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: / var / canvas / app / graphql / mutations /
Filename : subscribe_to_discussion_topic.rb
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# frozen_string_literal: true

#
# Copyright (C) 2021 - present Instructure, Inc.
#
# This file is part of Canvas.
#
# Canvas is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, version 3 of the License.
#
# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
#

class Mutations::SubscribeToDiscussionTopic < Mutations::BaseMutation
  graphql_name "SubscribeToDiscussionTopic"

  argument :discussion_topic_id, ID, required: true, prepare: GraphQLHelpers.relay_or_legacy_id_prepare_func("DiscussionTopic")
  argument :subscribed, Boolean, required: true

  field :discussion_topic, Types::DiscussionType, null: false
  def resolve(input:)
    discussion_topic = DiscussionTopic.find(input[:discussion_topic_id])
    discussion_topic.change_subscribed_state(input[:subscribed], current_user)

    {
      discussion_topic:
    }
  rescue ActiveRecord::RecordNotFound
    raise GraphQL::ExecutionError, "not found"
  end
end