170 lines
5.2 KiB
Bash
170 lines
5.2 KiB
Bash
#!/usr/bin/env bash
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#!/bin/bash
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# Beschreibung: Minecraft → ntfy Notifier (Join/Leave + optional Up/Down)
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# Autor: Patrick Asmus
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# Web: https://www.cleveradmin.de
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# Repository: https://git.techniverse.net/scriptos/minecraft-ntfy-notify
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# Version: 1.2
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# Datum: 18.09.2025
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# Modifikation: Spielername in Meldungen in Anführungszeichen gesetzt; Sanitizing beibehalten
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#####################################################
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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if [[ -f "${SCRIPT_DIR}/.env" ]]; then
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set -a
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. "${SCRIPT_DIR}/.env"
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set +a
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fi
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# ===== Konfiguration via ENV =====
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MC_HOST="${MC_HOST:-127.0.0.1}"
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RCON_PORT="${RCON_PORT:-25575}"
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RCON_PASSWORD="${RCON_PASSWORD:-changeme}"
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POLL_SECONDS="${POLL_SECONDS:-10}"
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ANNOUNCE_SERVER_UPDOWN="${ANNOUNCE_SERVER_UPDOWN:-true}"
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# ntfy
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NTFY_SERVER="${NTFY_SERVER:-}"
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NTFY_TOPIC="${NTFY_TOPIC:-}"
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NTFY_TOKEN="${NTFY_TOKEN:-}"
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NTFY_TITLE_PREFIX="${NTFY_TITLE_PREFIX:-Minecraft}"
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NTFY_TAGS_BASE="${NTFY_TAGS_BASE:-minecraft}"
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NTFY_PRIORITY_JOIN="${NTFY_PRIORITY_JOIN:-3}"
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NTFY_PRIORITY_LEAVE="${NTFY_PRIORITY_LEAVE:-3}"
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NTFY_PRIORITY_UP="${NTFY_PRIORITY_UP:-4}"
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NTFY_PRIORITY_DOWN="${NTFY_PRIORITY_DOWN:-5}"
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NTFY_MARKDOWN="${NTFY_MARKDOWN:-false}"
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# State (standardmäßig im Script-Ordner, root-frei)
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STATE_DIR="${STATE_DIR:-${SCRIPT_DIR}/state}"
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STATE_PLAYERS="${STATE_DIR}/players.prev"
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STATE_UP="${STATE_DIR}/server_up.prev"
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# Optional Debug
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DEBUG="${DEBUG:-false}"
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# ===== Helpers =====
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die() { echo "ERROR: $*" >&2; exit 1; }
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need_bin() { command -v "$1" >/dev/null 2>&1 || die "Benötigtes Tool fehlt: $1"; }
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dbg() { [[ "$DEBUG" == "true" ]] && echo "DBG: $*" >&2 || true; }
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ntfy_notify() {
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local title="$1" body="$2" tags="$3" priority="$4"
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[[ -z "$NTFY_SERVER" || -z "$NTFY_TOPIC" ]] && { echo "ntfy Server/Topic fehlt – skip"; return 1; }
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local url="${NTFY_SERVER%/}/${NTFY_TOPIC}"
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local args=(-sS -X POST "$url" -H "Title: ${title}" -H "Priority: ${priority}" -H "Tags: ${tags}")
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[[ "$NTFY_MARKDOWN" == "true" ]] && args+=(-H "Markdown: yes")
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[[ -n "$NTFY_TOKEN" ]] && args+=(-H "Authorization: Bearer ${NTFY_TOKEN}")
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curl "${args[@]}" --data-raw "$body" >/dev/null 2>&1 || return 1
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return 0
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}
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ensure_state() {
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mkdir -p "$STATE_DIR"
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touch "$STATE_PLAYERS"
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[[ -f "$STATE_UP" ]] || echo "unknown" >"$STATE_UP"
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}
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# Strippt ANSI-Escape-Sequenzen, MC-Farbcodes (§x), CR und Steuerzeichen
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sanitize() {
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sed -E $'s/\x1B\\[[0-9;]*[A-Za-z]//g' \
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| sed -E 's/§[0-9A-FK-ORa-fk-or]//g' \
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| tr -d '\r' \
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| sed -E 's/[\x00-\x1F\x7F]//g'
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}
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get_players() {
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local out
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if ! out=$(mcrcon -H "$MC_HOST" -P "$RCON_PORT" -p "$RCON_PASSWORD" "list" 2>/dev/null); then
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return 1
