Contents

module CarrierWave
  module Meta
    extend ActiveSupport::Concern

    included do
      include CarrierWave::ModelDelegateAttribute
      include CarrierWave::MimeTypes

      set_content_type(true)

      after :retrieve_from_cache, :set_content_type
      after :retrieve_from_cache, :call_store_meta
      after :retrieve_from_store, :set_content_type
      after :retrieve_from_store, :call_store_meta

      model_delegate_attribute :content_type, ''
      model_delegate_attribute :file_size, 0
      model_delegate_attribute :image_size, []
      model_delegate_attribute :width, 0
      model_delegate_attribute :height, 0
    end

    def store_meta
      if self.file.present?
        dimensions = get_dimensions
        width, height = dimensions
        self.content_type = self.file.content_type
        self.file_size = self.file.size
        self.image_size = dimensions
        self.width = width
        self.height = height
      end
    end

    def set_content_type(file = nil)
      set_content_type(true)
    end

    def image_size_s
      image_size.join('x')
    end

    private
    def call_store_meta(file = nil)
      # Re-retrieve metadata for a file only if model is not present OR model is not saved.
      store_meta if self.model.nil? || (self.model.respond_to?(:new_record?) && self.model.new_record?)
    end

    def get_dimensions
      [].tap do |size|
        if self.file.content_type =~ /image/
          manipulate! do |img|
            if defined?(::Magick::Image) && img.is_a?(::Magick::Image)
              size << img.columns
              size << img.rows
            elsif defined?(::MiniMagick::Image) && img.is_a?(::MiniMagick::Image)
              size << img["width"]
              size << img["height"]
            else
              raise "Only RMagick & MiniMagick are supported yet. Fork and update it."
            end
            img
          end
        end
      end
    rescue CarrierWave::ProcessingError
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
carrierwave-meta-0.0.4	lib/carrierwave-meta/meta.rb