Fix profanity filter breaking if locale isn't set

frontend/src/App.vue

@@ -34,7 +34,7 @@ const apiUrl = inject(apiUrlKey);
 const route = useRoute();
 const routeName = typeof route.name === 'string' ? route.name : '';
 const router = useRouter();
-const lang = localStorage?.getItem('locale') ?? navigator.language;
+const lang = localStorage?.getItem('locale') ?? navigator.language.split('-')[0];
 
 const siteNotificationStore = useSiteNotificationStore();
 const {
@@ -51,7 +51,9 @@ const {
 } = siteNotificationStore;
 
 // Handle input filters
-const languageList = lang === 'en' ? ['en'] : [lang, 'en']
+// The library will error if we supply it with an unsupported language
+const supportedLanguages = ['en', 'de'];
+const languageList = supportedLanguages.indexOf(lang) !== -1 && lang !== 'en' ? [lang, 'en'] : ['en'];
 const profanity = new Profanity({ languages: languageList });
 const hasProfanity = (input: string) => profanity.exists(input);
 provide(hasProfanityKey, hasProfanity);

frontend/src/composables/i18n.ts

@@ -9,7 +9,7 @@ const messages = {
   de, // German
   en, // English
 };
-const loc = localStorage?.getItem('locale') ?? navigator.language;
+const loc = localStorage?.getItem('locale') ?? navigator.language.split('-')[0];
 const instance = createI18n({
   legacy: false,
   globalInjection: true,

frontend/src/main.ts

@@ -72,7 +72,7 @@ const apiUrl = `${protocol}://${import.meta.env.VITE_API_URL}${port}`;
 app.provide(apiUrlKey, apiUrl);
 app.provide(bookingUrlKey, `${protocol}://${import.meta.env.VITE_BASE_URL}/appointments/all/`);
 
-const loc = localStorage?.getItem('locale') ?? navigator.language;
+const loc = localStorage?.getItem('locale') ?? navigator.language.split('-')[0];
 app.use(i18ninstance);
 useDayJS(app, loc);