feat(nestjs): migrate to NestJS

packages/server/src/modules/Tenancy/TenancyContext.service.ts

@@ -0,0 +1,54 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { ClsService } from 'nestjs-cls';
+import { SystemUser } from '../System/models/SystemUser';
+import { TenantModel } from '../System/models/TenantModel';
+
+@Injectable()
+export class TenancyContext {
+  constructor(
+    private readonly cls: ClsService,
+
+    @Inject(SystemUser.name)
+    private readonly systemUserModel: typeof SystemUser,
+
+    @Inject(TenantModel.name)
+    private readonly systemTenantModel: typeof TenantModel,
+  ) {}
+
+  /**
+   * Get the current tenant.
+   * @param {boolean} withMetadata - If true, the tenant metadata will be fetched.
+   * @returns
+   */
+  getTenant(withMetadata: boolean = false) {
+    // Get the tenant from the request headers.
+    const organizationId = this.cls.get('organizationId');
+
+    if (!organizationId) {
+      throw new Error('Tenant not found');
+    }
+    const query = this.systemTenantModel.query().findOne({ organizationId });
+
+    if (withMetadata) {
+      query.withGraphFetched('metadata');
+    }
+    return query;
+  }
+
+  async getTenantMetadata() {
+    const tenant = await this.getTenant(true);
+
+    return tenant?.metadata;
+  }
+
+  /**
+   * Retrieves the current system user.
+   * @returns {Promise<SystemUser>}
+   */
+  getSystemUser() {
+    // Get the user from the request headers.
+    const userId = this.cls.get('userId');
+
+    return this.systemUserModel.query().findOne({ id: userId });
+  }
+}