#!/bin/sh

# Script to launch an automated backupmenu run
# Requires: backupmenu

# Target directory where to find our backups
LOCALDIR="/media/mmc1/systemBackups";

# Number of individual archives to keep; if you backup rootfs + optfs then set this to DOUBLE the number of backup sets you want
# THIS WILL DELETE BACKUPS OUT OF THE DIRECTORY ABOVE. UNDERSTAND THAT BEFORE YOU USE IT. SET KEEP=999 to effectively disable.
KEEP=4

# Begin script

error() {
msg=$@
dbus-send --type=method_call --dest=org.freedesktop.Notifications /org/freedesktop/Notifications org.freedesktop.Notifications.SystemNoteDialog string:"$msg" uint32:0 string:"OK";
exit 1;
}

# Check if we are on a GSM call and abort silently if so
TEST=`dbus-send --system --type=method_call --print-reply --dest=com.nokia.csd.Call /com/nokia/csd/call/1 com.nokia.csd.Call.Instance.GetStatus | grep -o "uint32 0"`;
if [ -z "$TEST" ]; then
	exit 1;
fi;

# First check that we are on charge and abort silently if we are not
TEST=`hal-device bme | grep -o "maemo.charger.connection_status = 'connected'"`
if [ -z "$TEST" ]; then
	exit 1;
fi;

# Check that the target directory is readable, error out if not
if [ ! -r "$LOCALDIR" ]; then
	error "AutoBackupMenu was launched but could not find $LOCALDIR. Is your MMC card mounted?"
fi

# Remove all but the latest $KEEP backups, setting KEEP=4 and backing up nightly will give you 3 days' worth.
ls -1 $LOCALDIR > /tmp/.backups
cat /tmp/.backups | tail -n $KEEP > /tmp/.keep
comm -3 /tmp/.backups /tmp/.keep > /tmp/.lose
cd $LOCALDIR
cat /tmp/.lose | xargs rm -f

# Now check whether we have sufficient space on the microSD card
if [ `df|grep mmc1|awk {'print $4'}` -lt 2097152 ]; then 
	error "AutoBackupMenu was launched, but was aborted as there is less than 2GB free on your microSD card."
	exit 1; 
fi 

# Maybe insert here a check for larger OptFS, will 2GB free be sufficient?

# A few more sanity checks. We don't want to set /autobackupmenu and reboot unless and until we believe 
# it stands a good chance of working.

if [ ! -x "/usr/share/backupmenu/AutoBackupMenu.item" ]; then
	error "AutoBackupMenu could not find /usr/share/backupmenu/AutoBackupMenu.item and assumes that it is not correctly installed. Aborting."
fi

if [ -z `grep -o AutoBackupMenu /usr/share/backupmenu/BackupMenuLauncher.item` ]; then
	error "AutoBackupMenu could not find itself mentioned in /usr/share/backupmenu/BackupMenuLauncher.item and assumes that it is not correctly installed. Aborting."
fi

if [ -z `grep -o /autobackupmenu /sbin/preinit` ]; then
	error "AutoBackupMenu could not find itself mentioned in /sbin/preinit and assumes that it is not correctly installed. Aborting."
fi

# OK, good enough for us. Let's do it.

touch /autobackupmenu
reboot