fuse.basic.cjs

/**
 * Fuse.js v6.6.2 - Lightweight fuzzy-search (http://fusejs.io)
 *
 * Copyright (c) 2023 Kiro Risk (http://kiro.me)
 * All Rights Reserved. Apache Software License 2.0
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 */

'use strict';

function ownKeys(object, enumerableOnly) {
  var keys = Object.keys(object);
  if (Object.getOwnPropertySymbols) {
    var symbols = Object.getOwnPropertySymbols(object);
    enumerableOnly && (symbols = symbols.filter(function (sym) {
      return Object.getOwnPropertyDescriptor(object, sym).enumerable;
    })), keys.push.apply(keys, symbols);
  }
  return keys;
}
function _objectSpread2(target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = null != arguments[i] ? arguments[i] : {};
    i % 2 ? ownKeys(Object(source), !0).forEach(function (key) {
      _defineProperty(target, key, source[key]);
    }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) {
      Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
    });
  }
  return target;
}
function _typeof(obj) {
  "@babel/helpers - typeof";

  return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
    return typeof obj;
  } : function (obj) {
    return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
  }, _typeof(obj);
}
function _classCallCheck(instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
}
function _defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
    var descriptor = props[i];
    descriptor.enumerable = descriptor.enumerable || false;
    descriptor.configurable = true;
    if ("value" in descriptor) descriptor.writable = true;
    Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor);
  }
}
function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  Object.defineProperty(Constructor, "prototype", {
    writable: false
  });
  return Constructor;
}
function _defineProperty(obj, key, value) {
  key = _toPropertyKey(key);
  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) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
}
function _arrayWithoutHoles(arr) {
  if (Array.isArray(arr)) return _arrayLikeToArray(arr);
}
function _iterableToArray(iter) {
  if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
}
function _unsupportedIterableToArray(o, minLen) {
  if (!o) return;
  if (typeof o === "string") return _arrayLikeToArray(o, minLen);
  var n = Object.prototype.toString.call(o).slice(8, -1);
  if (n === "Object" && o.constructor) n = o.constructor.name;
  if (n === "Map" || n === "Set") return Array.from(o);
  if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
}
function _arrayLikeToArray(arr, len) {
  if (len == null || len > arr.length) len = arr.length;
  for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
  return arr2;
}
function _nonIterableSpread() {
  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
function _toPrimitive(input, hint) {
  if (typeof input !== "object" || input === null) return input;
  var prim = input[Symbol.toPrimitive];
  if (prim !== undefined) {
    var res = prim.call(input, hint || "default");
    if (typeof res !== "object") return res;
    throw new TypeError("@@toPrimitive must return a primitive value.");
  }
  return (hint === "string" ? String : Number)(input);
}
function _toPropertyKey(arg) {
  var key = _toPrimitive(arg, "string");
  return typeof key === "symbol" ? key : String(key);
}

function isArray(value) {
  return !Array.isArray ? getTag(value) === '[object Array]' : Array.isArray(value);
}

// Adapted from: https://github.com/lodash/lodash/blob/master/.internal/baseToString.js
var INFINITY = 1 / 0;
function baseToString(value) {
  // Exit early for strings to avoid a performance hit in some environments.
  if (typeof value == 'string') {
    return value;
  }
  var result = value + '';
  return result == '0' && 1 / value == -INFINITY ? '-0' : result;
}
function toString(value) {
  return value == null ? '' : baseToString(value);
}
function isString(value) {
  return typeof value === 'string';
}
function isNumber(value) {
  return typeof value === 'number';
}

// Adapted from: https://github.com/lodash/lodash/blob/master/isBoolean.js
function isBoolean(value) {
  return value === true || value === false || isObjectLike(value) && getTag(value) == '[object Boolean]';
}
function isObject(value) {
  return _typeof(value) === 'object';
}

// Checks if `value` is object-like.
function isObjectLike(value) {
  return isObject(value) && value !== null;
}
function isDefined(value) {
  return value !== undefined && value !== null;
}
function isBlank(value) {
  return !value.trim().length;
}

// Gets the `toStringTag` of `value`.
// Adapted from: https://github.com/lodash/lodash/blob/master/.internal/getTag.js
function getTag(value) {
  return value == null ? value === undefined ? '[object Undefined]' : '[object Null]' : Object.prototype.toString.call(value);
}

var EXTENDED_SEARCH_UNAVAILABLE = 'Extended search is not available';
var LOGICAL_SEARCH_UNAVAILABLE = 'Logical search is not available';
var INCORRECT_INDEX_TYPE = "Incorrect 'index' type";
var LOGICAL_SEARCH_INVALID_QUERY_FOR_KEY = function LOGICAL_SEARCH_INVALID_QUERY_FOR_KEY(key) {
  return "Invalid value for key ".concat(key);
};
var PATTERN_LENGTH_TOO_LARGE = function PATTERN_LENGTH_TOO_LARGE(max) {
  return "Pattern length exceeds max of ".concat(max, ".");
};
var MISSING_KEY_PROPERTY = function MISSING_KEY_PROPERTY(name) {
  return "Missing ".concat(name, " property in key");
};
var INVALID_KEY_WEIGHT_VALUE = function INVALID_KEY_WEIGHT_VALUE(key) {
  return "Property 'weight' in key '".concat(key, "' must be a positive integer");
};

var hasOwn = Object.prototype.hasOwnProperty;
var KeyStore = /*#__PURE__*/function () {
  function KeyStore(keys) {
    var _this = this;
    _classCallCheck(this, KeyStore);
    this._keys = [];
    this._keyMap = {};
    var totalWeight = 0;
    keys.forEach(function (key) {
      var obj = createKey(key);
      _this._keys.push(obj);
      _this._keyMap[obj.id] = obj;
      totalWeight += obj.weight;
    });

