#!/bin/bash
# sync.sh
# 
# this script is written to syncronize the lkd planet..
#
# author: Alper KANAT <alper.kanat@linux.org.tr>

PLANET_DIR="${HOME}/public_html/gezegen"
LOG_DIR="$PLANET_DIR/logs"
LOG_FILE="planet-$(date +"%d.%m.%Y")-TOPLULUK.log"
LOCK_FILE="planet-sync-topluluk.lck"
VERBOSE=0

usage() {
	cat << EOF
Synchronizes the planet by invoking the necessary commands and logges everything.

Options:
	-h, --help         this help
	-p, --planetdir    useful if the planet dir is somewhere else than the 
	                   default one
	-v, --verbose      print the log instead of writing it to the log file..

Usage: $(basename $0) [--help] [--planetdir /path/to/planet]
EOF
}

while (( $# > 0 )); do
	case "$1" in
		--help|-h)
			usage
			shift
			exit 0
			;;

		--planetdir|-p)
			case "$2" in
				[a-zA-Z0-9\/]*)
					PLANET_DIR="$2"
					LOG_DIR="$PLANET_DIR/logs"
					;;

				*)
					usage
					exit 1
					;;
			esac
			shift 2
			;;

		--verbose|-v)
			VERBOSE=1
			shift
			;;

		-*)
			usage
			exit 1
			;;

		?*)
			usage
			exit 1
			;;
	esac
done

# checking planet dir
if [[ ! -d "$PLANET_DIR" ]]; then
	echo "invalid planet directory.. please specify the correct planet dir with --planetdir /path/to/planet"
	exit 1
fi

# checking if the log file created for the current date
if [[ ! -f "$LOG_DIR/$LOG_FILE" ]]; then
	touch "$LOG_DIR/$LOG_FILE"
fi

if [[ -f "$PLANET_DIR/$LOCK_FILE" ]]; then
    cur_date=`date +%Y%m%d%H%M`
    file_date=`cat "$PLANET_DIR/$LOCK_FILE"`
    sub=$((cur_date - file_date))
    #if the difference is bigger than the 10 minutes interval of cron job, that means we have lock file that requires delete
    if [ $sub -gt 15 ]; then
        echo "Removing the lock file" >> "$LOG_DIR/$LOG_FILE" 2>&1
        rm -f "$PLANET_DIR/$LOCK_FILE"
    else
	    echo "there's a sync process running behind, please try again later.."
	    exit 1
fi

	touch "$PLANET_DIR/$LOCK_FILE"
    
    # lets add the runtime of the script to the lock file
    echo "$(date +"%Y%m%d%H%M")" > "$PLANET_DIR/$LOCK_FILE"

	cd "$PLANET_DIR"

	if (( $VERBOSE == 0 )); then
		echo >> "$LOG_DIR/$LOG_FILE" 2>&1
		echo "starting new sync ($(date +"%d.%m.%Y, %H:%M"))" >> "$LOG_DIR/$LOG_FILE" 2>&1
		echo "-----------------------------------------------------------" >> "$LOG_DIR/$LOG_FILE" 2>&1
		"$PLANET_DIR/planet.py" "$PLANET_DIR/gezegen-topluluk/config.ini" >> "$LOG_DIR/$LOG_FILE" 2>&1
		echo "-----------------------------------------------------------" >> "$LOG_DIR/$LOG_FILE" 2>&1
	else
		echo
		echo "starting new sync ($(date +"%d.%m.%Y, %H:%M"))"
		echo "-----------------------------------------------------------"
		"$PLANET_DIR/planet.py" "$PLANET_DIR/gezegen-topluluk/config.ini"
		echo "-----------------------------------------------------------"
	fi

# if ended successfully delete the lock file
rm "$PLANET_DIR/$LOCK_FILE"