send messages when matcher ad is created, or when matcher ad creation has failed

src/app.constants.ts

@@ -14,13 +14,9 @@ export const AD_UPDATED_QUEUE = 'matcher-ad-updated';
 export const AD_DELETED_MESSAGE_HANDLER = 'adDeleted';
 export const AD_DELETED_ROUTING_KEY = 'ad.deleted';
 export const AD_DELETED_QUEUE = 'matcher-ad-deleted';
-
+export const MATCHER_AD_CREATED_ROUTING_KEY = 'matcher.ad.created';
-// configuration
+export const MATCHER_AD_CREATION_FAILED_ROUTING_KEY =
-export const SERVICE_CONFIGURATION_SET_QUEUE = 'matcher-configuration-set';
+  'matcher.ad.creation.failed';
-export const SERVICE_CONFIGURATION_DELETE_QUEUE =
-  'matcher-configuration-delete';
-export const SERVICE_CONFIGURATION_PROPAGATE_QUEUE =
-  'matcher-configuration-propagate';
 
 // health
 export const GRPC_HEALTH_PACKAGE_NAME = 'health';

src/modules/ad/ad.module.ts

@@ -43,6 +43,7 @@ import {
   RedisModuleOptions,
 } from '@songkeys/nestjs-redis';
 import { ConfigurationRepository } from '@mobicoop/configuration-module';
+import { PublishMessageWhenMatcherAdIsCreatedDomainEventHandler } from './core/application/event-handlers/publish-message-when-matcher-ad-is-created.domain-event-handler';
 
 const imports = [
   CqrsModule,
@@ -80,6 +81,10 @@ const grpcControllers = [MatchGrpcController];
 
 const messageHandlers = [AdCreatedMessageHandler];
 
+const eventHandlers: Provider[] = [
+  PublishMessageWhenMatcherAdIsCreatedDomainEventHandler,
+];
+
 const commandHandlers: Provider[] = [CreateAdService];
 
 const queryHandlers: Provider[] = [MatchQueryHandler];
@@ -150,6 +155,7 @@ const adapters: Provider[] = [
   controllers: [...grpcControllers],
   providers: [
     ...messageHandlers,
+    ...eventHandlers,
     ...commandHandlers,
     ...queryHandlers,
     ...mappers,

src/modules/ad/core/application/commands/create-ad/create-ad.service.ts

@@ -1,10 +1,18 @@
 import { CommandHandler, ICommandHandler } from '@nestjs/cqrs';
 import { CreateAdCommand } from './create-ad.command';
 import { Inject } from '@nestjs/common';
-import { AD_REPOSITORY, AD_ROUTE_PROVIDER } from '@modules/ad/ad.di-tokens';
+import {
+  AD_MESSAGE_PUBLISHER,
+  AD_REPOSITORY,
+  AD_ROUTE_PROVIDER,
+} from '@modules/ad/ad.di-tokens';
 import { AdEntity } from '@modules/ad/core/domain/ad.entity';
 import { AdRepositoryPort } from '../../ports/ad.repository.port';
-import { AggregateID, ConflictException } from '@mobicoop/ddd-library';
+import {
+  AggregateID,
+  ConflictException,
+  MessagePublisherPort,
+} from '@mobicoop/ddd-library';
 import { AdAlreadyExistsException } from '@modules/ad/core/domain/ad.errors';
 import { RouteProviderPort } from '../../ports/route-provider.port';
 import { Role } from '@modules/ad/core/domain/ad.types';
@@ -17,10 +25,14 @@ import {
 import { Waypoint } from '../../types/waypoint.type';
 import { Point as PointValueObject } from '@modules/ad/core/domain/value-objects/point.value-object';
 import { Point } from '@modules/geography/core/domain/route.types';
+import { MatcherAdCreationFailedIntegrationEvent } from '../../events/matcher-ad-creation-failed.integration-event';
+import { MATCHER_AD_CREATION_FAILED_ROUTING_KEY } from '@src/app.constants';
 