    // Normalize weights so that their sum is equal to 1
    this._keys.forEach(function (key) {
      key.weight /= totalWeight;
    });
  }
  _createClass(KeyStore, [{
    key: "get",
    value: function get(keyId) {
      return this._keyMap[keyId];
    }
  }, {
    key: "keys",
    value: function keys() {
      return this._keys;
    }
  }, {
    key: "toJSON",
    value: function toJSON() {
      return JSON.stringify(this._keys);
    }
  }]);
  return KeyStore;
}();
function createKey(key) {
  var path = null;
  var id = null;
  var src = null;
  var weight = 1;
  var getFn = null;
  if (isString(key) || isArray(key)) {
    src = key;
    path = createKeyPath(key);
    id = createKeyId(key);
  } else {
    if (!hasOwn.call(key, 'name')) {
      throw new Error(MISSING_KEY_PROPERTY('name'));
    }
    var name = key.name;
    src = name;
    if (hasOwn.call(key, 'weight')) {
      weight = key.weight;
      if (weight <= 0) {
        throw new Error(INVALID_KEY_WEIGHT_VALUE(name));
      }
    }
    path = createKeyPath(name);
    id = createKeyId(name);
    getFn = key.getFn;
  }
  return {
    path: path,
    id: id,
    weight: weight,
    src: src,
    getFn: getFn
  };
}
function createKeyPath(key) {
  return isArray(key) ? key : key.split('.');
}
function createKeyId(key) {
  return isArray(key) ? key.join('.') : key;
}

function get(obj, path) {
  var list = [];
  var arr = false;
  var deepGet = function deepGet(obj, path, index) {
    if (!isDefined(obj)) {
      return;
    }
    if (!path[index]) {
      // If there's no path left, we've arrived at the object we care about.
      list.push(obj);
    } else {
      var key = path[index];
      var value = obj[key];
      if (!isDefined(value)) {
        return;
      }

      // If we're at the last value in the path, and if it's a string/number/bool,
      // add it to the list
      if (index === path.length - 1 && (isString(value) || isNumber(value) || isBoolean(value))) {
        list.push(toString(value));
      } else if (isArray(value)) {
        arr = true;
        // Search each item in the array.
        for (var i = 0, len = value.length; i < len; i += 1) {
          deepGet(value[i], path, index + 1);
        }
      } else if (path.length) {
        // An object. Recurse further.
        deepGet(value, path, index + 1);
      }
    }
  };

  // Backwards compatibility (since path used to be a string)
  deepGet(obj, isString(path) ? path.split('.') : path, 0);
  return arr ? list : list[0];
}

var MatchOptions = {
  // Whether the matches should be included in the result set. When `true`, each record in the result
  // set will include the indices of the matched characters.
  // These can consequently be used for highlighting purposes.
  includeMatches: false,
  // When `true`, the matching function will continue to the end of a search pattern even if
  // a perfect match has already been located in the string.
  findAllMatches: false,
  // Minimum number of characters that must be matched before a result is considered a match
  minMatchCharLength: 1
};
var BasicOptions = {
  // When `true`, the algorithm continues searching to the end of the input even if a perfect
  // match is found before the end of the same input.
  isCaseSensitive: false,
  // When true, the matching function will continue to the end of a search pattern even if
  includeScore: false,
  // List of properties that will be searched. This also supports nested properties.
  keys: [],
  // Whether to sort the result list, by score
  shouldSort: true,
  // Default sort function: sort by ascending score, ascending index
  sortFn: function sortFn(a, b) {
    return a.score === b.score ? a.idx < b.idx ? -1 : 1 : a.score < b.score ? -1 : 1;
  }
};
var FuzzyOptions = {
  // Approximately where in the text is the pattern expected to be found?
  location: 0,
  // At what point does the match algorithm give up. A threshold of '0.0' requires a perfect match
  // (of both letters and location), a threshold of '1.0' would match anything.
  threshold: 0.6,
  // Determines how close the match must be to the fuzzy location (specified above).
  // An exact letter match which is 'distance' characters away from the fuzzy location
  // would score as a complete mismatch. A distance of '0' requires the match be at
  // the exact location specified, a threshold of '1000' would require a perfect match
  // to be within 800 characters of the fuzzy location to be found using a 0.8 threshold.
  distance: 100
};
var AdvancedOptions = {
  // When `true`, it enables the use of unix-like search commands
  useExtendedSearch: false,
  // The get function to use when fetching an object's properties.
  // The default will search nested paths *ie foo.bar.baz*
  getFn: get,
  // When `true`, search will ignore `location` and `distance`, so it won't matter
  // where in the string the pattern appears.
  // More info: https://fusejs.io/concepts/scoring-theory.html#fuzziness-score
  ignoreLocation: false,
  // When `true`, the calculation for the relevance score (used for sorting) will
  // ignore the field-length norm.
  // More info: https://fusejs.io/concepts/scoring-theory.html#field-length-norm
  ignoreFieldNorm: false,
  // The weight to determine how much field length norm effects scoring.
  fieldNormWeight: 1
};
var Config = _objectSpread2(_objectSpread2(_objectSpread2(_objectSpread2({}, BasicOptions), MatchOptions), FuzzyOptions), AdvancedOptions);

var SPACE = /[^ ]+/g;

