#!/bin/bash
#shellcheck disable=SC1090

. "$(sfpath)" || exit 3

shellfu import pretty
shellfu import saturnin

usage() {
    mkusage "$@" "[options]" \
        -- \
            "Print current session id and exit with 0 or 1 if there is no"   \
            "active session."                                                \
        -o                                                                   \
            "-d DIR     Set JAT workdir to DIR.  This is where state data"   \
            "           is kept.  Default: /var/tmp/jat."
}

sessid() {
    #
    # Show session id or exit with 1
    #
    local sess="$SDir/session"
    debug -v sess
    test -f "$sess" || return 1
    test -s "$sess" || return 1
    grep . "$sess"  || return 1
    return 0
}

main() {
    local SDir=$JAT__DIR
    while true; do case $1 in
        -d) SDir=$2;   shift 2 || usage -w "missing SDIR" ;;
        -*) usage ;;
        *)  break ;;
    esac done
    test -n "$SDir" && SDir=$(saturnin__conf -j -1 jattool.sdir)
    test -n "$SDir" || SDir=/var/tmp/jat
    debug -v SDir
    sessid
}

main "$@"