BikeBikeBike/app/uploaders/avatar_uploader.rb

# encoding: utf-8
require 'carrierwave/processing/mini_magick'

class AvatarUploader < CarrierWave::Uploader::Base

  include CarrierWave::ImageOptimizer
  include CarrierWave::MiniMagick

  # Include RMagick or MiniMagick support:
  # include CarrierWave::RMagick
  # include CarrierWave::MiniMagick

  # Choose what kind of storage to use for this uploader:

  storage :file
  process :optimize

  @@sizes = {:thumb => [120, 120], :icon => [48, 48], :preview => [360, 120], :normal => [512, 512]}
  # 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
    "uploads/#{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
  #  # For Rails 3.1+ asset pipeline compatibility:
  #  # ActionController::Base.helpers.asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))
  #
    #"/images/fallback/" + [version_name, "default.png"].compact.join('_')
  # "http://placehold.it/" + (@@sizes[version_name] || [300, 300]).join('x')
  #end

  # Process files as they are uploaded:
  # process :scale => [200, 300]
  #
  #def scale(width, height)
  #end

  # Create different versions of your uploaded files:
  version :thumb do
    process :resize_to_fill => @@sizes[:thumb]
  end

  version :icon do
    process :resize_to_fill => @@sizes[:icon]
  end

  version :preview do
    process :resize_to_fit => @@sizes[:preview]
  end

  version :normal do
    process :resize_to_fit => @@sizes[:normal]
  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)
  # 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

  def image
    @image ||= MiniMagick::Image.open(file.path)
  end

  def is_landscape?
    image['width'] > (image['height'] * 1.25)
  end

  #def recreate_versions!(*versions)
  # if !current_path.nil?
  #   current_path = "'" + (current_path || '') + "'"
  # end
  # super(*versions)
  #end

# def manipulate!
#   cache_stored_file! if !cached?
#   image = ::MiniMagick::Image.open(current_path)
#
#   begin
#     image.format(@format.to_s.downcase) if @format
#     image = yield(image)
#     image.write(current_path)
#     image.run_command("identify", '"' + current_path + '"')
#   ensure
#     image.destroy!
#   end
# rescue ::MiniMagick::Error, ::MiniMagick::Invalid => e
#   default = I18n.translate(:"errors.messages.mini_magick_processing_error", :e => e, :locale => :en)
#   message = I18n.translate(:"errors.messages.mini_magick_processing_error", :e => e, :default => default)
#   raise CarrierWave::ProcessingError, message
# end

end