feat: wip server folder structure (#4573)

* feat: wip server folder structure

* fix: merge

* fix: wrong merge

* fix: remove unused file

* fix: comment

* fix: lint

* fix: merge

* fix: remove console.log

* fix: metadata graphql arguments broken

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

@@ -0,0 +1,61 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+
+import { FindManyOptions, 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,
+  ): Promise<DataSourceEntity> {
+    // 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 getManyDataSourceMetadata(
+    options: FindManyOptions<DataSourceEntity> = {},
+  ): Promise<DataSourceEntity[]> {
+    return this.dataSourceMetadataRepository.find(options);
+  }
+
+  async getDataSourcesMetadataFromWorkspaceId(
+    workspaceId: string,
+  ): Promise<DataSourceEntity[]> {
+    return this.dataSourceMetadataRepository.find({
+      where: { workspaceId },
+      order: { createdAt: 'DESC' },
+    });
+  }
+
+  async getLastDataSourceMetadataFromWorkspaceIdOrFail(
+    workspaceId: string,
+  ): Promise<DataSourceEntity> {
+    return this.dataSourceMetadataRepository.findOneOrFail({
+      where: { workspaceId },
+      order: { createdAt: 'DESC' },
+    });
+  }
+
+  async delete(workspaceId: string): Promise<void> {
+    await this.dataSourceMetadataRepository.delete({ workspaceId });
+  }
+}