#!/bin/sh
#
# Script to export configuration files
# Parameters:
#  $1: password used to encrypt the configuration file
#  $2: (optional) path where to save the configuration file.
#      If not gives it search for the first mounted SD card partition

# set -u
# Configuration
EXPORTER=/home/tool/bin/7za
#Exclude two files from backup
FILE_LIST="-r /home/tool/config/* -x!.* -x!log -x!langs -x!ChanCfg.json -x!w1_backup -x!default -x!wlan/suppl"

# check exporter
if [ ! -e $EXPORTER ]; then
  echo "Exporter not found" >&2
  exit 1
fi

# password check
if [ $#  -eq 0 ]; then
  echo "Password required" >&2
  exit 1
fi
PWD=$1
if [ "$PWD" = "" ]; then
  echo "No empty password" >&2
  exit 1
fi

###
if [ $#  -eq 1 ]; then
  echo "Export file name required" >&2
  exit 1
fi
EXPORTFNAME=$2
if [ "$EXPORTFNAME" = "" ]; then
  echo "Empty export file name given" >&2
  exit 1
fi
CFG_FILE=$EXPORTFNAME
###
if [ $# -gt 2 ]; then
  # use provided path
  TARGET_FILE=$3/$CFG_FILE

else
  # use SD card

  # check SD
  BLOCK_LIST=$(find /sys/class/block/mmcblk* -maxdepth 0 2>/dev/null)
  if [ ! $? -eq 0 ]; then
    echo "No SD card" >&2
    exit 1
  fi

  # get SD mount path
  PART_LIST=$(find /sys/class/block/mmcblk*p* -maxdepth 0 2>/dev/null)
  if [ ! $? -eq 0 ]; then
    # No partitions
    DEV_PATH=$(find /sys/class/block/mmcblk* -maxdepth 0 | head -n 1)
  else
    # Partitions. get the first
    DEV_PATH=$(find /sys/class/block/mmcblk*p* -maxdepth 0 | head -n 1)
  fi
  SD_PATH=/mnt/mmc/$(basename $DEV_PATH)
  if [ ! -e $SD_PATH ];then
    echo "SD card not mounted" >&2
    exit 1
  fi
  TARGET_FILE=$SD_PATH/$CFG_FILE
fi

# remove previous archives
DIR_NAME=`dirname $TARGET_FILE`
CFG_FILES=`ls $DIR_NAME/*.nxcfg`
rm -f $CFG_FILES

$EXPORTER a -t7z -mx=1 $TARGET_FILE $FILE_LIST -p$PWD > /dev/null
sync
RETVAL=$?

if [ $RETVAL -eq 0 ];then
  echo Success
fi
if [ $RETVAL -ne 0 ];then
  echo Failure
fi

exit $RETVAL