lodash/internal/baseMatchesProperty.js

import baseGet from './baseGet';
import baseIsEqual from './baseIsEqual';
import baseSlice from './baseSlice';
import isArray from '../lang/isArray';
import isKey from './isKey';
import isStrictComparable from './isStrictComparable';
import last from '../array/last';
import toObject from './toObject';
import toPath from './toPath';

/**
 * The base implementation of `_.matchesProperty` which does not which does
 * not clone `value`.
 *
 * @private
 * @param {string} path The path of the property to get.
 * @param {*} value The value to compare.
 * @returns {Function} Returns the new function.
 */
function baseMatchesProperty(path, value) {
  var isArr = isArray(path),
      isCommon = isKey(path) && isStrictComparable(value),
      pathKey = (path + '');

  path = toPath(path);
  return function(object) {
    if (object == null) {
      return false;
    }
    var key = pathKey;
    object = toObject(object);
    if ((isArr || !isCommon) && !(key in object)) {
      object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
      if (object == null) {
        return false;
      }
      key = last(path);
      object = toObject(object);
    }
    return object[key] === value
      ? (value !== undefined || (key in object))
      : baseIsEqual(value, object[key], null, true);
  };
}

export default baseMatchesProperty;