gistfile1.txt

class Asset < ActiveRecord::Base

	acts_as_paranoid

	def upload_to_s3(file)
		if file
			#set content_type
			content_type = determine_content_type(file)
			self.content_type = content_type

			#set filename
			prefix = "/audio/" if content_type == "audio"
			prefix = "/image/" if content_type == "image"
			prefix = "/video/" if content_type == "video"
			prefix = "/application/" if content_type == "application"
			prefix = "/text/" if content_type == "text"
			prefix ||= "/unknown/"
			filename = "#{prefix}#{sanitize_filename(file.original_filename)}"
			self.filename = filename
			# self.filesize = number_to_human_size(File.size("#{file}"))
			# self.thumbnail
			# self.width
				# self.height
	  	begin
	  		# determine content type
	      self.save if AWS::S3::S3Object.store(self.filename, file.read, S3_BUCKET, :access => "public_read")
			rescue
				render :text => "Couldn't upload"
			end
		else
			#no attachment
			return false
		end
	end

	def determine_content_type(file)
		MIME::Types.type_for(file.original_filename).first.content_type.split("/")[0]
	end

  def sanitize_filename(file_name)
  	just_filename = File.basename(file_name)
  	just_filename.sub(/[^\w\.\-]/, '_') #return relative path to file, with _ delimiter
  end

end