fadecandyserver

#!/bin/sh /etc/rc.common

#
# Startup/shutdown script for fadecandyserver handling USB
# communications with one or more Fadecandy Controller boards.
#
USE_PROCD=1
START=95
STOP=01
cfg=fadecandyserver

start_service() {
	mkdir -p /tmp/etc/fcserver/
	echo "Starting FadeCandy Server"
	enabled=$(uci -q get fadecandyserver.fcserver.enabled)

	if [ "$enabled" == "" ]; then
		enabled=1
	fi

	if [ $enabled -eq 1 ]; then
		#configfile=$(uci -q get fadecandyserver.fcserver.config)
        configfile="/etc/fcserver.config"

		if [ "$configfile" == "" ]; then
			configfile="/tmp/etc/fcserver/config.json"
			build_config
		else
			if [ -f $configfile ]; then
				echo "Warning: Deprecated - Using legacy config file $configfile"
			else
				echo "Legacy Config file $configfile does not exist - exiting.."
				return 0
			fi
		fi
		procd_open_instance $cfg
		procd_set_param command /usr/bin/fcserver $configfile
		procd_set_param respawn
		procd_set_param file $configfile
		procd_set_param stdout 1
		procd_set_param stderr 1
		procd_close_instance
	else
		echo "FadeCandy Server is disabled: Exiting"
		return 0
	fi
}

stop_service() {
	# When procd terminates fadecandyserver, it might not exit fast enough.
	# So wait a little bit
	sleep 1
}

build_config() {

	header="{\n"
	footer="}"

	get_config() {
		local opt=$1
		local ucistr="uci -q get fadecandyserver"
		retval=$($ucistr"."$opt)
	}

	# listen
	get_config "fcserver.listen_ip"
	if [ "$retval" == "" ]; then
		listen_ip="0.0.0.0"
	else
		listen_ip=$retval
	fi
	get_config "fcserver.listen_port"
	if [ "$retval" == "" ]; then
		listen_port="7890"
	else
		listen_port=$retval
	fi
	listen="\"listen\": [\"$listen_ip\", $listen_port],"

	# relay
	get_config "fcserver.relay_ip"
	relay_ip=$retval
	get_config "fcserver.relay_port"
	relay_port=$retval
	if [ "$relay_ip" == "" ] || [ "$relay_port" == "" ]; then
		relay=""
	else
		relay="\"relay\": [\"$relay_ip\", $relay_port],\n\t"
	fi

	# verbose
	get_config "fcserver.verbose"
	if [ "$retval" == "false" ]; then
		verbosity="false"
	else
		verbosity="true"
	fi
	verbose="\"verbose\": $verbosity,"

	color="\"color\": {"

	# gamma
	get_config "color.gamma"
	if [ "$retval" == "" ]; then
		gammastr="2.5"
	else
		gammastr=$retval
	fi
	gamma="\"gamma\": $gammastr,"

	#whitepoint
	get_config "color.whitepoint"
	if [ "$retval" == "" ]; then
		whitepointstr="[ 1.0, 1.0, 1.0 ],"
	else
		whitepointstr="[ $retval ],"
	fi
	whitepoint="\"whitepoint\": $whitepointstr"

	# linearSlope
	get_config "color.linearSlope"
	if [ "$retval" == "" ]; then
		linearSlopestr="1.0"
	else
		linearSlopestr=$retval
	fi
	linearSlope="\"linearSlope\": $linearSlopestr,"

	# linearCutoff
	get_config "color.linearCutoff"
	if [ "$retval" == "" ]; then
		linearCutoffstr="0.0"
	else
		linearCutoffstr=$retval
	fi
	linearCutoff="\"linearCutoff\": $linearCutoffstr"

	# Construct server json
	server="$header\t$listen\n\t$relay$verbose\n\t$color\n\t\t$gamma\
		\n\t\t$whitepoint\n\t\t$linearSlope\n\t\t$linearCutoff\n\t},\n"

	# Devices
	dheader="\t\"devices\": [\n"
	dfooter="\t]\n"

	# Parse for devices
	count=0
	d=0
	dmap=""

	while [ "$(uci -q get fadecandyserver.@device[$count])" == "device" ]; do
		count=$((count+1))
	done

	while [ "$(uci -q get fadecandyserver.@device[$d])" == "device" ]; do

		# Type
		type=$(uci -q get fadecandyserver.@device[$d].type)
		if [ "$type" == "" ]; then
			type="fadecandy"
		fi
		type="\t\t{\n\t\t\t\"type\": \"$type\",\n"

		# Name
		name=$(uci -q get fadecandyserver.@device[$d].name)
		if [ "$name" != "" ]; then
			name="\t\t\t\"name\": \"$name\",\n"
		fi

		# Serial Number
		serial=$(uci -q get fadecandyserver.@device[$d].serial)
		if [ "$serial" != "" ]; then
			serial="\t\t\t\"serial\": \"$serial\",\n"
		fi

		# Device specific settings
		settings=$(uci -q get fadecandyserver.@device[$d].setting)

		i=1
		devset=""
		scount=1

		while [ "$(echo $settings | awk -v j=$scount -F "' '" '{print $j}')" != "" ]; do
			scount=$((scount+1))
		done

		while [ $i -le $scount ];do
			setting=$(echo $settings | awk -v i=$i -F "' '" '{print $i}' | tr -d "'")
			if [ "$setting" != "" ]; then
				nam=$(echo $setting | awk -F ", " '{print $1}')
				parm=$(echo $setting | awk -F ", " '{print $2}')
				devset=$devset"\t\t\t\"$nam\": $parm,\n"			
			fi
			i=$((i+1))
		done

		# Maps
		mapconf="\t\t\t\"map\": [\n"
		devmap=$(uci -q get fadecandyserver.@device[$d].map)
		if [ "$devmap" == "" ]; then
			devmap="*, 0, 0, 0, 512, \"rgb\""
		fi

		mcount=1

		while [ "$(echo $devmap | awk -v j=$mcount -F "' '" '{print $j}')" != "" ]; do
			mcount=$((mcount+1))
		done

		i=1

		while [ $i -le $mcount ];do
			mapobj=$(echo $devmap | awk -v i=$i -F "' '" '{print $i}' | tr -d "'")

			if [ "$mapobj" != "" ]; then
				f=2
				mapjson=""
				while true; do
					field=$(echo $mapobj | awk -v j=$f -F ", " '{print $j}')

					if [ "$field" != "" ]; then
						if [ "$mapjson" == "" ]; then
							mapjson=$mapjson$field
						else
							mapjson=$mapjson", "$field
						fi
						f=$((f+1))
					else
						break
					fi
				done
				mapjson="[ $mapjson ]"
	
				if [ $i -eq $(($mcount-1)) ]; then
					mapconf="$mapconf\t\t\t\t$mapjson\n"
				else
					mapconf="$mapconf\t\t\t\t$mapjson,\n"
				fi
			fi
			i=$((i+1))
		done



		# increment counter and add footer for each device
		d=$((d+1))

		mfooter="\t\t},\n"
		if [ "$d" == "$count" ]; then
			mfooter="\t\t}\n"
		else
			mfooter="\t\t},\n"
		fi

		thismap="$type$name$serial$devset$mapconf\t\t\t]\n$mfooter"

		dmap=$dmap$thismap
	done

	devices=$dheader$dmap$dfooter
	echo -e $server$devices$footer > /tmp/etc/fcserver/config.json
}