Parameterises translation

1 files changed, 14 insertions, 3 deletions

diff --git a/src/i18n/translate.ts b/src/i18n/translate.ts
index b407e3b..b911547 100644
--- a/src/i18n/translate.ts
+++ b/src/i18n/translate.ts
@@ -1,9 +1,20 @@
 import type Locale from '../types/Locale';
-import type { TranslationsDictionary } from '../types/TranslationsDictionary';
+import type { TranslationsDictionary, Translation } from '../types/TranslationsDictionary';
 import { defaultLocale } from './locales';
 
+type TranslationsDictionaryWith<Key extends string, Params> = TranslationsDictionary<{
+  [key in Key]: { [locale in typeof defaultLocale]: Translation<Params> } & {
+    [locale in Locale]?: Translation<Params>;
+  };
+}>;
+
 export default function (locale: Locale) {
-  return function <T extends string>(dict: TranslationsDictionary<T>, key: T) {
-    return dict[key][locale] ?? dict[key][defaultLocale];
+  return function <
+    Key extends string,
+    Params,
+    Dict extends TranslationsDictionaryWith<Key, Params>,
+  >(dict: Dict, params: { key: Key } & { [Param in keyof Params]: string }) {
+    const translation = dict[params.key][locale] ?? dict[params.key][defaultLocale];
+    return translation(params);
   };
 }