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index.js
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index.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.createSelector = exports.memoize = exports.combineReducers = exports.createStoreProvider = exports.compose = exports.applyMiddleware = exports.createStore = void 0;
var _react = _interopRequireWildcard(require("react"));
function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; if (obj != null) { var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }
function _iterableToArrayLimit(arr, i) { if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === "[object Arguments]")) { return; } var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(source, true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(source).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); }
function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance"); }
function _iterableToArray(iter) { if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter); }
function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } }
var StoreContext = (0, _react.createContext)();
var createStore = function createStore(reducer, initialState, enhancer) {
var listeners = [];
var wrapReducer = function wrapReducer() {
var state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : initialState;
var action = arguments.length > 1 ? arguments[1] : undefined;
return reducer(state, action);
};
var createStore = function createStore(reducer, notUsed, enhancer) {
if (typeof enhancer === 'function') {
return enhancer(createStore)(reducer);
}
var value = reducer(undefined, {
type: "@@redux/INIT ".concat(new Date().getTime())
});
var setValue = function setValue(newValue) {
if (value === newValue) {
return;
}
value = newValue;
listeners.forEach(function (listener) {
return listener(value);
});
};
var s = {
getState: function getState() {
return value;
},
subscribe: function subscribe(listener) {
listeners.push(listener);
return function () {
return listeners = listeners.filter(function (l) {
return l !== listener;
});
};
},
dispatch: function dispatch(action) {
var newState = reducer(s.getState(), action);
setValue(newState);
}
};
return s;
};
var store = createStore(wrapReducer, undefined, enhancer);
return {
useDispatch: function useDispatch() {
return store.dispatch;
},
store: store,
useSelector: function useSelector(selector) {
var state = (0, _react.useContext)(StoreContext);
return selector(state);
}
};
};
exports.createStore = createStore;
var applyMiddleware = function applyMiddleware() {
for (var _len = arguments.length, functions = new Array(_len), _key = 0; _key < _len; _key++) {
functions[_key] = arguments[_key];
}
return function (createStore) {
return function (reducer, notUsed, enhancer) {
var store = createStore(reducer, undefined, enhancer);
var dispatch = compose.apply(void 0, _toConsumableArray(functions.map(function (fn) {
return fn(store);
})))(store.dispatch);
return _objectSpread({}, store, {
dispatch: dispatch
});
};
};
};
exports.applyMiddleware = applyMiddleware;
var compose = function compose() {
for (var _len2 = arguments.length, functions = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
functions[_key2] = arguments[_key2];
}
return functions //take out non functions
.filter(function (e) {
return typeof e === 'function';
}).reduce(function (result, fn) {
return function () {
return result(fn.apply(void 0, arguments));
};
});
};
exports.compose = compose;
var createStoreProvider = function createStoreProvider(store) {
return function (_ref) {
var children = _ref.children;
var _useState = (0, _react.useState)(store.getState()),
_useState2 = _slicedToArray(_useState, 2),
state = _useState2[0],
setState = _useState2[1];
(0, _react.useEffect)(function () {
var remove = store.subscribe(function () {
var lastState = store.getState();
Promise.resolve().then(function () {
if (lastState === store.getState()) {
setState(store.getState());
}
});
});
return function () {
return remove();
};
}, []);
return _react["default"].createElement(StoreContext.Provider, {
value: state
}, children);
};
}; //@todo: document combineReducers and test it (only rough idea of how it should work)
// https://redux.js.org/api/combinereducers#combinereducersreducers
exports.createStoreProvider = createStoreProvider;
var combineReducers = function combineReducers(reducers) {
return function combinedReducers(state, action) {
return _objectSpread({}, state, {}, Object.entries(reducers).reduce(function (result, _ref2) {
var _ref3 = _slicedToArray(_ref2, 2),
key = _ref3[0],
reducer = _ref3[1];
return _objectSpread({}, result, _defineProperty({}, key, reducer(state, action)));
}, {}));
};
}; //@todo: document and test memoize
exports.combineReducers = combineReducers;
var memoize = function memoize(fn) {
var lastResult,
lastArguments = [{}];
return function () {
for (var _len3 = arguments.length, currentArgs = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
currentArgs[_key3] = arguments[_key3];
}
var sameArgs = currentArgs.length === lastArguments.length && lastArguments.reduce(function (result, lastArg, index) {
return result && Object.is(lastArg, currentArgs[index]);
}, true);
if (sameArgs) {
return lastResult;
}
lastResult = fn.apply(null, currentArgs);
lastArguments = currentArgs;
return lastResult;
};
}; //@todo: document and test createSelector
exports.memoize = memoize;
var createSelector = function createSelector() {
for (var _len4 = arguments.length, functions = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
functions[_key4] = arguments[_key4];
}
var lastFunction = memoize(functions.pop());
return function () {
for (var _len5 = arguments.length, args = new Array(_len5), _key5 = 0; _key5 < _len5; _key5++) {
args[_key5] = arguments[_key5];
}
var argsForLastFunction = functions.map(function (fn) {
return fn.apply(null, args);
});
return lastFunction.apply(null, argsForLastFunction);
};
};
exports.createSelector = createSelector;