src: types

Author: krishpranav

src/types.ts

@@ -0,0 +1,24 @@
+/**
+ * @file types.ts
+ * @author Krisna Pranav
+ * @brief Types
+ * @version 1.0
+ * @date 2024-10-21
+ * 
+ * @copyright Copyright (c) 2024 Krisna Pranav
+ * 
+ */
+
+import { ImageSourcePropType } from "react-native";
+
+type Undefined<T> = { [P in keyof T]: P extends undefined ? T[P] : never};
+
+type FilterFlags<Base, Condition> = {
+    [Key in keyof Base]: Base[Key] extends Condition ? Key : never;
+};
+
+type AllowedNames<Base, Condition> = FilterFlags<Base, Condition>[keyof Base];
+type SubType<Base, Condition> = Pick<Base, AllowedNames<Base, Condition>>;
+
+export type OptionalKeys<T> = Exclude<keyof T, NonNullable<keyof SubType<Undefined<T>, never>>>;
+