FEATURE: normalize whitespaces in topic title/post content

lib/post_creator.rb

@@ -203,6 +203,8 @@ class PostCreator
   end
 
   def setup_post
+    @opts[:raw] = TextCleaner.normalize_whitespaces(@opts[:raw]).strip
+
     post = @topic.posts.new(raw: @opts[:raw],
                             user: @user,
                             reply_to_post_number: @opts[:reply_to_post_number])

lib/post_revisor.rb

@@ -17,7 +17,10 @@ class PostRevisor
   #  :skip_validation ask ActiveRecord to skip validations
   #
   def revise!(editor, new_raw, opts = {})
-    @editor, @new_raw, @opts = editor, new_raw, opts
+    @editor = editor
+    @opts = opts
+    @new_raw = TextCleaner.normalize_whitespaces(new_raw).strip
+
     return false unless should_revise?
     @post.acting_user = @editor
     revise_post

lib/text_cleaner.rb

@@ -36,10 +36,18 @@ class TextCleaner
     text.sub!(/\s+([!?]\s*)\z/, '\1') if opts[:remove_extraneous_space]
     # Fixes interior spaces
     text.gsub!(/ +/, ' ') if opts[:fixes_interior_spaces]
+    # Normalize whitespaces
+    text = normalize_whitespaces(text)
     # Strip whitespaces
     text.strip! if opts[:strip_whitespaces]
 
     text
   end
 
+  @@whitespaces_regexp = Regexp.new("(\u00A0|\u1680|\u180E|[\u2000-\u200B]|\u2028|\u2029|\u202F|\u205F|\u3000|\uFEFF)", "u").freeze
+
+  def self.normalize_whitespaces(text)
+    text.gsub(@@whitespaces_regexp, ' ')
+  end
+
 end