Refacor electron app and add migrations

electron/cqrs/commands/handlers/saveAttachment.ts

@@ -0,0 +1,21 @@
+import { DataSource } from 'typeorm';
+import { AttachmentEntity } from '../../../entities';
+import { SaveAttachmentCommand } from '../../types';
+
+export async function handleSaveAttachment(command: SaveAttachmentCommand, dataSource: DataSource): Promise<void> {
+  const repo = dataSource.getRepository(AttachmentEntity);
+  const { attachment } = command.payload;
+  const entity = repo.create({
+    id: attachment.id,
+    messageId: attachment.messageId,
+    filename: attachment.filename,
+    size: attachment.size,
+    mime: attachment.mime,
+    isImage: attachment.isImage ? 1 : 0,
+    uploaderPeerId: attachment.uploaderPeerId ?? null,
+    filePath: attachment.filePath ?? null,
+    savedPath: attachment.savedPath ?? null
+  });
+
+  await repo.save(entity);
+}