mirror of https://github.com/zulip/zulip.git
81 lines
3.1 KiB
Python
81 lines
3.1 KiB
Python
from typing import Optional
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from django.db import transaction
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from django.http import HttpRequest, HttpResponse
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from django.utils.translation import gettext as _
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from zerver.lib.actions import check_add_reaction, do_remove_reaction
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from zerver.lib.emoji import emoji_name_to_emoji_code
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from zerver.lib.exceptions import JsonableError
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from zerver.lib.message import access_message
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from zerver.lib.request import REQ, has_request_variables
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from zerver.lib.response import json_success
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from zerver.models import Reaction, UserProfile
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# transaction.atomic is required since we use FOR UPDATE queries in access_message
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@transaction.atomic
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@has_request_variables
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def add_reaction(
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request: HttpRequest,
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user_profile: UserProfile,
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message_id: int,
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emoji_name: str = REQ(),
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emoji_code: Optional[str] = REQ(default=None),
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reaction_type: Optional[str] = REQ(default=None),
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) -> HttpResponse:
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check_add_reaction(user_profile, message_id, emoji_name, emoji_code, reaction_type)
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return json_success(request)
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# transaction.atomic is required since we use FOR UPDATE queries in access_message
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@transaction.atomic
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@has_request_variables
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def remove_reaction(
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request: HttpRequest,
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user_profile: UserProfile,
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message_id: int,
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emoji_name: Optional[str] = REQ(default=None),
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emoji_code: Optional[str] = REQ(default=None),
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reaction_type: str = REQ(default="unicode_emoji"),
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) -> HttpResponse:
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message, user_message = access_message(user_profile, message_id, lock_message=True)
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if emoji_code is None:
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if emoji_name is None:
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raise JsonableError(
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_(
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"At least one of the following arguments "
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"must be present: emoji_name, emoji_code"
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)
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)
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# A correct full Zulip client implementation should always
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# pass an emoji_code, because of the corner cases discussed in
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# the long block comments elsewhere in this file. However, to
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# make it easy for simple API clients to use the reactions API
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# without needing the mapping between emoji names and codes,
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# we allow instead passing the emoji_name and looking up the
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# corresponding code using the current data.
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emoji_code = emoji_name_to_emoji_code(message.sender.realm, emoji_name)[0]
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if not Reaction.objects.filter(
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user_profile=user_profile,
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message=message,
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emoji_code=emoji_code,
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reaction_type=reaction_type,
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).exists():
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raise JsonableError(_("Reaction doesn't exist."))
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# Unlike adding reactions, while deleting a reaction, we don't
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# check whether the provided (emoji_type, emoji_code) pair is
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# valid in this realm. Since there's a row in the database, we
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# know it was valid when the user added their reaction in the
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# first place, so it is safe to just remove the reaction if it
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# exists. And the (reaction_type, emoji_code) pair may no longer be
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# valid in legitimate situations (e.g. if a realm emoji was
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# deactivated by an administrator in the meantime).
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do_remove_reaction(user_profile, message, emoji_code, reaction_type)
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return json_success(request)
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