#!/bin/sh
##
#
#  Logging/Progressbar handling for OTA update scripts
#
#  $Id$
#
#  kate: syntax bash;
#
##

## Logging
# Pull some helper functions for logging
_FUNCTIONS=/etc/upstart/functions
[ -f ${_FUNCTIONS} ] && source ${_FUNCTIONS}

# Make sure HACKNAME is set (NOTE: This should be overriden in the update script)
[ -z "${HACKNAME}" ] && HACKNAME="ota_script"


# Adapt the K5 logging calls to the simpler legacy syntax
logmsg()
{
	f_log "${1}" "${HACKNAME}" "${2}" "${3}" "${4}"
	# Add our own echo, like on legacy devices (useful for MRPI logging, since f_log's one is sent to /dev/console)
	if [ "${1}" != "D" ] ; then
		echo "system: ${1} ${HACKNAME}:${2}:${3}:${4}"
	fi
}


# We need to get the proper constants for our model...
kmodel="$(cut -c3-4 /proc/usid)"
case "${kmodel}" in
	"13" | "54" | "2A" | "4F" | "52" | "53" )
		# Voyage...
		SCREEN_X_RES=1088
		SCREEN_Y_RES=1448
		EIPS_X_RES=16
		EIPS_Y_RES=24
	;;
	"24" | "1B" | "1D" | "1F" | "1C" | "20" | "D4" | "5A" | "D5" | "D6" | "D7" | "D8" | "F2" | "17" | "60" | "F4" | "F9" | "62" | "61" | "5F" )
		# PaperWhite...
		SCREEN_X_RES=768
		SCREEN_Y_RES=1024
		EIPS_X_RES=16
		EIPS_Y_RES=24
	;;
	"C6" | "DD" )
		# KT2...
		SCREEN_X_RES=608
		SCREEN_Y_RES=800
		EIPS_X_RES=16
		EIPS_Y_RES=24
	;;
	"0F" | "11" | "10" | "12" )
		# Touch
		SCREEN_X_RES=600
		SCREEN_Y_RES=800
		EIPS_X_RES=12
		EIPS_Y_RES=20
	;;
	* )
		# Try the new device ID scheme...
		kmodel="$(cut -c4-6 /proc/usid)"
		case "${kmodel}" in
			"0G1" | "0G2" | "0G4" | "0G5" | "0G6" | "0G7" | "0KB" | "0KC" | "0KD" | "0KE" | "0KF" | "0KG" | "0LK" | "0LL" )
				# PW3...
				SCREEN_X_RES=1088
				SCREEN_Y_RES=1448
				EIPS_X_RES=16
				EIPS_Y_RES=24
			;;
			"0GC" | "0GD" | "0GR" | "0GS" | "0GT" | "0GU" )
				# Oasis...
				SCREEN_X_RES=1088
				SCREEN_Y_RES=1448
				EIPS_X_RES=16
				EIPS_Y_RES=24
			;;
			"0DU" | "0K9" | "0KA" )
				# KT3...
				SCREEN_X_RES=608
				SCREEN_Y_RES=800
				EIPS_X_RES=16
				EIPS_Y_RES=24
			;;
			"0LM" | "0LN" | "0LP" | "0LQ" | "0P1" | "0P2" | "0P6" | "0P7" | "0P8" | "0S1" | "0S2" | "0S3" | "0S4" | "0S7" | "0SA" )
				# Oasis 2...
				SCREEN_X_RES=1280
				SCREEN_Y_RES=1680
				EIPS_X_RES=16
				EIPS_Y_RES=24
			;;
			"0PP" | "0T1" | "0T2" | "0T3" | "0T4" | "0T5" | "0T6" | "0T7" | "0TJ" | "0TK" | "0TL" | "0TM" | "0TN" | "102" | "103" | "16Q" | "16R" | "16S" | "16T" | "16U" | "16V" )
				# PW4...
				SCREEN_X_RES=1088
				SCREEN_Y_RES=1448
				EIPS_X_RES=16
				EIPS_Y_RES=24
			;;
			"10L" | "0WF" | "0WG" | "0WH" | "0WJ" | "0VB" )
				# KT4...
				SCREEN_X_RES=608
				SCREEN_Y_RES=800
				EIPS_X_RES=16
				EIPS_Y_RES=24
			;;
			"11L" | "0WQ" | "0WP" | "0WN" | "0WM" | "0WL" )
				# Oasis 3...
				SCREEN_X_RES=1280
				SCREEN_Y_RES=1680
				EIPS_X_RES=16
				EIPS_Y_RES=24
			;;
			* )
				# Fallback... We shouldn't ever hit that.
				SCREEN_X_RES=600
				SCREEN_Y_RES=800
				EIPS_X_RES=12
				EIPS_Y_RES=20
			;;
		esac
	;;
esac
# And now we can do the maths ;)
EIPS_MAXCHARS="$((${SCREEN_X_RES} / ${EIPS_X_RES}))"
EIPS_MAXLINES="$((${SCREEN_Y_RES} / ${EIPS_Y_RES}))"


