change reaction api

package.json

@@ -40,6 +40,7 @@
         "prettier": "^2.7.1",
         "redux-toolkit": "^1.1.2",
         "typescript": "^4.9.5",
+        "vite": "^4.2.1",
         "vitest": "0.23.1"
     }
 }

src/Updux.ts

@@ -56,7 +56,7 @@ type ResolveActions<
     };
 
 type Reaction<S = any, M extends MiddlewareAPI = MiddlewareAPI> =
-    (api: M, state: S, previousState: S, unsubscribe: () => void) => void;
+    (api: M) => (state: S, previousState: S, unsubscribe: () => void) => any;
 
 type AugmentedMiddlewareAPI<S, A, SELECTORS> =
     MiddlewareAPI<Dispatch<AnyAction>, S> & {
@@ -217,6 +217,8 @@ export default class Updux<
             unsub = store.subscribe(() => r(unsub));
         }
 
+        (store as any).actions = this.actions;
+
 
         return store as ToolkitStore<
             AggregateState<T_LocalState, T_Subduxes>
@@ -326,12 +328,13 @@ export default class Updux<
                 this.actions,
                 this.selectors
             );
+            const r = reaction(api);
             return (unsub: () => void) => {
                 const state = api.getState();
                 if (state === previous) return;
                 let p = previous;
                 previous = state;
-                reaction(api, state, p, unsub);
+                r(state, p, unsub);
             }
         }
             ;

src/reactions.test.ts

@@ -11,7 +11,7 @@ test('basic reactions', () => {
     foo.addMutation(foo.actions.inc, () => (state) => state + 1);
     foo.addMutation(foo.actions.reset, () => (state) => 0);
 
-    foo.addReaction((api, state, _previous, unsubscribe) => {
+    foo.addReaction((api) => (state, _previous, unsubscribe) => {
         if (state < 3) return;
         unsubscribe();
         api.dispatch.reset();
@@ -53,7 +53,7 @@ test('subdux reactions', () => {
     bar.addMutation(foo.actions.reset, () => (state) => 0);
 
     let seen = 0;
-    bar.addReaction((api, state, _previous, unsubscribe) => {
+    bar.addReaction((api) => (state, _previous, unsubscribe) => {
         seen++;
         expect(api.actions).not.toHaveProperty('notInBar');
         expect(state).toBeTypeOf('number');

src/reducer.ts

@@ -3,6 +3,7 @@ import { BaseActionCreator } from '@reduxjs/toolkit/dist/createAction.js';
 import * as R from 'remeda';
 import { Dux } from './types.js';
 import { Mutation } from './Updux.js';
+import u from '@yanick/updeep-remeda';
 
 export type MutationCase = {
     matcher: (action: Action) => boolean;
@@ -22,6 +23,7 @@ export function buildReducer(
     // TODO defaultMutation
     //
     const reducer = (state = initialState, action: Action) => {
+        const orig = state;
         if (!action?.type)
             throw new Error('upreducer called with a bad action');
 
@@ -49,7 +51,7 @@ export function buildReducer(
 
         if (!terminal && Object.keys(subduxes).length > 0) {
             // subduxes
-            state = R.merge(
+            state = u.update(
                 state,
                 R.mapValues(subReducers, (reducer, slice) =>
                     (reducer as any)(state[slice], action),