"""باطل‌کردنِ کشِ لیستِ پلن‌ها با هر تغییرِ Plan (از ادمین)."""
from django.core.cache import cache
from django.db.models.signals import post_delete, post_save
from django.dispatch import receiver

from .models import Plan

PLANS_CACHE_KEY = 'subscription:plans:v1'  # هم‌تراز با subscription/views.py


@receiver(post_save, sender=Plan, dispatch_uid='subscription_invalidate_plans_cache_on_save')
@receiver(post_delete, sender=Plan, dispatch_uid='subscription_invalidate_plans_cache_on_delete')
def _invalidate_plans_cache(sender, **kwargs):
    cache.delete(PLANS_CACHE_KEY)