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#!/usr/bin/env node
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// -*- coding: utf-8 -*-
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// U-Bahn Anzeige – angepasst für 480x360 (BGRA8888)
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const axios = require("axios");
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const fs = require("fs");
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const { createCanvas, registerFont } = require("canvas");
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// ---- Konfiguration ----
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let config = {
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device: "/dev/fb0",
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format: "BGRA8888",
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width: 480,
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height: 360
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};
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try {
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if (fs.existsSync("display_config.json")) {
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const savedConfig = JSON.parse(fs.readFileSync("display_config.json", "utf8"));
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config = { ...config, ...savedConfig };
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console.log("✓ Display-Konfiguration geladen");
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} else {
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console.log("! Keine display_config.json gefunden, nutze Defaults");
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}
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} catch (e) {
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console.log("! Fehler beim Laden der Config:", e.message);
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}
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// Die Stations ID findest du unter
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// "https://v6.vbb.transport.rest/locations?query=U_amrummer_stra%C3%9Fe&results=1"
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// Das ist für die Amrumer Straße. Siehe hier: ^^^^^^^^^^^^^
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const STATION_ID = "900009101";
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const API_URL = `https://v6.vbb.transport.rest/stops/${STATION_ID}/departures`;
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const FB_DEVICE = config.device;
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const WIDTH = config.width;
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const HEIGHT = config.height;
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const FORMAT = config.format;
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// Farben
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const BG = { r: 45, g: 55, b: 70 };
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const YELLOW = { r: 255, g: 220, b: 0 };
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const U9_ORANGE = { r: 255, g: 110, b: 0 };
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const WHITE = { r: 255, g: 255, b: 255 };
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const GRAY = { r: 130, g: 130, b: 130 };
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console.log("\n╔═══════════════════════════════════════════╗");
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console.log("║ U-BAHN ANZEIGE AMRUMER STR. ║");
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console.log("╚═══════════════════════════════════════════╝\n");
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console.log(`Device: ${FB_DEVICE}`);
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console.log(`Format: ${FORMAT}`);
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console.log(`Auflösung: ${WIDTH}x${HEIGHT}\n`);
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function log(level, message) {
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const timestamp = new Date().toISOString();
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console.log(`${timestamp} ${level}: ${message}`);
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}
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class Display {
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constructor() {
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log("INFO", "Display init gestartet");
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this.departures_cache = [];
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this.running = true;
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this.fb = null;
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this.draw_count = 0;
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process.stdout.write("\x1B[?25l"); // Cursor ausblenden
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try {
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registerFont("/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf", { family: "DejaVuSans" });
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log("INFO", "Font geladen");
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} catch (e) {
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log("WARNING", `Font-Fehler: ${e.message}`);
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}
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this.openFramebuffer();
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process.on("SIGTERM", () => this.onSignal("SIGTERM"));
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process.on("SIGINT", () => this.onSignal("SIGINT"));
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this.startApiLoop();
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}
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openFramebuffer() {
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try {
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if (!fs.existsSync(FB_DEVICE)) {
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log("ERROR", `${FB_DEVICE} existiert nicht!`);
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return;
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}
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this.fb = fs.openSync(FB_DEVICE, "r+");
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log("INFO", `Framebuffer geöffnet: ${FB_DEVICE}`);
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const clearBuf = Buffer.alloc(WIDTH * HEIGHT * 4);
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for (let i = 0; i < WIDTH * HEIGHT; i++) {
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const offset = i * 4;
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clearBuf[offset] = BG.b;
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clearBuf[offset + 1] = BG.g;
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clearBuf[offset + 2] = BG.r;
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clearBuf[offset + 3] = 255;
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}
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fs.writeSync(this.fb, clearBuf, 0, clearBuf.length, 0);
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log("INFO", "Display bereit");
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} catch (e) {
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log("ERROR", `Framebuffer-Fehler: ${e.message}`);
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if (e.code === "EACCES") log("ERROR", `Lösung: sudo chmod 666 ${FB_DEVICE}`);
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}
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}
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onSignal(signum) {