// Field-length norm: the shorter the field, the higher the weight.
// Set to 3 decimals to reduce index size.
function norm() {
  var weight = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 1;
  var mantissa = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 3;
  var cache = new Map();
  var m = Math.pow(10, mantissa);
  return {
    get: function get(value) {
      var numTokens = value.match(SPACE).length;
      if (cache.has(numTokens)) {
        return cache.get(numTokens);
      }

      // Default function is 1/sqrt(x), weight makes that variable
      var norm = 1 / Math.pow(numTokens, 0.5 * weight);

      // In place of `toFixed(mantissa)`, for faster computation
      var n = parseFloat(Math.round(norm * m) / m);
      cache.set(numTokens, n);
      return n;
    },
    clear: function clear() {
      cache.clear();
    }
  };
}

var FuseIndex = /*#__PURE__*/function () {
  function FuseIndex() {
    var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
      _ref$getFn = _ref.getFn,
      getFn = _ref$getFn === void 0 ? Config.getFn : _ref$getFn,
      _ref$fieldNormWeight = _ref.fieldNormWeight,
      fieldNormWeight = _ref$fieldNormWeight === void 0 ? Config.fieldNormWeight : _ref$fieldNormWeight;
    _classCallCheck(this, FuseIndex);
    this.norm = norm(fieldNormWeight, 3);
    this.getFn = getFn;
    this.isCreated = false;
    this.setIndexRecords();
  }
  _createClass(FuseIndex, [{
    key: "setSources",
    value: function setSources() {
      var docs = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      this.docs = docs;
    }
  }, {
    key: "setIndexRecords",
    value: function setIndexRecords() {
      var records = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      this.records = records;
    }
  }, {
    key: "setKeys",
    value: function setKeys() {
      var _this = this;
      var keys = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      this.keys = keys;
      this._keysMap = {};
      keys.forEach(function (key, idx) {
        _this._keysMap[key.id] = idx;
      });
    }
  }, {
    key: "create",
    value: function create() {
      var _this2 = this;
      if (this.isCreated || !this.docs.length) {
        return;
      }
      this.isCreated = true;

      // List is Array<String>
      if (isString(this.docs[0])) {
        this.docs.forEach(function (doc, docIndex) {
          _this2._addString(doc, docIndex);
        });
      } else {
        // List is Array<Object>
        this.docs.forEach(function (doc, docIndex) {
          _this2._addObject(doc, docIndex);
        });
      }
      this.norm.clear();
    }
    // Adds a doc to the end of the index
  }, {
    key: "add",
    value: function add(doc) {
      var idx = this.size();
      if (isString(doc)) {
        this._addString(doc, idx);
      } else {
        this._addObject(doc, idx);
      }
    }
    // Removes the doc at the specified index of the index
  }, {
    key: "removeAt",
    value: function removeAt(idx) {
      this.records.splice(idx, 1);

      // Change ref index of every subsquent doc
      for (var i = idx, len = this.size(); i < len; i += 1) {
        this.records[i].i -= 1;
      }
    }
  }, {
    key: "getValueForItemAtKeyId",
    value: function getValueForItemAtKeyId(item, keyId) {
      return item[this._keysMap[keyId]];
    }
  }, {
    key: "size",
    value: function size() {
      return this.records.length;
    }
  }, {
    key: "_addString",
    value: function _addString(doc, docIndex) {
      if (!isDefined(doc) || isBlank(doc)) {
        return;
      }
      var record = {
        v: doc,
        i: docIndex,
        n: this.norm.get(doc)
      };
      this.records.push(record);
    }
  }, {
    key: "_addObject",
    value: function _addObject(doc, docIndex) {
      var _this3 = this;
      var record = {
        i: docIndex,
        $: {}
      };

