discourse/lib/category_badge.rb

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module CategoryBadge
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]
category_url = "#{Discourse.base_url}#{category.url}"
result = ""
result << "<a href='#{category_url}' style='background-color: ##{category.color}; font-size: 12px; padding: 2px 1px; font-weight: bold; margin: 0; width: 2px; white-space:nowrap;'>&nbsp;</a>"
unless category.parent_category_id.nil?
parent_category = Category.find_by(id: category.parent_category_id)
result << "<a href='#{category_url}' style='background-color: ##{parent_category.color}; font-size: 12px; padding: 2px 1px; font-weight: bold; margin: 0; width: 2px; white-space:nowrap;'>&nbsp;</a>"
end
result << "<a href='#{category_url}' style='font-size: 12px; font-weight: bold; margin-left: 3px; color: #222;'>#{category.name}</a>"
"<span class='badge-wrapper'>#{result}</span>"
end
end