image.rb in rmce_uploadr-0.0.3

- old
+ new
@@ -1,7 +1,53 @@
+# This class expects the following table attributes to be found:
+#  - +data_file_name+ (string)
+#  - +data_content_type+ (string)
+#  - +data_file_size+ (integer)
+#  - +data_updated_at+ (datetime)
+#  - +width+ (integer)
+#  - +height+ (integer)
 class RMceUploadr::Image < ActiveRecord::Base
   has_attached_file :data, :styles => { :medium => "300x300>", :thumb => "100x100#" },
                     :url => "/uploads/g/images/:id_partition/:style_:filename",
                     :default_url => "/images/rmce_uploadr_default/:style.png",
                     :storage => :filesystem,
                     :path => "public/uploads/g/images/:id_partition/:style_:filename"
+  # set in images_controller
+  # needed to calcuate original file geometry in :update_image_geometry
+  attr_accessor :tempfile
+  
+  before_save :update_image_geometry
+  
+  # Returns a string with width and height
+  # e.g. "100x50"
+  def geometry
+    return "" if width.nil? || height.nil?
+    "#{width}x#{height}"
+  end
+  
+  # Convers image size in B, Kb, Mb or Gb
+  # and returns something like "10Kb"
+  def size_in_bytes
+    case data_file_size
+    when 0..1023
+      "#{data_file_size}B"
+    when 1024..1048575
+      "#{(data_file_size / 1024.0).round}Kb"
+    when 1048576..1073741823
+      "#{(data_file_size / 1048576.0).round}Mb"
+    else
+      "#{(data_file_size / 1073741823.0).round}Gb"
+    end
+  end
+  
+  private
+  
+  def update_image_geometry
+    unless tempfile.nil?
+      begin
+       geometry = Paperclip::Geometry.from_file(tempfile)
+       self.width = geometry.width.to_i
+       self.height = geometry.height.to_i
+      rescue NotIdentifiedByImageMagickError => e; end
+    end
+  end
 end