feat: Updates DeepL auto translate provider to get supported languages from API (RocketChat#37250)

Author: abhinavkrin

.changeset/wild-impalas-sip.md

@@ -0,0 +1,5 @@
+---
+'@rocket.chat/meteor': minor
+---
+
+Updates AutoTranslate to fetch supported languages dynamically from DeepL API.

apps/meteor/app/autotranslate/server/deeplTranslate.ts

@@ -34,6 +34,8 @@ class DeeplAutoTranslate extends AutoTranslate {
 
 	apiEndPointUrl: string;
 
+	private supportedLanguageEndpointUrl: string;
+
 	/**
 	 * setup api reference to deepl translate to be used as message translation provider.
 	 * @constructor
@@ -50,9 +52,11 @@ class DeeplAutoTranslate extends AutoTranslate {
 			// if the api key ends with `:fx` it is a free api key
 			if (/:fx$/.test(value)) {
 				this.apiEndPointUrl = freeApiEndpoint;
+				this.supportedLanguageEndpointUrl = `https://api-free.deepl.com/v2/languages`;
 				return;
 			}
 			this.apiEndPointUrl = proApiEndpoint;
+			this.supportedLanguageEndpointUrl = `https://api.deepl.com/v2/languages`;
 		});
 	}
 
@@ -97,106 +101,28 @@ class DeeplAutoTranslate extends AutoTranslate {
 		if (this.supportedLanguages[target]) {
 			return this.supportedLanguages[target];
 		}
-		this.supportedLanguages[target] = [
-			{
-				language: 'bg',
-				name: i18n.t('Language_Bulgarian', { lng: target }),
-			},
-			{
-				language: 'cs',
-				name: i18n.t('Language_Czech', { lng: target }),
-			},
-			{
-				language: 'da',
-				name: i18n.t('Language_Danish', { lng: target }),
-			},
-			{
-				language: 'de',
-				name: i18n.t('Language_German', { lng: target }),
-			},
-			{
-				language: 'el',
-				name: i18n.t('Language_Greek', { lng: target }),
-			},
-			{
-				language: 'en',
-				name: i18n.t('Language_English', { lng: target }),
-			},
-			{
-				language: 'es',
-				name: i18n.t('Language_Spanish', { lng: target }),
-			},
-			{
-				language: 'et',
-				name: i18n.t('Language_Estonian', { lng: target }),
-			},
-			{
-				language: 'fi',
-				name: i18n.t('Language_Finnish', { lng: target }),
-			},
-			{
-				language: 'fr',
-				name: i18n.t('Language_French', { lng: target }),
-			},
-			{
-				language: 'hu',
-				name: i18n.t('Language_Hungarian', { lng: target }),
-			},
-			{
-				language: 'it',
-				name: i18n.t('Language_Italian', { lng: target }),
-			},
-			{
-				language: 'ja',
-				name: i18n.t('Language_Japanese', { lng: target }),
-			},
-			{
-				language: 'lt',
-				name: i18n.t('Language_Lithuanian', { lng: target }),
-			},
-			{
-				language: 'lv',
-				name: i18n.t('Language_Latvian', { lng: target }),
-			},
-			{
-				language: 'nl',
-				name: i18n.t('Language_Dutch', { lng: target }),
-			},
-			{
-				language: 'pl',
-				name: i18n.t('Language_Polish', { lng: target }),
-			},
-			{
-				language: 'pt',
-				name: i18n.t('Language_Portuguese', { lng: target }),
-			},
-			{
-				language: 'ro',
-				name: i18n.t('Language_Romanian', { lng: target }),
-			},
-			{
-				language: 'ru',
-				name: i18n.t('Language_Russian', { lng: target }),
-			},
-			{
-				language: 'sk',
-				name: i18n.t('Language_Slovak', { lng: target }),
-			},
-			{
-				language: 'sl',
-				name: i18n.t('Language_Slovenian', { lng: target }),
-			},
-			{
-				language: 'sv',
-				name: i18n.t('Language_Swedish', { lng: target }),
-			},
-			{
-				language: 'zh',
-				name: i18n.t('Language_Chinese', { lng: target }),
+		let result: (ISupportedLanguage & { supports_formality?: boolean })[] = [];
+
+		const request = await fetch(this.supportedLanguageEndpointUrl, {
+			params: { type: 'target' },
+			headers: {
+				Authorization: `DeepL-Auth-Key ${this.apiKey}`,
 			},
-		];
+		});
+		if (!request.ok) {
+			throw new Error('Failed to fetch supported languages');
+		}
+
+		result = (await request.json()) as typeof result;
 
-		return this.supportedLanguages[target];
+		if (this.supportedLanguages[target]) {
+			return this.supportedLanguages[target];
+		}
+		this.supportedLanguages[target || 'en'] = result.map(({ language, ...other }) => ({
+			...other,
+			language: new Intl.Locale(language).toString(),
+		}));
+		return this.supportedLanguages[target || 'en'];
 	}
 
 	/**