 @CommandHandler(CreateAdCommand)
 export class CreateAdService implements ICommandHandler {
   constructor(
+    @Inject(AD_MESSAGE_PUBLISHER)
+    private readonly messagePublisher: MessagePublisherPort,
     @Inject(AD_REPOSITORY)
     private readonly repository: AdRepositoryPort,
     @Inject(AD_ROUTE_PROVIDER)
@@ -44,6 +56,15 @@ export class CreateAdService implements ICommandHandler {
     );
 
     let typedRoutes: TypedRoute[];
+    let driverDistance: number | undefined;
+    let driverDuration: number | undefined;
+    let passengerDistance: number | undefined;
+    let passengerDuration: number | undefined;
+    let points: PointValueObject[] | undefined;
+    let fwdAzimuth: number | undefined;
+    let backAzimuth: number | undefined;
+
+    try {
       try {
         typedRoutes = await Promise.all(
           pathCreator.getBasePaths().map(async (path: Path) => ({
@@ -55,13 +76,6 @@ export class CreateAdService implements ICommandHandler {
         throw new Error('Unable to find a route for given waypoints');
       }
 
-    let driverDistance: number | undefined;
-    let driverDuration: number | undefined;
-    let passengerDistance: number | undefined;
-    let passengerDuration: number | undefined;
-    let points: PointValueObject[] | undefined;
-    let fwdAzimuth: number | undefined;
-    let backAzimuth: number | undefined;
       try {
         typedRoutes.forEach((typedRoute: TypedRoute) => {
           if ([PathType.DRIVER, PathType.GENERIC].includes(typedRoute.type)) {
@@ -77,7 +91,9 @@ export class CreateAdService implements ICommandHandler {
             fwdAzimuth = typedRoute.route.fwdAzimuth;
             backAzimuth = typedRoute.route.backAzimuth;
           }
-        if ([PathType.PASSENGER, PathType.GENERIC].includes(typedRoute.type)) {
+          if (
+            [PathType.PASSENGER, PathType.GENERIC].includes(typedRoute.type)
+          ) {
             passengerDistance = typedRoute.route.distance;
             passengerDuration = typedRoute.route.duration;
             if (!points)
@@ -95,6 +111,7 @@ export class CreateAdService implements ICommandHandler {
       } catch (error: any) {
         throw new Error('Invalid route');
       }
+
       const ad = AdEntity.create({
         id: command.id,
         driver: command.driver,
@@ -115,6 +132,7 @@ export class CreateAdService implements ICommandHandler {
         fwdAzimuth: fwdAzimuth as number,
         backAzimuth: backAzimuth as number,
       });
+
       try {
         await this.repository.insertExtra(ad, 'ad');
         return ad.id;
@@ -124,5 +142,21 @@ export class CreateAdService implements ICommandHandler {
         }
         throw error;
       }
+    } catch (error: any) {
+      const matcherAdCreationFailedIntegrationEvent =
+        new MatcherAdCreationFailedIntegrationEvent({
+          id: command.id,
+          metadata: {
+            correlationId: command.id,
+            timestamp: Date.now(),
+          },
+          cause: error.message,
+        });
+      this.messagePublisher.publish(
+        MATCHER_AD_CREATION_FAILED_ROUTING_KEY,
+        JSON.stringify(matcherAdCreationFailedIntegrationEvent),
+      );
+      throw error;
+    }
   }
 }

src/modules/ad/core/application/event-handlers/publish-message-when-matcher-ad-is-created.domain-event-handler.ts

