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96 lines
3.5 KiB
Python
96 lines
3.5 KiB
Python
import logging
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from typing import Any, Dict, List
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from zerver.lib.markdown import MessageRenderingResult
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from zerver.lib.upload import claim_attachment, delete_message_image
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from zerver.models import (
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Attachment,
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Message,
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Stream,
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UserProfile,
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get_old_unclaimed_attachments,
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validate_attachment_request,
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)
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from zerver.tornado.django_api import send_event
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def notify_attachment_update(
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user_profile: UserProfile, op: str, attachment_dict: Dict[str, Any]
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) -> None:
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event = {
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"type": "attachment",
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"op": op,
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"attachment": attachment_dict,
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"upload_space_used": user_profile.realm.currently_used_upload_space_bytes(),
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}
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send_event(user_profile.realm, event, [user_profile.id])
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def do_claim_attachments(message: Message, potential_path_ids: List[str]) -> bool:
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claimed = False
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for path_id in potential_path_ids:
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user_profile = message.sender
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is_message_realm_public = False
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is_message_web_public = False
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if message.is_stream_message():
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stream = Stream.objects.get(id=message.recipient.type_id)
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is_message_realm_public = stream.is_public()
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is_message_web_public = stream.is_web_public
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if not validate_attachment_request(user_profile, path_id):
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# Technically, there are 2 cases here:
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# * The user put something in their message that has the form
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# of an upload, but doesn't correspond to a file that doesn't
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# exist. validate_attachment_request will return None.
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# * The user is trying to send a link to a file they don't have permission to
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# access themselves. validate_attachment_request will return False.
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#
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# Either case is unusual and suggests a UI bug that got
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# the user in this situation, so we log in these cases.
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logging.warning(
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"User %s tried to share upload %s in message %s, but lacks permission",
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user_profile.id,
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path_id,
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message.id,
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)
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continue
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claimed = True
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attachment = claim_attachment(
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user_profile, path_id, message, is_message_realm_public, is_message_web_public
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)
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notify_attachment_update(user_profile, "update", attachment.to_dict())
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return claimed
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def do_delete_old_unclaimed_attachments(weeks_ago: int) -> None:
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old_unclaimed_attachments = get_old_unclaimed_attachments(weeks_ago)
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for attachment in old_unclaimed_attachments:
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delete_message_image(attachment.path_id)
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attachment.delete()
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def check_attachment_reference_change(
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message: Message, rendering_result: MessageRenderingResult
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) -> bool:
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# For a unsaved message edit (message.* has been updated, but not
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# saved to the database), adjusts Attachment data to correspond to
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# the new content.
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prev_attachments = {a.path_id for a in message.attachment_set.all()}
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new_attachments = set(rendering_result.potential_attachment_path_ids)
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if new_attachments == prev_attachments:
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return bool(prev_attachments)
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to_remove = list(prev_attachments - new_attachments)
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if len(to_remove) > 0:
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attachments_to_update = Attachment.objects.filter(path_id__in=to_remove).select_for_update()
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message.attachment_set.remove(*attachments_to_update)
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to_add = list(new_attachments - prev_attachments)
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if len(to_add) > 0:
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do_claim_attachments(message, to_add)
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return message.attachment_set.exists()
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