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log("INFO", `Signal ${signum} empfangen, beende...`);
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this.running = false;
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process.stdout.write("\x1B[?25h");
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if (this.fb !== null) fs.closeSync(this.fb);
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process.exit(0);
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}
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startApiLoop() {
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const fetchData = async () => {
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if (!this.running) return;
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try {
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const response = await axios.get(`${API_URL}?duration=60&results=50`, { timeout: 10000 });
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const data = response.data;
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let u9 = [];
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if (data?.departures) u9 = data.departures.filter(d => d.line?.name === "U9");
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else if (Array.isArray(data)) u9 = data.filter(d => d.line?.name === "U9");
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this.departures_cache = u9;
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log("INFO", `API-Update: ${u9.length} U9-Bahnen`);
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} catch (e) {
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log("WARNING", `API-Fehler: ${e.message}`);
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}
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};
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fetchData();
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setInterval(fetchData, 20000);
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}
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mins(when) {
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try {
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let whenStr = when;
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if (whenStr.endsWith("Z")) whenStr = whenStr.slice(0, -1) + "+00:00";
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const dep = new Date(whenStr);
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const diff = (dep - new Date()) / 60000;
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return diff >= 0.5 ? String(Math.floor(diff)) : "0";
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} catch {
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return "--";
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}
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}
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roundRect(ctx, x, y, w, h, r) {
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ctx.beginPath();
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ctx.moveTo(x + r, y);
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ctx.lineTo(x + w - r, y);
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ctx.quadraticCurveTo(x + w, y, x + w, y + r);
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ctx.lineTo(x + w, y + h - r);
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ctx.quadraticCurveTo(x + w, y + h, x + w - r, y + h);
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ctx.lineTo(x + r, y + h);
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ctx.quadraticCurveTo(x, y + h, x, y + h - r);
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ctx.lineTo(x, y + r);
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ctx.quadraticCurveTo(x, y, x + r, y);
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ctx.closePath();
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ctx.fill();
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}
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draw() {
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if (!this.fb) return;
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const canvas = createCanvas(WIDTH, HEIGHT);
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const ctx = canvas.getContext("2d");
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// Hintergrund
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ctx.fillStyle = `rgb(${BG.r},${BG.g},${BG.b})`;
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ctx.fillRect(0, 0, WIDTH, HEIGHT);
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// Header
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ctx.fillStyle = `rgb(${YELLOW.r},${YELLOW.g},${YELLOW.b})`;
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ctx.fillRect(0, 0, WIDTH, 70);
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// --- U-Bahn Symbol (blau mit weißem U) ---
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const uBoxX = 15;
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const uBoxY = 10;
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const uBoxSize = 50;
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// Hintergrund des Symbols (blau)
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ctx.fillStyle = "rgb(0, 80, 160)";
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this.roundRect(ctx, uBoxX, uBoxY, uBoxSize, uBoxSize, 6);
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// Buchstabe „U“ mittig & weiß
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ctx.fillStyle = "white";
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ctx.font = "bold 38px DejaVuSans";
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ctx.textAlign = "center";
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ctx.textBaseline = "middle";
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ctx.fillText("U", uBoxX + uBoxSize / 2, uBoxY + uBoxSize / 2 + 2);
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// Stationsname rechts neben dem Symbol
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ctx.textAlign = "left";
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ctx.textBaseline = "alphabetic";
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ctx.fillStyle = `rgb(${BG.r},${BG.g},${BG.b})`;
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ctx.font = "bold 28px DejaVuSans";
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ctx.fillText("Amrumer Straße", uBoxX + uBoxSize + 25, 50);
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// Uhrzeit
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const now = new Date().toTimeString().slice(0, 5);
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ctx.font = "bold 26px DejaVuSans";
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ctx.fillText(now, WIDTH - 90, 50);
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// --- Abfahrten ---
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const deps = [...this.departures_cache];
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const osloer = deps.filter(x => x.direction?.includes("Osloer")).slice(0, 2);
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const steglitz = deps.filter(x => x.direction?.includes("Steglitz") || x.direction?.includes("Rathaus")).slice(0, 2);
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// Verschiebung nach unten
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const offsetY = 120;
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// Abschnitt Osloer
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ctx.fillStyle = `rgb(${YELLOW.r},${YELLOW.g},${YELLOW.b})`;
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ctx.font = "bold 26px DejaVuSans";
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ctx.fillText("→ Osloer Straße", 15, offsetY);
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if (osloer.length) {