@@ -0,0 +1,34 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+import { MatcherAdCreatedDomainEvent } from '../../domain/events/matcher-ad-created.domain-event';
+import { MessagePublisherPort } from '@mobicoop/ddd-library';
+import { AD_MESSAGE_PUBLISHER } from '@modules/ad/ad.di-tokens';
+import { MATCHER_AD_CREATED_ROUTING_KEY } from '@src/app.constants';
+import { MatcherAdCreatedIntegrationEvent } from '../events/matcher-ad-created.integration-event';
+
+@Injectable()
+export class PublishMessageWhenMatcherAdIsCreatedDomainEventHandler {
+  constructor(
+    @Inject(AD_MESSAGE_PUBLISHER)
+    private readonly messagePublisher: MessagePublisherPort,
+  ) {}
+
+  @OnEvent(MatcherAdCreatedDomainEvent.name, { async: true, promisify: true })
+  async handle(event: MatcherAdCreatedDomainEvent): Promise<any> {
+    const matcherAdCreatedIntegrationEvent =
+      new MatcherAdCreatedIntegrationEvent({
+        id: event.aggregateId,
+        driverDuration: event.driverDuration,
+        driverDistance: event.driverDistance,
+        passengerDuration: event.passengerDuration,
+        passengerDistance: event.passengerDistance,
+        fwdAzimuth: event.fwdAzimuth,
+        backAzimuth: event.backAzimuth,
+        metadata: event.metadata,
+      });
+    this.messagePublisher.publish(
+      MATCHER_AD_CREATED_ROUTING_KEY,
+      JSON.stringify(matcherAdCreatedIntegrationEvent),
+    );
+  }
+}

src/modules/ad/core/application/events/matcher-ad-created.integration-event.ts

@@ -0,0 +1,20 @@
+import { IntegrationEvent, IntegrationEventProps } from '@mobicoop/ddd-library';
+
+export class MatcherAdCreatedIntegrationEvent extends IntegrationEvent {
+  readonly driverDuration?: number;
+  readonly driverDistance?: number;
+  readonly passengerDuration?: number;
+  readonly passengerDistance?: number;
+  readonly fwdAzimuth: number;
+  readonly backAzimuth: number;
+
+  constructor(props: IntegrationEventProps<MatcherAdCreatedIntegrationEvent>) {
+    super(props);
+    this.driverDuration = props.driverDuration;
+    this.driverDistance = props.driverDistance;
+    this.passengerDuration = props.passengerDuration;
+    this.passengerDistance = props.passengerDistance;
+    this.fwdAzimuth = props.fwdAzimuth;
+    this.backAzimuth = props.backAzimuth;
+  }
+}

src/modules/ad/core/application/events/matcher-ad-creation-failed.integration-event.ts

@@ -0,0 +1,12 @@
+import { IntegrationEvent, IntegrationEventProps } from '@mobicoop/ddd-library';
+
+export class MatcherAdCreationFailedIntegrationEvent extends IntegrationEvent {
+  readonly cause?: string;
+
+  constructor(
+    props: IntegrationEventProps<MatcherAdCreationFailedIntegrationEvent>,
+  ) {
+    super(props);
+    this.cause = props.cause;
+  }
+}

src/modules/ad/core/application/queries/match/algorithm.abstract.ts

@@ -21,7 +21,6 @@ export abstract class Algorithm {
     for (const processor of this.processors) {
       this.candidates = await processor.execute(this.candidates);
     }
-    // console.log(JSON.stringify(this.candidates, null, 2));
     return this.candidates.map((candidate: CandidateEntity) =>
       MatchEntity.create({
         adId: candidate.id,

src/modules/ad/core/application/queries/match/selector/passenger-oriented.selector.ts

@@ -1,4 +1,4 @@
-import { Frequency, Role } from '@modules/ad/core/domain/ad.types';
+import { AdStatus, Frequency, Role } from '@modules/ad/core/domain/ad.types';
 import { Selector } from '../algorithm.abstract';
 import { Waypoint } from '../../../types/waypoint.type';
 import { Point } from '../../../types/point.type';
@@ -133,6 +133,7 @@ export class PassengerOrientedSelector extends Selector {
 
   private _createWhere = (role: Role): string =>
     [
+      this._whereStatus(),
       this._whereRole(role),
       this._whereStrict(),
       this._whereDate(),
@@ -144,6 +145,8 @@ export class PassengerOrientedSelector extends Selector {
       .filter((where: string) => where != '')
       .join(' AND ');
 
