fix image size and crop and bg alignemnt options

app/models/merged/image.rb

@@ -32,6 +32,17 @@ module Merged
       image
     end
 
+    def scale( new_size )
+      mini = MiniMagick::Image.new( full_filename)
+      mini.resize( new_size.to_s + "%")
+      init_file_size
+    end
+
+    def crop( to_size )
+      mini = MiniMagick::Image.new(full_filename)
+      mini.crop( to_size )
+      init_file_size
+    end
     #save an io as new image. The filename is the id, type taken from io
     def self.create_new(name , tags,  io)
       original , end_ = io.original_filename.split("/").last.split(".")
@@ -79,8 +90,14 @@ module Merged
       "app/assets/images/cms"
     end
 
-    private
+    def init_file_size
+      magick_image = MiniMagick::Image.open(full_filename)
+      self.width = magick_image.width
+      self.height = magick_image.height
+      self.size = (magick_image.size/1024).to_i
+    end
 
+    private
     def asset_root
       "app/assets/images/" + image_root
     end