DAddYE · December 30, 2011 22:57 · Dec 30, 2011
diff --git a/image_uploader.rb b/image_uploader.rb
@@ -0,0 +1,49 @@
+class ImageUploader < CarrierWave::Uploader::Base
+  include CarrierWave::MiniMagick
+  storage :file
+
+  def thumb(size)
+    begun_at = Time.now
+    size.gsub!(/#/, '!')
+    uploader = Class.new(self.class)
+    uploader.versions.clear
+    uploader.version_names = [size]
+    img = uploader.new
+    img.retrieve_from_store!(identifier)
+    cached = File.join(CarrierWave.root, img.url)
+    unless File.exist?(cached)
+      img.cache!(self)
+      img.send(:original_filename=, original_filename)
+      size = size.split('x').map(&:to_i)
+      resizer = case size
+                when /[!#]/ then :resize_to_fit
+                # add more like when />/ then ...
+                else :resize_to_fill
+                end
+      img.send(resizer, *size)
+      img.store!
+      logger.debug 'RESIZE', begun_at, img.store_path
+    end
+    img
+  end
+
+  def store_dir
+    'uploads'
+  end
+
+  def cache_dir
+    Padrino.root('tmp/uploads')
+  end
+
+  def extension_white_list
+    %w[jpg jpeg gif png]
+  end
+
+  def filename
+    Digest::MD5.hexdigest(original_filename) << File.extname(original_filename) if original_filename
+  end
+
+  def default_url
+    '/images/no-image.png'
+  end
+end
diff --git a/test.out b/test.out
@@ -0,0 +1,13 @@
+>> i = ImageUploader.new
+=> #<ImageUploader:0x1044314f8 @model=nil, @mounted_as=nil>
+>> i.download!('http://a1.twimg.com/profile_images/682283839/PadrinoLogo_reasonably_small.jpg')
+=> [:process!, :assign_parent_cache_id, :cache_versions!]
+>> i.store!
+=> [:store_versions!]
+>> i.url
+=> "/uploads/35c40bbe3a9170e2901165990c34a173.jpg"
+>> i.thumb('100x100').url
+  DEBUG -   RESIZE (0.1124ms) uploads/100x100_35c40bbe3a9170e2901165990c34a173.jpg
+=> "/uploads/100x100_35c40bbe3a9170e2901165990c34a173.jpg"
+>> i.thumb('100x100').url
+=> "/uploads/100x100_35c40bbe3a9170e2901165990c34a173.jpg"