Contents

require 'thumbo/storages/abstract'
require 'fileutils'
require 'digest/md5'

module Thumbo
  class Filesystem < AbstractStorage
    attr_accessor :path, :prefix_size
    def initialize opts = {}
      @path = opts[:path] || 'public/images/thumbo'
      @prefix_size = opts[:prefix_size] || 1
    end

    def read filename
      File.read(calculate_path(filename))

    rescue Errno::ENOENT
      raise_file_not_found(filename)

    end

    def write filename, blob
      target = ensure_path(filename)
      (File.open(target, 'w') << blob).close
    end

    def write_file filename, file
      target = ensure_path(filename)
      FileUtils.cp(file.path, target)
    end

    def delete filename
      target = calculate_path(filename)
      if File.exist?(target)
        File.delete(target)

      else
        raise_file_not_found(filename)

      end
    end

    def paths filename
      if target = exist?(filename)
        [target]

      else
        raise_file_not_found(filename)

      end
    end

    def exist? filename
      target = calculate_path(filename)
      File.exist?(target) ? target : false
    end

    def prefix filename
      Digest::MD5.hexdigest(filename)[0, prefix_size]
    end

    private
    def calculate_path filename
      File.join( path, prefix(filename), filename )
    end

    def ensure_path filename
      target = calculate_path(filename)
      FileUtils.mkdir_p(target.split('/')[0..-2].join('/'))
      target
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
thumbo-0.6.0	lib/thumbo/storages/filesystem.rb