#! /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
}

make_account() {
    local u g gcos homeopt home

    u=$1
    g=$2
    gcos=$3
    homeopt=${4:+"-d $4"}

    if pw group show "${g}" >/dev/null 2>&1; then
	echo "You already have a group \"${g}\", so I will use it."
    else
	echo "You need a group \"${g}\"."
	if which -s pw && yesno "Would you like me to create it" y; then
	    pw groupadd ${g} || exit
	    echo "Done."
	else
	    echo "Please create it, and try again."
	    if ! grep -q "^${u}:" /etc/passwd; then
		echo "While you're at it, please create a user \"${u}\" too,"
		echo "with a default group of \"${g}\"."
	    fi
	    exit 1
	fi
    fi
    
    if pw user show "${u}" >/dev/null 2>&1; then
	echo "You already have a user \"${u}\", so I will use it."
    else
	echo "You need a user \"${u}\"."
	if which -s pw && yesno "Would you like me to create it" y; then
	    pw useradd ${u} -g ${g} -h - ${homeopt} \
		-s /nonexistent -c "${gcos}" || exit
	    echo "Done."
	else
	    echo "Please create it, and try again."
	    exit 1
	fi
    fi

    if [ x"$homeopt" = x ]; then
	eval home=~${u}
	if [ ! -d "${home}" ]; then
	    if yesno \
		"Would you like me to create ${u}'s home directory (${home})" y
	    then
		(umask 77 && \
		    mkdir -p ${home}) || exit
		chown -R ${u}:${g} ${home} || exit
	    else
		echo "Please create it, and try again."
		exit 1
	    fi
	fi
    fi
}

if [ "$2" != "PRE-INSTALL" ]; then
    exit 0
fi

USER=www
GROUP=${USER}
UID=80
GID=${UID}

if ! pw groupshow "${GROUP}" 2>/dev/null 1>&2; then
	if pw groupadd ${GROUP} -g ${GID}; then
		echo "Added group \"${GROUP}\"."
	else
		echo "Adding group \"${GROUP}\" failed..."
		exit 1
	fi
fi

if ! pw usershow "${USER}" 2>/dev/null 1>&2; then
	if pw useradd ${USER} -u ${UID} -g ${GROUP} -h - \
		-s "/sbin/nologin" -d "/nonexistent" \
		-c "World Wide Web Owner"; \
	then
		echo "Added user \"${USER}\"."
	else
		echo "Adding user \"${USER}\" failed..."
		exit 1
	fi
fi

make_account smokeping smokeping "SmokePing Daemon" "/nonexistent"
