discourse/plugins/chat/app/services/lookup_thread.rb

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# frozen_string_literal: true
module Chat
module Service
# Finds a thread within a channel. The thread_id and channel_id must
# match. For now we do not want to allow fetching threads if the
# enable_experimental_chat_threaded_discussions hidden site setting
# is not turned on, and the channel must specifically have threading
# enabled.
#
# @example
# Chat::Service::LookupThread.call(thread_id: 88, channel_id: 2, guardian: guardian)
#
class LookupThread
include Base
# @!method call(thread_id:, channel_id:, guardian:)
# @param [Integer] thread_id
# @param [Integer] channel_id
# @param [Guardian] guardian
# @return [Chat::Service::Base::Context]
policy :threaded_discussions_enabled
contract
model :thread, :fetch_thread
policy :invalid_access
policy :threading_enabled_for_channel
# @!visibility private
class Contract
attribute :thread_id, :integer
attribute :channel_id, :integer
validates :thread_id, :channel_id, presence: true
end
private
def threaded_discussions_enabled
SiteSetting.enable_experimental_chat_threaded_discussions
end
def fetch_thread(contract:, **)
ChatThread.includes(
:channel,
original_message_user: :user_status,
original_message: :chat_webhook_event,
).find_by(id: contract.thread_id, channel_id: contract.channel_id)
end
def invalid_access(guardian:, thread:, **)
guardian.can_preview_chat_channel?(thread.channel)
end
def threading_enabled_for_channel(thread:, **)
thread.channel.threading_enabled
end
end
end
end