts.handleClockQuicklink(" + num +
                  ", " + i + ");");
            }
         });
      }
   }

   // We need to be called after django's DateTimeShortcuts.init, which
   // is triggered by a load event
   $( window ).bind('load', Schedule.init);
}(django.jQuery));