# Adapted from libkh[5]
## Check if we have an FBInk binary available somewhere...
# Default to something that won't horribly blow up...
FBINK_BIN="true"
for my_hackdir in linkss linkfonts libkh usbnet ; do
	my_fbink="/mnt/us/${my_hackdir}/bin/fbink"
	if [ -x "${my_fbink}" ] ; then
		FBINK_BIN="${my_fbink}"
		# Got it!
		break
	fi
done
has_fbink()
{
	# Because the fallback is the "true" binary/shell built-in ;).
	if [ "${FBINK_BIN}" != "true" ] ; then
		# Got it!
		return 0
	fi

	# If we got this far, we don't have fbink installed
	return 1
}

do_fbink_print()
{
	# We need at least two args
	if [ $# -lt 2 ] ; then
		echo "not enough arguments passed to do_fbink_print ($# while we need at least 2)"
		return
	fi

	kh_eips_string="${1}"
	kh_eips_y_shift_up="${2}"

	# Unlike eips, we need at least a single space to even try to print something ;).
	if [ "${kh_eips_string}" == "" ] ; then
		kh_eips_string=" "
	fi

	# Check if we asked for a highlighted message...
	if [ "${3}" == "h" ] ; then
		fbink_extra_args="h"
	else
		fbink_extra_args=""
	fi

	# NOTE: FBInk will handle the padding. FBInk's default font is square, not tall like eips,
	#       so we compensate by tweaking the baseline ;).
	${FBINK_BIN} -qpm${fbink_extra_args} -y $(( -4 - ${kh_eips_y_shift_up} )) "${kh_eips_string}"
}

do_fbink_bar()
{
	# We need at least two args
	if [ $# -lt 2 ] ; then
		echo "not enough arguments passed to do_fbink_bar ($# while we need at least 2)"
		return
	fi

	fbink_progress="${1}"
	kh_eips_y_shift_up="${2}"

	${FBINK_BIN} -qP ${fbink_progress} -y $(( -4 - ${kh_eips_y_shift_up} ))
}

do_eips_print()
{
	# We need at least two args
	if [ $# -lt 2 ] ; then
		echo "not enough arguments passed to do_eips_print ($# while we need at least 2)"
		return
	fi

	kh_eips_string="${1}"
	kh_eips_y_shift_up="${2}"

	# Get the real string length now
	kh_eips_strlen="${#kh_eips_string}"

	# Add the right amount of left & right padding, since we're centered, and eips doesn't trigger a full refresh,
	# so we'll have to padd our string with blank spaces to make sure two consecutive messages don't run into each other
	kh_padlen="$(((${EIPS_MAXCHARS} - ${kh_eips_strlen}) / 2))"

	# Left padding...
	while [ ${#kh_eips_string} -lt $((${kh_eips_strlen} + ${kh_padlen})) ] ; do
		kh_eips_string=" ${kh_eips_string}"
	done

	# Right padding (crop to the edge of the screen)
	while [ ${#kh_eips_string} -lt ${EIPS_MAXCHARS} ] ; do
		kh_eips_string="${kh_eips_string} "
	done

	# And finally, show our formatted message centered on the bottom of the screen (NOTE: Redirect to /dev/null to kill unavailable character & pixel not in range warning messages)
	eips 0 $((${EIPS_MAXLINES} - 2 - ${kh_eips_y_shift_up})) "${kh_eips_string}" >/dev/null
}

eips_print_bottom_centered()
{
	# We need at least two args
	if [ $# -lt 2 ] ; then
		echo "not enough arguments passed to eips_print_bottom_centered ($# while we need at least 2)"
		return
	fi

	kh_eips_string="${1}"
	kh_eips_y_shift_up="${2}"

	# Sleep a tiny bit to workaround the logic in the 'new' (K4+) eInk controllers that tries to bundle updates
	if [ "${EIPS_SLEEP}" == "true" ] ; then
		usleep 150000	# 150ms
	fi

	# Can we use FBInk?
	if has_fbink ; then
		do_fbink_print "${kh_eips_string}" ${kh_eips_y_shift_up}
	else
		do_eips_print "${kh_eips_string}" ${kh_eips_y_shift_up}
	fi
}


