`OmitNested` - A TypeScript type that omits nested object properties using dot notion.

OmitNested.ts

type AppendDotPathSegment<
	TPath extends string,
	TSegment extends string,
> = TPath extends "" ? TSegment : `${TPath}.${TSegment}`;

type AnyFunction = (...args: any[]) => any;
type Primitives =
	| boolean
	| string
	| number
	| symbol
	| unknown[]
	| null
	| undefined
	| void
	| AnyFunction;

type AllObjDotPaths<TObj, TPath extends string = ""> = TObj extends Primitives
	? TPath
	: {
			[P in keyof TObj]: P extends string
				?
						| AppendDotPathSegment<TPath, P>
						| AllObjDotPaths<TObj[P], AppendDotPathSegment<TPath, P>>
				: TPath;
	  }[keyof TObj];

type RecursiveOmitNested<
	TObj,
	TOmitPath extends string,
	TPath extends string = "",
> = TObj extends Primitives
	? TObj
	: {
			[P in keyof TObj as P extends string
				? AppendDotPathSegment<TPath, P> extends TOmitPath
					? never
					: P
				: never]: P extends string
				? RecursiveOmitNested<
						TObj[P],
						TOmitPath,
						AppendDotPathSegment<TPath, P>
				  >
				: TObj[P];
	  };

export type OmitNested<
	TObj,
	TOmitPath extends AllObjDotPaths<TObj>,
> = RecursiveOmitNested<TObj, TOmitPath>;