Migrate to a monorepo structure (#2909)

packages/twenty-server/src/metadata/data-source/data-source.service.ts

@@ -0,0 +1,48 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+
+import { Repository } from 'typeorm';
+
+import { DataSourceEntity } from './data-source.entity';
+
+@Injectable()
+export class DataSourceService {
+  constructor(
+    @InjectRepository(DataSourceEntity, 'metadata')
+    private readonly dataSourceMetadataRepository: Repository<DataSourceEntity>,
+  ) {}
+
+  async createDataSourceMetadata(workspaceId: string, workspaceSchema: string) {
+    // TODO: Double check if this is the correct way to do this
+    const dataSource = await this.dataSourceMetadataRepository.findOne({
+      where: { workspaceId },
+    });
+
+    if (dataSource) {
+      return dataSource;
+    }
+
+    return this.dataSourceMetadataRepository.save({
+      workspaceId,
+      schema: workspaceSchema,
+    });
+  }
+
+  async getDataSourcesMetadataFromWorkspaceId(workspaceId: string) {
+    return this.dataSourceMetadataRepository.find({
+      where: { workspaceId },
+      order: { createdAt: 'DESC' },
+    });
+  }
+
+  async getLastDataSourceMetadataFromWorkspaceIdOrFail(workspaceId: string) {
+    return this.dataSourceMetadataRepository.findOneOrFail({
+      where: { workspaceId },
+      order: { createdAt: 'DESC' },
+    });
+  }
+
+  async delete(workspaceId: string) {
+    await this.dataSourceMetadataRepository.delete({ workspaceId });
+  }
+}