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create.rb « merge_requests « mutations « graphql « app - gitlab.com/gitlab-org/gitlab-foss.git - Unnamed repository; edit this file 'description' to name the repository.
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# frozen_string_literal: true

module Mutations
  module MergeRequests
    class Create < BaseMutation
      include ResolvesProject

      graphql_name 'MergeRequestCreate'

      argument :project_path, GraphQL::ID_TYPE,
               required: true,
               description: 'Project full path the merge request is associated with.'

      argument :title, GraphQL::STRING_TYPE,
               required: true,
               description: copy_field_description(Types::MergeRequestType, :title)

      argument :source_branch, GraphQL::STRING_TYPE,
               required: true,
               description: copy_field_description(Types::MergeRequestType, :source_branch)

      argument :target_branch, GraphQL::STRING_TYPE,
               required: true,
               description: copy_field_description(Types::MergeRequestType, :target_branch)

      argument :description, GraphQL::STRING_TYPE,
               required: false,
               description: copy_field_description(Types::MergeRequestType, :description)

      argument :labels, [GraphQL::STRING_TYPE],
               required: false,
               description: copy_field_description(Types::MergeRequestType, :labels)

      field :merge_request,
            Types::MergeRequestType,
            null: true,
            description: 'The merge request after mutation.'

      authorize :create_merge_request_from

      def resolve(project_path:, **attributes)
        project = authorized_find!(full_path: project_path)
        params = attributes.merge(author_id: current_user.id)

        merge_request = ::MergeRequests::CreateService.new(project, current_user, params).execute

        {
          merge_request: merge_request.valid? ? merge_request : nil,
          errors: errors_on_object(merge_request)
        }
      end

      private

      def find_object(full_path:)
        resolve_project(full_path: full_path)
      end
    end
  end
end