Title slug in snippet url

app/models/snippet.rb

@@ -19,6 +19,10 @@ def description_html
     RDiscount.new(description, :filter_html, :safelink, :no_pseudo_protocols, :smart, :autolink).to_html
   end
 
+  def to_param
+    "#{id} #{Transliterator.transliterate(title.to_s)}".parameterize
+  end
+
   private
 
   def self.conditions_array_for_description(args)
@@ -33,5 +37,4 @@ def self.match_operator
       else 'LIKE'
     end
   end
-
 end

lib/transliterator.rb

@@ -0,0 +1,68 @@
+# -*- encoding: utf-8 -*- 
+# Borrowed from yaroslav / russian gem
+
+module Transliterator
+  extend self
+
+  # Transliteration heavily based on rutils gem by Julian "julik" Tarkhanov and Co.
+  # <http://rutils.rubyforge.org/>
+  # Cleaned up and optimized.
+
+  LOWER_SINGLE = {
+    "і"=>"i","ґ"=>"g","ё"=>"yo","№"=>"#","є"=>"e",
+    "ї"=>"yi","а"=>"a","б"=>"b",
+    "в"=>"v","г"=>"g","д"=>"d","е"=>"e","ж"=>"zh",
+    "з"=>"z","и"=>"i","й"=>"y","к"=>"k","л"=>"l",
+    "м"=>"m","н"=>"n","о"=>"o","п"=>"p","р"=>"r",
+    "с"=>"s","т"=>"t","у"=>"u","ф"=>"f","х"=>"h",
+    "ц"=>"ts","ч"=>"ch","ш"=>"sh","щ"=>"sch","ъ"=>"'",
+    "ы"=>"y","ь"=>"","э"=>"e","ю"=>"yu","я"=>"ya",
+  }
+  LOWER_MULTI = {
+    "ье"=>"ie",
+    "ьё"=>"ie",
+  }
+
+  UPPER_SINGLE = {
+    "Ґ"=>"G","Ё"=>"YO","Є"=>"E","Ї"=>"YI","І"=>"I",
+    "А"=>"A","Б"=>"B","В"=>"V","Г"=>"G",
+    "Д"=>"D","Е"=>"E","Ж"=>"ZH","З"=>"Z","И"=>"I",
+    "Й"=>"Y","К"=>"K","Л"=>"L","М"=>"M","Н"=>"N",
+    "О"=>"O","П"=>"P","Р"=>"R","С"=>"S","Т"=>"T",
+    "У"=>"U","Ф"=>"F","Х"=>"H","Ц"=>"TS","Ч"=>"CH",
+    "Ш"=>"SH","Щ"=>"SCH","Ъ"=>"'","Ы"=>"Y","Ь"=>"",
+    "Э"=>"E","Ю"=>"YU","Я"=>"YA",
+  }
+  UPPER_MULTI = {
+    "ЬЕ"=>"IE",
+    "ЬЁ"=>"IE",
+  }
+
+  LOWER = (LOWER_SINGLE.merge(LOWER_MULTI)).freeze
+  UPPER = (UPPER_SINGLE.merge(UPPER_MULTI)).freeze
+  MULTI_KEYS = (LOWER_MULTI.merge(UPPER_MULTI)).keys.sort_by {|s| s.length}.reverse.freeze
+
+  # Transliterate a string with russian characters
+  #
+  # Возвращает строку, в которой все буквы русского алфавита заменены на похожую по звучанию латиницу
+  def transliterate(str)
+    chars = str.scan(%r{#{MULTI_KEYS.join '|'}|\w|.})
+
+    result = ""
+
+    chars.each_with_index do |char, index|
+      if UPPER.has_key?(char) && LOWER.has_key?(chars[index+1])
+        # combined case
+        result << UPPER[char].downcase.capitalize
+      elsif UPPER.has_key?(char)
+        result << UPPER[char]
+      elsif LOWER.has_key?(char)
+        result << LOWER[char]
+      else
+        result << char
+      end
+    end
+
+    result
+  end
+end

spec/models/snippet_spec.rb

@@ -39,4 +39,16 @@
       snippet.description_html.should be_nil
     end
   end
-end
+
+  describe '#to_param' do
+    it 'returns id + title' do
+      snippet = Snippet.make(:description => 'This is a test')
+      snippet.to_param.should == "#{snippet.id}-this-is-a-test"
+    end
+
+    it 'works well with russian :)' do
+      snippet = Snippet.make(:description => 'Это тест')
+      snippet.to_param.to_s.should == "#{snippet.id}-eto-test"
+    end
+  end
+end