Switch to resolve function w/ class comparison instead of strings

Author: CarsonF

src/components/ceremony/handlers/create-engagement-default-ceremony.handler.ts

@@ -2,6 +2,7 @@ import { node, relation } from 'cypher-query-builder';
 import { DateTime } from 'luxon';
 import { ConfigService, EventsHandler, IEventHandler } from '~/core';
 import { DatabaseService } from '~/core/database';
+import { LanguageEngagement } from '../../engagement/dto';
 import { EngagementCreatedEvent } from '../../engagement/events';
 import { CeremonyService } from '../ceremony.service';
 import { CeremonyType } from '../dto';
@@ -20,7 +21,7 @@ export class CreateEngagementDefaultCeremonyHandler
     const { engagement } = event;
     const input = {
       type:
-        engagement.__typename === 'LanguageEngagement'
+        LanguageEngagement.resolve(engagement) === LanguageEngagement
           ? CeremonyType.Dedication
           : CeremonyType.Certification,
     };

src/components/engagement/dto/engagement.dto.ts

@@ -63,6 +63,7 @@ class Engagement extends Interfaces {
   static readonly Props: string[] = keysOf<Engagement>();
   static readonly SecuredProps: string[] = keysOf<SecuredProps<Engagement>>();
   static readonly Parent = import('../../project/dto').then((m) => m.IProject);
+  static readonly resolve = resolveEngagementType;
 
   declare readonly __typename: 'LanguageEngagement' | 'InternshipEngagement';
 

src/components/engagement/engagement.resolver.ts

@@ -60,7 +60,7 @@ export class EngagementResolver {
     @Loader(EngagementLoader) engagements: LoaderOf<EngagementLoader>,
   ): Promise<Engagement> {
     const engagement = await engagements.load(key);
-    if (engagement.__typename !== 'LanguageEngagement') {
+    if (LanguageEngagement.resolve(engagement) !== LanguageEngagement) {
       throw new InvalidIdForTypeException();
     }
     return engagement;

src/components/engagement/events/engagement-created.event.ts

@@ -18,13 +18,13 @@ export class EngagementCreatedEvent {
     engagement: UnsecuredDto<LanguageEngagement>;
     input: CreateLanguageEngagement;
   } {
-    return this.engagement.__typename === 'LanguageEngagement';
+    return LanguageEngagement.resolve(this.engagement) === LanguageEngagement;
   }
 
   isInternshipEngagement(): this is EngagementCreatedEvent & {
     engagement: UnsecuredDto<InternshipEngagement>;
     input: CreateInternshipEngagement;
   } {
-    return this.engagement.__typename === 'InternshipEngagement';
+    return LanguageEngagement.resolve(this.engagement) === InternshipEngagement;
   }
 }

src/components/engagement/events/engagement-updated.event.ts

@@ -19,13 +19,13 @@ export class EngagementUpdatedEvent {
     updated: UnsecuredDto<LanguageEngagement>;
     input: UpdateLanguageEngagement;
   } {
-    return this.updated.__typename === 'LanguageEngagement';
+    return LanguageEngagement.resolve(this.updated) === LanguageEngagement;
   }
 
   isInternshipEngagement(): this is EngagementUpdatedEvent & {
     updated: UnsecuredDto<InternshipEngagement>;
     input: UpdateInternshipEngagement;
   } {
-    return this.updated.__typename === 'InternshipEngagement';
+    return LanguageEngagement.resolve(this.updated) === InternshipEngagement;
   }
 }

src/components/engagement/handlers/set-initial-end-date.handler.ts

@@ -6,7 +6,7 @@ import {
   ILogger,
   Logger,
 } from '~/core';
-import { EngagementStatus } from '../dto';
+import { EngagementStatus, LanguageEngagement } from '../dto';
 import { EngagementRepository } from '../engagement.repository';
 import { EngagementService } from '../engagement.service';
 import { EngagementCreatedEvent, EngagementUpdatedEvent } from '../events';
@@ -49,7 +49,7 @@ export class SetInitialEndDate implements IEventHandler<SubscribedEvent> {
       const initialEndDate = engagement.endDate;
 
       const type =
-        engagement.__typename === 'LanguageEngagement'
+        LanguageEngagement.resolve(engagement) === LanguageEngagement
           ? 'Language'
           : 'Internship';
       await this.engagementRepo[`update${type}`](

src/components/engagement/handlers/set-last-status-date.handler.ts

@@ -7,11 +7,7 @@ import {
   Logger,
 } from '~/core';
 import { DatabaseService } from '~/core/database';
-import {
-  EngagementStatus,
-  InternshipEngagement,
-  LanguageEngagement,
-} from '../dto';
+import { EngagementStatus, IEngagement } from '../dto';
 import { EngagementUpdatedEvent } from '../events';
 
 @EventsHandler(EngagementUpdatedEvent)
@@ -48,10 +44,7 @@ export class SetLastStatusDate
       } as const;
 
       event.updated = await this.db.updateProperties({
-        type:
-          updated.__typename === 'LanguageEngagement'
-            ? LanguageEngagement
-            : InternshipEngagement,
+        type: IEngagement.resolve(updated),
         object: updated,
         changes,
       });