interface.rb in usher-0.5.7

- old
+ new
@@ -1,37 +1,43 @@
+# From Extlib
+module CamelCaseMixin
+  def camel_case
+    return self if self !~ /_/ && self =~ /[A-Z]+.*/
+    split('_').map{|e| e.capitalize}.join
+  end
+end
+
+# TODO: refactoring: I suggest to use usher/interfaces/rack.rb instead of
+# usher/interface/rack_interface.rb, it will enable me to simplify this code
 class Usher
   module Interface
-    autoload :Rails2_2Interface, File.join(File.dirname(__FILE__), 'interface', 'rails2_2_interface')
-    autoload :Rails2_3Interface, File.join(File.dirname(__FILE__), 'interface', 'rails2_3_interface')
-    autoload :MerbInterface, File.join(File.dirname(__FILE__), 'interface', 'merb_interface')
-    autoload :RackInterface, File.join(File.dirname(__FILE__), 'interface', 'rack_interface')
-    autoload :EmailInterface, File.join(File.dirname(__FILE__), 'interface', 'email_interface')
-    autoload :Rails3Interface, File.join(File.dirname(__FILE__), 'interface', 'rails3_interface')
-    autoload :TextInterface, File.join(File.dirname(__FILE__), 'interface', 'text_interface')
-    
-    def self.for(type, &blk)
-      class_for(type).new(&blk)
+    # Get root directory of interfaces of path to specified interface
+    def self.interface_directory
+      File.join(File.dirname(__FILE__), "interface")
     end
-    
-    def self.class_for(type)
-      case type
-      when :rails2_2
-        Rails2_2Interface
-      when :rails2_3
-        Rails2_3Interface
-      when :merb
-        MerbInterface
-      when :rack
-        RackInterface
-      when :email
-        EmailInterface
-      when :rails3
-        Rails3Interface
-      when :text
-        TextInterface
+
+    # path to file
+    def self.interface_path(name)
+      File.join(self.interface_directory, "#{name}_interface.rb")
+    end
+
+    # Usher::Interface.for(:rack, &block)
+    def self.for(name, &block)
+      if File.exist?(self.interface_path(name))
+        require self.interface_path(name)
+        snake_cased = "#{name}_interface".extend(CamelCaseMixin)
+        Usher::Interface.const_get(snake_cased.camel_case).new(&block)
+      else
+        raise ArgumentError, "Interface #{name} doesn't exist. Choose one of: #{self.interfaces.inspect}"
       end
-      
     end
-    
-    
+
+    # Array of symbols
+    # Usher::Interface.interfaces
+    # => [:email_interface, :merb_interface, :rack_interface, :rails2_2_interface, :rails2_3_interface, :rails3_interface, :text_interface]
+    def self.interfaces
+      Dir["#{self.interface_directory}/*.rb"].map do |interface|
+        File.basename(interface).sub("_interface.rb", "").to_sym
+      end
+    end
   end
-end
\ No newline at end of file
+end