Add date added to collection in daily email

apps/spin-cycle/src/mailer/mailer.service.ts

@@ -8,8 +8,8 @@ import * as process from 'node:process';
 export class MailerService {
   private readonly logger: Logger = new Logger(MailerService.name);
 
-  sendRecommendationMail(spin: SpinEntity, user: UserEntity): Promise<MessagesSendResult> {
-    return this.sendMail([user.email], this.getRecommendationSubject(), this.getRecommendationBody(spin));
+  sendRecommendationMail(spin: SpinEntity, user: UserEntity, dateAdded?: string): Promise<MessagesSendResult> {
+    return this.sendMail([user.email], this.getRecommendationSubject(), this.getRecommendationBody(spin, dateAdded));
   }
 
   sendAdminSignupMail(user: UserEntity): Promise<MessagesSendResult> {
@@ -38,16 +38,31 @@ export class MailerService {
     return `Your ${month} ${day} record-mendation from SpinCycle has arrived! 😤`;
   }
 
-  private getRecommendationBody(spin: SpinEntity): string {
+  private getRecommendationBody(spin: SpinEntity, dateAdded?: string): string {
+    const addedLine = dateAdded
+      ? `<p>This release was added to your collection on <strong>${this.formatDate(dateAdded)}</strong></p>`
+      : '';
+
     return `
       <p>Hello there!</p>
       <p>Today's randomly selected record from your collection is:</p>
       <p><strong>${spin.recordName}</strong> by <strong>${spin.artistName}</strong></p>
+      ${addedLine}
       <p><a href="https://discogs.com/release/${spin.discogsId}">View record on Discogs</a></p>
       <p>Happy spinning!</p>
     `;
   }
 
+  private formatDate(iso: string): string {
+    const d = new Date(iso);
+    if (Number.isNaN(d.getTime())) return iso;
+    return d.toLocaleDateString(undefined, {
+      year: 'numeric',
+      month: 'short',
+      day: 'numeric',
+    });
+  }
+
   private getClient(): IMailgunClient {
     return new Mailgun(FormData).client({
       username: 'api',

apps/spin-cycle/src/worker/worker.service.ts

@@ -42,11 +42,11 @@ export class WorkerService {
       return this.markUserAsAllPlayed(user);
     }
 
-    const { discogsId, artistName, recordName } = nextSpin;
+    const { discogsId, artistName, recordName, dateAdded } = nextSpin;
     const releaseSpin: SpinEntity = new SpinEntity(null, user, discogsId, artistName, recordName, new Date());
     await Promise.all([
       this.spinsService.create(releaseSpin),
-      this.mailerService.sendRecommendationMail(releaseSpin, user),
+      this.mailerService.sendRecommendationMail(releaseSpin, user, dateAdded),
     ]);
   }
 

libs/shared/src/lib/discogs-response.ts

@@ -4,6 +4,8 @@ export interface IDiscogsReleases extends IDiscogsResponse {
 
 export interface IDiscogsRelease {
   id: number;
+  // When the user added this release to their collection
+  date_added?: string;
   basic_information: {
     title: string;
     resource_url: string;

libs/shared/src/lib/dto/release-out.ts

@@ -4,15 +4,18 @@ export class ReleaseOut {
   discogsId: number;
   artistName: string;
   recordName: string;
+  // ISO string from Discogs indicating when the item was added to the user's collection
+  dateAdded?: string;
 
-  constructor(discogsId: number, artistName: string, recordName: string) {
+  constructor(discogsId: number, artistName: string, recordName: string, dateAdded?: string) {
     this.discogsId = discogsId;
     this.artistName = artistName;
     this.recordName = recordName;
+    this.dateAdded = dateAdded;
   }
 
   static fromDiscogsResponse(release: IDiscogsRelease): ReleaseOut {
     const joinedArtists: string = release.basic_information.artists.map((artist) => artist.name).join(', ');
-    return new ReleaseOut(release.id, joinedArtists, release.basic_information.title);
+    return new ReleaseOut(release.id, joinedArtists, release.basic_information.title, release.date_added);
   }
 }