Limit tag scope nesting to six components. Rewrite multiple consecutive delimiters to one (`::`, `:::`, ... => `:`).

app/services/process_hashtags_service.rb

@@ -6,12 +6,15 @@ class ProcessHashtagsService < BaseService
     records = []
 
     tags.map { |str| str.mb_chars.downcase }.uniq(&:to_s).each do |name|
+      name = name.gsub(/::+/, ':')
       component_indices = name.size.times.select {|i| name[i] == ':'}
       component_indices << name.size - 1
-      component_indices.each do |i|
-        frag = name[0..i]
+      component_indices.take(6).each_with_index do |i, nest|
+        frag = (nest != 5) ? name[0..i] : name
         tag = Tag.where(name: frag).first_or_create(name: frag)
 
+        p frag
+
         status.tags << tag
 
         next if tag.local || tag.private