#! /bin/sh

ask() {
    local question default answer

    question=$1
    default=$2
    if [ -z "${PACKAGE_BUILDING}" ]; then
	read -p "${question} [${default}]? " answer
    fi
    if [ x${answer} = x ]; then
	answer=${default}
    fi
    echo ${answer}
}

yesno() {
    local dflt question answer

    question=$1
    dflt=$2
    while :; do
	answer=$(ask "${question}" "${dflt}")
	case "${answer}" in
	[Yy]*)		return 0;;
	[Nn]*)		return 1;;
	esac
	echo "Please answer yes or no."
    done
}

delete_account() {
    local u g home

    u=$1
    g=$2
    if pw group show ${g} > /dev/null 2>&1; then
	if yesno "Do you want me to remove group \"${g}\"" y; then
	    pw group del -n ${g}
	    echo "Done."
	else
	    GID=`pw group show ${g} | awk -F: '{ print $3 }'`
	fi
    fi
    if pw user show ${u} > /dev/null 2>&1; then
	if yesno "Do you want me to remove user \"${u}\"" y; then
	    eval home=~${u}
	    pw user del -n ${u} -r
	    echo "Done."
	    if [ -d "${home}" ]; then
		echo "Please remember to remove the home directory \"${home}\""
	    fi

	    # pw user del may have removed the group, too.
	    # Put it back if the admin asked us to retain it.
	    if [ -n "$GID" ]; then
		pw group show ${g} > /dev/null 2>&1
		if [ $? -ne 0 ]; then
		    pw group add ${g}
		fi
	    fi
	fi
    fi
}

delete_crontab_entries() {
    local b e
    b=$1
    e=$2

    TMPFILE=`mktemp -t munin` || exit 1
    crontab -u munin -l | sed -e "/^$b\$/,/^$e\$/d" -e '/^[ 	]*#/d' -e '/^$/d' > $TMPFILE
    if [ -s $TMPFILE ]; then
	crontab -u munin -l | sed -e "/^$b\$/,/^$e\$/d" | crontab -u munin -
	echo "The crontab for user munin had manually created entries."
	echo "Only the automatically created entries have been removed."
	echo "These are the remaining lines:"
	crontab -u munin -l
    else
	crontab -u munin -r
	echo "crontab for user munin removed"
    fi
    rm $TMPFILE
}

delnewsyslog() {
    tmp="/etc/#munin-node$$"
    sed -e '/^\/var\/log\/munin-main\/\*[       ]/d' /etc/newsyslog.conf >${tmp}
    cat ${tmp} > /etc/newsyslog.conf
    rm ${tmp}
}

newsyslog() {
    ENTRY=`fgrep '/var/log/munin-main/*' /etc/newsyslog.conf`
    DEFAULT='/var/log/munin-main/*	munin:munin	644  7	   *	@T00  GNWZ'
    if [ -z "$ENTRY" ]; then
        exit 0
    elif [ "$ENTRY" = "$DEFAULT" ]; then
        delnewsyslog
    elif yesno "You have changed the default munin-main entry in \"/etc/newsyslog.conf\".
Do you want me to delete it?" y; then
        delnewsyslog
        echo "Done."
    fi
}


case $2 in
    DEINSTALL)
	delete_crontab_entries '#BEGIN_MUNIN' '#END_MUNIN'
	newsyslog
	;;
    POST-DEINSTALL)
	delete_account munin munin
	;;
esac
