Added sanitize_as_filename method to the String class.

lib/ruby_extensions.rb

@@ -20,8 +20,19 @@ def geometric_mean
 
 # String extensions
 String.class_eval do
+
   def to_slug
-    # Unidecode is missing some hyphen conversions
-    self.gsub(/[-‐‒–—―⁃−­]/, '-').to_ascii.downcase.gsub(/[^a-z0-9 ]/, ' ').strip.gsub(/[ ]+/, '-')
+    self.transliterate.downcase.gsub(/[^a-z0-9 ]/, ' ').strip.gsub(/[ ]+/, '-')
+  end
+
+  # differs from the 'to_slug' method in that it leaves in the dot '.' character and removes Windows' crust from paths (removes "C:\Temp\" from "C:\Temp\mieczyslaw.jpg")
+  def sanitize_as_filename
+    self.gsub(/^.*(\\|\/)/, '').transliterate.downcase.gsub(/[^a-z0-9\. ]/, ' ').strip.gsub(/[ ]+/, '-')
   end
+
+  def transliterate
+    # Unidecode gem is missing some hyphen transliterations
+    self.gsub(/[-‐‒–—―⁃−­]/, '-').to_ascii
+  end
+
 end

test/ruby_extensions_test.rb

@@ -4,9 +4,9 @@
 class RubyExtensionsTest < Test::Unit::TestCase
 
   def test_object_extensions
-    assert "".respond_to?(:try)
-    assert_nil "".try(:non_existing_method)
-    assert_equal "a ".try(:strip), "a"
+    assert ''.respond_to?(:try)
+    assert_nil ''.try(:non_existing_method)
+    assert_equal 'a '.try(:strip), 'a'
   end
 
   def test_array_extensions
@@ -18,31 +18,34 @@ def test_array_extensions
   end
 
   def test_string_extensions
-    assert "".respond_to?(:to_slug)
+    assert ''.respond_to?(:to_slug)
 
     # to_slug: Polish accented characters
-    assert_equal "ęóąśłżźćń ĘÓĄŚŁŻŹĆŃ".to_slug, "eoaslzzcn-eoaslzzcn"
+    assert_equal 'ęóąśłżźćń ĘÓĄŚŁŻŹĆŃ'.to_slug, 'eoaslzzcn-eoaslzzcn'
 
     # to_slug: Kaszubian accented characters
-    assert_equal "ÃãÉéËëÒòÔôÙù".to_slug, "aaeeeeoooouu"
+    assert_equal 'ÃãÉéËëÒòÔôÙù'.to_slug, 'aaeeeeoooouu'
 
     # to_slug: Iñtërnâtiônàlizætiøn
-    assert_equal "Iñtërnâtiônàlizætiøn".to_slug, "internationalizaetion"
+    assert_equal 'Iñtërnâtiônàlizætiøn'.to_slug, 'internationalizaetion'
 
     # to_slug: other accented characters
-    assert_equal "āčēģīķļņū".to_slug, 'acegiklnu'
+    assert_equal 'āčēģīķļņū'.to_slug, 'acegiklnu'
     assert_equal '中文測試'.to_slug, 'zhong-wen-ce-shi'
     assert_equal 'fööbär'.to_slug, 'foobar'
 
     # to_slug: hyphens
-    assert_equal "a-b‐c‒d–e—f―g⁃h−i­j".to_slug, "a-b-c-d-e-f-g-h-i-j"
+    assert_equal 'a-b‐c‒d–e—f―g⁃h−i­j'.to_slug, 'a-b-c-d-e-f-g-h-i-j'
 
     # to_slug: various
-    assert_equal '!@#$%^&*()_+[]{}|;\':",./<>?/// aaaa_bbbb \\ ?@#$?`~'.to_slug, "aaaa-bbbb"
+    assert_equal '!@#$%^&*()_+[]{}|;\':",./<>?/// aaaa_bbbb \\ ?@#$?`~'.to_slug, 'aaaa-bbbb'
     assert_equal '////// meph1sto r0x ! \\\\\\'.to_slug, 'meph1sto-r0x'
-    assert_equal "!@ To$Łódź?żółć!pójdź[]do-mnie".to_slug, "to-lodz-zolc-pojdz-do-mnie"
-    assert_equal "zAżÓłĆ_łódź-–--mą_mnĄ–kÔÔ-tęrr".to_slug, "zazolc-lodz-ma-mna-koo-terr"
-    assert_equal "Czy to był kaszëbskô horror w Żarach?".to_slug, 'czy-to-byl-kaszebsko-horror-w-zarach'
+    assert_equal '!@ To$Łódź?żółć!pójdź[]do-mnie'.to_slug, 'to-lodz-zolc-pojdz-do-mnie'
+    assert_equal 'zAżÓłĆ_łódź-–--mą_mnĄ–kÔÔ-tęrr'.to_slug, 'zazolc-lodz-ma-mna-koo-terr'
+    assert_equal 'Czy to był kaszëbskô horror w Żarach?'.to_slug, 'czy-to-byl-kaszebsko-horror-w-zarach'
+
+    # sanitize_as_filename
+    assert_equal 'C:\Temp\ęóąśłżźćń.txt'.sanitize_as_filename, 'eoaslzzcn.txt'
   end
 
 end