+  private _whereStatus = (): string => `status='${AdStatus.VALID}'`;
+
   private _whereRole = (role: Role): string =>
     role == Role.PASSENGER ? 'driver=True' : 'passenger=True';
 

src/modules/ad/core/domain/ad.entity.ts

@@ -1,12 +1,29 @@
 import { AggregateRoot, AggregateID } from '@mobicoop/ddd-library';
 import { AdProps, CreateAdProps } from './ad.types';
+import { MatcherAdCreatedDomainEvent } from './events/matcher-ad-created.domain-event';
 
 export class AdEntity extends AggregateRoot<AdProps> {
   protected readonly _id: AggregateID;
 
   static create = (create: CreateAdProps): AdEntity => {
     const props: AdProps = { ...create };
-    return new AdEntity({ id: create.id, props });
+    const ad = new AdEntity({ id: create.id, props });
+    ad.addEvent(
+      new MatcherAdCreatedDomainEvent({
+        metadata: {
+          correlationId: create.id,
+          timestamp: Date.now(),
+        },
+        aggregateId: create.id,
+        driverDistance: create.driverDistance,
+        driverDuration: create.driverDuration,
+        passengerDistance: create.passengerDistance,
+        passengerDuration: create.passengerDuration,
+        fwdAzimuth: create.fwdAzimuth,
+        backAzimuth: create.backAzimuth,
+      }),
+    );
+    return ad;
   };
 
   validate(): void {

src/modules/ad/core/domain/ad.types.ts

@@ -53,3 +53,10 @@ export enum Role {
   DRIVER = 'DRIVER',
   PASSENGER = 'PASSENGER',
 }
+
+export enum AdStatus {
+  PENDING = 'PENDING',
+  VALID = 'VALID',
+  INVALID = 'INVALID',
+  SUSPENDED = 'SUSPENDED',
+}

src/modules/ad/core/domain/events/matcher-ad-created.domain-event.ts

@@ -0,0 +1,20 @@
+import { DomainEvent, DomainEventProps } from '@mobicoop/ddd-library';
+
+export class MatcherAdCreatedDomainEvent extends DomainEvent {
+  readonly driverDuration?: number;
+  readonly driverDistance?: number;
+  readonly passengerDuration?: number;
+  readonly passengerDistance?: number;
+  readonly fwdAzimuth: number;
+  readonly backAzimuth: number;
+
+  constructor(props: DomainEventProps<MatcherAdCreatedDomainEvent>) {
+    super(props);
+    this.driverDuration = props.driverDuration;
+    this.driverDistance = props.driverDistance;
+    this.passengerDuration = props.passengerDuration;
+    this.passengerDistance = props.passengerDistance;
+    this.fwdAzimuth = props.fwdAzimuth;
+    this.backAzimuth = props.backAzimuth;
+  }
+}

src/modules/ad/interface/message-handlers/ad-created.message-handler.ts

@@ -13,7 +13,6 @@ export class AdCreatedMessageHandler {
     name: AD_CREATED_MESSAGE_HANDLER,
   })
   public async adCreated(message: string) {
-    try {
     const createdAd: Ad = JSON.parse(message);
     await this.commandBus.execute(
       new CreateAdCommand({
@@ -30,8 +29,5 @@ export class AdCreatedMessageHandler {
         waypoints: createdAd.waypoints,
       }),
     );
-    } catch (e: any) {
-      console.log(e);
-    }
   }
 }

src/modules/ad/tests/unit/core/create-ad.service.spec.ts

@@ -1,5 +1,9 @@
 import { Test, TestingModule } from '@nestjs/testing';
-import { AD_REPOSITORY, AD_ROUTE_PROVIDER } from '@modules/ad/ad.di-tokens';
+import {
+  AD_MESSAGE_PUBLISHER,
+  AD_REPOSITORY,
+  AD_ROUTE_PROVIDER,
+} from '@modules/ad/ad.di-tokens';
 import { AggregateID } from '@mobicoop/ddd-library';
 import { AdEntity } from '@modules/ad/core/domain/ad.entity';
 import { ConflictException } from '@mobicoop/ddd-library';
@@ -96,6 +100,10 @@ const mockRouteProvider: RouteProviderPort = {
   getDetailed: jest.fn(),
 };
 