      // Iterate over every key (i.e, path), and fetch the value at that key
      this.keys.forEach(function (key, keyIndex) {
        var value = key.getFn ? key.getFn(doc) : _this3.getFn(doc, key.path);
        if (!isDefined(value)) {
          return;
        }
        if (isArray(value)) {
          var subRecords = [];
          var stack = [{
            nestedArrIndex: -1,
            value: value
          }];
          while (stack.length) {
            var _stack$pop = stack.pop(),
              nestedArrIndex = _stack$pop.nestedArrIndex,
              _value = _stack$pop.value;
            if (!isDefined(_value)) {
              continue;
            }
            if (isString(_value) && !isBlank(_value)) {
              var subRecord = {
                v: _value,
                i: nestedArrIndex,
                n: _this3.norm.get(_value)
              };
              subRecords.push(subRecord);
            } else if (isArray(_value)) {
              _value.forEach(function (item, k) {
                stack.push({
                  nestedArrIndex: k,
                  value: item
                });
              });
            } else ;
          }
          record.$[keyIndex] = subRecords;
        } else if (isString(value) && !isBlank(value)) {
          var _subRecord = {
            v: value,
            n: _this3.norm.get(value)
          };
          record.$[keyIndex] = _subRecord;
        }
      });
      this.records.push(record);
    }
  }, {
    key: "toJSON",
    value: function toJSON() {
      return {
        keys: this.keys,
        records: this.records
      };
    }
  }]);
  return FuseIndex;
}();
function createIndex(keys, docs) {
  var _ref2 = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
    _ref2$getFn = _ref2.getFn,
    getFn = _ref2$getFn === void 0 ? Config.getFn : _ref2$getFn,
    _ref2$fieldNormWeight = _ref2.fieldNormWeight,
    fieldNormWeight = _ref2$fieldNormWeight === void 0 ? Config.fieldNormWeight : _ref2$fieldNormWeight;
  var myIndex = new FuseIndex({
    getFn: getFn,
    fieldNormWeight: fieldNormWeight
  });
  myIndex.setKeys(keys.map(createKey));
  myIndex.setSources(docs);
  myIndex.create();
  return myIndex;
}
function parseIndex(data) {
  var _ref3 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
    _ref3$getFn = _ref3.getFn,
    getFn = _ref3$getFn === void 0 ? Config.getFn : _ref3$getFn,
    _ref3$fieldNormWeight = _ref3.fieldNormWeight,
    fieldNormWeight = _ref3$fieldNormWeight === void 0 ? Config.fieldNormWeight : _ref3$fieldNormWeight;
  var keys = data.keys,
    records = data.records;
  var myIndex = new FuseIndex({
    getFn: getFn,
    fieldNormWeight: fieldNormWeight
  });
  myIndex.setKeys(keys);
  myIndex.setIndexRecords(records);
  return myIndex;
}

function computeScore$1(pattern) {
  var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
    _ref$errors = _ref.errors,
    errors = _ref$errors === void 0 ? 0 : _ref$errors,
    _ref$currentLocation = _ref.currentLocation,
    currentLocation = _ref$currentLocation === void 0 ? 0 : _ref$currentLocation,
    _ref$expectedLocation = _ref.expectedLocation,
    expectedLocation = _ref$expectedLocation === void 0 ? 0 : _ref$expectedLocation,
    _ref$distance = _ref.distance,
    distance = _ref$distance === void 0 ? Config.distance : _ref$distance,
    _ref$ignoreLocation = _ref.ignoreLocation,
    ignoreLocation = _ref$ignoreLocation === void 0 ? Config.ignoreLocation : _ref$ignoreLocation;
  var accuracy = errors / pattern.length;
  if (ignoreLocation) {
    return accuracy;
  }
  var proximity = Math.abs(expectedLocation - currentLocation);
  if (!distance) {
    // Dodge divide by zero error.
    return proximity ? 1.0 : accuracy;
  }
  return accuracy + proximity / distance;
}

function convertMaskToIndices() {
  var matchmask = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
  var minMatchCharLength = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Config.minMatchCharLength;
  var indices = [];
  var start = -1;
  var end = -1;
  var i = 0;
  for (var len = matchmask.length; i < len; i += 1) {
    var match = matchmask[i];
    if (match && start === -1) {
      start = i;
    } else if (!match && start !== -1) {
      end = i - 1;
      if (end - start + 1 >= minMatchCharLength) {
        indices.push([start, end]);
      }
      start = -1;
    }
  }

  // (i-1 - start) + 1 => i - start
  if (matchmask[i - 1] && i - start >= minMatchCharLength) {
    indices.push([start, i - 1]);
  }
  return indices;
}

// Machine word size
var MAX_BITS = 32;

function search(text, pattern, patternAlphabet) {
  var _ref = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {},
    _ref$location = _ref.location,
    location = _ref$location === void 0 ? Config.location : _ref$location,
    _ref$distance = _ref.distance,
    distance = _ref$distance === void 0 ? Config.distance : _ref$distance,
    _ref$threshold = _ref.threshold,
    threshold = _ref$threshold === void 0 ? Config.threshold : _ref$threshold,
    _ref$findAllMatches = _ref.findAllMatches,
    findAllMatches = _ref$findAllMatches === void 0 ? Config.findAllMatches : _ref$findAllMatches,
    _ref$minMatchCharLeng = _ref.minMatchCharLength,
    minMatchCharLength = _ref$minMatchCharLeng === void 0 ? Config.minMatchCharLength : _ref$minMatchCharLeng,
    _ref$includeMatches = _ref.includeMatches,
    includeMatches = _ref$includeMatches === void 0 ? Config.includeMatches : _ref$includeMatches,
    _ref$ignoreLocation = _ref.ignoreLocation,
    ignoreLocation = _ref$ignoreLocation === void 0 ? Config.ignoreLocation : _ref$ignoreLocation;
  if (pattern.length > MAX_BITS) {
    throw new Error(PATTERN_LENGTH_TOO_LARGE(MAX_BITS));
  }
  var patternLen = pattern.length;
  // Set starting location at beginning text and initialize the alphabet.
  var textLen = text.length;
  // Handle the case when location > text.length
  var expectedLocation = Math.max(0, Math.min(location, textLen));
  // Highest score beyond which we give up.
  var currentThreshold = threshold;
  // Is there a nearby exact match? (speedup)
  var bestLocation = expectedLocation;

