Strongly type useSettings (supersedes #559)

1 files changed, 15 insertions, 3 deletions

diff --git a/src/api/settings.ts b/src/api/settings.ts
index c551df0..1ca2611 100644
--- a/src/api/settings.ts
+++ b/src/api/settings.ts
@@ -167,11 +167,11 @@ export const Settings = makeProxy(settings);
  * @returns Settings
  */
 // TODO: Representing paths as essentially "string[].join('.')" wont allow dots in paths, change to "paths?: string[][]" later
-export function useSettings(paths?: string[]) {
+export function useSettings(paths?: UseSettings<Settings>[]) {
     const [, forceUpdate] = React.useReducer(() => ({}), {});
 
     const onUpdate: SubscriptionCallback = paths
-        ? (value, path) => paths.includes(path) && forceUpdate()
+        ? (value, path) => paths.includes(path as UseSettings<Settings>) && forceUpdate()
         : forceUpdate;
 
     React.useEffect(() => {
@@ -229,7 +229,7 @@ export function definePluginSettings<D extends SettingsDefinition, C extends Set
             return Settings.plugins[definedSettings.pluginName] as any;
         },
         use: settings => useSettings(
-            settings?.map(name => `plugins.${definedSettings.pluginName}.${name}`)
+            settings?.map(name => `plugins.${definedSettings.pluginName}.${name}`) as UseSettings<Settings>[]
         ).plugins[definedSettings.pluginName] as any,
         def,
         checks: checks ?? {},
@@ -237,3 +237,15 @@ export function definePluginSettings<D extends SettingsDefinition, C extends Set
     };
     return definedSettings;
 }
+
+type UseSettings<T extends object> = ResolveUseSettings<T>[keyof T];
+
+type ResolveUseSettings<T extends object> = {
+    [Key in keyof T]:
+    Key extends string
+    ? T[Key] extends Record<string, unknown>
+    // @ts-ignore "Type instantiation is excessively deep and possibly infinite"
+    ? UseSettings<T[Key]> extends string ? `${Key}.${UseSettings<T[Key]>}` : never
+    : Key
+    : never;
+};