stop redundant jokes

js/JokeService.js

@@ -3,7 +3,8 @@ class JokeService {
     constructor(categories = ['programming', 'coding', 'development'], lang = 'en') {
         this.categories = Array.isArray(categories) ? categories : [categories];
         this.lang = lang;
-        this.apiBaseUrl = 'https://v2.jokeapi.dev/joke/'
+        this.apiBaseUrl = 'https://v2.jokeapi.dev/joke/';
+        this.toldJokes = localStorage.getItem('toldJokes') !== null ? JSON.parse(localStorage.getItem('toldJokes')) : [];
     }
 
     setCategory(category) {
@@ -17,6 +18,11 @@ class JokeService {
             service.apiBaseUrl + service.categories.join(',') + '?lang=' + service.lang
         ).then((response) => {
             if (response.data.error === false) {
+                if (service.toldJokes.includes(response.data.id)) {
+                    service.tell();
+                    return false;
+                }
+
                 service.show(response.data);
             }
         }).catch((error) => {
@@ -25,16 +31,26 @@ class JokeService {
     }
 
     show(joke) {
+        let service = this;
         if (joke.type === 'twopart') {
             setTimeout(() => {
                 showNotification(joke.delivery)
             }, 4000);
 
             showNotification(joke.setup);
+            service.jokeTold(joke);
         } else {
             showNotification(joke.joke);
         }
     }
+
+    jokeTold(joke) {
+        this.toldJokes.push(joke.id);
+        localStorage.setItem('toldJokes', JSON.stringify(this.toldJokes));
+    }
+
+    getToldJokes() {
+    }
 }
 
 function showNotification(text) {