feat(article): implémentation de la méthode egal/getId d'ArticleRSS

src/article.ts

@@ -4,6 +4,7 @@ import { Writable } from 'stream';
 export interface Article {
   affiche(sortie: Writable): void;
   egal(autreArticle: Article): boolean;
+  getId(): string | undefined;
 }
 
 export class ArticleRSS implements Article {
@@ -25,5 +26,14 @@ export class ArticleRSS implements Article {
     sortie.write(`\n`);
   }
 
-  egal(autreArticle: Article) { return false };
+  egal(autreArticle: Article) {
+    if (autreArticle.getId() == undefined || this.getId() == undefined) {
+      return false;
+    }
+    return autreArticle.getId() == this.getId();
+  };
+
+  public getId(): string | undefined {
+    return this.item.guid || this.item.link || this.item.content;
+  }
 }