basant307/AI_Governance_Project

1var assignMergeValue = require('./_assignMergeValue'),2    cloneBuffer = require('./_cloneBuffer'),3    cloneTypedArray = require('./_cloneTypedArray'),4    copyArray = require('./_copyArray'),5    initCloneObject = require('./_initCloneObject'),6    isArguments = require('./isArguments'),7    isArray = require('./isArray'),8    isArrayLikeObject = require('./isArrayLikeObject'),9    isBuffer = require('./isBuffer'),10    isFunction = require('./isFunction'),11    isObject = require('./isObject'),12    isPlainObject = require('./isPlainObject'),13    isTypedArray = require('./isTypedArray'),14    safeGet = require('./_safeGet'),15    toPlainObject = require('./toPlainObject');16 17/**18 * A specialized version of `baseMerge` for arrays and objects which performs19 * deep merges and tracks traversed objects enabling objects with circular20 * references to be merged.21 *22 * @private23 * @param {Object} object The destination object.24 * @param {Object} source The source object.25 * @param {string} key The key of the value to merge.26 * @param {number} srcIndex The index of `source`.27 * @param {Function} mergeFunc The function to merge values.28 * @param {Function} [customizer] The function to customize assigned values.29 * @param {Object} [stack] Tracks traversed source values and their merged30 *  counterparts.31 */32function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {33  var objValue = safeGet(object, key),34      srcValue = safeGet(source, key),35      stacked = stack.get(srcValue);36 37  if (stacked) {38    assignMergeValue(object, key, stacked);39    return;40  }41  var newValue = customizer42    ? customizer(objValue, srcValue, (key + ''), object, source, stack)43    : undefined;44 45  var isCommon = newValue === undefined;46 47  if (isCommon) {48    var isArr = isArray(srcValue),49        isBuff = !isArr && isBuffer(srcValue),50        isTyped = !isArr && !isBuff && isTypedArray(srcValue);51 52    newValue = srcValue;53    if (isArr || isBuff || isTyped) {54      if (isArray(objValue)) {55        newValue = objValue;56      }57      else if (isArrayLikeObject(objValue)) {58        newValue = copyArray(objValue);59      }60      else if (isBuff) {61        isCommon = false;62        newValue = cloneBuffer(srcValue, true);63      }64      else if (isTyped) {65        isCommon = false;66        newValue = cloneTypedArray(srcValue, true);67      }68      else {69        newValue = [];70      }71    }72    else if (isPlainObject(srcValue) || isArguments(srcValue)) {73      newValue = objValue;74      if (isArguments(objValue)) {75        newValue = toPlainObject(objValue);76      }77      else if (!isObject(objValue) || isFunction(objValue)) {78        newValue = initCloneObject(srcValue);79      }80    }81    else {82      isCommon = false;83    }84  }85  if (isCommon) {86    // Recursively merge objects and arrays (susceptible to call stack limits).87    stack.set(srcValue, newValue);88    mergeFunc(newValue, srcValue, srcIndex, customizer, stack);89    stack['delete'](srcValue);90  }91  assignMergeValue(object, key, newValue);92}93 94module.exports = baseMergeDeep;95