add #available_locales to I18n and I18n::SimpleBackend, flatten translations load_path when loading translations [#1714 state:resolved]

Signed-off-by: Joshua Peek <josh@joshpeek.com>

activesupport/lib/active_support/vendor/i18n-0.1.1/lib/i18n.rb

@@ -45,6 +45,11 @@ module I18n
       Thread.current[:locale] = locale
     end
 
+    # Returns an array of locales for which translations are available
+    def available_locales
+      backend.available_locales
+    end
+
     # Sets the exception handler.
     def exception_handler=(exception_handler)
       @@exception_handler = exception_handler

activesupport/lib/active_support/vendor/i18n-0.1.1/lib/i18n/backend/simple.rb

@@ -69,6 +69,12 @@ module I18n
         @initialized ||= false
       end
 
+      # Returns an array of locales for which translations are available
+      def available_locales
+        init_translations unless initialized?
+        translations.keys
+      end
+
       def reload!
         @initialized = false
         @translations = nil
@@ -76,7 +82,7 @@ module I18n
 
       protected
         def init_translations
-          load_translations(*I18n.load_path)
+          load_translations(*I18n.load_path.flatten)
           @initialized = true
         end
 

activesupport/lib/active_support/vendor/i18n-0.1.1/test/simple_backend_test.rb

@@ -124,6 +124,16 @@ class I18nSimpleBackendTranslationsTest < Test::Unit::TestCase
   end
 end
 
+class I18nSimpleBackendAvailableLocalesTest < Test::Unit::TestCase
+  def test_available_locales
+    @backend = I18n::Backend::Simple.new
+    @backend.store_translations 'de', :foo => 'bar'
+    @backend.store_translations 'en', :foo => 'foo'
+
+    assert_equal ['de', 'en'], @backend.available_locales.map{|locale| locale.to_s }.sort
+  end
+end
+
 class I18nSimpleBackendTranslateTest < Test::Unit::TestCase
   include I18nSimpleBackendTestSetup
 
@@ -472,6 +482,18 @@ class I18nSimpleBackendLoadTranslationsTest < Test::Unit::TestCase
   end
 end
 
+class I18nSimpleBackendLoadPathTest < Test::Unit::TestCase
+  include I18nSimpleBackendTestSetup
+
+  def test_nested_load_paths_do_not_break_locale_loading
+    @backend = I18n::Backend::Simple.new
+    I18n.load_path = [[File.dirname(__FILE__) + '/locale/en.yml']]
+    assert_nil backend_get_translations
+    assert_nothing_raised { @backend.send :init_translations }
+    assert_not_nil backend_get_translations
+  end
+end
+
 class I18nSimpleBackendReloadTranslationsTest < Test::Unit::TestCase
   include I18nSimpleBackendTestSetup