ManageIQ/miq_bot

module PullRequestMonitorHandlers
  class MergeTargetTitler
    include Sidekiq::Worker
    sidekiq_options :queue => :miq_bot

    include BranchWorkerMixin

    def perform(branch_id)
      return unless find_branch(branch_id, :pr)

      process_branch
    end

    private

    def process_branch
      apply_title if merge_target != "master" && !already_titled?
    end

    def already_titled?
      pr_title_tags.map(&:downcase).include?(merge_target.downcase)
    end

    def apply_title
      logger.info("Updating PR #{pr_number} with title change for merge target #{merge_target}.")
      GithubService.update_pull_request(fq_repo_name, pr_number, :title => new_pr_title)
    end

    def new_pr_title
      "[#{merge_target.upcase}] #{pr_title}"
    end
  end
end