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const express = require('express');
const path = require('path');
const fs = require('fs');
const app = express();
const port = 4000;
// Ordner-Struktur
const logsDir = path.join(__dirname, 'logs');
const certificatesDir = path.join(__dirname, 'resources/docs/certificates');
const galleryDir = path.join(__dirname, 'resources/images/gallery');
// Statische Dateien bereitstellen
app.use('/db', express.static(path.join(__dirname, 'database')));
app.use('/styles', express.static(path.join(__dirname, 'resources/stylesheets')));
app.use('/scripts', express.static(path.join(__dirname, 'resources/scripts')));
app.use('/content', express.static(path.join(__dirname, 'resources/content')));
app.use('/docs', express.static(path.join(__dirname, 'resources/docs')));
app.use('/images', express.static(path.join(__dirname, 'resources/images')));
// Helper-Funktion: Deutscher Zeitstempel
function getGermanTimestamp(){return new Date().toLocaleString("de-DE",{timeZone:"Europe/Berlin",year:"numeric",month:"2-digit",day:"2-digit",hour:"2-digit",minute:"2-digit",second:"2-digit"}).replace(",","")}
// Statistik aktualisieren
function updateStatistics(e,t,r,i,s){let l=s.getFullYear(),a=path.join(logsDir,`statistics-${l}.log`),n={total:0,referrers:{},devices:{},browsers:{},daily:{},monthly:{}};if(fs.existsSync(a))try{n=JSON.parse(fs.readFileSync(a,"utf8"))}catch(o){console.error("Fehler beim Parsen der Statistikdatei:",o)}let c=s.toISOString().split("T")[0],y=s.toISOString().substring(0,7);n.total++,n.referrers[e]=(n.referrers[e]||0)+1,n.devices[r]=(n.devices[r]||0)+1,n.browsers[i]=(n.browsers[i]||0)+1,n.daily[c]=(n.daily[c]||0)+1,n.monthly[y]=(n.monthly[y]||0)+1,fs.writeFileSync(a,JSON.stringify(n,null,2))}
// Alte Logs aufräumen (älter als 6 Monate)
function cleanupOldLogs(){let e=new Date;fs.readdir(logsDir,(n,r)=>{if(n)return console.error("Fehler beim Lesen des Logs-Verzeichnisses:",n);r.forEach(n=>{if(/^user-access-\d{2}-\d{4}\.log$/.test(n)){let[r,t]=n.match(/\d+/g).map(Number),l=new Date(t,r-1),s=(e.getFullYear()-l.getFullYear())*12+e.getMonth()-l.getMonth();s>6&&fs.unlink(path.join(logsDir,n),()=>{})}})})}
// Dashboard anzeigen
app.get("/dashboard", (req, res) => {
const filePath = path.join(logsDir, `statistics-${new Date().getFullYear()}.log`);
if (!fs.existsSync(filePath)) return res.send("<h1 style='color: #eee; background: #121212; padding: 2rem;'>Keine Statistiken gefunden.</h1>");
const stats = JSON.parse(fs.readFileSync(filePath, 'utf8'));
const mostUsed = (obj) =>
Object.entries(obj).reduce((a, b) => (a[1] > b[1] ? a : b), ["-", 0])[0];
const dailyLabels = Object.keys(stats.daily).map(date => `'${date}'`).join(",");
const dailyData = Object.values(stats.daily).join(",");
const monthlyLabels = Object.keys(stats.monthly).map(month => `'${month}'`).join(",");
const monthlyData = Object.values(stats.monthly).join(",");
const referrerTable = Object.entries(stats.referrers)
.sort((a, b) => b[1] - a[1])
.map(([ref, count]) => `<tr><td>${ref}</td><td>${count}</td></tr>`)
.join("");
const html = `
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
<title>Andreas Reimann | Statistik</title>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<style>
body {
margin: 0;
padding: 2rem;
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #121212;
color: #e0e0e0;
}
h1 {
font-size: 2rem;
margin-bottom: 1rem;
color: #ffffff;
}
.stat-container {
background: #1e1e1e;
padding: 1.5rem;
border-radius: 12px;
max-width: 1000px;
margin: auto;
box-shadow: 0 0 10px rgba(255, 255, 255, 0.05);
}
.stat {
margin: 1rem 0;
font-size: 1.1rem;
padding: 0.75rem 1rem;
border-radius: 8px;
background-color: #2a2a2a;
display: flex;
justify-content: space-between;
align-items: center;
}
.stat-label {
font-weight: 600;
color: #bbbbbb;
}
.stat-value {
color: #ffffff;
}
.chart-box {
margin-top: 2rem;
}
table {
width: 100%;
margin-top: 2rem;
