tcu

#!/usr/bin/env bash

VERSION=1.0.0

BASH=`which bash`
BASH_VERSION=`$BASH --version |head -1 |sed 's/.*version \(.*\)-release.*/\1/' |cut -c 1`
if [ $BASH_VERSION -lt 4 ]; then
	echo "Error: bash must be at least version 4."
	exit 1
fi

# Retrieve script directory (not following link)
SCRIPT="${BASH_SOURCE[0]}"
SCRIPT_DIR="$( cd "$( dirname "${SCRIPT}" )" && pwd )"
INVOCATION_DIR=`pwd`
PDIR="$(dirname "$SCRIPT_DIR")"
BDIR="$(basename "$SCRIPT_DIR")"

# Retrieve script name (follow link)
PROG=`basename "$0"`

# Themes are stored in an array
# key: lowercase theme, value: directory of the theme
declare -A THEME
THEME[dark]=Dark

DFT_THEME=dark

# on macOS, the default getopt is a useless piece of shit
# install getopt via MacPorts or brew and put it in the PATH before /usr/bin
if [ "`getopt -V |cut -d\" \" -f1`" != "getopt" ]; then
	echo "Error: getopt not compatible enough."
	exit 1
fi

function usage {
	echo "usage: ${PROG} [-t|--theme THEME] [-p|--profile PROFILE_DIR] [-x|--no-theme] [-c|--copy] [-d|--debug] [-V|--version] [-h] [--help]"
}

function long_usage {
	echo "${PROG} - Theme Config Utility                                          "
	echo ""
	usage
	echo ""
	echo "       -t, --theme THEME                                                "
	echo "           activate THEME                                               "
	echo "           available themes:                                            "
	for i in ${!THEME[@]}
	do
		echo "              $i"
	done
	echo "              none (same as -x, --no-theme)                             "
	echo ""
	echo "       -p, --profile PROFILE_DIR                                        "
	echo "           Joplin profile directory                                     "
	echo ""
	echo "       -x, --no-theme                                                   "
	echo "           deactivate current theme                                     "
	echo ""
	echo "       -d, --debug                                                      "
	echo "           print debug information                                      "
	echo ""
	echo "       -c, --copy                                                       "
	echo "           copy files instead of creating symbolic links                "
	echo ""
	echo "       -V, --version                                                    "
	echo "           version information                                          "
	echo ""
	echo "       -h                                                               "
	echo "           usage information                                            "
	echo ""
	echo "       --help                                                           "
	echo "           this help                                                    "
	echo ""
}

tflag=0
targ=$DFT_THEME
pflag=0
xflag=0
cflag=0
dflag=0
Vflag=0
hflag=0
hlflag=0

options=$(getopt -n $PROG -q -o t:p:xcdVh -l help,version,debug,theme:,profile:,no-theme,copy -- "$@")
if [ $? != 0 ]
then
	echo "${PROG}: Error: unrecognized option $1"
	usage
	exit 1
fi

eval set -- "$options"

while [ $# -gt 0 ]
do
	case "$1" in
	-t|--theme)
		tflag=1
		targ=${2,,}
		shift;;
	-p|--profile)
		pflag=1
		parg=$2
		shift;;
	-x|--no-theme)
		xflag=1;;
	-c|--copy)
		cflag=1;;
	-V|--version)
		Vflag=1;;
	-d|--debug)
		dflag=1;;
	-h)
		hflag=1;;
	--help)
		hlflag=1;;
	--)
		shift; break;;
	*)
		exit;
		break;;
	esac
	shift
done

if [ "$hflag" == "1" ]; then
	usage
	exit
fi

if [ "$hlflag" == "1" ]; then
	long_usage
	exit
fi

if [ "$Vflag" == "1" ]; then
	echo "$PROG $VERSION"
	exit
fi

function debug {
	if [ "$dflag" == "1" ]; then
		echo "[debug] $@"
	fi
}

if [ "$xflag" == "1" ]; then
	tflag=1
	targ=none
fi

if [ "$tflag" == "0" ]; then
	debug "Using default theme: $DFT_THEME"
fi

if [[ ${THEME[$targ]+_} || $targ == "none" ]]; then
	if [ $targ == "none" ]; then
		THEME_DIR=None
	else
		THEME_DIR=${THEME[$targ]}
	fi
else
	echo "Error: available themes: ${!THEME[@]} none"
	exit
fi

if [ $targ != "none" ]; then
	debug "Theme: $targ [$THEME_DIR]"
else
	debug "Deactivate current theme"
fi

if [ "$pflag" == "1" ]; then
	if [ -d "$parg" ]; then
		PROFILE_DIR="$parg"
	else
		echo "Error: profile directory [$parg] does not exist."
		exit 1
	fi
else
	# Check, if database.sqlite exists in parent dir -> then it's the profile dir
	if [ -f "$PDIR/database.sqlite" ]; then
		PROFILE_DIR="$PDIR"
	elif [ -d "$HOME/.config/joplin-desktop" ]; then
		PROFILE_DIR=$HOME/.config/joplin-desktop
	else
		echo "Error: No profile directory found. Please specify with -p or --profile"
		exit 1
	fi
fi

debug "Profile directory: $PROFILE_DIR"

cd $PROFILE_DIR

# extension for backup file (if target is different than source)
EXT=`date +%Y%m%d%H%M%S`

themefiles=("userchrome.css" "userstyle.css")

# Deactivate theme
if [ $targ == "none" ]; then
	for f in ${themefiles[*]}
	do
		if [ -f $f ]; then
			B=0
			if [ ! -f .theme ]; then
				B=1
			else
				installed=`cat .theme`

				# is the data in the file .theme really a valid theme (key)?
				if [ ! ${THEME[$installed]+_} ]; then
					B=1
				# now check if the current file differs from the one in the theme directory
				elif ! diff -q $f ${SCRIPT_DIR}/${THEME[$installed]}/$f >/dev/null; then
					B=1
				fi
			fi
			if [ $B == 1 ]; then
				debug "Backup $f -> $f.$EXT"
				cp $f $f.$EXT
			fi
			debug "Remove $f"
			rm -f $f
		fi
	done
	rm -f .theme
	echo "Current theme deactivated."
	exit
fi

# Activate theme
for f in ${themefiles[*]}
do
	if [ -f $f ]; then
		# check, if we have to backup
		if ! diff -q $f ${SCRIPT_DIR}/${THEME_DIR}/$f >/dev/null; then
			debug "Backup $f -> $f.$EXT"
			cp $f $f.$EXT
		fi
		rm -f $f
	fi
	# copy or create links
	if [ "$cflag" == "1" ]; then
		debug "copy ${SCRIPT_DIR}/${THEME_DIR}/$f -> $f"
		cp ${SCRIPT_DIR}/${THEME_DIR}/$f .
	else
		# check, if we can use relative links
		if [ -d $BDIR ]; then
			debug "create relative symbolic link [ $f -> $BDIR/${THEME_DIR}/$f]"
			ln -fs $BDIR/${THEME_DIR}/$f $f
		else
			debug "create absolute symbolic link [ $f -> $SCRIPT_DIR/${THEME_DIR}/$f]"
			ln -fs $SCRIPT_DIR/${THEME_DIR}/$f $f
		fi
	fi
done

echo "$targ" >.theme
echo "Theme [$THEME_DIR] activated."