#!/bin/ash

# Called with $1=USERNAME $2=PRINTFILE

USER="$1"
FILE="$2"
PRINTERGUI="/opt/openslx/cups/printergui"

errlog () {
	FD=0
	[ -t 1 ] && FD=1
	[ -t 2 ] && FD=2
	if [ $FD -ne 0 ]; then
		echo "$2" >&$FD
	elif [ $# -gt 2 ]; then
		slxlog "$1" "$2" "$3"
		sleep 1
	else
		slxlog "$1" "$2"
	fi
	$PRINTERGUI --error "$2" &
}

if [ $# -ne 2 ]; then
	# Bad usage
	errlog "printergui-call" "Error: Wrong number of arguments (got $#) ($@)"
	exit 1
fi

if [ ! -r "$FILE" ]; then
	errlog "printergui-file" "Error: File '$FILE' not readable"
	exit 1
fi

if [ ! -s "$FILE" ]; then
	errlog "printergui-file" "Error: File '$FILE' is empty"
	exit 1
fi

# Some basic error checking if we have ghostscript available
if which gs 2>/dev/null; then
	ERRLOG=$(mktemp)
	[ -z "$ERRLOG" ] && ERRLOG="/tmp/tmp-$RANDOM-$$-$(whoami)"
	gs -sDEVICE=nullpage -dNOPAUSE -dBATCH "$FILE" 2>"$ERRLOG"
	RET=$?
	if [ $RET -ne 0 ]; then
		errlog "printergui-validate" "Error: Ghostscript choked on input file" "$ERRLOG"
		rm -f -- "$ERRLOG"
		exit 1
	fi
	rm -f -- "$ERRLOG"
else
	errlog "printergui-nogs" "Warning: Cannot validate file prior to printing: gs binary not found"
fi

# Set username prefix if found
. /opt/openslx/config
if [ -n "$SLX_PRINT_USER_PREFIX" ]; then
	export PWGUI_USERPREFIX="$SLX_PRINT_USER_PREFIX"
fi

# Try to print
$PRINTERGUI "$USER" "$FILE"
RET=$?
if [ $RET -ne 0 -a $RET -ne 143 ]; then # SIGTERM results in 143, is sent by printpwgui
	errlog "printergui-exec" "Error: printergui execution failed with exit code $RET"
fi

sleep 1
rm -f -- "$FILE"

exit $RET