added ads

app/models/advertisement.rb

@@ -0,0 +1,66 @@
+class Advertisement < ActiveRecord::Base
+  validates_inclusion_of :ad_type, :in => %w(horizontal vertical)
+  has_many :hits, :class_name => "AdvertisementHit"
+
+  def hit!(ip_addr)
+    hits.create(:ip_addr => ip_addr)
+  end
+
+  def hit_sum(start_date, end_date)
+    hits.where(["created_at BETWEEN ? AND ?", start_date, end_date]).count
+  end
+  
+  def date_path
+    created_at.strftime("%Y%m%d")
+  end
+  
+  def image_url
+    "/images/ads-#{date_path}/#{file_name}"
+  end
+
+  def image_path
+    "#{Rails.root}/public/#{image_url}"
+  end
+  
+  def file=(f)
+    if f.size > 0
+      self.created_at ||= Time.now
+      self.file_name = f.original_filename
+      FileUtils.mkdir_p(File.dirname(image_path))
+
+      if f.local_path
+        FileUtils.cp(f.local_path, image_path)
+      else
+        File.open(image_path, 'wb') {|nf| nf.write(f.read)}
+      end
+
+      File.chmod(0644, image_path)
+    
+      image_size = ImageSize.new(File.open(image_path, "rb"))
+      self.width = image_size.get_width
+      self.height = image_size.get_height
+    end
+  end
+  
+  def preview_width
+    if width > 200 || height > 200
+      if width < height
+        ratio = 200.0 / height
+        return (width * ratio).to_i
+      else
+        return 200
+      end
+    end      
+  end
+  
+  def preview_height
+    if width > 200 || height > 200
+      if height < width
+        ratio = 200.0 / width
+        return (height * ratio)
+      else
+        return 200
+      end
+    end      
+  end
+end

app/models/advertisement_hit.rb

@@ -0,0 +1,3 @@
+class AdvertisementHit < ActiveRecord::Base
+  belongs_to :advertisement
+end