Switch bluetooth audio profile based on wether something uses the mic

switchprofile.sh

#!/bin/bash

if ! (pactl list short sources | grep virt); then
  pactl load-module module-remap-source source_properties="device.description=virt" source_name=virt channel_map=mono channels=1
fi

trap "pactl unload-module module-remap-source" SIGINT

pactl set-default-source virt

LAST_STATE=""
pactl subscribe | while read line; do
  echo $line
  if [[ "$line" == *"change"* ]]; then
  HAS_CONSUMER=$(pactl --format=json list source-outputs | jq -r '[.[].properties."target.object" == "virt"] | any')
  if [ "$HAS_CONSUMER" != "$LAST_STATE" ]; then
    echo "$HAS_CONSUMER"
    if $HAS_CONSUMER == "true"; then
      echo "Headset mode"
      pactl set-card-profile bluez_card.AC_12_2F_0A_C0_ED headset-head-unit-msbc
    else
      echo "Hifi mode"
      pactl set-card-profile bluez_card.AC_12_2F_0A_C0_ED a2dp-sink
    fi
  fi
  LAST_STATE="$HAS_CONSUMER"
  fi
done