Add a dedicated GQL server for metadata available on /meta (#1820)

server/src/metadata/tenant-migration/tenant-migration.service.ts

@@ -0,0 +1,92 @@
+import { Injectable } from '@nestjs/common';
+
+import { IsNull } from 'typeorm';
+
+import { DataSourceService } from 'src/metadata/data-source/data-source.service';
+
+import {
+  TenantMigration,
+  TenantMigrationTableChange,
+} from './tenant-migration.entity';
+
+@Injectable()
+export class TenantMigrationService {
+  constructor(private readonly dataSourceService: DataSourceService) {}
+
+  /**
+   * Get all pending migrations for a given workspaceId
+   *
+   * @param workspaceId: string
+   * @returns Promise<TenantMigration[]>
+   */
+  public async getPendingMigrations(
+    workspaceId: string,
+  ): Promise<TenantMigration[]> {
+    const workspaceDataSource =
+      await this.dataSourceService.connectToWorkspaceDataSource(workspaceId);
+
+    if (!workspaceDataSource) {
+      throw new Error('Workspace data source not found');
+    }
+
+    const tenantMigrationRepository =
+      workspaceDataSource.getRepository(TenantMigration);
+
+    return tenantMigrationRepository.find({
+      order: { createdAt: 'ASC' },
+      where: { appliedAt: IsNull() },
+    });
+  }
+
+  /**
+   * Set appliedAt as current date for a given migration.
+   * Should be called once the migration has been applied
+   *
+   * @param workspaceId: string
+   * @param migration: TenantMigration
+   */
+  public async setAppliedAtForMigration(
+    workspaceId: string,
+    migration: TenantMigration,
+  ) {
+    const workspaceDataSource =
+      await this.dataSourceService.connectToWorkspaceDataSource(workspaceId);
+
+    if (!workspaceDataSource) {
+      throw new Error('Workspace data source not found');
+    }
+
+    const tenantMigrationRepository =
+      workspaceDataSource.getRepository(TenantMigration);
+
+    await tenantMigrationRepository.save({
+      id: migration.id,
+      appliedAt: new Date(),
+    });
+  }
+
+  /**
+   * Create a new pending migration for a given workspaceId and expected changes
+   *
+   * @param workspaceId
+   * @param migrations
+   */
+  public async createMigration(
+    workspaceId: string,
+    migrations: TenantMigrationTableChange[],
+  ) {
+    const workspaceDataSource =
+      await this.dataSourceService.connectToWorkspaceDataSource(workspaceId);
+
+    if (!workspaceDataSource) {
+      throw new Error('Workspace data source not found');
+    }
+
+    const tenantMigrationRepository =
+      workspaceDataSource.getRepository(TenantMigration);
+
+    await tenantMigrationRepository.save({
+      migrations,
+    });
+  }
+}