  // Performance: only computer matches when the minMatchCharLength > 1
  // OR if `includeMatches` is true.
  var computeMatches = minMatchCharLength > 1 || includeMatches;
  // A mask of the matches, used for building the indices
  var matchMask = computeMatches ? Array(textLen) : [];
  var index;

  // Get all exact matches, here for speed up
  while ((index = text.indexOf(pattern, bestLocation)) > -1) {
    var score = computeScore$1(pattern, {
      currentLocation: index,
      expectedLocation: expectedLocation,
      distance: distance,
      ignoreLocation: ignoreLocation
    });
    currentThreshold = Math.min(score, currentThreshold);
    bestLocation = index + patternLen;
    if (computeMatches) {
      var i = 0;
      while (i < patternLen) {
        matchMask[index + i] = 1;
        i += 1;
      }
    }
  }

  // Reset the best location
  bestLocation = -1;
  var lastBitArr = [];
  var finalScore = 1;
  var binMax = patternLen + textLen;
  var mask = 1 << patternLen - 1;
  for (var _i = 0; _i < patternLen; _i += 1) {
    // Scan for the best match; each iteration allows for one more error.
    // Run a binary search to determine how far from the match location we can stray
    // at this error level.
    var binMin = 0;
    var binMid = binMax;
    while (binMin < binMid) {
      var _score = computeScore$1(pattern, {
        errors: _i,
        currentLocation: expectedLocation + binMid,
        expectedLocation: expectedLocation,
        distance: distance,
        ignoreLocation: ignoreLocation
      });
      if (_score <= currentThreshold) {
        binMin = binMid;
      } else {
        binMax = binMid;
      }
      binMid = Math.floor((binMax - binMin) / 2 + binMin);
    }

    // Use the result from this iteration as the maximum for the next.
    binMax = binMid;
    var start = Math.max(1, expectedLocation - binMid + 1);
    var finish = findAllMatches ? textLen : Math.min(expectedLocation + binMid, textLen) + patternLen;

    // Initialize the bit array
    var bitArr = Array(finish + 2);
    bitArr[finish + 1] = (1 << _i) - 1;
    for (var j = finish; j >= start; j -= 1) {
      var currentLocation = j - 1;
      var charMatch = patternAlphabet[text.charAt(currentLocation)];
      if (computeMatches) {
        // Speed up: quick bool to int conversion (i.e, `charMatch ? 1 : 0`)
        matchMask[currentLocation] = +!!charMatch;
      }

      // First pass: exact match
      bitArr[j] = (bitArr[j + 1] << 1 | 1) & charMatch;

      // Subsequent passes: fuzzy match
      if (_i) {
        bitArr[j] |= (lastBitArr[j + 1] | lastBitArr[j]) << 1 | 1 | lastBitArr[j + 1];
      }
      if (bitArr[j] & mask) {
        finalScore = computeScore$1(pattern, {
          errors: _i,
          currentLocation: currentLocation,
          expectedLocation: expectedLocation,
          distance: distance,
          ignoreLocation: ignoreLocation
        });

        // This match will almost certainly be better than any existing match.
        // But check anyway.
        if (finalScore <= currentThreshold) {
          // Indeed it is
          currentThreshold = finalScore;
          bestLocation = currentLocation;

          // Already passed `loc`, downhill from here on in.
          if (bestLocation <= expectedLocation) {
            break;
          }

          // When passing `bestLocation`, don't exceed our current distance from `expectedLocation`.
          start = Math.max(1, 2 * expectedLocation - bestLocation);
        }
      }
    }

    // No hope for a (better) match at greater error levels.
    var _score2 = computeScore$1(pattern, {
      errors: _i + 1,
      currentLocation: expectedLocation,
      expectedLocation: expectedLocation,
      distance: distance,
      ignoreLocation: ignoreLocation
    });
    if (_score2 > currentThreshold) {
      break;
    }
    lastBitArr = bitArr;
  }
  var result = {
    isMatch: bestLocation >= 0,
    // Count exact matches (those with a score of 0) to be "almost" exact
    score: Math.max(0.001, finalScore)
  };
  if (computeMatches) {
    var indices = convertMaskToIndices(matchMask, minMatchCharLength);
    if (!indices.length) {
      result.isMatch = false;
    } else if (includeMatches) {
      result.indices = indices;
    }
  }
  return result;
}

function createPatternAlphabet(pattern) {
  var mask = {};
  for (var i = 0, len = pattern.length; i < len; i += 1) {
    var _char = pattern.charAt(i);
    mask[_char] = (mask[_char] || 0) | 1 << len - i - 1;
  }
  return mask;
}