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const mins = this.mins(osloer[0].when);
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ctx.fillStyle = `rgb(${WHITE.r},${WHITE.g},${WHITE.b})`;
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this.roundRect(ctx, 15, offsetY + 10, 75, 45, 6);
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ctx.fillStyle = `rgb(${U9_ORANGE.r},${U9_ORANGE.g},${U9_ORANGE.b})`;
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this.roundRect(ctx, 18, offsetY + 13, 69, 39, 5);
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ctx.fillStyle = `rgb(${WHITE.r},${WHITE.g},${WHITE.b})`;
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ctx.font = "bold 32px DejaVuSans";
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ctx.fillText("U9", 25, offsetY + 45);
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ctx.fillStyle = `rgb(${YELLOW.r},${YELLOW.g},${YELLOW.b})`;
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ctx.font = "bold 52px DejaVuSans";
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ctx.fillText(mins, WIDTH - 145, offsetY + 45);
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ctx.fillStyle = `rgb(${WHITE.r},${WHITE.g},${WHITE.b})`;
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ctx.font = "bold 36px DejaVuSans";
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ctx.fillText("min", WIDTH - 85, offsetY + 45);
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}
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if (osloer.length >= 2) {
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const mins2 = this.mins(osloer[1].when);
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ctx.fillStyle = `rgb(${YELLOW.r},${YELLOW.g},${YELLOW.b})`;
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ctx.font = "bold 36px DejaVuSans";
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ctx.fillText(mins2, WIDTH - 125, offsetY + 80);
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ctx.fillStyle = `rgb(${GRAY.r},${GRAY.g},${GRAY.b})`;
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ctx.font = "bold 24px DejaVuSans";
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ctx.fillText("min", WIDTH - 85, offsetY + 80);
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}
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// Trennlinie
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ctx.strokeStyle = `rgb(${YELLOW.r},${YELLOW.g},${YELLOW.b})`;
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ctx.lineWidth = 2;
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ctx.beginPath();
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ctx.moveTo(10, offsetY + 100);
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ctx.lineTo(WIDTH - 10, offsetY + 100);
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ctx.stroke();
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// Abschnitt Steglitz
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ctx.fillStyle = `rgb(${YELLOW.r},${YELLOW.g},${YELLOW.b})`;
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ctx.font = "bold 26px DejaVuSans";
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ctx.fillText("→ Rathaus Steglitz", 15, offsetY + 130);
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if (steglitz.length) {
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const mins = this.mins(steglitz[0].when);
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ctx.fillStyle = `rgb(${WHITE.r},${WHITE.g},${WHITE.b})`;
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this.roundRect(ctx, 15, offsetY + 140, 75, 45, 6);
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ctx.fillStyle = `rgb(${U9_ORANGE.r},${U9_ORANGE.g},${U9_ORANGE.b})`;
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this.roundRect(ctx, 18, offsetY + 143, 69, 39, 5);
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ctx.fillStyle = `rgb(${WHITE.r},${WHITE.g},${WHITE.b})`;
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ctx.font = "bold 32px DejaVuSans";
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ctx.fillText("U9", 25, offsetY + 175);
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ctx.fillStyle = `rgb(${YELLOW.r},${YELLOW.g},${YELLOW.b})`;
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ctx.font = "bold 52px DejaVuSans";
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ctx.fillText(mins, WIDTH - 145, offsetY + 175);
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ctx.fillStyle = `rgb(${WHITE.r},${WHITE.g},${WHITE.b})`;
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ctx.font = "bold 36px DejaVuSans";
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ctx.fillText("min", WIDTH - 85, offsetY + 175);
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}
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if (steglitz.length >= 2) {
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const mins2 = this.mins(steglitz[1].when);
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ctx.fillStyle = `rgb(${YELLOW.r},${YELLOW.g},${YELLOW.b})`;
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ctx.font = "bold 36px DejaVuSans";
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ctx.fillText(mins2, WIDTH - 125, offsetY + 210);
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ctx.fillStyle = `rgb(${GRAY.r},${GRAY.g},${GRAY.b})`;
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ctx.font = "bold 24px DejaVuSans";
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ctx.fillText("min", WIDTH - 85, offsetY + 210);
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}
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this.write(canvas);
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}
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write(canvas) {
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if (!this.fb) return;
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const ctx = canvas.getContext("2d");
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const img = ctx.getImageData(0, 0, WIDTH, HEIGHT);
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const buffer = Buffer.alloc(WIDTH * HEIGHT * 4);
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for (let i = 0; i < WIDTH * HEIGHT; i++) {
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const s = i * 4;
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buffer[s] = img.data[s + 2]; // BGRA
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buffer[s + 1] = img.data[s + 1];
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buffer[s + 2] = img.data[s];
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buffer[s + 3] = img.data[s + 3];
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}
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fs.writeSync(this.fb, buffer, 0, buffer.length, 0);
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}
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run() {
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const loop = () => {
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if (!this.running) return;
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this.draw();
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setTimeout(loop, 1000);
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};
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loop();
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}
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}
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// Main
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if (require.main === module) {
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const disp = new Display();
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disp.run();
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}
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