json2csv
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Convert JSON to CSV
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JavaScript
'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
var stream = _interopDefault(require('stream'));
var os = _interopDefault(require('os'));
function _typeof(obj) {
if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
_typeof = function (obj) {
return typeof obj;
};
} else {
_typeof = function (obj) {
return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};
}
return _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, descriptor.key, descriptor);
}
}
function _createClass(Constructor, protoProps, staticProps) {
if (protoProps) _defineProperties(Constructor.prototype, protoProps);
if (staticProps) _defineProperties(Constructor, staticProps);
return Constructor;
}
function _defineProperty(obj, key, value) {
if (key in obj) {
Object.defineProperty(obj, key, {
value: value,
enumerable: true,
configurable: true,
writable: true
});
} else {
obj[key] = value;
}
return obj;
}
function _inherits(subClass, superClass) {
if (typeof superClass !== "function" && superClass !== null) {
throw new TypeError("Super expression must either be null or a function");
}
subClass.prototype = Object.create(superClass && superClass.prototype, {
constructor: {
value: subClass,
writable: true,
configurable: true
}
});
if (superClass) _setPrototypeOf(subClass, superClass);
}
function _getPrototypeOf(o) {
_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
return o.__proto__ || Object.getPrototypeOf(o);
};
return _getPrototypeOf(o);
}
function _setPrototypeOf(o, p) {
_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
o.__proto__ = p;
return o;
};
return _setPrototypeOf(o, p);
}
function _assertThisInitialized(self) {
if (self === void 0) {
throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
}
return self;
}
function _possibleConstructorReturn(self, call) {
if (call && (typeof call === "object" || typeof call === "function")) {
return call;
}
return _assertThisInitialized(self);
}
function _toConsumableArray(arr) {
return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread();
}
function _arrayWithoutHoles(arr) {
if (Array.isArray(arr)) {
for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
return arr2;
}
}
function _iterableToArray(iter) {
if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter);
}
function _nonIterableSpread() {
throw new TypeError("Invalid attempt to spread non-iterable instance");
}
var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
/**
* lodash (Custom Build) <https://lodash.com/>
* Build: `lodash modularize exports="npm" -o ./`
* Copyright jQuery Foundation and other contributors <https://jquery.org/>
* Released under MIT license <https://lodash.com/license>
* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
*/
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT = 'Expected a function';
/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED = '__lodash_hash_undefined__';
/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0;
/** `Object#toString` result references. */
var funcTag = '[object Function]',
genTag = '[object GeneratorFunction]',
symbolTag = '[object Symbol]';
/** Used to match property names within property paths. */
var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
reIsPlainProp = /^\w*$/,
reLeadingDot = /^\./,
rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
/**
* Used to match `RegExp`
* [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
*/
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
/** Used to match backslashes in property paths. */
var reEscapeChar = /\\(\\)?/g;
/** Used to detect host constructors (Safari). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;
/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;
/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
/** Used as a reference to the global object. */
var root = freeGlobal || freeSelf || Function('return this')();
/**
* Gets the value at `key` of `object`.
*
* @private
* @param {Object} [object] The object to query.
* @param {string} key The key of the property to get.
* @returns {*} Returns the property value.
*/
function getValue(object, key) {
return object == null ? undefined : object[key];
}
/**
* Checks if `value` is a host object in IE < 9.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a host object, else `false`.
*/
function isHostObject(value) {
// Many host objects are `Object` objects that can coerce to strings
// despite having improperly defined `toString` methods.
var result = false;
if (value != null && typeof value.toString != 'function') {
try {
result = !!(value + '');
} catch (e) {}
}
return result;
}
/** Used for built-in method references. */
var arrayProto = Array.prototype,
funcProto = Function.prototype,
objectProto = Object.prototype;
/** Used to detect overreaching core-js shims. */
var coreJsData = root['__core-js_shared__'];
/** Used to detect methods masquerading as native. */
var maskSrcKey = (function() {
var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
return uid ? ('Symbol(src)_1.' + uid) : '';
}());
/** Used to resolve the decompiled source of functions. */
var funcToString = funcProto.toString;
/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;
/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
* of values.
*/
var objectToString = objectProto.toString;
/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);
/** Built-in value references. */
var Symbol$1 = root.Symbol,
splice = arrayProto.splice;
/* Built-in method references that are verified to be native. */
var Map = getNative(root, 'Map'),
nativeCreate = getNative(Object, 'create');
/** Used to convert symbols to primitives and strings. */
var symbolProto = Symbol$1 ? Symbol$1.prototype : undefined,
symbolToString = symbolProto ? symbolProto.toString : undefined;
/**
* Creates a hash object.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function Hash(entries) {
var index = -1,
length = entries ? entries.length : 0;
this.clear();
while (++index < length) {
var entry = entries[index];
this.set(entry[0], entry[1]);
}
}
/**
* Removes all key-value entries from the hash.
*
* @private
* @name clear
* @memberOf Hash
*/
function hashClear() {
this.__data__ = nativeCreate ? nativeCreate(null) : {};
}
/**
* Removes `key` and its value from the hash.
*
* @private
* @name delete
* @memberOf Hash
* @param {Object} hash The hash to modify.
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function hashDelete(key) {
return this.has(key) && delete this.__data__[key];
}
/**
* Gets the hash value for `key`.
