#!/bin/bash

help(){
cat >&2 <<ENDHELP
$0 [args] :
-s|--src <src dir>	: Define source directory (default: $SRCDIR)
-n|--name <name>	: Define the pnd base name (default: $PND_NAME)
-d|--dest <dest dir>	: Define destination directory (default: $DESTDIR)
-a|--author <name>	: programmers names (default: $AUTHOR)
-v|--version <version>	: Define the version (default: $VERSION)
-w|--website <url>	: Define the url (default: $WEBSITE)
-b|--build <build id>	: Define the build number (default: $BUILD)
-f|--force		: overide PXML.xml file if found
-h|--help		: show this screen
ENDHELP
}

DEBUG(){
	echo $*>&2
}

buildApplicationList(){
	#output "<appname> [<desktopfile>]" lines
	cd $DESTDIR
	DESTLST=$(find $SRCDIR -name "*desktop";find $DESTDIR -name "*desktop")
	if [ ! -z "$DESTLST" ];then
		{
		for d in $DESTLST;do
			EXE=$(awk -F= '/Exec/{print $2}'<$d|awk '{print $1}'|head -1)
			if [[ "x$EXE" != "x" ]];then
				BIN=$(find . -executable -type f -name $(basename $EXE)|head -1)
				echo ${BIN:-$EXE} $d
			fi
		done
		}|sort|awk 'BEGIN{P=""}$1!=P{print}{P=$1}'
	else
		find . -executable -type f \! -name "*sh"
	fi
}

getPATH(){
	cd $DESTDIR
	L=$(find . -type d -name bin)
	echo $L|sed "s#\./#$(pwd)/#g;s# #:#g"
}
getLIBPATH(){
	cd $DESTDIR
	L=$(find . -type d -name lib)
	echo $L|sed "s#\./#$(pwd)/#g;s# #:#g"
}

genLaunchScript() {
	S="$DESTDIR/scripts/$(basename $1).sh"
	if [ -e $S ];then
		mv $S ${S}.old
	fi
	cat>$S<<ENDSCRIPT
#!/bin/sh
export PATH="$(getPATH):\${PATH:-"/usr/bin:/bin:/usr/local/bin"}"
export LD_LIBRARY_PATH="$(getLIBPATH):\${LD_LIBRARY_PATH:-"/usr/lib:/lib"}"
export HOME="/mnt/utmp/$PND_NAME" XDG_CONFIG_HOME="/mnt/utmp/$PND_NAME"
export SDL_AUDIODRIVER="alsa"
cd \$HOME
[ -e "\$HOME/scripts/pre_script.sh" ] && . \$HOME/scripts/pre_script.sh
if [ -e "\$HOME/scripts/post_script.sh" ];then
	$1 \$*
	. \$HOME/scripts/post_script.sh
else
	exec $1 \$*
fi
ENDSCRIPT
	chmod 755 $S
}

desktop2application(){ #generate PXML application info out of a desktop file passed as parameter
	DVERSION=$(awk -F= '$1=="Version"{print $2}'<$1)
	if [ -z "$DVERSION" ] || [[ "$DVERSION" = "1.0" ]];then
		DVERSION=$VERSION
	fi
	MAJOR=$(echo $DVERSION|awk -F. '{print $1}')
	MINOR=$(echo $DVERSION|awk -F. '{print $2}')
	REL=$(echo $DVERSION|awk -F. '{print $3}')
	MINOR=${MINOR:-"0"}
	REL=${REL:-"0"}

	echo "    <version major=\"$MAJOR\" minor=\"$MINOR\" release=\"$REL\" build=\"$BUILD\"/>              <!--This programs version-->"
	awk -F= '($1~/^Name/&&/en_US/)||$1~/^Name=/{print $1" "$2}'<$1|while read DN DNV;do
		l=$(echo $DN|sed 's/Name//;s/\[//;s/\]//')
		echo "    <title lang=\"${l:-"en_US"}\">$DNV</title>"
	done
	awk -F= '($1~/^Comment/&&/en_US/)||$1~/^Comment=/{print $1" "$2}'<$1|while read DN DNV;do
		l=$(echo $DN|sed 's/Comment//;s/\[//;s/\]//')
		echo "    <description lang=\"${l:-"en_US"}\">$DNV</description>"
	done

	ICON=$(awk -F= '$1~/^Icon/{print $2}'<$1)
	if [ ! -z "$ICON" ];then
		echo "    <icon src="'"'$(find $DESTDIR -name ${ICON}.png|head -1)'"/>'
		if [ ! -e "$DEST/icon.png" ];then
			cp $(find $DESTDIR -name ${ICON}.png|head -1) $DEST/icon.png
		fi
	fi

	DOC=$(find $DESTDIR -type d -name html|head -1)
	if [ ! -z "$DOC" ];then
		cat <<END
    <info name="${BASEB} documentation" type="text/html" src="$DOC"/>
END
	fi

	cat <<ENDCATEGORIES
    <categories>
      <!-- http://standards.freedesktop.org/menu-spec/latest/apa.html -->
ENDCATEGORIES

