repos / starfx

obj.ts

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