second to last commit hopefully final features and Ui refinements

scripts/migrate-geohash-precision.js

@@ -0,0 +1,85 @@
+// scripts/migrate-geohash-precision.js
+//
+// One-time migration: re-encodes every existing message's `geohash` field at
+// precision 9 (previously 6), matching the precision addMessage() now writes
+// for new messages (see src/lib/firebase/messages.js). lat/lng/text/etc are
+// read from each doc but never written back - updateDoc() below is only ever
+// called with { geohash: newGeohash }, so this cannot touch any other field.
+//
+// Firestore's security rules normally only allow `echoCount`/`lastEchoAt` to
+// change via update() (see firestore.rules). Before running this script,
+// temporarily add 'geohash' to that allowlist and deploy:
+//
+//   firebase deploy --only firestore:rules
+//
+// Then run this script:
+//
+//   node scripts/migrate-geohash-precision.js
+//
+// Then revert firestore.rules back to its original allowlist and redeploy.
+
+import { initializeApp } from 'firebase/app';
+import { getFirestore, collection, getDocs, doc, updateDoc } from 'firebase/firestore';
+import ngeohash from 'ngeohash';
+import { readFileSync } from 'fs';
+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+
+// --- load PUBLIC_FIREBASE_* values from .env (same file SvelteKit reads via
+// $env/static/public, which only works inside SvelteKit - this script is a
+// plain Node script, so .env is parsed by hand here instead) --------------
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const envPath = join(__dirname, '..', '.env');
+const env = {};
+for (const line of readFileSync(envPath, 'utf-8').split('\n')) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith('#')) continue;
+    const eq = trimmed.indexOf('=');
+    if (eq === -1) continue;
+    env[trimmed.slice(0, eq).trim()] = trimmed.slice(eq + 1).trim();
+}
+
+const firebaseConfig = {
+    apiKey: env.PUBLIC_FIREBASE_API_KEY,
+    authDomain: env.PUBLIC_FIREBASE_AUTH_DOMAIN,
+    projectId: env.PUBLIC_FIREBASE_PROJECT_ID,
+    storageBucket: env.PUBLIC_FIREBASE_STORAGE_BUCKET,
+    messagingSenderId: env.PUBLIC_FIREBASE_MESSAGING_SENDER_ID,
+    appId: env.PUBLIC_FIREBASE_APP_ID
+};
+
+const NEW_PRECISION = 9; // matches addMessage() in src/lib/firebase/messages.js
+
+const app = initializeApp(firebaseConfig);
+const db = getFirestore(app);
+
+const snapshot = await getDocs(collection(db, 'messages'));
+console.log(`found ${snapshot.docs.length} message(s)`);
+
+let updated = 0;
+let skipped = 0;
+
+for (const docSnap of snapshot.docs) {
+    const data = docSnap.data();
+
+    if (typeof data.lat !== 'number' || typeof data.lng !== 'number') {
+        console.warn(`skipping ${docSnap.id}: missing lat/lng`);
+        skipped++;
+        continue;
+    }
+
+    const newGeohash = ngeohash.encode(data.lat, data.lng, NEW_PRECISION);
+
+    if (data.geohash === newGeohash) {
+        skipped++;
+        continue;
+    }
+
+    // ONLY the geohash field is written - everything else on the doc is
+    // left exactly as it was.
+    await updateDoc(doc(db, 'messages', docSnap.id), { geohash: newGeohash });
+    console.log(`${docSnap.id}: ${data.geohash} -> ${newGeohash}`);
+    updated++;
+}
+
+console.log(`done. updated ${updated}, skipped ${skipped}`);