90-schiit-fulla.rules

SUBSYSTEMS=="usb", ACTION=="add|change", ATTRS{idVendor}=="0d8c", ATTRS{idProduct}=="1066", RUN+="/usr/local/bin/schiit-fulla-switch added"
SUBSYSTEMS=="usb", ACTION=="remove", ATTRS{idVendor}=="0d8c", ATTRS{idProduct}=="1066", RUN+="/usr/local/bin/schiit-fulla-switch removed"

schiit-fulla-switch

#!/bin/bash

set -e

export DISPLAY="$(w | grep -e ^naftuli | awk '{print $3;}')"

if [ -z "$DISPLAY" ]; then
   echo "No Display Found; No Active User?" >&2
   exit 1
fi

function usage() {
    echo "Usage: $0 added|removed" >&2
    echo "Switch the audio sink based on whether a Fulla is present." >&2
    exit 1
}

if [[ "$1" != "added" && "$1" != "removed" ]]; then
    usage
fi

speakers_grep='alsa_output.pci-0000_00_1b.0.analog-stereo'
schiit_grep='alsa_output.usb-Schiit_Audio_I_m_Fulla_Schiit-00-Schiit.analog-stereo'

function switch_audio_output() {
    sink_id="$(pactl list short sinks | grep -e $1 | awk '{print $1;}')"

    if [ -z "$sink_id" ]; then
       echo "ERROR: Sink Not Found." >&2
       exit 1
    fi

    # move all streams over to the speakers
    pactl list short sink-inputs | awk '{print $1;}' | while read stream_id; do
        pactl move-sink-input "$stream_id" "$sink_id"
    done

    # set the default sink
    pactl set-default-sink "$sink_id"

    return 0;
}

action="$1"

if [ "$action" == "added" ]; then
    switch_audio_output $schiit_grep
else
    switch_audio_output $speakers_grep
fi