Graceful handling of readonly DB error

ts/sql/errors.ts

@@ -1,11 +1,32 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
-export function isCorruptionError(error?: Error): boolean {
-  return (
-    error?.message?.includes('SQLITE_CORRUPT') ||
-    error?.message?.includes('database disk image is malformed') ||
-    error?.message?.includes('file is not a database') ||
-    false
-  );
+export enum SqliteErrorKind {
+  Corrupted,
+  Readonly,
+  Unknown,
+}
+
+export function parseSqliteError(error?: Error): SqliteErrorKind {
+  const message = error?.message;
+  if (!message) {
+    return SqliteErrorKind.Unknown;
+  }
+
+  if (
+    message.includes('SQLITE_CORRUPT') ||
+    message.includes('database disk image is malformed') ||
+    message.includes('file is not a database')
+  ) {
+    return SqliteErrorKind.Corrupted;
+  }
+
+  if (
+    message.includes('SQLITE_READONLY') ||
+    message.includes('attempt to write a readonly database')
+  ) {
+    return SqliteErrorKind.Readonly;
+  }
+
+  return SqliteErrorKind.Unknown;
 }