refactor(electron): sqlite db data workflow (remove symlink & fs watcher) (#2491)

apps/electron/layers/main/src/db/helper.ts

@@ -0,0 +1,38 @@
+import type { Database } from 'better-sqlite3';
+import sqlite from 'better-sqlite3';
+
+import { logger } from '../logger';
+
+export function isValidateDB(db: Database) {
+  // check if db has two tables, one for updates and one for blobs
+  const statement = db.prepare(
+    `SELECT name FROM sqlite_schema WHERE type='table'`
+  );
+  const rows = statement.all() as { name: string }[];
+  const tableNames = rows.map(row => row.name);
+  if (!tableNames.includes('updates') || !tableNames.includes('blobs')) {
+    return false;
+  }
+}
+
+export function isValidDBFile(path: string) {
+  let db: Database | null = null;
+  try {
+    db = sqlite(path);
+    // check if db has two tables, one for updates and one for blobs
+    const statement = db.prepare(
+      `SELECT name FROM sqlite_schema WHERE type='table'`
+    );
+    const rows = statement.all() as { name: string }[];
+    const tableNames = rows.map(row => row.name);
+    if (!tableNames.includes('updates') || !tableNames.includes('blobs')) {
+      return false;
+    }
+    return true;
+  } catch (error) {
+    logger.error('isValidDBFile', error);
+    return false;
+  } finally {
+    db?.close();
+  }
+}