discourse/app/helpers/list_helper.rb

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module ListHelper
def page_links(topic)
posts = topic.posts_count
max_pages = 10
total_pages = (posts / TopicView.chunk_size) + (posts == TopicView.chunk_size ? 0 : 1)
return if total_pages < 2
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page = [total_pages - (max_pages + 1), 2].max
result = "("
while page <= total_pages
result << " <a href='#{topic.relative_url}?page=#{page}'>#{page}</a> "
page += 1
end
result << ")"
result.html_safe
end
end