latex_resumes/app/admin/users_admin.rb

Trestle.resource(:users) do
  menu do
    item :users, icon: "fa fa-user", priority: 1
  end

  form do |item|
    concat Trestle::Form::Automatic.new(admin).render(self, item)
    
    text_area :objective
  end

  # Customize the table columns shown on the index view.
  table do
    column :name
    column :created_at, align: :center
    actions do |toolbar, instance, admin|
      toolbar.edit if admin && admin.actions.include?(:edit)
      toolbar.delete if admin && admin.actions.include?(:destroy)
      toolbar.link 'CV', instance, action: :generate, method: :get, style: :primary, icon: "fa fa-file-pdf", target: "_blank"
      toolbar.link 'CLS', instance, action: :generate_cls, method: :get, style: :secondary, icon: "fa", target: "_blank"
      toolbar.link 'JSON', instance, action: :generate_json, method: :get, style: :secondary, icon: "fa", target: "_blank"
    end
  end

  controller do
    def generate
      tex_content = generate_tex
      destination_dir = "#{Rails.root}/app/views/templates/awesome"
      `cd #{destination_dir} && make clean`
      File.open("#{destination_dir}/resume.tex", "w") do |f|
        f << tex_content
      end
      `cd #{destination_dir} && make resume.pdf`
      render file: "#{destination_dir}/resume.pdf", layout: false
    end

    def generate_cls
      tex_content = generate_tex
      destination_dir = "#{Rails.root}/app/views/templates/awesome"
      File.open("#{destination_dir}/resume.tex", "w") do |f|
        f << tex_content
      end
      render file: "#{destination_dir}/resume.tex", layout: false
    end

    def generate_json
      generate_json_resume
    end

    def generate_json_resume
      user = admin.find_instance(params)

      split_list = lambda do |value|
        value.to_s.split(/[;,]/).map { |item| item.strip }.reject(&:blank?)
      end

      parse_period = lambda do |period|
        years = period.to_s.scan(/\b(19\d{2}|20\d{2})\b/).flatten
        return [nil, nil] if years.empty?
        [years[0], years[1]]
      end

      normalize_url = lambda do |value|
        return nil if value.blank?
        value.match?(/\Ahttps?:\/\//) ? value : "https://#{value}"
      end

      profile_from = lambda do |value, network, base_url|
        return nil if value.blank?

        if value.include?("/") || value.include?(".")
          url = normalize_url.call(value)
          username = url.to_s.split("/").last&.delete_prefix("@")
        else
          username = value.delete_prefix("@")
          url = base_url.present? ? "#{base_url}/#{username}" : nil
        end

        profile = { "network" => network }
        profile["username"] = username if username.present?
        profile["url"] = url if url.present?
        profile
      end

      basics = {
        "name" => user.name,
        "label" => user.title,
        "email" => user.email,
        "phone" => user.phone,
        "summary" => user.objective
      }.compact

      if user.address.present?
        basics["location"] = { "address" => user.address }
      end

      primary_url = user.other_page_url.presence || user.linkedin.presence || user.github.presence
      basics["url"] = normalize_url.call(primary_url) if primary_url.present?

      profiles = []
      profiles << profile_from.call(user.linkedin, "LinkedIn", "https://www.linkedin.com/in")
      profiles << profile_from.call(user.github, "GitHub", "https://github.com")
      profiles << profile_from.call(user.other_page_url, "Website", nil)
      profiles.compact!
      basics["profiles"] = profiles if profiles.any?

      work = user.work_experiences.active.map do |work_entry|
        start_date, end_date = parse_period.call(work_entry.period)
        highlights = split_list.call(work_entry.items_csv)
        technologies = split_list.call(work_entry.technologies)
        highlights << "Technologies: #{technologies.join(', ')}" if technologies.any?

        summary = work_entry.achivements.presence
        summary = work_entry.period.presence if summary.blank? && start_date.blank? && end_date.blank?

        entry = {
          "name" => work_entry.employer,
          "position" => work_entry.title
        }.compact
        entry["summary"] = summary if summary.present?
        entry["highlights"] = highlights if highlights.any?
        entry["startDate"] = start_date if start_date.present?
        entry["endDate"] = end_date if end_date.present?
        if entry["startDate"].blank? && entry["endDate"].blank? && work_entry.reference_date.present?
          entry["endDate"] = work_entry.reference_date.iso8601
        end
        entry
      end

      education = user.education_entries.active.map do |education_entry|
        start_date, end_date = parse_period.call(education_entry.period)

        study_type = education_entry.title
        area = nil
        if study_type.present? && study_type.match?(/\s+in\s+/i)
          study_type, area = study_type.split(/\s+in\s+/i, 2)
        end

        courses = split_list.call(education_entry.items_csv)

        entry = { "institution" => education_entry.institution }.compact
        entry["studyType"] = study_type if study_type.present?
        entry["area"] = area if area.present?
        entry["courses"] = courses if courses.any?
        entry["startDate"] = start_date if start_date.present?
        entry["endDate"] = end_date if end_date.present?
        if entry["startDate"].blank? && entry["endDate"].blank? && education_entry.reference_date.present?
          entry["endDate"] = education_entry.reference_date.iso8601
        end
        entry
      end

      skills = user.skills.active.map do |skill|
        keywords = split_list.call(skill.detail)
        entry = { "name" => skill.title }.compact
        if keywords.any?
          entry["keywords"] = keywords
        elsif skill.detail.present?
          entry["level"] = skill.detail
        end
        entry
      end

      resume = { "basics" => basics }
      resume["work"] = work if work.any?
      resume["education"] = education if education.any?
      resume["skills"] = skills if skills.any?

      render json: resume, layout: false
    end

    def generate_tex(template: "resume")
      user = admin.find_instance(params)
      ac = ActionController::Base.new()
      ac.render_to_string(layout: false, template: "templates/awesome/#{template}", locals: { "@user": user } )
    end
  end

  routes do
    get :generate, on: :member
    get :generate_cls, on: :member
    get :generate_json, on: :member
  end
end