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64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
from django.db import transaction
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from django.utils.translation import gettext as _
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from zerver.lib.exceptions import JsonableError
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from zerver.models import Realm, SubMessage, UserMessage
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from zerver.tornado.django_api import send_event
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def verify_submessage_sender(
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*,
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message_id: int,
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message_sender_id: int,
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submessage_sender_id: int,
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) -> None:
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"""Even though our submessage architecture is geared toward
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collaboration among all message readers, we still enforce
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the the first person to attach a submessage to the message
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must be the original sender of the message.
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"""
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if message_sender_id == submessage_sender_id:
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return
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if SubMessage.objects.filter(
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message_id=message_id,
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sender_id=message_sender_id,
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).exists():
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return
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raise JsonableError(_("You cannot attach a submessage to this message."))
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def do_add_submessage(
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realm: Realm,
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sender_id: int,
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message_id: int,
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msg_type: str,
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content: str,
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) -> None:
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"""Should be called while holding a SELECT FOR UPDATE lock
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(e.g. via access_message(..., lock_message=True)) on the
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Message row, to prevent race conditions.
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"""
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submessage = SubMessage(
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sender_id=sender_id,
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message_id=message_id,
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msg_type=msg_type,
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content=content,
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)
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submessage.save()
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event = dict(
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type="submessage",
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msg_type=msg_type,
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message_id=message_id,
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submessage_id=submessage.id,
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sender_id=sender_id,
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content=content,
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)
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ums = UserMessage.objects.filter(message_id=message_id)
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target_user_ids = [um.user_profile_id for um in ums]
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transaction.on_commit(lambda: send_event(realm, event, target_user_ids))
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