# $Id$

# message only echo | disabled in quiet mode
mecho()
{
	local COLCYAN="\033[1;36m"
	local COLDEFAULT="\033[0m"
	local opts
	local webcrlf

	# print nothing if quiet mode was requested
	[[ ${QUIET} = true ]] && return

	if [[ ${NOCOLORS} = true ]]
	then
		COLCYAN=""
		COLDEFAULT=""
	fi

	[[ ${WEBCRLF} = true ]] && webcrlf="<br>"

	# respect -n
	case $1 in
		-n) shift; opts="n" ;;
	esac

	echo -e${opts} "${COLCYAN}$@${COLDEFAULT}${webcrlf}"
}

# prints error messages | enabled even in quiet mode
eecho()
{
	local COLRED="\033[1;31m"
	local COLDEFAULT="\033[0m"
	local opts
	local webcrlf

	if [[ ${NOCOLORS} = true ]]
	then
		COLRED=""
		COLDEFAULT=""
	fi

	[[ ${WEBCRLF} = true ]] && webcrlf="<br>"

	# respect -n
	case $1 in
		-n) shift; opts="n" ;;
	esac

	echo -e${opts} "${COLRED}$@${COLDEFAULT}${webcrlf}"
}

# prints return values of get | enabled even in quiet mode
rvecho()
{
	local COLPURPLE="\033[1;35m"
	local COLDEFAULT="\033[0m"
	local opts
	local webcrlf

	if [[ ${NOCOLORS} = true ]]
	then
		COLPURPLE=""
		COLDEFAULT=""
	fi

	[[ ${WEBCRLF} = true ]] && webcrlf="<br>"

	# respect -n
	case $1 in
		-n) shift; opts="n" ;;
	esac

	echo -e${opts} "${COLPURPLE}$@${COLDEFAULT}${webcrlf}"
}

# prints debug messages if requested | enabled even in quiet mode
decho()
{
	# print nothing if debug mode was *not* requested
	[[ ${DEBUG} != 1 ]] && return

	eecho "DEBUG: ${@}"
}

# source a file with debug information
include()
{
	local retval

	if [ -f $@ ]
	then
		decho "including '$@'"
		source $@
		retval=$?
	else
		decho "include: '$@' not found"
		retval=1
	fi

	return ${retval}
}

# adds a line to a configuration file defined by the $CONFIG variable
# $CONFIG="/etc/conf.d/mcore" addconfig 'LIBDIR="/usr/lib"'
addconfig()
{
	local opts

	if [[ -z ${CONFIG} ]]
	then
		eecho "You must define \$CONFIG varibale first!"
		return 1
	fi

	if [[ ! -d $(dirname ${CONFIG}) ]]
	then
		install -d $(dirname ${CONFIG})
	fi

	# check for opts
	case $1 in
		-n) shift; opts=" -n" ;;
		-e) shift; opts=" -e" ;;
	esac

	echo ${opts} "$@" >> ${CONFIG}
}

# creates or clears a configuration file defined by the $CONFIG variable
# CONFIG="/etc/conf.d/mcore" clearconfig
clearconfig()
{
	if [[ -z ${CONFIG} ]]
	then
		eecho "You must define \$CONFIG varibale first!"
		return 1
	fi

	if [[ ! -d $(dirname ${CONFIG}) ]]
	then
		install -d $(dirname ${CONFIG})
	fi
	: > ${CONFIG}
}

# root is not allowed to run progs in a user session with newer xorg-servers
# this wrapper runs a command in the xsession of the unpriv_user
x11runas()
{
	if [[ -n $(pidof X) ]] || [[ -n $(pidof Xorg) ]]
	then
		su - "${MCORE_UNPRIV_USER}" -c "DISPLAY=${MCORE_XORG_DISPLAY} $@"
	fi
}

# no_duplicate $list $item
no_duplicate()
{
	local i
	local list="$1"
	local item="$2"

	for i in ${list}
	do
		[[ ${i} = ${item} ]] && return 1
	done

	return 0
}

# checks if given path is empty
path_not_empty()
{
	local path="$1"
	[[ -z ${path} ]] && eecho "path_not_empty(): no path given!" && return 1