border-collapse: collapse;
background-color: #1e1e1e;
color: #e0e0e0;
}
table th, table td {
padding: 0.75rem;
border-bottom: 1px solid #333;
text-align: left;
}
table th {
background-color: #2a2a2a;
}
footer {
margin-top: 3rem;
text-align: center;
color: #666;
font-size: 0.9rem;
}
</style>
</head>
<body>
<div class="stat-container">
<h1>📊 Website Statistik</h1>
<div class="stat">
<span class="stat-label">Total User Access:</span>
<span class="stat-value">${stats.total}</span>
</div>
<div class="stat">
<span class="stat-label">Most Used Referrer:</span>
<span class="stat-value">${mostUsed(stats.referrers)}</span>
</div>
<div class="stat">
<span class="stat-label">Most Used Device:</span>
<span class="stat-value">${mostUsed(stats.devices)}</span>
</div>
<div class="stat">
<span class="stat-label">Most Used Browser:</span>
<span class="stat-value">${mostUsed(stats.browsers)}</span>
</div>
<div class="stat">
<span class="stat-label">Average Daily Access:</span>
<span class="stat-value">${(stats.total / Object.keys(stats.daily).length).toFixed(2)}</span>
</div>
<div class="stat">
<span class="stat-label">Average Monthly Access:</span>
<span class="stat-value">${(stats.total / Object.keys(stats.monthly).length).toFixed(2)}</span>
</div>
<div class="chart-box">
<canvas id="dailyChart" height="100"></canvas>
</div>
<div class="chart-box">
<canvas id="monthlyChart" height="100"></canvas>
</div>
<h2>Live Referrer-Tabelle</h2>
<table>
<thead>
<tr><th>Referrer</th><th>Anzahl</th></tr>
</thead>
<tbody>
${referrerTable}
</tbody>
</table>
</div>
<footer>© 2025 Andreas Reimann</footer>
<script>
const dailyCtx = document.getElementById('dailyChart').getContext('2d');
const monthlyCtx = document.getElementById('monthlyChart').getContext('2d');
new Chart(dailyCtx, {
type: 'line',
data: {
labels: [${dailyLabels}],
datasets: [{
label: 'Tägliche Zugriffe',
data: [${dailyData}],
borderColor: '#4fc3f7',
backgroundColor: 'rgba(79, 195, 247, 0.1)',
fill: true
}]
},
options: { responsive: true, plugins: { legend: { labels: { color: '#e0e0e0' } } }, scales: { x: { ticks: { color: '#aaa' } }, y: { ticks: { color: '#aaa' } } } }
});
new Chart(monthlyCtx, {
type: 'bar',
data: {
labels: [${monthlyLabels}],
datasets: [{
label: 'Monatliche Zugriffe',
data: [${monthlyData}],
backgroundColor: '#81c784'
}]
},
options: { responsive: true, plugins: { legend: { labels: { color: '#e0e0e0' } } }, scales: { x: { ticks: { color: '#aaa' } }, y: { ticks: { color: '#aaa' } } } }
});
</script>
</body>
</html>
`;
res.send(html);
});
// API: Bildergalerie
app.get("/get-images",(e,s)=>{fs.readdir(galleryDir,(e,i)=>{if(e)return s.status(500).send("Fehler beim Lesen des Verzeichnisses");let t=i.filter(e=>/\.(jpg|jpeg|png|gif|webp)$/i.test(e));s.json(t)})});
// API: Zertifikate
app.get("/get-certificates",(e,t)=>{fs.readdir(certificatesDir,(e,r)=>{if(e)return t.status(500).send("Serverfehler");let i=r.filter(e=>/\.(jpg|jpeg|png|webp)$/i.test(e));t.json(i)})});
// Logging & Interface-Ausgabe
app.get("*",(e,r)=>{fs.existsSync(logsDir)||fs.mkdirSync(logsDir);let t=new Date,n=path.join(logsDir,`user-access-${String(t.getMonth()+1).padStart(2,"0")}-${t.getFullYear()}.log`);e.headers["x-forwarded-for"]||e.socket.remoteAddress;let s=e.get("Referer")||"Direct Access",i=e.get("User-Agent")||"Unknown",o=/mobile/i.test(i)?"Mobile":"Desktop",a=i.match(/(Firefox|Chrome|Safari|Opera|Edg|Brave)/i),c=a?a[0]:"Unknown",d=`[\${getGermanTimestamp()}] \${ip} accessed website
Referrer: \${referrer}
User-Agent: \${userAgent}
`;fs.appendFile(n,d,e=>{e&&console.error("Fehler beim Schreiben des Logs:",e)}),updateStatistics(s,i,o,c,t),cleanupOldLogs(),r.sendFile(path.join(__dirname,"interface.html"))});
// Cache-Header deaktivieren
app.use((e,a,o)=>{a.setHeader("Cache-Control","no-store, no-cache, must-revalidate, proxy-revalidate"),o()});
app.listen(port,()=>{console.log(`Online on http://localhost:${port}`)});