+const mockMessagePublisher = {
+  publish: jest.fn().mockImplementation(),
+};
+
 describe('create-ad.service', () => {
   let createAdService: CreateAdService;
 
@@ -110,6 +118,10 @@ describe('create-ad.service', () => {
           provide: AD_ROUTE_PROVIDER,
           useValue: mockRouteProvider,
         },
+        {
+          provide: AD_MESSAGE_PUBLISHER,
+          useValue: mockMessagePublisher,
+        },
         CreateAdService,
       ],
     }).compile();

src/modules/ad/tests/unit/core/publish-message-when-matcher-ad-is-created.domain-event-handler.spec.ts

@@ -0,0 +1,57 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { AD_MESSAGE_PUBLISHER } from '@modules/ad/ad.di-tokens';
+import { MATCHER_AD_CREATED_ROUTING_KEY } from '@src/app.constants';
+import { PublishMessageWhenMatcherAdIsCreatedDomainEventHandler } from '@modules/ad/core/application/event-handlers/publish-message-when-matcher-ad-is-created.domain-event-handler';
+import { MatcherAdCreatedDomainEvent } from '@modules/ad/core/domain/events/matcher-ad-created.domain-event';
+
+const mockMessagePublisher = {
+  publish: jest.fn().mockImplementation(),
+};
+
+describe('Publish message when matcher ad is created domain event handler', () => {
+  let publishMessageWhenMatcherAdIsCreatedDomainEventHandler: PublishMessageWhenMatcherAdIsCreatedDomainEventHandler;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        {
+          provide: AD_MESSAGE_PUBLISHER,
+          useValue: mockMessagePublisher,
+        },
+        PublishMessageWhenMatcherAdIsCreatedDomainEventHandler,
+      ],
+    }).compile();
+
+    publishMessageWhenMatcherAdIsCreatedDomainEventHandler =
+      module.get<PublishMessageWhenMatcherAdIsCreatedDomainEventHandler>(
+        PublishMessageWhenMatcherAdIsCreatedDomainEventHandler,
+      );
+  });
+
+  it('should publish a message', () => {
+    jest.spyOn(mockMessagePublisher, 'publish');
+    const matcherAdCreatedDomainEvent: MatcherAdCreatedDomainEvent = {
+      id: 'some-domain-event-id',
+      aggregateId: 'some-aggregate-id',
+      metadata: {
+        timestamp: new Date('2023-06-28T05:00:00Z').getTime(),
+        correlationId: 'some-correlation-id',
+      },
+      driverDistance: 65845,
+      driverDuration: 3254,
+      fwdAzimuth: 90,
+      backAzimuth: 270,
+    };
+    publishMessageWhenMatcherAdIsCreatedDomainEventHandler.handle(
+      matcherAdCreatedDomainEvent,
+    );
+    expect(
+      publishMessageWhenMatcherAdIsCreatedDomainEventHandler,
+    ).toBeDefined();
+    expect(mockMessagePublisher.publish).toHaveBeenCalledTimes(1);
+    expect(mockMessagePublisher.publish).toHaveBeenCalledWith(
+      MATCHER_AD_CREATED_ROUTING_KEY,
+      '{"id":"some-aggregate-id","metadata":{"correlationId":"some-correlation-id","timestamp":1687928400000},"driverDuration":3254,"driverDistance":65845,"fwdAzimuth":90,"backAzimuth":270}',
+    );
+  });
+});