Refacor electron app and add migrations

electron/db/database.ts

@@ -0,0 +1,76 @@
+import { app } from 'electron';
+import * as fs from 'fs';
+import * as fsp from 'fs/promises';
+import * as path from 'path';
+import { DataSource } from 'typeorm';
+import {
+  MessageEntity,
+  UserEntity,
+  RoomEntity,
+  ReactionEntity,
+  BanEntity,
+  AttachmentEntity,
+  MetaEntity
+} from '../entities';
+import { settings } from '../settings';
+
+let applicationDataSource: DataSource | undefined;
+
+export function getDataSource(): DataSource | undefined {
+  return applicationDataSource;
+}
+
+export async function initializeDatabase(): Promise<void> {
+  const userDataPath = app.getPath('userData');
+  const dbDir = path.join(userDataPath, 'metoyou');
+
+  await fsp.mkdir(dbDir, { recursive: true });
+  const databaseFilePath = path.join(dbDir, settings.databaseName);
+
+  let database: Uint8Array | undefined;
+
+  if (fs.existsSync(databaseFilePath)) {
+    database = fs.readFileSync(databaseFilePath);
+  }
+
+  applicationDataSource = new DataSource({
+    type: 'sqljs',
+    database,
+    entities: [MessageEntity, UserEntity, RoomEntity, ReactionEntity, BanEntity, AttachmentEntity, MetaEntity],
+    migrations: [
+      path.join(__dirname, '..', 'migrations', '*.js'),
+      path.join(__dirname, '..', 'migrations', '*.ts')
+    ],
+    synchronize: false,
+    logging: false,
+    autoSave: true,
+    location: databaseFilePath
+  });
+
+  try {
+    await applicationDataSource.initialize();
+    console.log('[DB] Connection initialised at:', databaseFilePath);
+
+    try {
+      await applicationDataSource.runMigrations();
+      console.log('[DB] Migrations executed');
+    } catch (migErr) {
+      console.error('[DB] Migration error:', migErr);
+    }
+  } catch (error) {
+    console.error('[DB] Initialisation error:', error);
+  }
+}
+
+export async function destroyDatabase(): Promise<void> {
+  if (applicationDataSource?.isInitialized) {
+    try {
+      await applicationDataSource.destroy();
+      console.log('[DB] Connection closed');
+    } catch (error) {
+      console.error('[DB] Error closing connection:', error);
+    } finally {
+      applicationDataSource = undefined;
+    }
+  }
+}