#!/bin/bash
die() { printf '%s\n' "$*" >&2; exit 1; }

color=
logged=
mod=
old=
file=current.log

args=$(getopt --options cdmlo --longoptions color,colour,dry-run,debug,logged,mod,old --name "$(basename "$0")" -- "$@") || die "Syntax: $0 [-c|--color|colour] [-l|--logged] [-m|--mod] [-o|--old] <server version>"
eval set -- "$args"

while true
do
        case "$1" in
        -c|--color|--colour)
                color=_color;;
        -l|--logged)
                logged=_logged;;
        -m|--mod)
                mod=_mod;;
        -o|--old)
                old=OLD: file=old.log;;
        --) shift; break;;
        *) printf 'Unhandled option "%s"!\n' "$1" >&2;;
        esac
        shift
done

[ $# -ge 1 ] || die "No server version specified!"
version=$1

params=(-n 0 -F)
[ "$old" ] && params=(-n 0 --pid="$(cat "$HOME/servers/$version/old.pid")" -f)

log="$HOME/servers/$version/$file"
#[ -r "$log" ] || die "Server log file '$log' is not readable!"

filter=logfilter_irc$logged$color

prev=
case $version in *prev) prev=PREV: ;; esac

prefix=
[ "$mod" ] && prefix="$version:" && filter=logfilter_irc$mod
prefix="$prefix$prev$old"

[ "$prefix" ] && fparams=(-e "s/^/$prefix /")

# keep only the pipeline around
shopt -s lastpipe
tail "${params[@]}" "$log" | exec "$filter" --unbuffered "${fparams[@]}"