VPN Manager for systems using Mullvad and Tailscale (without the intergreation)

vpn-manager.sh

#!/bin/zsh
# Requires: notify-send, Mullvad, Tailscale, ZSH
# Option -n creates system notification

flag_notify=0

zparseopts -D -K -- \
 n=flag_notify


status_func () {
  echo -e "\033[31;90mTailscale Status:\033[0m"
  tailscale status --peers=false
  echo -e "\033[31;90mMullvad Status:\033[0m"
  mullvad status
}

notify_func () {
  
  if [[ $flag_notify != "0" ]]; then
    notify-send -i mullvad-vpn -a "VPN Manager" "$1"
  fi

  echo "$1"
}

tailscale_status=$(tailscale status --peers=false) 
ts_toggle=1
if [[ $tailscale_status == "Tailscale is stopped." ]]; then
  ts_toggle=0
fi
#echo $ts_toggle

mullvad_status=$(mullvad status --json | jq -r .state)
mv_toggle=1
if [[ $mullvad_status == "disconnected" ]]; then
  mv_toggle=0
fi
#echo $mv_toggle 

connect_func () {
    tailscale down
    mullvad connect
    notify_func 'Connected to Mullvad and Disabled Tailscale!'
}
disconnect_func () {
    mullvad disconnect
    tailscale up
    notify_func 'Disconnected from Mullvad and Enabled Tailscale!'
}

run_func () {
    if [[ $ts_toggle == 1 && $mv_toggle == 0 ]]; then
      eval $1
    elif [[ $ts_toggle == 0 && $mv_toggle == 1 ]]; then
      eval $2
   elif [[ $ts_toggle == 0 && $mv_toggle == 0 ]]; then
      eval $3
   else
      eval $4
   fi
}

case $1 in
  
  status)
    status_func
    ;;
  
  up)
    run_func \
    connect_func \
    'notify_func "Mullvad already up!"' \
    'notify_func "Both Mullvad and Tailscale Disabled.
Enabling Mullvad!" && mullvad connect'\
     'notify_func "Both Mullvad and Tailscale Enabled.
Disabling Tailscale!" && tailscale down'
    ;;
  
  down)
    run_func \
    'notify_func "Mullvad already down!"' \
    disconnect_func \
    'notify_func "Both Mullvad and Tailscale Disabled.
Enabling Tailscale!" && tailscale up'\
     'notify_func "Both Mullvad and Tailscale Enabled.
Disabling Mullvad!" && mullvad disconnect'
    ;;
 
  toggle)
    run_func \
    connect_func \
    disconnect_func \
    'notify_func "Both Mullvad and Tailscale Disabled.
Enabling Tailscale!" && tailscale up'\
     'notify_func "Both Mullvad and Tailscale Enabled.
Disabling Tailscale!" && tailscale down'
    ;; 

  *)
    echo "Usage: $0 [-n] {up|down|toggle|status}"
    exit 1
    ;;

esac