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fi
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dbg "RAW: $out"
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out="$(printf '%s' "$out" | sanitize)"
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# "There are 0 of a max of 20 players online"
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# "There are 2 of a max of 20 players online: Alice, Bob"
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if ! grep -q "players online:" <<<"$out"; then
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return 0
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fi
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local names="${out#*:}"
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names="$(echo "$names" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')"
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if [[ -z "$names" ]]; then
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return 0
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fi
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printf '%s\n' "$names" \
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| tr ',' '\n' \
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| sed 's/^[[:space:]]*//;s/[[:space:]]*$//' \
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| sed '/^$/d' \
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| LC_ALL=C sort -u
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return 0
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}
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# ===== Checks =====
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need_bin curl
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need_bin mcrcon
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[[ -n "${NTFY_SERVER}" && -n "${NTFY_TOPIC}" ]] || die "NTFY_SERVER/NTFY_TOPIC nicht gesetzt"
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ensure_state
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echo "Starte Polling ${MC_HOST}:${RCON_PORT} → ntfy ${NTFY_SERVER}/${NTFY_TOPIC}"
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prev_up="$(cat "$STATE_UP")"
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while :; do
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tmp_players="$(mktemp)"
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if get_players >"$tmp_players"; then
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server_up="true"
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else
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server_up="false"
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: >"$tmp_players"
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fi
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if [[ "$ANNOUNCE_SERVER_UPDOWN" == "true" && "$prev_up" != "unknown" && "$server_up" != "$prev_up" ]]; then
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if [[ "$server_up" == "true" ]]; then
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ntfy_notify "${NTFY_TITLE_PREFIX}: Server up" \
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"Server ist wieder erreichbar (${MC_HOST}:${RCON_PORT})." \
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"${NTFY_TAGS_BASE},up" "$NTFY_PRIORITY_UP" || true
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else
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ntfy_notify "${NTFY_TITLE_PREFIX}: Server down" \
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"Server ist nicht erreichbar (${MC_HOST}:${RCON_PORT})." \
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"${NTFY_TAGS_BASE},down" "$NTFY_PRIORITY_DOWN" || true
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fi
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fi
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if [[ "$server_up" == "true" ]]; then
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LC_ALL=C sort -u "$STATE_PLAYERS" -o "$STATE_PLAYERS"
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joined="$(comm -13 "$STATE_PLAYERS" "$tmp_players" || true)"
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left="$(comm -23 "$STATE_PLAYERS" "$tmp_players" || true)"
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if [[ -n "$joined" ]]; then
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while IFS= read -r name; do
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[[ -z "$name" ]] && continue
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ntfy_notify "${NTFY_TITLE_PREFIX}: Join" \
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"Player \"${name}\" ist beigetreten." \
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"${NTFY_TAGS_BASE},join" "$NTFY_PRIORITY_JOIN" || true
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done <<<"$joined"
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fi
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if [[ -n "$left" ]]; then
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while IFS= read -r name; do
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[[ -z "$name" ]] && continue
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ntfy_notify "${NTFY_TITLE_PREFIX}: Leave" \
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"Player \"${name}\" hat den Server verlassen." \
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"${NTFY_TAGS_BASE},leave" "$NTFY_PRIORITY_LEAVE" || true
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done <<<"$left"
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fi
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mv "$tmp_players" "$STATE_PLAYERS"
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else
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rm -f "$tmp_players"
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fi
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echo -n "$server_up" >"$STATE_UP"
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prev_up="$server_up"
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sleep "$POLL_SECONDS"
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done
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