var BitapSearch = /*#__PURE__*/function () {
  function BitapSearch(pattern) {
    var _this = this;
    var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
      _ref$location = _ref.location,
      location = _ref$location === void 0 ? Config.location : _ref$location,
      _ref$threshold = _ref.threshold,
      threshold = _ref$threshold === void 0 ? Config.threshold : _ref$threshold,
      _ref$distance = _ref.distance,
      distance = _ref$distance === void 0 ? Config.distance : _ref$distance,
      _ref$includeMatches = _ref.includeMatches,
      includeMatches = _ref$includeMatches === void 0 ? Config.includeMatches : _ref$includeMatches,
      _ref$findAllMatches = _ref.findAllMatches,
      findAllMatches = _ref$findAllMatches === void 0 ? Config.findAllMatches : _ref$findAllMatches,
      _ref$minMatchCharLeng = _ref.minMatchCharLength,
      minMatchCharLength = _ref$minMatchCharLeng === void 0 ? Config.minMatchCharLength : _ref$minMatchCharLeng,
      _ref$isCaseSensitive = _ref.isCaseSensitive,
      isCaseSensitive = _ref$isCaseSensitive === void 0 ? Config.isCaseSensitive : _ref$isCaseSensitive,
      _ref$ignoreLocation = _ref.ignoreLocation,
      ignoreLocation = _ref$ignoreLocation === void 0 ? Config.ignoreLocation : _ref$ignoreLocation;
    _classCallCheck(this, BitapSearch);
    this.options = {
      location: location,
      threshold: threshold,
      distance: distance,
      includeMatches: includeMatches,
      findAllMatches: findAllMatches,
      minMatchCharLength: minMatchCharLength,
      isCaseSensitive: isCaseSensitive,
      ignoreLocation: ignoreLocation
    };
    this.pattern = isCaseSensitive ? pattern : pattern.toLowerCase();
    this.chunks = [];
    if (!this.pattern.length) {
      return;
    }
    var addChunk = function addChunk(pattern, startIndex) {
      _this.chunks.push({
        pattern: pattern,
        alphabet: createPatternAlphabet(pattern),
        startIndex: startIndex
      });
    };
    var len = this.pattern.length;
    if (len > MAX_BITS) {
      var i = 0;
      var remainder = len % MAX_BITS;
      var end = len - remainder;
      while (i < end) {
        addChunk(this.pattern.substr(i, MAX_BITS), i);
        i += MAX_BITS;
      }
      if (remainder) {
        var startIndex = len - MAX_BITS;
        addChunk(this.pattern.substr(startIndex), startIndex);
      }
    } else {
      addChunk(this.pattern, 0);
    }
  }
  _createClass(BitapSearch, [{
    key: "searchIn",
    value: function searchIn(text) {
      var _this$options = this.options,
        isCaseSensitive = _this$options.isCaseSensitive,
        includeMatches = _this$options.includeMatches;
      if (!isCaseSensitive) {
        text = text.toLowerCase();
      }

      // Exact match
      if (this.pattern === text) {
        var _result = {
          isMatch: true,
          score: 0
        };
        if (includeMatches) {
          _result.indices = [[0, text.length - 1]];
        }
        return _result;
      }

      // Otherwise, use Bitap algorithm
      var _this$options2 = this.options,
        location = _this$options2.location,
        distance = _this$options2.distance,
        threshold = _this$options2.threshold,
        findAllMatches = _this$options2.findAllMatches,
        minMatchCharLength = _this$options2.minMatchCharLength,
        ignoreLocation = _this$options2.ignoreLocation;
      var allIndices = [];
      var totalScore = 0;
      var hasMatches = false;
      this.chunks.forEach(function (_ref2) {
        var pattern = _ref2.pattern,
          alphabet = _ref2.alphabet,
          startIndex = _ref2.startIndex;
        var _search = search(text, pattern, alphabet, {
            location: location + startIndex,
            distance: distance,
            threshold: threshold,
            findAllMatches: findAllMatches,
            minMatchCharLength: minMatchCharLength,
            includeMatches: includeMatches,
            ignoreLocation: ignoreLocation
          }),
          isMatch = _search.isMatch,
          score = _search.score,
          indices = _search.indices;
        if (isMatch) {
          hasMatches = true;
        }
        totalScore += score;
        if (isMatch && indices) {
          allIndices = [].concat(_toConsumableArray(allIndices), _toConsumableArray(indices));
        }
      });
      var result = {
        isMatch: hasMatches,
        score: hasMatches ? totalScore / this.chunks.length : 1
      };
      if (hasMatches && includeMatches) {
        result.indices = allIndices;
      }
      return result;
    }
  }]);
  return BitapSearch;
}();

var registeredSearchers = [];
function createSearcher(pattern, options) {
  for (var i = 0, len = registeredSearchers.length; i < len; i += 1) {
    var searcherClass = registeredSearchers[i];
    if (searcherClass.condition(pattern, options)) {
      return new searcherClass(pattern, options);
    }
  }
  return new BitapSearch(pattern, options);
}

var LogicalOperator = {
  AND: '$and',
  OR: '$or'
};
var KeyType = {
  PATH: '$path',
  PATTERN: '$val'
};
var isExpression = function isExpression(query) {
  return !!(query[LogicalOperator.AND] || query[LogicalOperator.OR]);
};
var isPath = function isPath(query) {
  return !!query[KeyType.PATH];
};
var isLeaf = function isLeaf(query) {
  return !isArray(query) && isObject(query) && !isExpression(query);
};
var convertToExplicit = function convertToExplicit(query) {
  return _defineProperty({}, LogicalOperator.AND, Object.keys(query).map(function (key) {
    return _defineProperty({}, key, query[key]);
  }));
};