	DCAT=$(awk -F= '$1=="Categories"{print $2}'<$1)
	CATCNT=$(($(echo $DCAT|sed "s/;/ /g"|wc -w) / 2))
	if [ $CATCNT -gt 0 ];then
		for i in $(seq 1 $CATCNT);do
			DCATMAJ=$(echo $DCAT|awk -F\; "{print \$$(($i*2-1))}")
			DCATMIN=$(echo $DCAT|awk -F\; "{print \$$(($i*2))}")
			cat <<ENDCATEGORIES
      <category name="$DCATMAJ">
        <subcategory name="$DCATMIN"/>
      </category>
ENDCATEGORIES
		done
	else
		cat <<ENDCATEGORIES
      <category name="Game">
        <subcategory name="ArcadeGame"/>
      </category>
ENDCATEGORIES
	fi
	cat <<ENDCATEGORIES
    </categories>
ENDCATEGORIES
}

genPxml(){
	# output the PXML.xml file
	if [ -e $DESTDIR/PXML.xml ];then
		mv $DESTDIR/PXML.xml $DESTDIR/PXML.xml.old
	fi
	cat >$DESTDIR/PXML.xml <<ENDHEAD
<?xml version="1.0" encoding="UTF-8"?>
<PXML xmlns="http://openpandora.org/namespaces/PXML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="PXML_schema.xsd">
<!-- please see http://pandorawiki.org/PXML_specification for more information before editing -->

ENDHEAD
	if [ ! -d $DESTDIR/previews ];then
		mkdir -p $DESTDIR/previews
	fi
	if [ ! -d $DESTDIR/scripts ];then
		mkdir $DESTDIR/scripts
	fi
	buildApplicationList|while read BIN DESK;do
		BASEB=$(basename $BIN)
		genLaunchScript $BIN
		cat >>$DESTDIR/PXML.xml <<ENDAPP
  <application id="$PND_NAME-$(basename $BIN)-$RND" appdata="$PND_NAME">
    <exec command="scripts/${BASEB}.sh"/>
    <author name="$AUTHOR" website="$WEBSITE"/>		<!--Optional email and website, name required-->
    <osversion major="1" minor="0" release="0" build="0"/>		<!--The minimum OS version required-->
ENDAPP
		echo "    <previewpics>" >>$DESTDIR/PXML.xml
		if [ ! -z "$(find $DESTDIR/previews -name "$BASEB*")" ];then
			for i in $(find $DESTDIR/previews -name "$BASEB*");do
				echo "      <pic src=\"previews/$(basename $i)\"/>" >>$DESTDIR/PXML.xml
			done
		else
			echo "<!-- <pic src=\"previews/${BASEB}.png\"/> -->" >>$DESTDIR/PXML.xml
		fi
		echo "    </previewpics>" >>$DESTDIR/PXML.xml
	
		if [ ! -z "$DESK" ];then
			desktop2application $DESK >>$DESTDIR/PXML.xml
		else
			MAJOR=$(echo $VERSION|awk -F. '{print $1}')
			MINOR=$(echo $VERSION|awk -F. '{print $2}')
			REL=$(echo $VERSION|awk -F. '{print $3}')
			MINOR=${MINOR:-"0"}
			REL=${REL:-"0"}
			cat >>$DESTDIR/PXML.xml <<ENDINFO
    <title lang="en_US">$PND_NAME</title>
    <description lang="en_US">en_US Automatically generated pxml from $(pwd) PND=$PND_NAME</description>
    <version major="$MAJOR" minor="$MINOR" release="$REL" build="$BUILD"/>		<!--This programs version-->
    <categories>
      <category name="Game">						<!-- Main Category : {Audio Video Development Education Game Graphics Network Office Setting System Utility} -->
        <subcategory name="ArcadeGame"/>				<!-- http://standards.freedesktop.org/menu-spec/latest/apa.html -->
      </category>
    </categories>
ENDINFO
		fi
		cat >>$DESTDIR/PXML.xml <<ENDINFO
  <!-- You can also use these 
    <clockspeed frequency="600"/>
    <icon>someIcon.png</icon>
    <background>Yes</background>
    <standalone>No</standalone>
    <startdir>someDirectoryInsidePnd</startdir>
    <info name="My freaking documentation" type="text/html" src="index.html"/>
  -->
  </application>

ENDINFO
	done
	echo "</PXML>" >>$DESTDIR/PXML.xml
}


#####################
### Script main :
##

FORCE=0
BUILD=1
AUTHOR=$USER
WEBSITE=${WEBSITE:-"http://www.openpandora.org"}
SRCDIR=${SRCDIR:-$(pwd)}
PND_NAME=${PND_NAME:-$(basename $SRCDIR|awk -F- '{print $1}')}
VERSION=${VERSION:-$(basename $SRCDIR|awk -F- '{print $2}')}
DESTDIR=${DESTDIR:-"/mnt/utmp/$PND_NAME"}
RND=$RANDOM
# Parse arguments
while [ $# -gt 0 ];do
	case $1 in
	-s|--src)	SRCDIR=$2;shift;;
	-d|--dest)	DESTDIR=$2;shift;;
	-b|--build)	BUILD=$2;shift;;
	-a|--author)	AUTHOR=$2;shift;;
	-n|--name)	PND_NAME=$2;shift;;
	-v|--version)	VERSION=$2;shift;;
	-w|--website)	WEBSITE=$2;shift;;
	-f|--force)	FORCE=1;;
	-h|--help)	help;exit 1;;
	*)		echo "'$1' unknown argument">&2;help;exit 2;;
	esac
	shift;
done

# Validate arguments
if [ ! -d $SRCDIR ];then
	echo "$SRCDIR don't exist" >&2
	help
	exit 3
fi
if [ ! -d $DESTDIR ] && [ $FORCE -eq 0 ];then
	echo "$DESTDIR don't exist" >&2
	help
	exit 4
elif [ ! -d $DESTDIR ];then
	mkdir -p $DESTDIR
	if [ $? -ne 0 ];then
		echo "$DESTDIR don\'t exist and cannot be created" >&2
		help
		exit 5
	fi
fi
if [ $(buildApplicationList|wc -l) -le 0 ];then
	echo "No applications found">&2
	help
	exit 6
fi
if [ -e $DESTDIR/PXML.xml ] && [ $FORCE -eq 0 ];then
	echo "PXML file exist and force disabled." >&2
	help 
	exit 7
fi
genPxml