plexpowerd.rb

plexpowerd.rb

#Plexhometheater closes itself after 30 minutes of inactivty
#This script checks to see if plexhometheater is off, and if it is,
#checks for any major network traffic (to indicate movie stream, or file xfer)
#if no network activity is detected, the computer shuts down.
#if network activity IS detected, plexhometheater is started again
def plexIsRunning()
	command = `ps -ef|grep -v grep|grep /opt/plexhometheater/bin/plexhometheater`
	if command == "" then
		return false
	end
	return true
end

def totalBandwidth()
	command = `ifconfig eth0|grep "RX bytes:"`	
	m = Regexp.new('\\d+')
	rx_bytes = m.match(command).to_s.to_i
	tx_bytes = m.match(command.to_s.split(')')[1]).to_s.to_i
	return rx_bytes + tx_bytes
end

def checkTimer(t)
	if t - Time.now.to_i <= 0 then
		return true
	end
	return false
end

#set initial variables:
#time to shutdown = (time it takes plex to shutdown) + (_MAX_TICKS * _NETWORK_TIMER_INTERVAL)
_MAX_TICKS = 5
_PLEX_TIMER_INTERVAL = 5 * 60
_NETWORK_TIMER_INTERVAL = 3 * 60

plex_timer = Time.now.to_i + _PLEX_TIMER_INTERVAL
network_timer = Time.now.to_i + _NETWORK_TIMER_INTERVAL

previous_bandwidth = totalBandwidth()
network_activity_counter = _MAX_TICKS

while(true)
	if checkTimer(network_timer) then
		if totalBandwidth() - previous_bandwidth >= 256000 then
			network_activity_counter = _MAX_TICKS
		else
			network_activity_counter -= 1
		end
		previous_bandwidth = totalBandwidth()
		network_timer = Time.now.to_i + _NETWORK_TIMER_INTERVAL
	end

	if checkTimer(plex_timer) then
		if plexIsRunning() then
			plex_timer = Time.now.to_i + _PLEX_TIMER_INTERVAL
		else
			if network_activity_counter > 0 then
				`plexhometheater.sh`
				plex_timer = Time.now.to_i + _PLEX_TIMER_INTERVAL
			else
				`sudo poweroff`				
			end
		end
	end
end