feat: implement invoice processing and discount management

src/modules/invoices/queue/invoice.processor.ts

@@ -8,6 +8,9 @@ import { WorkerProcessor } from "../../../common/queues/worker.processor";
 import { LoggerService } from "../../logger/logger.service";
 import { NotificationQueue } from "../../notifications/queue/notification.queue";
 import { SubscriptionStatus } from "../../subscriptions/enums/subscription-status.enum";
+import { SupportPlan } from "../../support-plans/entities/support-plan.entity";
+import { UserSupportPlan } from "../../support-plans/entities/user-support-plan.entity";
+import { UserSupportPlanStatus } from "../../support-plans/enums/user-support-plan-status.enum";
 import { User } from "../../users/entities/user.entity";
 import { RoleEnum } from "../../users/enums/role.enum";
 import { INVOICE } from "../constants";
@@ -210,6 +213,16 @@ export class InvoiceProcessor extends WorkerProcessor {
         invoiceId: invoice.numericId.toString(),
       });
     }
+    if (invoice.items[0]?.supportPlan) {
+      this.logger.log(
+        `Invoice ${invoice.id} has been cancelled as it is more than 10 days overdue. Support Plan ${invoice.items[0].supportPlan.id} has been cancelled.`,
+      );
+      const userSupportPlan = invoice.items[0].supportPlan;
+      userSupportPlan.status = UserSupportPlanStatus.INACTIVE;
+      await queryRunner.manager.save(UserSupportPlan, userSupportPlan);
+
+      await this.applyFreeSupportPlan(invoice, queryRunner);
+    }
     this.logger.log(`Invoice ${invoice.id} has been cancelled as it is more than 10 days overdue.`);
   }
   //********************************** */
@@ -348,4 +361,39 @@ export class InvoiceProcessor extends WorkerProcessor {
       await queryRunner.release();
     }
   }
+
+  //********************************** */
+  private async applyFreeSupportPlan(invoice: Invoice, queryRunner: QueryRunner) {
+    const freeSupportPlan = await queryRunner.manager.findOne(SupportPlan, {
+      where: { isFree: true },
+    });
+
+    if (!freeSupportPlan) throw new Error(`No free support plan found`);
+
+    const startDate = dayjs().toDate();
+    const endDate = dayjs().add(freeSupportPlan.duration, "day").toDate();
+
+    const userSupportPlan = queryRunner.manager.create(UserSupportPlan, {
+      user: invoice.user,
+      supportPlan: freeSupportPlan,
+      startDate,
+      endDate,
+    });
+
+    await queryRunner.manager.save(UserSupportPlan, userSupportPlan);
+
+    const invoiceDueDate = dayjs(userSupportPlan.startDate).add(INVOICE.DUEDATE, "day").toDate();
+
+    const newInvoice = await this.invoicesService.createInvoiceForSupportPlan(
+      invoice.user,
+      freeSupportPlan,
+      userSupportPlan,
+      invoiceDueDate,
+      queryRunner,
+    );
+
+    userSupportPlan.status = UserSupportPlanStatus.ACTIVE;
+    await queryRunner.manager.save(UserSupportPlan, userSupportPlan);
+    await this.invoicesService.payInvoice(newInvoice.id, invoice.user.id, queryRunner);
+  }
 }