image class with attributes

app/models/cms/image.rb

@@ -0,0 +1,48 @@
+module Cms
+  class Image
+    include ActiveModel::API
+    include ActiveModel::Conversion
+    extend  ActiveModel::Naming
+
+    @@images = {}
+
+    attr_reader :name , :type , :created_at , :updated_at
+
+    def initialize(filename)
+      puts filename
+      @name , @type = filename.split(".")
+      file = File.new(Rails.root.join(Image.root,filename))
+      @created_at = file.birthtime
+      @updated_at = file.ctime
+    end
+
+    def self.all
+      return @@images unless @@images.empty?
+      Dir[Rails.root.join Image.root + "*.*"].each do |f|
+        file = f.split("/").last
+        self.add( file )
+      end
+      @@images
+    end
+
+    #save an io with given name (without ending, that is taken from io)
+    def self.create_new(filename , io)
+      ending = io.original_filename.split("/").last.split(".").last
+      full_filename = filename + "." + ending
+      File.open(Rails.root.join(Image.root, full_filename), "wb") do |f|
+        f.write( io.read )
+      end
+      self.add( full_filename )
+    end
+
+    def self.root
+      "app/assets/images/cms/"
+    end
+
+    private
+    def self.add(filename)
+      key = filename.split(".").first
+      @@images[key] = Image.new(filename)
+    end
+  end
+end