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path: root/app/services/resource_events/change_labels_service.rb
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# frozen_string_literal: true

# This service is not used yet, it will be used for:
# https://gitlab.com/gitlab-org/gitlab-ce/issues/48483
module ResourceEvents
  class ChangeLabelsService
    attr_reader :resource, :user

    def initialize(resource, user)
      @resource, @user = resource, user
    end

    def execute(added_labels: [], removed_labels: [])
      label_hash = {
        resource_column(resource) => resource.id,
        user_id: user.id,
        created_at: Time.now
      }

      labels = added_labels.map do |label|
        label_hash.merge(label_id: label.id, action: ResourceLabelEvent.actions['add'])
      end
      labels += removed_labels.map do |label|
        label_hash.merge(label_id: label.id, action: ResourceLabelEvent.actions['remove'])
      end

      Gitlab::Database.bulk_insert(ResourceLabelEvent.table_name, labels)
    end

    private

    def resource_column(resource)
      case resource
      when Issue
        :issue_id
      when MergeRequest
        :merge_request_id
      else
        raise ArgumentError, "Unknown resource type #{resource.class.name}"
      end
    end
  end
end