86 lines
3.1 KiB
JavaScript
86 lines
3.1 KiB
JavaScript
// scripts/migrate-geohash-precision.js
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//
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// One-time migration: re-encodes every existing message's `geohash` field at
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// precision 9 (previously 6), matching the precision addMessage() now writes
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// for new messages (see src/lib/firebase/messages.js). lat/lng/text/etc are
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// read from each doc but never written back - updateDoc() below is only ever
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// called with { geohash: newGeohash }, so this cannot touch any other field.
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//
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// Firestore's security rules normally only allow `echoCount`/`lastEchoAt` to
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// change via update() (see firestore.rules). Before running this script,
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// temporarily add 'geohash' to that allowlist and deploy:
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//
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// firebase deploy --only firestore:rules
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//
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// Then run this script:
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//
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// node scripts/migrate-geohash-precision.js
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//
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// Then revert firestore.rules back to its original allowlist and redeploy.
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import { initializeApp } from 'firebase/app';
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import { getFirestore, collection, getDocs, doc, updateDoc } from 'firebase/firestore';
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import ngeohash from 'ngeohash';
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import { readFileSync } from 'fs';
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import { fileURLToPath } from 'url';
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import { dirname, join } from 'path';
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// --- load PUBLIC_FIREBASE_* values from .env (same file SvelteKit reads via
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// $env/static/public, which only works inside SvelteKit - this script is a
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// plain Node script, so .env is parsed by hand here instead) --------------
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const __dirname = dirname(fileURLToPath(import.meta.url));
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const envPath = join(__dirname, '..', '.env');
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const env = {};
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for (const line of readFileSync(envPath, 'utf-8').split('\n')) {
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const trimmed = line.trim();
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if (!trimmed || trimmed.startsWith('#')) continue;
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const eq = trimmed.indexOf('=');
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if (eq === -1) continue;
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env[trimmed.slice(0, eq).trim()] = trimmed.slice(eq + 1).trim();
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}
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const firebaseConfig = {
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apiKey: env.PUBLIC_FIREBASE_API_KEY,
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authDomain: env.PUBLIC_FIREBASE_AUTH_DOMAIN,
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projectId: env.PUBLIC_FIREBASE_PROJECT_ID,
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storageBucket: env.PUBLIC_FIREBASE_STORAGE_BUCKET,
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messagingSenderId: env.PUBLIC_FIREBASE_MESSAGING_SENDER_ID,
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appId: env.PUBLIC_FIREBASE_APP_ID
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};
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const NEW_PRECISION = 9; // matches addMessage() in src/lib/firebase/messages.js
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const app = initializeApp(firebaseConfig);
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const db = getFirestore(app);
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const snapshot = await getDocs(collection(db, 'messages'));
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console.log(`found ${snapshot.docs.length} message(s)`);
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let updated = 0;
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let skipped = 0;
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for (const docSnap of snapshot.docs) {
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const data = docSnap.data();
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if (typeof data.lat !== 'number' || typeof data.lng !== 'number') {
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console.warn(`skipping ${docSnap.id}: missing lat/lng`);
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skipped++;
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continue;
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}
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const newGeohash = ngeohash.encode(data.lat, data.lng, NEW_PRECISION);
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if (data.geohash === newGeohash) {
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skipped++;
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continue;
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}
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// ONLY the geohash field is written - everything else on the doc is
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// left exactly as it was.
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await updateDoc(doc(db, 'messages', docSnap.id), { geohash: newGeohash });
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console.log(`${docSnap.id}: ${data.geohash} -> ${newGeohash}`);
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updated++;
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}
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console.log(`done. updated ${updated}, skipped ${skipped}`);
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