refactor(server): config system (#11081)

packages/backend/server/src/models/config.ts

@@ -0,0 +1,24 @@
+import { Injectable } from '@nestjs/common';
+import { Transactional } from '@nestjs-cls/transactional';
+
+import { BaseModel } from './base';
+
+@Injectable()
+export class AppConfigModel extends BaseModel {
+  async load() {
+    return this.db.appConfig.findMany();
+  }
+
+  @Transactional()
+  async save(user: string, updates: Array<{ key: string; value: any }>) {
+    return await Promise.allSettled(
+      updates.map(async update => {
+        return this.db.appConfig.upsert({
+          where: { id: update.key },
+          update: { value: update.value, lastUpdatedBy: user },
+          create: { id: update.key, value: update.value, lastUpdatedBy: user },
+        });
+      })
+    );
+  }
+}