// When `auto` is `true`, the parse function will infer and initialize and add
// the appropriate `Searcher` instance
function parse(query, options) {
  var _ref3 = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
    _ref3$auto = _ref3.auto,
    auto = _ref3$auto === void 0 ? true : _ref3$auto;
  var next = function next(query) {
    var keys = Object.keys(query);
    var isQueryPath = isPath(query);
    if (!isQueryPath && keys.length > 1 && !isExpression(query)) {
      return next(convertToExplicit(query));
    }
    if (isLeaf(query)) {
      var key = isQueryPath ? query[KeyType.PATH] : keys[0];
      var pattern = isQueryPath ? query[KeyType.PATTERN] : query[key];
      if (!isString(pattern)) {
        throw new Error(LOGICAL_SEARCH_INVALID_QUERY_FOR_KEY(key));
      }
      var obj = {
        keyId: createKeyId(key),
        pattern: pattern
      };
      if (auto) {
        obj.searcher = createSearcher(pattern, options);
      }
      return obj;
    }
    var node = {
      children: [],
      operator: keys[0]
    };
    keys.forEach(function (key) {
      var value = query[key];
      if (isArray(value)) {
        value.forEach(function (item) {
          node.children.push(next(item));
        });
      }
    });
    return node;
  };
  if (!isExpression(query)) {
    query = convertToExplicit(query);
  }
  return next(query);
}

// Practical scoring function
function computeScore(results, _ref) {
  var _ref$ignoreFieldNorm = _ref.ignoreFieldNorm,
    ignoreFieldNorm = _ref$ignoreFieldNorm === void 0 ? Config.ignoreFieldNorm : _ref$ignoreFieldNorm;
  results.forEach(function (result) {
    var totalScore = 1;
    result.matches.forEach(function (_ref2) {
      var key = _ref2.key,
        norm = _ref2.norm,
        score = _ref2.score;
      var weight = key ? key.weight : null;
      totalScore *= Math.pow(score === 0 && weight ? Number.EPSILON : score, (weight || 1) * (ignoreFieldNorm ? 1 : norm));
    });
    result.score = totalScore;
  });
}

function transformMatches(result, data) {
  var matches = result.matches;
  data.matches = [];
  if (!isDefined(matches)) {
    return;
  }
  matches.forEach(function (match) {
    if (!isDefined(match.indices) || !match.indices.length) {
      return;
    }
    var indices = match.indices,
      value = match.value;
    var obj = {
      indices: indices,
      value: value
    };
    if (match.key) {
      obj.key = match.key.src;
    }
    if (match.idx > -1) {
      obj.refIndex = match.idx;
    }
    data.matches.push(obj);
  });
}

function transformScore(result, data) {
  data.score = result.score;
}

function format(results, docs) {
  var _ref = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
    _ref$includeMatches = _ref.includeMatches,
    includeMatches = _ref$includeMatches === void 0 ? Config.includeMatches : _ref$includeMatches,
    _ref$includeScore = _ref.includeScore,
    includeScore = _ref$includeScore === void 0 ? Config.includeScore : _ref$includeScore;
  var transformers = [];
  if (includeMatches) transformers.push(transformMatches);
  if (includeScore) transformers.push(transformScore);
  return results.map(function (result) {
    var idx = result.idx;
    var data = {
      item: docs[idx],
      refIndex: idx
    };
    if (transformers.length) {
      transformers.forEach(function (transformer) {
        transformer(result, data);
      });
    }
    return data;
  });
}

