ts-deep-pick/lib/DeepMutate.d.ts

TypeScript utility generating new types by deep picking/omitting, leveraging Template Literal Types from TypeScript >= 4.1

import { Primitive, UnionKeyOf } from "ts-typetools";
import { DeepMutatePath } from "./DeepMutatePath";
import { DeepPick } from "./DeepPick";
import { DeepPickGrammar, DefaultGrammar } from "./DeepPickGrammar";
import { DeepPickPath } from "./DeepPickPath";
import { Opaque } from "./Opaque";
export declare type DeepMutate<T, K extends DeepMutatePath<T, G>, M extends MutationSpec<DeepPick<T, Extract<K, DeepPickPath<T>>>, G>, G extends DeepPickGrammar = DefaultGrammar> = T extends Opaque ? T : [K] extends [G["glob"]] ? Mutate<T, M, G> : T extends Primitive ? T : T extends Array<infer Item> ? [K] extends [`${G["array"]}${G["prop"]}${infer K}`] ? DeepMutate<Item, K, InnerMutationSpec<G["array"], M, G>, G>[] : [K] extends [`${G["array"]}`] ? DeepMutate<Item, G["glob"], InnerMutationSpec<G["array"], M, G>, G>[] : never : Rename<{
    [key in UnionKeyOf<T>]: [K] extends [`${key}${G["prop"]}${infer K}`] ? DeepMutate<T[key], K, InnerMutationSpec<key, M, G>, G> : [K] extends [key] ? DeepMutate<T[key], G["glob"], InnerMutationSpec<key, M, G>, G> : T[key];
}, T>;
declare type Rename<T, Alias extends T> = T extends Alias ? Alias extends T ? Alias : T : T;
declare type InnerKey<key extends string, K, G extends DeepPickGrammar> = [
    K extends `${key}${G["prop"]}${infer K}` ? K : never
][0];
declare type Mutate<T, Spec extends MutationSpec<T, G>, G extends DeepPickGrammar> = Spec extends string ? DeepPick<T, Extract<Spec, DeepPickPath<T, G>>, G> : Spec extends {
    extract: infer U;
} ? Extract<T, U> : Spec extends {
    exclude: infer U;
} ? Exclude<T, U> : Spec extends {
    replace: infer U;
} ? U : T;
declare type InnerMutationSpec<key extends string, M extends MutationSpec<any, G>, G extends DeepPickGrammar> = M extends string ? InnerKey<key, M, G> : M;
export declare type MutationSpec<T, G extends DeepPickGrammar> = DeepPickPath<T, G> | {
    extract: any;
} | {
    exclude: any;
} | {
    replace: any;
};
export {};
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