repos / starfx

obj.ts

 1import type { AnyState } from "../../types.js";
 2import type { BaseSchema } from "../types.js";
 3
 4export interface ObjOutput<V extends AnyState, S extends AnyState>
 5  extends BaseSchema<V> {
 6  schema: "obj";
 7  initialState: V;
 8  set: (v: V) => (s: S) => void;
 9  reset: () => (s: S) => void;
10  update: <P extends keyof V>(prop: { key: P; value: V[P] }) => (s: S) => void;
11  select: (s: S) => V;
12}
13
14export function createObj<V extends AnyState, S extends AnyState = AnyState>({
15  name,
16  initialState,
17}: {
18  name: keyof S;
19  initialState: V;
20}): ObjOutput<V, S> {
21  return {
22    schema: "obj",
23    name: name as string,
24    initialState,
25    set: (value) => (state) => {
26      // deno-lint-ignore no-explicit-any
27      (state as any)[name] = value;
28    },
29    reset: () => (state) => {
30      // deno-lint-ignore no-explicit-any
31      (state as any)[name] = initialState;
32    },
33    update:
34      <P extends keyof V>(prop: { key: P; value: V[P] }) =>
35      (state) => {
36        // deno-lint-ignore no-explicit-any
37        (state as any)[name][prop.key] = prop.value;
38      },
39    select: (state) => {
40      // deno-lint-ignore no-explicit-any
41      return (state as any)[name];
42    },
43  };
44}
45
46export function obj<V extends AnyState>(initialState: V) {
47  return (name: string) => createObj<V, AnyState>({ name, initialState });
48}