40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
from django.db.models.signals import pre_save
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from django.dispatch import receiver
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from django.shortcuts import reverse
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from django.template import Context, Template
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from .models import Message, Shift
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@receiver(pre_save, dispatch_uid="notify_shift_changed")
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def notify_shift_changed(sender, **kwargs):
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if issubclass(sender, Shift):
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instance = kwargs["instance"]
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try:
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prev = Shift.objects.get(pk=instance.id)
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except Shift.DoesNotExist:
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return
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if (
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prev.room == instance.room
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and prev.start_at == instance.start_at
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and prev.duration == instance.duration
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and prev.deleted == instance.deleted
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):
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return
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message = f"Eine deiner kontakt-Schichten hat sich geändert: https://helfen.kntkt.de{reverse('shift', kwargs={'shiftid': instance.id})}"
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if instance.deleted:
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template = Template(
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'Deine kontakt-Schicht "{{ room }}" am {{ start_at|date:"l" }} um {{ start_at|date:"H:i" }} Uhr entfällt.'
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)
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message = template.render(
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Context({"room": prev.room, "start_at": prev.start_at})
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)
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Message.objects.bulk_create(
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(
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Message(text=message, to=reg.helper)
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for reg in instance.shiftregistration_set.all()
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)
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)
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