feat(nestjs): migrate to NestJS

packages/server/src/modules/Tenancy/TenancyDB/TenancyDB.module.ts

@@ -0,0 +1,56 @@
+import knex from 'knex';
+import * as LRUCache from 'lru-cache';
+import { Global, Module } from '@nestjs/common';
+import { knexSnakeCaseMappers } from 'objection';
+import { ClsModule, ClsService } from 'nestjs-cls';
+import { ConfigService } from '@nestjs/config';
+import { TENANCY_DB_CONNECTION } from './TenancyDB.constants';
+import { UnitOfWork } from './UnitOfWork.service';
+
+const lruCache = new LRUCache();
+
+export const TenancyDatabaseProxyProvider = ClsModule.forFeatureAsync({
+  provide: TENANCY_DB_CONNECTION,
+  global: true,
+  strict: true,
+  inject: [ConfigService, ClsService],
+  useFactory: async (configService: ConfigService, cls: ClsService) => () => {
+    const organizationId = cls.get('organizationId');
+    const database = `bigcapital_tenant_${organizationId}`;
+    const cachedInstance = lruCache.get(database);
+
+    if (cachedInstance) {
+      return cachedInstance;
+    }
+    const knexInstance = knex({
+      client: configService.get('tenantDatabase.client'),
+      connection: {
+        host: configService.get('tenantDatabase.host'),
+        user: configService.get('tenantDatabase.user'),
+        password: configService.get('tenantDatabase.password'),
+        database,
+        charset: 'utf8',
+      },
+      migrations: {
+        directory: configService.get('tenantDatabase.migrationsDir'),
+      },
+      seeds: {
+        directory: configService.get('tenantDatabase.seedsDir'),
+      },
+      pool: { min: 0, max: 7 },
+      ...knexSnakeCaseMappers({ upperCase: true }),
+    });
+    lruCache.set(database, knexInstance);
+
+    return knexInstance;
+  },
+  type: 'function',
+});
+
+@Global()
+@Module({
+  imports: [TenancyDatabaseProxyProvider],
+  providers: [UnitOfWork],
+  exports: [UnitOfWork],
+})
+export class TenancyDatabaseModule {}