#!/bin/sh
TMP=/var/log/setup/tmp
if [ ! -d $TMP ]; then
	mkdir -p $TMP
fi

. /usr/lib/setup/INCISO

if [ -f $TMP/Punattended ]; then
	eval $(grep "^REMOTE_URL=" $TMP/Punattended)
	eval $(grep "^REMOTE_ROOT=" $TMP/Punattended)
fi

REMOTE_SERVER=$REMOTE_URL
REMOTE_PATH=$REMOTE_ROOT

while [ 0 ]; do
	rm -f $TMP/SeTDS $TMP/SeTmount $TMP/SeTsource $TMP/SeTremotesvr

	umount -f /var/log/mount 2>/dev/null
	if [ -n "$(mount | grep /var/log/mount)" -o -d /var/log/mount/lost+found -o -d /var/log/mount/recycled -o -r /var/log/mount/io.sys ]; then
		cat <<- EOF > $TMP/tempmsg
		
		Setup failed to unmount a required directory:
		
		/var/log/mount
		
		Please reboot the machine an try again.
		
		EOF
		dialog \
		  --title "ERROR" \
		  --yes-label "REBOOT" \
		  --no-label "CANCEL" \
		  --yesno "$(cat $TMP/tempmsg)" \
		  11 70
		RET=$?
		rm -f $TMP/tempmsg
		if [ $RET -eq 0 ]; then
			reboot
		else
			exit 1
		fi
	fi

	while [ 0 ]; do
		cat <<- EOF > $TMP/tempmsg
		
		Please provide the URL of a server containing the contents
		(or an ISO image) of a Salix installation disc.
		
		Examples: http://mydomain.com
		          ftp://192.168.1.101
		 
		EOF
		dialog \
		  --title "HTTP/FTP SERVER" \
		  --inputbox "$(cat $TMP/tempmsg)" \
		  14 70 \
		  $REMOTE_SERVER \
		  2> $TMP/remote
		RET=$?
		REMOTE_SERVER="$(cat $TMP/remote)"
		rm -f $TMP/tempmsg $TMP/remote
		if [ $RET -ne 0 ]; then
			exit 1
		elif [ ! $(echo $REMOTE_SERVER | grep -iE '^http://|^ftp://') ]; then
			# subtle hint
			REMOTE_SERVER="?://$SERVER"
			continue
		fi
		break
	done

	cat <<- EOF > $TMP/tempmsg
	
	Now please provide the path to a directory on the server
	containing the contents of a Salix installation disc.
	
	Example: /mirror/salix-xfce
	
	Note: If you are installing from a web (HTTP) server you may also
	specify an ISO image as the source e.g. /mirror/salix-xfce.iso
	 
	EOF
	dialog \
	  --title "SELECT SOURCE DIRECTORY" \
	  --inputbox "$(cat $TMP/tempmsg)" \
	  16 70 \
	  $REMOTE_PATH \
	  2> $TMP/sourcedir
	RET=$?
	REMOTE_PATH="$(cat $TMP/sourcedir)"
	rm -f $TMP/sourcedir $TMP/tempmsg
	if [ $RET -ne 0 ]; then
		continue
	fi

	mkdir -p /var/log/mount 2>/dev/null
	# attempt to mount an ISO over a HTTP connection.
	if [ -n "$(echo $REMOTE_SERVER | grep -i '^http://')" -a -n "$(echo $REMOTE_PATH | grep -i '\.iso$')" ]; then
		cat <<- EOF > $TMP/tempmsg
		
		It appears you have chosen to use the following ISO image:
		
		$(basename $REMOTE_PATH)

		Setup will now attempt to mount it inside a local directory.

		EOF
		dialog \
		  --title "INFORMATION" \
		  --exit-label "OK" \
		  --textbox "$TMP/tempmsg" \
		  11 70
		rm -f $TMP/tempmsg

		sh /etc/rc.d/rc.fuse start
		if [ $? -eq 1 ]; then
			cat <<- EOF > $TMP/tempmsg
			
			Setup failed to start the FUSE service.

			Please check and try again.
			
			EOF
			dialog \
			  --title "SERVICE FAILURE" \
			  --exit-label "OK" \
			  --textbox "$TMP/tempmsg" \
			  9 70
			rm -f $TMP/tempmsg
			continue
		fi
		
		# mount the file inside a directory.
		if [ -x $(type -path httpfs2) ]; then
			httpfs2 -c /dev/null $REMOTE_SERVER$REMOTE_PATH /var/log/mount
			if [ $? -ne 0 ]; then
				cat <<- EOF > $TMP/tempmsg
				
				Failed to mount file from HTTP server:
			
				$REMOTE_SERVER$REMOTE_PATH
				
				Please check and try again.
				
				EOF
				dialog \
				  --title "MOUNT FAILURE" \
				  --exit-label "OK" \
				  --textbox "$TMP/tempmsg" \
				  11 70
				rm -f $TMP/tempmsg
				continue
			else
				cat <<- EOF > $TMP/tempmsg
				
				Successfully mounted file from HTTP server:
				
				$(mount | grep /var/log/mount)
				 
				EOF
				dialog \
				  --title "MOUNT SUCCESS" \
				  --exit-label "OK" \
				  --textbox "$TMP/tempmsg" \
				9 70
				rm -f $TMP/tempmsg
			fi
		else
			cat <<- EOF > $TMP/tempmsg
			
			Setup failed to execute a required command:
		
			httpfs2
			
			Please check and try again.
			