var Fuse$1 = /*#__PURE__*/function () {
  function Fuse(docs) {
    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    var index = arguments.length > 2 ? arguments[2] : undefined;
    _classCallCheck(this, Fuse);
    this.options = _objectSpread2(_objectSpread2({}, Config), options);
    if (this.options.useExtendedSearch && !false) {
      throw new Error(EXTENDED_SEARCH_UNAVAILABLE);
    }
    this._keyStore = new KeyStore(this.options.keys);
    this.setCollection(docs, index);
  }
  _createClass(Fuse, [{
    key: "setCollection",
    value: function setCollection(docs, index) {
      this._docs = docs;
      if (index && !(index instanceof FuseIndex)) {
        throw new Error(INCORRECT_INDEX_TYPE);
      }
      this._myIndex = index || createIndex(this.options.keys, this._docs, {
        getFn: this.options.getFn,
        fieldNormWeight: this.options.fieldNormWeight
      });
    }
  }, {
    key: "add",
    value: function add(doc) {
      if (!isDefined(doc)) {
        return;
      }
      this._docs.push(doc);
      this._myIndex.add(doc);
    }
  }, {
    key: "remove",
    value: function remove() {
      var predicate = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : function /* doc, idx */ () {
        return false;
      };
      var results = [];
      for (var i = 0, len = this._docs.length; i < len; i += 1) {
        var doc = this._docs[i];
        if (predicate(doc, i)) {
          this.removeAt(i);
          i -= 1;
          len -= 1;
          results.push(doc);
        }
      }
      return results;
    }
  }, {
    key: "removeAt",
    value: function removeAt(idx) {
      this._docs.splice(idx, 1);
      this._myIndex.removeAt(idx);
    }
  }, {
    key: "getIndex",
    value: function getIndex() {
      return this._myIndex;
    }
  }, {
    key: "search",
    value: function search(query) {
      var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
        _ref$limit = _ref.limit,
        limit = _ref$limit === void 0 ? -1 : _ref$limit;
      var _this$options = this.options,
        includeMatches = _this$options.includeMatches,
        includeScore = _this$options.includeScore,
        shouldSort = _this$options.shouldSort,
        sortFn = _this$options.sortFn,
        ignoreFieldNorm = _this$options.ignoreFieldNorm;
      var results = isString(query) ? isString(this._docs[0]) ? this._searchStringList(query) : this._searchObjectList(query) : this._searchLogical(query);
      computeScore(results, {
        ignoreFieldNorm: ignoreFieldNorm
      });
      if (shouldSort) {
        results.sort(sortFn);
      }
      if (isNumber(limit) && limit > -1) {
        results = results.slice(0, limit);
      }
      return format(results, this._docs, {
        includeMatches: includeMatches,
        includeScore: includeScore
      });
    }
  }, {
    key: "_searchStringList",
    value: function _searchStringList(query) {
      var searcher = createSearcher(query, this.options);
      var records = this._myIndex.records;
      var results = [];

      // Iterate over every string in the index
      records.forEach(function (_ref2) {
        var text = _ref2.v,
          idx = _ref2.i,
          norm = _ref2.n;
        if (!isDefined(text)) {
          return;
        }
        var _searcher$searchIn = searcher.searchIn(text),
          isMatch = _searcher$searchIn.isMatch,
          score = _searcher$searchIn.score,
          indices = _searcher$searchIn.indices;
        if (isMatch) {
          results.push({
            item: text,
            idx: idx,
            matches: [{
              score: score,
              value: text,
              norm: norm,
              indices: indices
            }]
          });
        }
      });
      return results;
    }
  }, {
    key: "_searchLogical",
    value: function _searchLogical(query) {
      {
        throw new Error(LOGICAL_SEARCH_UNAVAILABLE);
      }
    }
  }, {
    key: "_searchObjectList",
    value: function _searchObjectList(query) {
      var _this2 = this;
      var searcher = createSearcher(query, this.options);
      var _this$_myIndex = this._myIndex,
        keys = _this$_myIndex.keys,
        records = _this$_myIndex.records;
      var results = [];

      // List is Array<Object>
      records.forEach(function (_ref5) {
        var item = _ref5.$,
          idx = _ref5.i;
        if (!isDefined(item)) {
          return;
        }
        var matches = [];

        // Iterate over every key (i.e, path), and fetch the value at that key
        keys.forEach(function (key, keyIndex) {
          matches.push.apply(matches, _toConsumableArray(_this2._findMatches({
            key: key,
            value: item[keyIndex],
            searcher: searcher
          })));
        });
        if (matches.length) {
          results.push({
            idx: idx,
            item: item,
            matches: matches
          });
        }
      });
      return results;
    }
  }, {
    key: "_findMatches",
    value: function _findMatches(_ref6) {
      var key = _ref6.key,
        value = _ref6.value,
        searcher = _ref6.searcher;
      if (!isDefined(value)) {
        return [];
      }
      var matches = [];
      if (isArray(value)) {
        value.forEach(function (_ref7) {
          var text = _ref7.v,
            idx = _ref7.i,
            norm = _ref7.n;
          if (!isDefined(text)) {
            return;
          }
          var _searcher$searchIn2 = searcher.searchIn(text),
            isMatch = _searcher$searchIn2.isMatch,
            score = _searcher$searchIn2.score,
            indices = _searcher$searchIn2.indices;
          if (isMatch) {
            matches.push({
              score: score,
              key: key,
              value: text,
              idx: idx,
              norm: norm,
              indices: indices
            });
          }
        });
      } else {
        var text = value.v,
          norm = value.n;
        var _searcher$searchIn3 = searcher.searchIn(text),
          isMatch = _searcher$searchIn3.isMatch,
          score = _searcher$searchIn3.score,
          indices = _searcher$searchIn3.indices;
        if (isMatch) {
          matches.push({
            score: score,
            key: key,
            value: text,
            norm: norm,
            indices: indices
          });
        }
      }
      return matches;
    }
  }]);
  return Fuse;
}();

Fuse$1.version = '6.6.2';
Fuse$1.createIndex = createIndex;
Fuse$1.parseIndex = parseIndex;
Fuse$1.config = Config;
{
  Fuse$1.parseQuery = parse;
}
var Fuse = Fuse$1;

module.exports = Fuse;