Use FTS5 optimizer in production

ts/sql/migrations/index.ts

@@ -6,6 +6,7 @@ import { keyBy } from 'lodash';
 import { v4 as generateUuid } from 'uuid';
 
 import type { LoggerType } from '../../types/Logging';
+import { isProduction } from '../../util/version';
 import {
   getSchemaVersion,
   getUserVersion,
@@ -2019,7 +2020,53 @@ export class DBVersionFromFutureError extends Error {
   override name = 'DBVersionFromFutureError';
 }
 
-export function updateSchema(db: Database, logger: LoggerType): void {
+export function lazyFTS5SecureDelete(
+  db: Database,
+  logger: LoggerType,
+  enabled: boolean
+): void {
+  const isEnabled =
+    db
+      .prepare(
+        `
+          SELECT v FROM messages_fts_config WHERE k is 'secure-delete';
+        `
+      )
+      .pluck()
+      .get() === 1;
+
+  if (isEnabled && !enabled) {
+    logger.info('lazyFTS5SecureDelete: disabling, rebuilding fts5 index');
+    db.exec(`
+      -- Disable secure-delete
+      INSERT INTO messages_fts
+      (messages_fts, rank)
+      VALUES
+      ('secure-delete', 0);
+
+      --- Rebuild the index to fix the corruption
+      INSERT INTO messages_fts
+      (messages_fts)
+      VALUES
+      ('rebuild');
+    `);
+  } else if (!isEnabled && enabled) {
+    logger.info('lazyFTS5SecureDelete: enabling');
+    db.exec(`
+      -- Enable secure-delete
+      INSERT INTO messages_fts
+      (messages_fts, rank)
+      VALUES
+      ('secure-delete', 1);
+    `);
+  }
+}
+
+export function updateSchema(
+  db: Database,
+  logger: LoggerType,
+  appVersion: string
+): void {
   const sqliteVersion = getSQLiteVersion(db);
   const sqlcipherVersion = getSQLCipherVersion(db);
   const startingVersion = getUserVersion(db);
@@ -2047,6 +2094,8 @@ export function updateSchema(db: Database, logger: LoggerType): void {
     runSchemaUpdate(startingVersion, db, logger);
   }
 
+  lazyFTS5SecureDelete(db, logger, !isProduction(appVersion));
+
   if (startingVersion !== MAX_VERSION) {
     const start = Date.now();
     db.pragma('optimize');