## Progressbar
# Some constants...
_BLANKET="com.lab126.blanket"
_OTAMODULE="${_BLANKET}.ota"

# Check if blanket is running
if pkill -0 blanket ; then
	BLANKET_IS_UP="true"
else
	BLANKET_IS_UP="false"
fi

# Send progress to blanket, or print it manually otherwise
otautils_update_progress_indicator()
{
	local cur_percentage="${1}"

	if [ "${BLANKET_IS_UP}" == "true" ] ; then
		lipc-send-event ${_OTAMODULE} otaSplashProgress -i ${cur_percentage}
	else
		# NOTE: We can actually draw a progress bar with FBInk!
		if has_fbink ; then
			do_fbink_bar ${cur_percentage} 2
		else
			do_eips_print "Progress: ${cur_percentage}/100" 2
		fi
	fi
}

# Check if arg is an int
is_integer()
{
	# Cheap trick ;)
	[ "${1}" -eq "${1}" ] 2>/dev/null
	return $?
}

# The amount of steps needed to fill the progress bar
# I'm lazy, so just count the amount of calls in the script itself ;)
# NOTE: Yup, $0 still points to the original script that sourced us :).
[ -z ${STEPCOUNT} ] && STEPCOUNT="$(grep -c '^[[:blank:]]*otautils_update_progressbar$' ${0} 2>/dev/null)"
# Make sure it's sane...
is_integer "${STEPCOUNT}" || STEPCOUNT=1
# NOTE: If you need to for some strange reason, this can be overriden in the update script

# In case we need to catch failure early...
otautils_die()
{
	local error_string="${1}"

	if [ "${BLANKET_IS_UP}" == "true" ] ; then
		lipc-send-event ${_OTAMODULE} otaSplashError -s "${error_string}"
	else
		eips_print_bottom_centered "Error: ${error_string}" 1
	fi
	if [ $? -eq 0 ] ; then
		logmsg "D" "guierror" "" "display error screen: ${error_string}"
	else
		logmsg "W" "guierror" "status=fail" "display error screen: ${error_string}"
	fi

	# And it is called die, after all ;)
	sleep 5
	exit 1
}

# Fill up our progress bar, one step at a time
# Keep track of what we're doing...
_CUR_STEP=0
_CUR_PERCENTAGE=0
otautils_update_progressbar()
{
	# One more step...
	_CUR_STEP=$((_CUR_STEP + 1))
	# Bounds checking...
	if [ ${_CUR_STEP} -lt 0 ] ; then
		_CUR_STEP=0
	elif [ ${_CUR_STEP} -gt ${STEPCOUNT} ] ; then
		_CUR_STEP=${STEPCOUNT}
	fi

	# Make that a percentage
	local bar_percentage=$(( (${_CUR_STEP} * 100) / ${STEPCOUNT} ))
	# We can only *fill* the bar...
	if [ ${_CUR_PERCENTAGE} -lt ${bar_percentage} ] ; then
		_CUR_PERCENTAGE=${bar_percentage}
	fi

	# Make sure that percentage is sane...
	is_integer "${_CUR_PERCENTAGE}" || _CUR_PERCENTAGE=0
	# Bounds checking...
	if [ ${_CUR_PERCENTAGE} -gt 100 ] ; then
		_CUR_PERCENTAGE=100
	elif [ ${_CUR_PERCENTAGE} -lt 0 ] ; then
		_CUR_PERCENTAGE=0
	fi

	# Finally, refresh the bar
	otautils_update_progress_indicator "${_CUR_PERCENTAGE}"
	if [ $? -eq 0 ] ; then
		logmsg "D" "guiprogress" "progress=${_CUR_PERCENTAGE}" "update progress indicator"
	else
		logmsg "W" "guiprogress" "progress=${_CUR_PERCENTAGE},status=fail" "update progress indicator"
	fi
}

# This may come in handy for bridge related packages...
make_mutable() {
	local my_path="${1}"
	# NOTE: Can't do that on symlinks, hence the hoop-jumping...
	if [ -d "${my_path}" ] ; then
		find "${my_path}" -type d -exec chattr -i '{}' \;
		find "${my_path}" -type f -exec chattr -i '{}' \;
	elif [ -f "${my_path}" ] ; then
		chattr -i "${my_path}"
	fi
}

make_immutable() {
	local my_path="${1}"
	if [ -d "${my_path}" ] ; then
		find "${my_path}" -type d -exec chattr +i '{}' \;
		find "${my_path}" -type f -exec chattr +i '{}' \;
	elif [ -f "${my_path}" ] ; then
		chattr +i "${my_path}"
	fi
}

# That's all, folks ;)