[WIP] redux extension integration

src/utils/reactive.ts

@@ -5,6 +5,7 @@
 */
 import { scheduleRevalidate } from '@/utils/runtime';
 import { isFn, isTag, isTagLike, debugContext } from '@/utils/shared';
+import { supportChromeExtension } from './redux-devtools';
 
 export const asyncOpcodes = new WeakSet<tagOp>();
 // List of DOM operations for each tag
@@ -340,3 +341,28 @@ export function getTracker() {
 export function setTracker(tracker: Set<Cell> | null) {
   currentTracker = tracker;
 }
+
+supportChromeExtension({
+  get() {
+    const cells = {};
+    DEBUG_CELLS.forEach((cell, index) => {
+      cells[`${cell._debugName}:${index}`] = cell._value;
+    });
+    return cells;
+  },
+  skipDispatch: 0,
+  set() {
+    console.log('set', ...arguments);
+  },
+  on(timeLine: string, fn: () => any) {
+    console.log('on', timeLine, fn);
+    setTimeout(() => {
+      // debugger;
+      fn.call(this, 'updates', {})
+
+    }, 2000);
+  },
+  trigger() {
+    console.log('trigger', ...arguments);
+  }
+});

src/utils/redux-devtools.ts

@@ -0,0 +1,200 @@
+// inspired by https://www.npmjs.com/package/freezer-redux-devtools?activeTab=code
+var ActionTypes = {
+	INIT: '@@INIT',
+	PERFORM_ACTION: 'PERFORM_ACTION',
+	TOGGLE_ACTION: 'TOGGLE_ACTION'
+};
+
+type Listener = () => void;
+
+/**
+ * Redux middleware to make freezer and devtools
+ * talk to each other.
+ * @param {Freezer} State Freezer's app state.
+ */
+export function FreezerMiddleware( State ){
+	return function( next ){
+		return function StoreEnhancer( someReducer, someState ){
+			var commitedState = State.get(),
+				lastAction = 0,
+				/**
+				 * Freezer reducer will trigger events on any
+				 * devtool action to synchronize freezer's and
+				 * devtool's states.
+				 *
+				 * @param  {Object} state  Current devtool state.
+				 * @param  {Object} action Action being dispatched.
+				 * @return {Object}        Freezer state after the action.
+				 */
+				reducer = function( state, action ){
+					if( action.type == ActionTypes.INIT ){
+						State.set( state || commitedState );
+					}
+					else if( lastAction != ActionTypes.PERFORM_ACTION ) {
+						// Flag that we are dispatching to not
+						// to dispatch the same action twice
+						State.skipDispatch = 1;
+						State.trigger.apply( State, [ action.type ].concat( action.arguments || [] ) );
+					}
+					// The only valid state is freezer's one.
+					return State.get();
+				},
+				store = next( reducer ),
+				liftedStore = store.liftedStore,
+				dtStore = store.devToolsStore || store.liftedStore,
+
+				toolsDispatcher = dtStore.dispatch
+			;
+
+			// Override devTools store's dispatch, to set commitedState
+			// on Commit action.
+			dtStore.dispatch = function( action ){
+				lastAction = action.type;
+
+				// If we are using redux-devtools we need to reset the state
+				// to the last valid one manually
+				if( liftedStore && lastAction == ActionTypes.TOGGLE_ACTION ){
+					var states = dtStore.getState().computedStates,
+						nextValue = states[ action.id - 1].state
+					;
+
+					State.set( nextValue );
+				}
+
+				toolsDispatcher.apply( dtStore, arguments );
+
+				return action;
+			};
+
+			// Dispatch any freezer "fluxy" event to let the devTools
+			// know about the update.
+			State.on('afterAll', function( reactionName ){
+				if( reactionName == 'update')
+					return;
+
+				// We don't dispatch if the flag is true
+				if( this.skipDispatch )
+					this.skipDispatch = 0;
+				else {
+					var args = [].slice.call( arguments, 1 );
+					store.dispatch({ type: reactionName, args: args });
+				}
+			});
+
+			return store;
+		};
+	};
+}
+
+/**
+ * Binds freezer store to the chrome's redux-devtools extension.
+ * @param {Freezer} State Freezer's app state
+ */
+export function supportChromeExtension( State ){
+    var devtools = window.__REDUX_DEVTOOLS_EXTENSION__
+  ? window.__REDUX_DEVTOOLS_EXTENSION__()
+  : (f) => f;
+
+	compose(
+		FreezerMiddleware( State ),
+		devtools
+	)(createStore)( function( state ){
+		return state;
+	});
+}
+
+
+/**
+ * Creates a valid redux store. Copied directly from redux.
+ * https://github.com/rackt/redux
+ */
+function createStore(reducer: any, initialState: any) {
+
+
+  if (typeof reducer !== 'function') {
+    throw new Error('Expected the reducer to be a function.');
+  }
+
+  var currentReducer = reducer;
+  var currentState = initialState;
+  var listeners: Listener[] = [];
+  var isDispatching = false;
+  var ActionTypes = {
+	 INIT: '@@redux/INIT'
+  };
+
+  function getState() {
+    return currentState;
+  }
+
+  function subscribe(listener: Listener) {
+    listeners.push(listener);
+    var isSubscribed = true;
+
+    return function unsubscribe() {
+      if (!isSubscribed) {
+        return;
+      }
+
+      isSubscribed = false;
+      var index = listeners.indexOf(listener);
+      listeners.splice(index, 1);
+    };
+  }
+
+  function dispatch(action: { type: string | undefined }) {
+    if (typeof action.type === 'undefined') {
+      throw new Error('Actions may not have an undefined "type" property. ' + 'Have you misspelled a constant?');
+    }
+
+    if (isDispatching) {
+      throw new Error('Reducers may not dispatch actions.');
+    }
+
+    try {
+      isDispatching = true;
+      currentState = currentReducer(currentState, action);
+    } finally {
+      isDispatching = false;
+    }
+
+    listeners.slice().forEach(function (listener) {
+      return listener();
+    });
+    return action;
+  }
+
+  function replaceReducer(nextReducer: any) {
+    currentReducer = nextReducer;
+    dispatch({ type: ActionTypes.INIT });
+  }
+
+  // When a store is created, an "INIT" action is dispatched so that every
+  // reducer returns their initial state. This effectively populates
+  // the initial state tree.
+  dispatch({ type: ActionTypes.INIT });
+
+  return {
+    dispatch: dispatch,
+    subscribe: subscribe,
+    getState: getState,
+    replaceReducer: replaceReducer
+  };
+}
+
+/**
+ * Composes single-argument functions from right to left.
+ * Copied directly from redux.
+ * https://github.com/rackt/redux
+ */
+function compose() {
+  for (var _len = arguments.length, funcs = Array(_len), _key = 0; _key < _len; _key++) {
+    funcs[_key] = arguments[_key];
+  }
+
+  return function (arg: any) {
+    return funcs.reduceRight(function (composed, f) {
+      return f(composed);
+    }, arg);
+  };
+}