#!/bin/bash


ACTION="$1"
PKG="$2"

USER=$(id -un $PKEXEC_UID)
USERHOME=$HOME
BINDIR=$USERHOME"/.local/bin"
DESTDIR=$BINDIR"/telegram"
DESTDOWNLOAD=$USERHOME"/.cache/epi-downloads"
DESTDESKTOP=$USERHOME"/.local/share/applications/zero-lliurex-telegram.desktop"

CHECK_GROUP=$(id -nG $USER )
AUTH_GROUP=0
AUTH_GROUP_LIST=("students" "alu")

eval "CHECK_GROUP_LIST=($CHECK_GROUP)"

for item in "${CHECK_GROUP_LIST[@]}";do
	gr=$(echo "$item" |awk '{print tolower($0)}')
	for i in "${AUTH_GROUP_LIST[@]}";do
		if [[ "$gr" == *"$i"* ]]; then
			AUTH_GROUP=1
			break
		fi
	done
	if [ $AUTH_GROUP -eq 1 ];then
		break
	fi
done


TCH_URL="https://desktop.telegram.org/changelog"
TVERSION=$(wget -qO- $TCH_URL | sed -e 's/<[^>]*>//g;/^\s*$/d' | grep -o 'v [0-9.]*' -m1 | cut -d ' ' -f2)

if [[ $(arch) == "x86_64" ]]
then
	TSETUP="tsetup.${TVERSION}.tar.xz"
	TURL="https://telegram.org/dl/desktop/linux/"
else
	TSETUP="tsetup32.${TVERSION}.tar.xz"
	TURL="https://telegram.org/dl/desktop/linux32/"
fi


case $ACTION in

	getStatus)
		case $PKG in
			telegram)
				if [ -d ${DESTDIR} ]; then
					echo 0
				else
					echo 1
				fi
			;;
		esac						
	;;

	download)
		if [ $AUTH_GROUP -eq 0 ];then
			cd ${DESTDOWNLOAD}

			if [ -s ${DESTDOWNLOAD}"/"${TSETUP} ]
			then
				rm -f ${DESTDOWNLOAD}"/"${TSETUP}
			fi

			wget ${TURL}${TSETUP}
			
			if ! [ -s ${DESTDOWNLOAD}"/"${TSETUP} ]
			then	
				exit 1
			fi	
		else
			exit 1
		fi
	;;	
	
	installPackage)
		if [ $AUTH_GROUP -eq 0 ];then

			if ! [ -d $BINDIR ]
			then
				mkdir $BINDIR
			fi
				 
			if ! [ -d $DESTDIR ]
			then
				echo $DESTDIR
				mkdir $DESTDIR
			fi	

			echo "Unzipping file..."
			
			FIRSTPWD=$PWD
			cd $DESTDOWNLOAD
			tar -Jxf $TSETUP -C $DESTDIR
	 		USER_GR=$(id -g -n ${USER})
			chown -R ${USER}:"${USER_GR}" $BINDIR
			
			if [ $? -eq 0 ]
			then	
				cd $FIRSTPWD
				echo "Launching telegram..."
				su -c /usr/bin/telegram $USER &
			else
				rm -r $DESTDIR
				exit 1
			fi
		else
			exit 1
		fi
		
	;;

	remove)
		
		echo "Removing files..."
		if [ -d $DESTDIR ]
		then
			rm -rf $DESTDIR
		fi	

		if [ -f $DESTDESKTOP ]
		then
			rm -f $DESTDESKTOP
		fi	 
	;;		
		
esac
exit 0