JIRA Integration comment template

Description

We have in few of our projects, where the comment section into our JIRA look a bit cluttered and we wanted to simplify it, by adding a custom comment format. Browsing the code however, I see that it's hardcoded currently into:

embedded/service/gitlab-rails/app/models/project_services/jira_service.rb

Here is the snip:

  def add_comment(data, issue)
    user_name    = data[:user][:name]
    user_url     = data[:user][:url]
    entity_name  = data[:entity][:name]
    entity_url   = data[:entity][:url]
    entity_title = data[:entity][:title]
    project_name = data[:project][:name]

    message      = "[#{user_name}|#{user_url}] mentioned this issue in [a #{entity_name} of #{project_name}|#{entity_url}]:\n'#{entity_title.chomp}'"
    link_title   = "GitLab: Mentioned on #{entity_name} - #{entity_title}"
    link_props   = build_remote_link_props(url: entity_url, title: link_title)

    unless comment_exists?(issue, message)
      send_message(issue, message, link_props)
    end
  end

Proposal

It would be great, if there is the ability to define the message section either as configuration or a custom template.

Links / references