class Geminabox::IncomingGem

def dest_filename
  File.join(@root_path, "gems", name)
end

def gem_data
  File.open(@tempfile.path, "rb")
end

def get_name
  filename = %W[#{spec.name} #{spec.version}]
  filename.push(spec.platform) if spec.platform && spec.platform != "ruby"
  filename.join("-") + ".gem"
end

def hexdigest
  @sha1
end

def initialize(gem_data, root_path = Geminabox.data)
  unless gem_data.respond_to? :read
    raise ArgumentError, "Expected an instance of IO"
  end
  digest = Digest::SHA1.new
  @tempfile = Tempfile.new("gem", encoding: "binary", binmode: true)
  while data = gem_data.read(1024**2)
    @tempfile.write data
    digest << data
  end
  @tempfile.close
  @sha1 = digest.hexdigest
  @root_path = root_path
end

def name
  @name ||= get_name
end

def spec
  @spec ||= Gem::Package.new(@tempfile.path).spec
end

def valid?
  spec && spec.name && spec.version
rescue Gem::Package::Error
  false
end