discourse/lib/category_badge.rb

# frozen_string_literal: true

module CategoryBadge
  def self.category_stripe(color, classes)
    style = color ? "style='background-color: ##{color};'" : ""
    "<span class='#{classes}' #{style}></span>"
  end

  def self.inline_category_stripe(color, styles = "", insert_blank = false)
    "<span style='background-color: ##{color};#{styles}'>#{insert_blank ? "&nbsp;" : ""}</span>"
  end

  def self.inline_badge_wrapper_style(category)
    style =
      case (SiteSetting.category_style || :box).to_sym
      when :bar
        "line-height: 1.25; margin-right: 5px;"
      when :box
        "background-color:##{category.color}; line-height: 1.5; margin-top: 5px; margin-right: 5px;"
      when :bullet
        "line-height: 1; margin-right: 10px;"
      when :none
        ""
      end

    " style='font-size: 0.857em; white-space: nowrap; display: inline-block; position: relative; #{style}'"
  end

  def self.html_for(category, opts = nil)
    opts = opts || {}

    # If there is no category, bail
    return "" if category.blank?

    # By default hide uncategorized
    return "" if category.uncategorized? && !opts[:show_uncategorized]

    extra_classes = "#{opts[:extra_classes]} #{SiteSetting.category_style}"

    result = +""

    # parent span
    unless category.parent_category_id.nil? || opts[:hide_parent]
      parent_category = Category.find_by(id: category.parent_category_id)
      result << if opts[:inline_style]
        case (SiteSetting.category_style || :box).to_sym
        when :bar
          inline_category_stripe(
            parent_category.color,
            "display: inline-block; padding: 1px;",
            true,
          )
        when :box
          inline_category_stripe(
            parent_category.color,
            "display: inline-block; padding: 0 1px;",
            true,
          )
        when :bullet
          inline_category_stripe(
            parent_category.color,
            "display: inline-block; width: 5px; height: 10px; line-height: 1;",
          )
        when :none
          ""
        end
      else
        category_stripe(parent_category.color, "badge-category-parent-bg")
      end
    end

    # sub parent or main category span
    result << if opts[:inline_style]
      case (SiteSetting.category_style || :box).to_sym
      when :bar
        inline_category_stripe(category.color, "display: inline-block; padding: 1px;", true)
      when :box
        ""
      when :bullet
        inline_category_stripe(
          category.color,
          "display: inline-block; width: #{category.parent_category_id.nil? ? 10 : 5}px; height: 10px;",
        )
      when :none
        ""
      end
    else
      category_stripe(category.color, "badge-category-bg")
    end

    # category name
    class_names = "badge-category clear-badge"
    description = category.description_text ? "title='#{category.description_text}'" : ""
    category_url =
      opts[:absolute_url] ? "#{Discourse.base_url_no_prefix}#{category.url}" : category.url

    extra_span_classes =
      if opts[:inline_style]
        case (SiteSetting.category_style || :box).to_sym
        when :bar
          "color: #222222; padding: 3px; vertical-align: text-top; margin-top: -3px; display: inline-block;"
        when :box
          "color: ##{category.text_color}; padding: 0 5px;"
        when :bullet
          "color: #222222; vertical-align: text-top; line-height: 1; margin-left: 4px; padding-left: 2px; display: inline;"
        when :none
          ""
        end + "max-width: 150px; overflow: hidden; text-overflow: ellipsis;"
      elsif (SiteSetting.category_style).to_sym == :box
        "color: ##{category.text_color}"
      else
        ""
      end
    result << "<span style='#{extra_span_classes}' data-drop-close='true' class='#{class_names}'
                 #{description}>"

    result << ERB::Util.html_escape(category.name) << "</span>"

    result =
      "<a class='badge-wrapper #{extra_classes}' href='#{category_url}'" +
        (opts[:inline_style] ? inline_badge_wrapper_style(category) : "") + ">#{result}</a>"

    result.html_safe
  end
end