PinePhone postmarketOS Phosh ModemManager call audio routing

#!/bin/bash
#PinePhone postmarketOS Phosh ModemManager Linux 5.5 auto call audio routing
# This script will switch to Earpiece/Mic when a call is added (not actually answered)
# and turn loudspeaker on/mic off when call ended. Call waiting may screw this up.
# It's so dirty to handle it like this, but it works for the time being :P

MONITOR1="type='signal', sender='org.freedesktop.ModemManager1', interface='org.freedesktop.ModemManager1.Modem.Voice', member='CallAdded'"
MONITOR2="type='signal', sender='org.freedesktop.ModemManager1', interface='org.freedesktop.ModemManager1.Modem.Voice', member='CallDeleted'"

DISPLAY=:0.0 dbus-monitor --system "${WATCH1}" "${WATCH2}" | \
awk '
/member=CallAdded/ { system("pactl set-card-profile alsa_card.platform-sound VoiceCall && echo \"Call Added\"") }
/member=CallDeleted/ { system("pactl set-card-profile alsa_card.platform-sound HiFi && echo \"Call Ended\"") }
'