planning

node_modules/reselect/lib/index.js

@@ -0,0 +1,155 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createSelector = void 0;
+exports.createSelectorCreator = createSelectorCreator;
+exports.createStructuredSelector = void 0;
+Object.defineProperty(exports, "defaultEqualityCheck", {
+  enumerable: true,
+  get: function get() {
+    return _defaultMemoize.defaultEqualityCheck;
+  }
+});
+Object.defineProperty(exports, "defaultMemoize", {
+  enumerable: true,
+  get: function get() {
+    return _defaultMemoize.defaultMemoize;
+  }
+});
+
+var _defaultMemoize = require("./defaultMemoize");
+
+function getDependencies(funcs) {
+  var dependencies = Array.isArray(funcs[0]) ? funcs[0] : funcs;
+
+  if (!dependencies.every(function (dep) {
+    return typeof dep === 'function';
+  })) {
+    var dependencyTypes = dependencies.map(function (dep) {
+      return typeof dep === 'function' ? "function " + (dep.name || 'unnamed') + "()" : typeof dep;
+    }).join(', ');
+    throw new Error("createSelector expects all input-selectors to be functions, but received the following types: [" + dependencyTypes + "]");
+  }
+
+  return dependencies;
+}
+
+function createSelectorCreator(memoize) {
+  for (var _len = arguments.length, memoizeOptionsFromArgs = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+    memoizeOptionsFromArgs[_key - 1] = arguments[_key];
+  }
+
+  var createSelector = function createSelector() {
+    for (var _len2 = arguments.length, funcs = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+      funcs[_key2] = arguments[_key2];
+    }
+
+    var _recomputations = 0;
+
+    var _lastResult; // Due to the intricacies of rest params, we can't do an optional arg after `...funcs`.
+    // So, start by declaring the default value here.
+    // (And yes, the words 'memoize' and 'options' appear too many times in this next sequence.)
+
+
+    var directlyPassedOptions = {
+      memoizeOptions: undefined
+    }; // Normally, the result func or "output selector" is the last arg
+
+    var resultFunc = funcs.pop(); // If the result func is actually an _object_, assume it's our options object
+
+    if (typeof resultFunc === 'object') {
+      directlyPassedOptions = resultFunc; // and pop the real result func off
+
+      resultFunc = funcs.pop();
+    }
+
+    if (typeof resultFunc !== 'function') {
+      throw new Error("createSelector expects an output function after the inputs, but received: [" + typeof resultFunc + "]");
+    } // Determine which set of options we're using. Prefer options passed directly,
+    // but fall back to options given to createSelectorCreator.
+
+
+    var _directlyPassedOption = directlyPassedOptions,
+        _directlyPassedOption2 = _directlyPassedOption.memoizeOptions,
+        memoizeOptions = _directlyPassedOption2 === void 0 ? memoizeOptionsFromArgs : _directlyPassedOption2; // Simplifying assumption: it's unlikely that the first options arg of the provided memoizer
+    // is an array. In most libs I've looked at, it's an equality function or options object.
+    // Based on that, if `memoizeOptions` _is_ an array, we assume it's a full
+    // user-provided array of options. Otherwise, it must be just the _first_ arg, and so
+    // we wrap it in an array so we can apply it.
+
+    var finalMemoizeOptions = Array.isArray(memoizeOptions) ? memoizeOptions : [memoizeOptions];
+    var dependencies = getDependencies(funcs);
+    var memoizedResultFunc = memoize.apply(void 0, [function recomputationWrapper() {
+      _recomputations++; // apply arguments instead of spreading for performance.
+
+      return resultFunc.apply(null, arguments);
+    }].concat(finalMemoizeOptions)); // If a selector is called with the exact same arguments we don't need to traverse our dependencies again.
+
+    var selector = memoize(function dependenciesChecker() {
+      var params = [];
+      var length = dependencies.length;
+
+      for (var i = 0; i < length; i++) {
+        // apply arguments instead of spreading and mutate a local list of params for performance.
+        // @ts-ignore
+        params.push(dependencies[i].apply(null, arguments));
+      } // apply arguments instead of spreading for performance.
+
+
+      _lastResult = memoizedResultFunc.apply(null, params);
+      return _lastResult;
+    });
+    Object.assign(selector, {
+      resultFunc: resultFunc,
+      memoizedResultFunc: memoizedResultFunc,
+      dependencies: dependencies,
+      lastResult: function lastResult() {
+        return _lastResult;
+      },
+      recomputations: function recomputations() {
+        return _recomputations;
+      },
+      resetRecomputations: function resetRecomputations() {
+        return _recomputations = 0;
+      }
+    });
+    return selector;
+  }; // @ts-ignore
+
+
+  return createSelector;
+}
+
+var createSelector = /* #__PURE__ */createSelectorCreator(_defaultMemoize.defaultMemoize);
+exports.createSelector = createSelector;
+
+// Manual definition of state and output arguments
+var createStructuredSelector = function createStructuredSelector(selectors, selectorCreator) {
+  if (selectorCreator === void 0) {
+    selectorCreator = createSelector;
+  }
+
+  if (typeof selectors !== 'object') {
+    throw new Error('createStructuredSelector expects first argument to be an object ' + ("where each property is a selector, instead received a " + typeof selectors));
+  }
+
+  var objectKeys = Object.keys(selectors);
+  var resultSelector = selectorCreator( // @ts-ignore
+  objectKeys.map(function (key) {
+    return selectors[key];
+  }), function () {
+    for (var _len3 = arguments.length, values = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
+      values[_key3] = arguments[_key3];
+    }
+
+    return values.reduce(function (composition, value, index) {
+      composition[objectKeys[index]] = value;
+      return composition;
+    }, {});
+  });
+  return resultSelector;
+};
+
+exports.createStructuredSelector = createStructuredSelector;