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Filename : index.js
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'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var reselect = require('reselect');

function isStringOrNumber(value) {
  return typeof value === 'string' || typeof value === 'number';
}

var FlatObjectCache =
/*#__PURE__*/
function () {
  function FlatObjectCache() {
    this._cache = {};
  }

  var _proto = FlatObjectCache.prototype;

  _proto.set = function set(key, selectorFn) {
    this._cache[key] = selectorFn;
  };

  _proto.get = function get(key) {
    return this._cache[key];
  };

  _proto.remove = function remove(key) {
    delete this._cache[key];
  };

  _proto.clear = function clear() {
    this._cache = {};
  };

  _proto.isValidCacheKey = function isValidCacheKey(cacheKey) {
    return isStringOrNumber(cacheKey);
  };

  return FlatObjectCache;
}();

var defaultCacheCreator = FlatObjectCache;

var defaultCacheKeyValidator = function defaultCacheKeyValidator() {
  return true;
};

function createCachedSelector() {
  for (var _len = arguments.length, funcs = new Array(_len), _key = 0; _key < _len; _key++) {
    funcs[_key] = arguments[_key];
  }

  return function (polymorphicOptions, legacyOptions) {
    // @NOTE Versions 0.x/1.x accepted "options" as a function
    if (typeof legacyOptions === 'function') {
      throw new Error('[re-reselect] Second argument "options" must be an object. Please use "options.selectorCreator" to provide a custom selectorCreator.');
    }

    var options = {};

    if (typeof polymorphicOptions === 'function') {
      Object.assign(options, legacyOptions, {
        keySelector: polymorphicOptions
      }); // @TODO add legacyOptions deprecation notice in next major release
    } else {
      Object.assign(options, polymorphicOptions);
    } // https://github.com/reduxjs/reselect/blob/v4.0.0/src/index.js#L54


    var recomputations = 0;
    var resultFunc = funcs.pop();
    var dependencies = Array.isArray(funcs[0]) ? funcs[0] : [].concat(funcs);

    var resultFuncWithRecomputations = function resultFuncWithRecomputations() {
      recomputations++;
      return resultFunc.apply(void 0, arguments);
    };

    funcs.push(resultFuncWithRecomputations);
    var cache = options.cacheObject || new defaultCacheCreator();
    var selectorCreator = options.selectorCreator || reselect.createSelector;
    var isValidCacheKey = cache.isValidCacheKey || defaultCacheKeyValidator;

    if (options.keySelectorCreator) {
      options.keySelector = options.keySelectorCreator({
        keySelector: options.keySelector,
        inputSelectors: dependencies,
        resultFunc: resultFunc
      });
    } // Application receives this function


    var selector = function selector() {
      var cacheKey = options.keySelector.apply(options, arguments);

      if (isValidCacheKey(cacheKey)) {
        var cacheResponse = cache.get(cacheKey);

        if (cacheResponse === undefined) {
          cacheResponse = selectorCreator.apply(void 0, funcs);
          cache.set(cacheKey, cacheResponse);
        }

        return cacheResponse.apply(void 0, arguments);
      }

      console.warn("[re-reselect] Invalid cache key \"" + cacheKey + "\" has been returned by keySelector function.");
      return undefined;
    }; // Further selector methods


    selector.getMatchingSelector = function () {
      var cacheKey = options.keySelector.apply(options, arguments); // @NOTE It might update cache hit count in LRU-like caches

      return cache.get(cacheKey);
    };

    selector.removeMatchingSelector = function () {
      var cacheKey = options.keySelector.apply(options, arguments);
      cache.remove(cacheKey);
    };

    selector.clearCache = function () {
      cache.clear();
    };

    selector.resultFunc = resultFunc;
    selector.dependencies = dependencies;
    selector.cache = cache;

    selector.recomputations = function () {
      return recomputations;
    };

    selector.resetRecomputations = function () {
      return recomputations = 0;
    };

    selector.keySelector = options.keySelector;
    return selector;
  };
}

function createStructuredCachedSelector(selectors) {
  return reselect.createStructuredSelector(selectors, createCachedSelector);
}

function validateCacheSize(cacheSize) {
  if (cacheSize === undefined) {
    throw new Error('Missing the required property "cacheSize".');
  }

  if (!Number.isInteger(cacheSize) || cacheSize <= 0) {
    throw new Error('The "cacheSize" property must be a positive integer value.');
  }
}

var FifoObjectCache =
/*#__PURE__*/
function () {
  function FifoObjectCache(_temp) {
    var _ref = _temp === void 0 ? {} : _temp,
        cacheSize = _ref.cacheSize;

    validateCacheSize(cacheSize);
    this._cache = {};
    this._cacheOrdering = [];
    this._cacheSize = cacheSize;
  }

  var _proto = FifoObjectCache.prototype;

  _proto.set = function set(key, selectorFn) {
    this._cache[key] = selectorFn;

    this._cacheOrdering.push(key);

    if (this._cacheOrdering.length > this._cacheSize) {
      var earliest = this._cacheOrdering[0];
      this.remove(earliest);
    }
  };

