#!/bin/bash

shopt -s expand_aliases
alias mcscreen='sudo -u minecraft screen'

print_error() {
    >&2 printf '\033[31;1m%s\033[0m \033[1m%s\033[0m\n' ERROR: "$*"
}

public_usage() {
    local name
    name="$(basename "$0")"
    cat << EOF
${name}: utilisation
    ${name} start|status|stop|watch NOM_SERVEUR
    ${name} list
    ${name} usage
EOF
}

error_usage() {
    print_error "Utilisation invalide."
    >&2 public_usage
    return 1
}

public_start() {
    if [ -n "$1" ]; then
        mcscreen -d -m -S "$1" \
            "/srv/minecraft/bin/${1}"
    else
        error_usage
    fi
}

public_status() {
    if [ -n "$1" ]; then
        printf '\033[1m%s\033[0m : ' "$1"
        if mcscreen -ls "$1" > /dev/null 2>&1; then
            echo "en cours d'exécution"
        else
            echo "non en cours d'exécution"
        fi
    else
        error_usage
    fi
}

public_stop() {
    if [ -n "$1" ]; then
        mcscreen -S "$1" -X stuff '^E^Ustop^M'
    else
        error_usage
    fi
}

public_watch() {
    mcscreen -dr "$1"
}

public_list() {
    mcscreen -ls
}

verb="$1"
shift
case "$verb" in
    start|status|stop|watch|list|usage)
        "public_${verb}" "$@"
        ;;
    *)
        error_usage
        ;;
esac