Go shopping

gistfile1.txt

function goShopping(notification)
{
    var notif = new Notification(notification);
    notif.listCardWasAddedTo("Info");
  
    if(notif.card().name() != "Go Shopping")
      throw new InvalidDataException("Card created was not Go Shopping Card");
  
    var quants = {};
    var units  = {};
    var all_cards = notif.board().cards();
  
    notif.board().list("Ingredients").cards().each(function(card)
    {
        var num = all_cards.clone().transform(function(loop)
        {
            try
            {
                loop.label("Leftovers");
                return false;
            }
            
            catch(e)
            {
                if((loop.name() == card.name()) && (loop.currentList().name() != "Ingredients"))
                    return loop;
                else
                    return false;
            }

        }).length();

        if(num)
        {
            card.checklist("Ingredients").items().each(function(item)
            {
                var split    = item.name().split(" x ");
                
                if(
                   (split.length > 1) &&
                   (quantity = new RegExp("([0-9.]+)([ a-zA-Z]*)").exec(split[1].trim()))
                  )
                {
                    var q        = parseFloat(quantity[1].trim()*num);
                    var unit     = quantity[2].trim();
                    units[split[0]] = unit;
                    
                    if(!quants[split[0]])
                        quants[split[0]] = 0;
    
                    quants[split[0]] += q;
                }
            });
        }
    });

    var shop = new Array();
    notif.board().list("Info").card("Shopping List").addChecklist("Shopping List",function(list)
    {
        for(var key in quants)
            list.addItem(key+" x "+quants[key]+units[key]);
    });

    var label_id = new Trellinator().board(notif.member().name()).label("Shopping List Item").data.id;
    var cl = notif.board().list("Info").card("Shopping List").checklist("Shopping List");
    cl.setName(notif.member().name()+" going shopping "+Trellinator.now().butlerDefaultDate());
    cl.convertIntoLinkedCards(new Trellinator().board(notif.member().name()).findOrCreateList("Shopping"),{idLabels: label_id});
    notif.card().archive();
}