discourse/app/helpers/topics_helper.rb

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module TopicsHelper
def render_topic_title(topic)
link_to(topic.title,topic.relative_url)
end
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def categories_breadcrumb(topic)
breadcrumb = []
category = topic.category
if category && !category.uncategorized?
if (parent = category.parent_category)
breadcrumb.push url: parent.url, name: parent.name
end
breadcrumb.push url: category.url, name: category.name
end
Plugin::Filter.apply(:topic_categories_breadcrumb, topic, breadcrumb)
end
end