[db][usage] Add d_b_billed_session table migration and Go definitions

Co-authored-by: Laurie T. Malau <[email protected]>

Author: jankeromnes

components/gitpod-db/src/typeorm/migration/1659601647550-BilledSession.ts

@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) 2022 Gitpod GmbH. All rights reserved.
+ * Licensed under the GNU Affero General Public License (AGPL).
+ * See License-AGPL.txt in the project root for license information.
+ */
+
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+export class BilledSession1659601647550 implements MigrationInterface {
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(
+            "CREATE TABLE IF NOT EXISTS `d_b_billed_session` (`instanceId` char(36) NOT NULL, `from` varchar(255) NOT NULL, `to` varchar(255) NOT NULL DEFAULT '', `system` varchar(255) NOT NULL, `invoiceId` varchar(255) NOT NULL DEFAULT '', `deleted` tinyint(4) NOT NULL DEFAULT '0', `_lastModified` timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6) ON UPDATE CURRENT_TIMESTAMP(6), PRIMARY KEY (`instanceId`, `from`), KEY `ind_dbsync` (`_lastModified`)) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;",
+        );
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {}
+}

components/usage/pkg/db/billed_session.go

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+// Copyright (c) 2022 Gitpod GmbH. All rights reserved.
+// Licensed under the GNU Affero General Public License (AGPL).
+// See License-AGPL.txt in the project root for license information.
+
+package db
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+)
+
+// BilledSession represents the underlying DB object
+type BilledSession struct {
+	InstanceID   uuid.UUID   `gorm:"primary_key;column:instanceId;type:char;size:36;" json:"instanceId"`
+	From         VarcharTime `gorm:"primary_key;column:from;type:varchar;size:255;" json:"from"`
+	To           VarcharTime `gorm:"column:to;type:varchar;size:255;" json:"to"`
+	System       string      `gorm:"column:sytem;type:varchar;size:255;" json:"system"`
+	InvoiceID    string      `gorm:"column:invoiceId;type:varchar;size:255;" json:"invoiceId"`
+	LastModified time.Time   `gorm:"column:_lastModified;type:timestamp;default:CURRENT_TIMESTAMP(6);" json:"_lastModified"`
+
+	// deleted is restricted for use by db-sync
+	_ bool `gorm:"column:deleted;type:tinyint;default:0;" json:"deleted"`
+}