from django import template
from django.utils import timezone

from events import services
from events.models import Event

register = template.Library()


@register.inclusion_tag('events/event_cards.html', takes_context=True)
def render_event_cards(context, events=None):
    if events is None:
        events = Event.objects.filter(
            published=True,
            start__gte=timezone.now() - timezone.timedelta(hours=24),
            end__gte=timezone.now()
        ).order_by('start')[:6]

    try:
        cards = [{
                'event': x,
                'current_user_registration': services.is_user_registered(
                    context['user'], x),
            } for x in events]
    except AttributeError:
        cards = [{
                'event': x,
                'current_user_registration': None
            } for x in events]

    return {'events': cards}