cask "omnigraffle" do
  if MacOS.version <= :sierra
    version "7.8.2"
    sha256 "ab463ea6c12d49c4104d3814ac3280d0359072702d4751f5074f644fc79de0c6"
    url "https://downloads.omnigroup.com/software/Archive/MacOSX/10.12/OmniGraffle-#{version}.dmg"
  elsif MacOS.version <= :high_sierra
    version "7.11.5"
    sha256 "83ef24af2dbd7977b9922e992f17f23e102562f0589d28bc37d5579b4a4d4938"
    url "https://downloads.omnigroup.com/software/MacOSX/10.13/OmniGraffle-#{version}.dmg"
  else
    version "7.17.1"
    sha256 "e6df346d43a5df5ca42ba9cf9af6c2584a78c17d28bbdc4ea7727a2ec2ea5927"
    url "https://downloads.omnigroup.com/software/MacOSX/10.14/OmniGraffle-#{version}.dmg"
  end

  appcast "https://update.omnigroup.com/appcast/com.omnigroup.OmniGraffle#{version.major}"
  name "OmniGraffle"
  homepage "https://www.omnigroup.com/omnigraffle/"

  auto_updates true
  depends_on macos: ">= :sierra"

  app "OmniGraffle.app"

  zap trash: "~/Library/Application Support/The Omni Group/OmniGraffle"
end