AppleScript to assist with scheduling changes in Backblaze backup speed

backsimmer.rb

#!ruby

VALID_SPEED_DESCRIPTORS = %w(slow medium fast unlimited 0 10 20 30 40 50 60 70 80 90 100)

def applescript_for_speed(descriptor)
  speed = case descriptor.to_s.downcase
  when "slow"
    "20"
  when "medium"
    "40"
  when "fast"
    "70"
  when "unlimited"
    "100"
  else
    descriptor.to_s
  end
  
  unless VALID_SPEED_DESCRIPTORS.include?(speed)
    puts "Call with an argument: #{VALID_SPEED_DESCRIPTORS}"
    exit
  end
  
  script = <<EOT
tell application "System Preferences" to activate
tell application "System Events"
  tell process "System Preferences"
    click menu item "Backblaze Backup" of the menu "View" of menu bar 1
    click button "Settings..." of the first group of the window "Backblaze Backup"
    click radio button "Performance" of the first tab group of the front sheet of the window "Backblaze Backup"
    set value of the first value indicator of the first slider of the first tab group of the first sheet of the window "Backblaze Backup" to #{speed}
    click button "OK" of the first sheet of the window "Backblaze Backup"
  end tell
end tell
tell application "System Preferences" to quit
EOT
  script.gsub('"', '\"')
end

`osascript -e "#{ applescript_for_speed( ARGV[0] ) }"`

example crontab entries

# in /etc/crontab

# maximum Backblaze during wee hours
0 0 * * * danb /usr/bin/ruby /Users/danb/bin/backsimmer.rb 100 > /dev/null 2>&1;

# medium Backblaze during morning and daytime hours
0 6 * * * danb /usr/bin/ruby /Users/danb/bin/backsimmer.rb 40 > /dev/null 2>&1;

# slow Backblaze during evening hours
0 17 * * * danb /usr/bin/ruby /Users/danb/bin/backsimmer.rb 20 > /dev/null 2>&1;

Exactly what I was looking for. Thanks!