jcsrb · December 22, 2011 15:02 · Dec 22, 2011
diff --git a/article_image_uploader.rb b/article_image_uploader.rb
@@ -0,0 +1,36 @@
+class ArticleImageUploader < ImageUploader
+
+  process :fix_exif_rotation
+  process :strip
+  process :convert => 'jpg'
+  process :quality => 85 # Percentage from 0 - 100
+
+  version :gallery_thumb do
+    process :resize_to_fill => Settings.images.article_images.processing.gallery_thumb #44x44
+  end
+
+  version :gallery_large do
+    process :resize_to_fill_if_larger => Settings.images.article_images.processing.gallery_large #604x300
+  end
+
+  version :side_bar do
+    process :resize_to_fill => Settings.images.article_images.processing.side_bar      #140x106
+  end
+
+  version :large_lightbox do
+    process :resize_to_limit => Settings.images.article_images.processing.large_lightbox  #1200x720
+  end
+
+  version :featured do
+    process :resize_to_fill => Settings.images.article_images.processing.featured     #303x300
+  end
+
+  version :category_list_top do
+    process :resize_to_fill => Settings.images.article_images.processing.category_list_top     #222x167
+  end
+
+  version :category_list_thumb do
+    process :resize_to_fill => Settings.images.article_images.processing.category_list_thumb     #60x45
+  end
+
+end
diff --git a/carrierwave.rb b/carrierwave.rb
@@ -0,0 +1,55 @@
+#config/initializers/carrierwave.rb
+module CarrierWave
+  module RMagick
+
+    # Rotates the image based on the EXIF Orientation
+    def fix_exif_rotation
+      manipulate! do |img|
+        img.auto_orient!
+        img = yield(img) if block_given?
+        img
+      end
+    end
+
+    # Strips out all embedded information from the image
+    def strip
+      manipulate! do |img|
+        img.strip!
+        img = yield(img) if block_given?
+        img
+      end
+    end
+
+    # Reduces the quality of the image to the percentage given
+    def quality(percentage)
+      manipulate! do |img|
+        img.write(current_path){ self.quality = percentage }
+        img = yield(img) if block_given?
+        img
+      end
+    end
+
+    def resize_to_fill_if_larger(width, height, gravity=::Magick::CenterGravity)
+      geometry = get_geometry
+      if geometry.first>width && geometry.last > height
+        manipulate! do |img|
+          img.crop_resized!(width, height, gravity)
+          img = yield(img) if block_given?
+          img
+        end
+      end
+    end
+
+    def get_geometry
+      img = ::Magick::Image::read(current_path).first
+      geometry = [ img.columns, img.rows ]
+    end
+
+    module ClassMethods
+      def resize_to_fill_if_larger(width, height, gravity=::Magick::CenterGravity)
+        process :resize_to_fill_if_larger => [width, height]
+      end
+    end
+
+  end
+end
diff --git a/image_uploader.rb b/image_uploader.rb
@@ -0,0 +1,55 @@
+class ImageUploader < CarrierWave::Uploader::Base
+
+  # Include RMagick or ImageScience support:
+  include CarrierWave::RMagick
+  # include CarrierWave::MiniMagick
+  # include CarrierWave::ImageScience
+
+  # Including support for the asset pipeline
+  # https://github.com/jnicklas/carrierwave/issues/493
+  include Sprockets::Helpers::RailsHelper
+  include Sprockets::Helpers::IsolatedHelper
+
+
+
+  # Choose what kind of storage to use for this uploader:
+  storage :file
+  # storage :fog
+
+  # Override the directory where uploaded files will be stored.
+  # This is a sensible default for uploaders that are meant to be mounted:
+  def store_dir
+     "#{CarrierWave::Uploader::Base.store_dir}/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
+  end
+
+  # Provide a default URL as a default if there hasn't been a file uploaded:
+  def default_url
+      asset_path("defaults/#{model.class.to_s.underscore}/default#{'_' if version_name.present?}#{version_name}.jpg")
+     #"/images/fallback/" + [version_name, "default.png"].compact.join('_')
+  end
+
+  # Process files as they are uploaded:
+  # process :scale => [200, 300]
+  #
+  # def scale(width, height)
+  #   # do something
+  # end
+
+  # Create different versions of your uploaded files:
+  # version :thumb do
+  #   process :scale => [50, 50]
+  # end
+
+  # Add a white list of extensions which are allowed to be uploaded.
+  # For images you might use something like this:
+   def extension_white_list
+     %w(jpg jpeg gif png bmp)
+   end
+
+  # Override the filename of the uploaded files:
+  # Avoid using model.id or version_name here, see uploader/store.rb for details.
+  # def filename
+  #   "something.jpg" if original_filename
+  # end
+
+end