#!/bin/sh -e

installtarget=/usr/local/bin
chatlogdir=/var/log/bunkchat
chatlog=chat.log

chattrfailed() {
    set +e
    rm -rf $chatlogdir
    echo
    echo "ERROR: could not set append only attribute in ${chatlogdir}"
    echo "       does your filesystem support 'chattr +a' ?"
    exit 1
}

prep() {
    mkdir -p $chatlogdir
    chmod 755 $chatlogdir
    touch ${chatlogdir}/${chatlog}
    chmod 666 ${chatlogdir}/${chatlog}
    # if chattr +a not supported on this file system, catch error and clean up
    chattr +a ${chatlogdir}/${chatlog} || chattrfailed
}

install() {
    cp proclaim heed scry $installtarget
    chmod 755 ${installtarget}/proclaim
    chmod 755 ${installtarget}/heed
    chmod 755 ${installtarget}/scry
    chown root:root ${installtarget}/proclaim
    chown root:root ${installtarget}/heed
    chown root:root ${installtarget}/scry
    echo
    echo "SUCCESS! bunkchat installed!"
    exit 0
}

# check for root perms
if ! [ "$(id -u)" = 0 ]; then
    echo
    echo "ERROR: please run install with root permission" >&2
    exit 1
fi

# if chat.log exists, skip prep
if [ -f ${chatlogdir}/${chatlog} ]; then
    install
else
    prep
    install
fi