app/services/notes/create_service.rb


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module Notes
  class CreateService < BaseService
    def execute
      note = project.notes.new(params)
      note.author = current_user
      note.system = false

      if note.award_emoji?
        noteable = note.noteable
        if noteable.user_can_award?(current_user, note.award_emoji_name)
          todo_service.new_award_emoji(noteable, current_user)
          return noteable.create_award_emoji(note.award_emoji_name, current_user)
        end
      end

      # We execute commands (extracted from `params[:note]`) on the noteable
      # **before** we save the note because if the note consists of commands
      # only, there is no need be create a note!
      slash_commands_service = SlashCommandsService.new(project, current_user)

      if slash_commands_service.supported?(note)
        content, command_params = slash_commands_service.extract_commands(note)

        only_commands = content.empty?

        note.note = content
      end

      note.run_after_commit do
        # Finish the harder work in the background
        NewNoteWorker.perform_async(note.id)
      end

      if !only_commands && note.save
        todo_service.new_note(note, current_user)
      end

      if command_params.present?
        slash_commands_service.execute(command_params, note)

        # We must add the error after we call #save because errors are reset
        # when #save is called
        if only_commands
          note.errors.add(:commands_only, 'Your commands have been executed!')
        end

        note.commands_changes = command_params.keys
      end

      note
    end
  end
end