102 lines
2.9 KiB
Python
102 lines
2.9 KiB
Python
from dataclasses import dataclass
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from django.contrib.contenttypes.models import ContentType
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from django.db import transaction
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from django.db.models import Q
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from django.utils import timezone
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from notifications.cache import invalidate_unread_summary
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from notifications.models import Notification
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from notifications.realtime import send_notifications_read_all_event
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from procurement.models import ProcurementRequest
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@dataclass(frozen=True)
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class ProcurementNotificationReadResult:
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notification_ids: list[int]
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count: int
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class ProcurementNotificationReadService:
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"""Use case for reading notifications related to a procurement request."""
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procurement_verb_filter = (
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Q(verb__startswith="procurement_")
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| Q(verb__startswith="equipment_")
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)
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def mark_request_notifications_as_read(
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self,
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*,
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user,
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procurement_request: ProcurementRequest,
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) -> ProcurementNotificationReadResult:
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queryset = self._get_unread_queryset(
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user_id=user.id,
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procurement_request=procurement_request,
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)
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notification_ids = list(queryset.values_list("id", flat=True))
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if not notification_ids:
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return ProcurementNotificationReadResult(
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notification_ids=[],
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count=0,
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)
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read_at = timezone.now()
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count = Notification.objects.filter(
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id__in=notification_ids,
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).update(
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unread=False,
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timestamp_read=read_at,
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)
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invalidate_unread_summary(user.id)
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def notify_after_commit():
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invalidate_unread_summary(user.id)
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send_notifications_read_all_event(user.id, notification_ids)
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transaction.on_commit(notify_after_commit)
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return ProcurementNotificationReadResult(
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notification_ids=notification_ids,
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count=count,
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)
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def _get_unread_queryset(
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self,
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*,
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user_id: int,
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procurement_request: ProcurementRequest,
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):
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request_content_type = ContentType.objects.get_for_model(
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ProcurementRequest,
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)
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request_id = procurement_request.id
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request_id_text = str(request_id)
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request_filter = (
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Q(data__request_id=request_id)
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| Q(data__request_id=request_id_text)
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| Q(
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target_content_type=request_content_type,
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target_object_id=request_id_text,
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)
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| Q(
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action_object_content_type=request_content_type,
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action_object_object_id=request_id_text,
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)
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)
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return (
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Notification.objects.filter(
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recipient_id=user_id,
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unread=True,
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deleted=False,
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)
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.filter(self.procurement_verb_filter)
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.filter(request_filter)
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.distinct()
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)
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