  _proto.get = function get(key) {
    return this._cache[key];
  };

  _proto.remove = function remove(key) {
    var index = this._cacheOrdering.indexOf(key);

    if (index > -1) {
      this._cacheOrdering.splice(index, 1);
    }

    delete this._cache[key];
  };

  _proto.clear = function clear() {
    this._cache = {};
    this._cacheOrdering = [];
  };

  _proto.isValidCacheKey = function isValidCacheKey(cacheKey) {
    return isStringOrNumber(cacheKey);
  };

  return FifoObjectCache;
}();

var LruObjectCache =
/*#__PURE__*/
function () {
  function LruObjectCache(_temp) {
    var _ref = _temp === void 0 ? {} : _temp,
        cacheSize = _ref.cacheSize;

    validateCacheSize(cacheSize);
    this._cache = {};
    this._cacheOrdering = [];
    this._cacheSize = cacheSize;
  }

  var _proto = LruObjectCache.prototype;

  _proto.set = function set(key, selectorFn) {
    this._cache[key] = selectorFn;

    this._registerCacheHit(key);

    if (this._cacheOrdering.length > this._cacheSize) {
      var earliest = this._cacheOrdering[0];
      this.remove(earliest);
    }
  };

  _proto.get = function get(key) {
    this._registerCacheHit(key);

    return this._cache[key];
  };

  _proto.remove = function remove(key) {
    this._deleteCacheHit(key);

    delete this._cache[key];
  };

  _proto.clear = function clear() {
    this._cache = {};
    this._cacheOrdering = [];
  };

  _proto._registerCacheHit = function _registerCacheHit(key) {
    this._deleteCacheHit(key);

    this._cacheOrdering.push(key);
  };

  _proto._deleteCacheHit = function _deleteCacheHit(key) {
    var index = this._cacheOrdering.indexOf(key);

    if (index > -1) {
      this._cacheOrdering.splice(index, 1);
    }
  };

  _proto.isValidCacheKey = function isValidCacheKey(cacheKey) {
    return isStringOrNumber(cacheKey);
  };

  return LruObjectCache;
}();

var FlatMapCache =
/*#__PURE__*/
function () {
  function FlatMapCache() {
    this._cache = new Map();
  }

  var _proto = FlatMapCache.prototype;

  _proto.set = function set(key, selectorFn) {
    this._cache.set(key, selectorFn);
  };

  _proto.get = function get(key) {
    return this._cache.get(key);
  };

  _proto.remove = function remove(key) {
    this._cache["delete"](key);
  };

  _proto.clear = function clear() {
    this._cache.clear();
  };

  return FlatMapCache;
}();

var FifoMapCache =
/*#__PURE__*/
function () {
  function FifoMapCache(_temp) {
    var _ref = _temp === void 0 ? {} : _temp,
        cacheSize = _ref.cacheSize;

    validateCacheSize(cacheSize);
    this._cache = new Map();
    this._cacheSize = cacheSize;
  }

  var _proto = FifoMapCache.prototype;

  _proto.set = function set(key, selectorFn) {
    this._cache.set(key, selectorFn);

    if (this._cache.size > this._cacheSize) {
      var earliest = this._cache.keys().next().value;

      this.remove(earliest);
    }
  };

  _proto.get = function get(key) {
    return this._cache.get(key);
  };

  _proto.remove = function remove(key) {
    this._cache["delete"](key);
  };

  _proto.clear = function clear() {
    this._cache.clear();
  };

  return FifoMapCache;
}();

var LruMapCache =
/*#__PURE__*/
function () {
  function LruMapCache(_temp) {
    var _ref = _temp === void 0 ? {} : _temp,
        cacheSize = _ref.cacheSize;

    validateCacheSize(cacheSize);
    this._cache = new Map();
    this._cacheSize = cacheSize;
  }

  var _proto = LruMapCache.prototype;

  _proto.set = function set(key, selectorFn) {
    this._cache.set(key, selectorFn);

    if (this._cache.size > this._cacheSize) {
      var earliest = this._cache.keys().next().value;

      this.remove(earliest);
    }
  };

  _proto.get = function get(key) {
    var value = this._cache.get(key); // Register cache hit


    if (this._cache.has(key)) {
      this.remove(key);

      this._cache.set(key, value);
    }

    return value;
  };

  _proto.remove = function remove(key) {
    this._cache["delete"](key);
  };

  _proto.clear = function clear() {
    this._cache.clear();
  };

  return LruMapCache;
}();

exports.FifoCacheObject = FifoObjectCache;
exports.FifoMapCache = FifoMapCache;
exports.FifoObjectCache = FifoObjectCache;
exports.FlatCacheObject = FlatObjectCache;
exports.FlatMapCache = FlatMapCache;
exports.FlatObjectCache = FlatObjectCache;
exports.LruCacheObject = LruMapCache;
exports.LruMapCache = LruMapCache;
exports.LruObjectCache = LruObjectCache;
exports.createStructuredCachedSelector = createStructuredCachedSelector;
exports.default = createCachedSelector;
//# sourceMappingURL=index.js.map