[openstreetmap/openstreetmap-website] Provide a truncated view of recent diaries (PR #5121)

[David Tsiklauri]

@nertc commented on this pull request.



> @@ -65,6 +65,32 @@ def description
 
     protected
 
+    def truncate_html(html_doc, max_length = nil, empty_tag_length = 1000)
+      return html_doc if max_length.nil?
+
+      doc = Nokogiri::HTML::DocumentFragment.parse(html_doc)
+      accumulated_length = 0
+      last_child = nil
+
+      doc.traverse do |node|

Added `keep_or_discards` array which contains tag names which will be either completely kept or completely discarded.

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