34 lines
1 KiB
JavaScript
34 lines
1 KiB
JavaScript
const path = require('path');
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const fs = require('fs');
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const { db, DATA_DIR } = require('./db');
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const BACKUP_DIR = path.join(DATA_DIR, 'backups');
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const KEEP = 14;
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async function runBackup(now) {
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fs.mkdirSync(BACKUP_DIR, { recursive: true });
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const stamp = now.replace(/[:.]/g, '-');
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const dest = path.join(BACKUP_DIR, `dienstplan-${stamp}.db`);
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await db.backup(dest); // Online-Backup-API von SQLite — konsistent, ohne cp-Risiko
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prune();
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return dest;
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}
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function prune() {
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const files = fs.readdirSync(BACKUP_DIR)
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.filter(f => f.startsWith('dienstplan-') && f.endsWith('.db'))
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.sort(); // ISO-abgeleiteter Stamp → lexikografisch == chronologisch
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const excess = files.length - KEEP;
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for (let i = 0; i < excess; i++) {
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fs.unlinkSync(path.join(BACKUP_DIR, files[i]));
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}
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}
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function scheduleBackups() {
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const tick = () => runBackup(new Date().toISOString())
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.catch(e => console.error('Backup fehlgeschlagen:', e));
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tick();
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setInterval(tick, 24 * 60 * 60 * 1000);
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}
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module.exports = { runBackup, scheduleBackups, BACKUP_DIR };
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