slack_presence.bash

#!/bin/bash

# Configuration #############################################

# For Slack tokens go to https://api.slack.com/#auth
SLACK_TOKEN=""
# In seconds
AWAY_AFTER=120
CHECK_EVERY=10

# End configuration #########################################


LAST_PRESENCE=''
function presence_set {
	if [[ ${1} -eq 1 ]]
	then
		PRESENCE='away'
	else
		PRESENCE='active'
	fi

	if [ "${LAST_PRESENCE}" != "${PRESENCE}" ]
	then
		curl -s "https://slack.com/api/presence.set?token=${SLACK_TOKEN}&presence=${PRESENCE}&pretty=1" > /tmp/slack_presence.log
		RESULT=$?
		if [[ ${CODERESULT} -ne 0 ]]
		then
			echo "Failed to change Slack presence to ${PRESENCE}" > /tmp/slack_presence.log
		else
			echo "Slack presence to ${PRESENCE}" > /tmp/slack_presence.log
			LAST_PRESENCE=${PRESENCE}
		fi
	fi
}

while true;
do
	LAST_INPUT_TIME_ELAPSED=`ioreg -c IOHIDSystem | perl -lane 'if(/Idle/) {print $F[-1]/1000000000; last;}'`
	IS_AWAY=`bc <<< "$LAST_INPUT_TIME_ELAPSED > ${AWAY_AFTER}"`
	presence_set ${IS_AWAY}
	sleep ${CHECK_EVERY}
done