	# return ERR if path does not exist
	[[ ! -d ${path} ]] && return 1
	# return ERR if path empty
	[[ -z $(find "${path}" -mindepth 1 -maxdepth 1) ]] && return 1

	# every thing went ok, directory not empty
	return 0
}

# list all files in a given directory
list_files_in_directory()
{
	local i
	local retval
	local path
	local opts
	local type

	# basic getops
	for i in $*
	do
		case $1 in
			-mindepth) shift; opts+=" -mindepth $1" ;;
			-maxdepth) shift; opts+=" -maxdepth $1" ;;
			-type) shift; type="$1" ;;
			-name) shift; opts+=" -name $1" ;;
			'') continue ;;
			*) path="$1" ;;
		esac
		shift
	done

	if [[ -z ${path} ]]
	then
		eecho "No path given."
		return 1
	fi

	if [[ ! -d ${path} ]]
	then
		eecho "Directory '${path}' does not exist."
		return 1
	fi

	# default to files
	[[ -z ${type} ]] && type=f

	for i in $(find ${path} ${opts} -type ${type} -printf '%f\n' | sort)
	do
		if [[ -z ${retval} ]]
		then
			retval="${i}"
		else
			retval+=" ${i}"
		fi
	done

	rvecho "${retval}"
}

# runs a command in the chroot of $MROOT
system_chroot()
{
	local cmd="$@"
	if [[ -z ${MROOT} ]]
	then
		echo "system_chroot(): \$MROOT was not set, doing nothing!"
		return 1
	fi
	if [ ! -d ${MROOT} ]
	then
		eecho "system_chroot(): MROOT='${MROOT}' does not exist."
		return 1
	fi

	chroot ${MROOT} ${cmd}
}

# gets interface used to reach given ip
iface_for_remote_addr()
{
	set -- $(ip -o route get to $1)
	echo $5
}

# get ip from dns name
dns_to_ip()
{
	set -- $(getent hosts $1)
	echo $1
}

iface_for_ip()
{
	set -- $(ip -o addr show to $1)
	echo $2
}

iface_for_mac()
{
	local interface="" mac="$(echo $1 | sed 'y/ABCDEF/abcdef/')"
	for interface in /sys/class/net/*; do
		if [ $(cat $interface/address) = "$mac" ]; then
			echo ${interface##*/}
		fi
	done
}

mac_for_iface()
{
	local iface="$1"
	if [ -f /sys/class/net/${iface}/address ]
	then
		cat /sys/class/net/${iface}/address
	fi
}

certificate_fingerprint()
{
	local cert_fingerprint
	local retval

	if [[ ! -f ${MCORE_CERT_FILE} ]]
	then
		eecho "MCORE_CERT_FILE '${MCORE_CERT_FILE}' does not exist."
		return 1
	fi

	cert_fingerprint=$(openssl x509 -noout -modulus -in "${MCORE_CERT_FILE}" | openssl sha1 | sed 's:(stdin)=\ ::')
	retval="$?"

	if [[ ${retval} != 0 ]]
	then
		eecho "Error '${retval}' while generating cert_fingerprint."
		return 1
	fi

	if [[ -z ${cert_fingerprint} ]]
	then
		eecho "Error: cert_fingerprint is empty"
		return 1
	else
		echo "${cert_fingerprint}"
	fi
}

key_fingerprint()
{
	local key_fingerprint
	local retval

	if [[ ! -f ${MCORE_KEY_FILE} ]]
	then
		eecho "MCORE_KEY_FILE '${MCORE_KEY_FILE}' does not exist."
		return 1
	fi

	key_fingerprint=$(openssl rsa -noout -modulus -in "${MCORE_KEY_FILE}" | openssl sha1 | sed 's:(stdin)=\ ::')
	retval="$?"

	if [[ ${retval} != 0 ]]
	then
		eecho "Error '${retval}' while generating key_fingerprint."
		return 1
	fi

	if [[ -z ${key_fingerprint} ]]
	then
		eecho "Error: key_fingerprint is empty"
		return 1
	else
		echo "${key_fingerprint}"
	fi
}