			EOF
			dialog \
			  --title "COMMAND NOT FOUND" \
			  --exit-label "OK" \
			  --textbox "$TMP/tempmsg" \
			  11 70
			rm -f $TMP/tempmsg
			continue
		fi

		# attempt to loop mount the file
		check_iso_image /var/log/mount /var/log/mntiso
		if [ $? -eq 0 ]; then
			if [ -d /var/log/mntiso/salix ]; then
				echo "/var/log/mntiso/salix" > $TMP/SeTDS
			else
				cat <<- EOF > $TMP/tempmsg
				
				The ISO image you specified is not valid:
				
				$(basename $SOURCEISO)
					
				Please check and try again.
				 
				EOF
				dialog \
				  --title "INVALID ISO IMAGE" \
				  --exit-label "OK" \
				  --textbox "$TMP/tempmsg" \
				  11 70
				rm -f $TMP/tempmsg
				umount -f /var/log/mntiso 2>/dev/null
				continue
			fi
		else
			cat <<- EOF > $TMP/tempmsg
			
			The file you specified is not valid:
			
			$REMOTE_SERVER$REMOTE_PATH
			
			Please check and try again.
			 
			EOF
			dialog \
			  --title "INVALID SOURCE FILE" \
			  --exit-label "OK" \
			  --textbox "$TMP/tempmsg" \
			  11 70
			rm -f $TMP/tempmsg
			continue
		fi
	# attempt to fetch individual packages from the server
	else
		cat <<- EOF > $TMP/tempmsg
		
		We will now attempt to download a repository information file
		from the server.
		
		If this is successful we will use it to create a local cache of
		the packages we want to install.
	
		EOF
		dialog \
		  --title "INFORMATION" \
			  --exit-label "OK" \
			  --textbox "$TMP/tempmsg" \
		  11 70
		rm -f $TMP/tempmsg
	
		mkdir -p $TMP/pkgrepo 2>/dev/null
		chmod 700 $TMP/pkgrepo
		rm -rf $TMP/pkgrepo/* 2>/dev/null
		mkdir -p /var/log/mount 2>/dev/null
		ln -sf $TMP/pkgrepo /var/log/mount/
		cd /var/log/mount/pkgrepo
		
		dialog \
		  --infobox "\nDownloading file...\n" \
		  5 23

		wget -q -c $REMOTE_SERVER$REMOTE_PATH/PACKAGES.TXT.gz
		if [ $? -ne 0 ]; then
			cat <<- EOF > $TMP/tempmsg
			
			Failed to download repository information file:
			
			$REMOTE_SERVER$REMOTE_PATH/PACKAGES.TXT.gz
			
			Please check and try again.
			
			EOF
			dialog \
			  --title "DOWNLOAD FAILURE" \
			  --exit-label "OK" \
			  --textbox "$TMP/tempmsg" \
			  11 70
			rm -f $TMP/tempmsg
			continue
		elif [ -z "$(gzip -dc PACKAGES.TXT.gz | grep 'PACKAGE ')" ]; then
			cat <<- EOF > $TMP/tempmsg
			
			The repository information file is not valid:
			
			$REMOTE_SERVER$REMOTE_PATH/PACKAGES.TXT.gz
			
			Please check and try again.
			 
			EOF
			dialog \
			  --title "INVALID FILE" \
			  --exit-label "OK" \
			  --textbox "$TMP/tempmsg" \
			  11 70
			rm -f $TMP/tempmsg
			continue
		else
			# create a local repository with zero-byte package placeholders:
			TOTALP=$(gzip -dc PACKAGES.TXT.gz | grep "PACKAGE NAME:" | wc -l)
			(
				NUMPKG=0
				GAUGE=0
				gzip -dc PACKAGES.TXT.gz | grep "PACKAGE " | while read REPLY ; do
					case "$REPLY" in
						"PACKAGE NAME:"*)
							TEMP=$(echo $REPLY | cut -d: -f2)
							PKGNAME=$(echo $TEMP)
							PKGBASE=${PKGNAME/.t[glbx]z}
							let NUMPKG=NUMPKG+1
							if [ $(( ((100 * $NUMPKG)/$TOTALP)/5 )) -gt $(( $GAUGE/5 )) ]; then
								GAUGE=$(( (100 * $NUMPKG)/$TOTALP ))
								echo "$GAUGE"
							fi
							;;
						"PACKAGE LOCATION:"*)
							TEMP=$(echo $REPLY | cut -d: -f2)
							PKGDIR=$(echo $TEMP)
							mkdir -p $PKGDIR
							touch $PKGDIR/$PKGNAME
							;;
						"PACKAGE SIZE (compressed):"*)
							TEMP=$(echo $REPLY | cut -d: -f2)
							PKGSIZE=$(echo $TEMP)
							echo "$PKGSIZE" 1> $PKGDIR/$PKGBASE.size
							;;
						*)
							;;
					esac
				done \
			) |  \
				dialog \
				  --title "INITIALISING PACKAGE REPOSITORY" \
				  --gauge "\nProcessing $TOTALP Salix packages..." \
				  8 65

			echo "/var/log/mount/pkgrepo/salix" > $TMP/SeTDS
			echo "$REMOTE_SERVER,$REMOTE_PATH" > $TMP/SeTremotesvr 
		fi
	fi
	echo "-source_mounted" > $TMP/SeTmount
	echo "/dev/null" > $TMP/SeTsource
	break
done