*
* @private
* @name get
* @memberOf Hash
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function hashGet(key) {
var data = this.__data__;
if (nativeCreate) {
var result = data[key];
return result === HASH_UNDEFINED ? undefined : result;
}
return hasOwnProperty.call(data, key) ? data[key] : undefined;
}
/**
* Checks if a hash value for `key` exists.
*
* @private
* @name has
* @memberOf Hash
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function hashHas(key) {
var data = this.__data__;
return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
}
/**
* Sets the hash `key` to `value`.
*
* @private
* @name set
* @memberOf Hash
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the hash instance.
*/
function hashSet(key, value) {
var data = this.__data__;
data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
return this;
}
// Add methods to `Hash`.
Hash.prototype.clear = hashClear;
Hash.prototype['delete'] = hashDelete;
Hash.prototype.get = hashGet;
Hash.prototype.has = hashHas;
Hash.prototype.set = hashSet;
/**
* Creates an list cache object.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function ListCache(entries) {
var index = -1,
length = entries ? entries.length : 0;
this.clear();
while (++index < length) {
var entry = entries[index];
this.set(entry[0], entry[1]);
}
}
/**
* Removes all key-value entries from the list cache.
*
* @private
* @name clear
* @memberOf ListCache
*/
function listCacheClear() {
this.__data__ = [];
}
/**
* Removes `key` and its value from the list cache.
*
* @private
* @name delete
* @memberOf ListCache
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function listCacheDelete(key) {
var data = this.__data__,
index = assocIndexOf(data, key);
if (index < 0) {
return false;
}
var lastIndex = data.length - 1;
if (index == lastIndex) {
data.pop();
} else {
splice.call(data, index, 1);
}
return true;
}
/**
* Gets the list cache value for `key`.
*
* @private
* @name get
* @memberOf ListCache
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function listCacheGet(key) {
var data = this.__data__,
index = assocIndexOf(data, key);
return index < 0 ? undefined : data[index][1];
}
/**
* Checks if a list cache value for `key` exists.
*
* @private
* @name has
* @memberOf ListCache
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function listCacheHas(key) {
return assocIndexOf(this.__data__, key) > -1;
}
/**
* Sets the list cache `key` to `value`.
*
* @private
* @name set
* @memberOf ListCache
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the list cache instance.
*/
function listCacheSet(key, value) {
var data = this.__data__,
index = assocIndexOf(data, key);
if (index < 0) {
data.push([key, value]);
} else {
data[index][1] = value;
}
return this;
}
// Add methods to `ListCache`.
ListCache.prototype.clear = listCacheClear;
ListCache.prototype['delete'] = listCacheDelete;
ListCache.prototype.get = listCacheGet;
ListCache.prototype.has = listCacheHas;
ListCache.prototype.set = listCacheSet;
/**
* Creates a map cache object to store key-value pairs.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function MapCache(entries) {
var index = -1,
length = entries ? entries.length : 0;
this.clear();
while (++index < length) {
var entry = entries[index];
this.set(entry[0], entry[1]);
}
}
/**
* Removes all key-value entries from the map.
*
* @private
* @name clear
* @memberOf MapCache
*/
function mapCacheClear() {
this.__data__ = {
'hash': new Hash,
'map': new (Map || ListCache),
'string': new Hash
};
}
/**
* Removes `key` and its value from the map.
*
* @private
* @name delete
* @memberOf MapCache
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function mapCacheDelete(key) {
return getMapData(this, key)['delete'](key);
}
/**
* Gets the map value for `key`.
*
* @private
* @name get
* @memberOf MapCache
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function mapCacheGet(key) {
return getMapData(this, key).get(key);
}
/**
* Checks if a map value for `key` exists.
*
* @private
* @name has
* @memberOf MapCache
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function mapCacheHas(key) {
return getMapData(this, key).has(key);
}
/**
* Sets the map `key` to `value`.
*
* @private
* @name set
* @memberOf MapCache
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the map cache instance.
*/
function mapCacheSet(key, value) {
getMapData(this, key).set(key, value);
return this;
}
// Add methods to `MapCache`.
MapCache.prototype.clear = mapCacheClear;
MapCache.prototype['delete'] = mapCacheDelete;
MapCache.prototype.get = mapCacheGet;
MapCache.prototype.has = mapCacheHas;
MapCache.prototype.set = mapCacheSet;
/**
* Gets the index at which the `key` is found in `array` of key-value pairs.
*
* @private
* @param {Array} array The array to inspect.
* @param {*} key The key to search for.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function assocIndexOf(array, key) {
var length = array.length;
while (length--) {
if (eq(array[length][0], key)) {
return length;
}
}
return -1;
}
/**
* The base implementation of `_.get` without support for default values.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} path The path of the property to get.
* @returns {*} Returns the resolved value.
*/
function baseGet(object, path) {
path = isKey(path, object) ? [path] : castPath(path);
var index = 0,
length = path.length;
while (object != null && index < length) {
object = object[toKey(path[index++])];
}
return (index && index == length) ? object : undefined;
}
/**
* The base implementation of `_.isNative` without bad shim checks.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a native function,
* else `false`.
*/
function baseIsNative(value) {
if (!isObject(value) || isMasked(value)) {
return false;
}
var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
return pattern.test(toSource(value));
}
/**
* The base implementation of `_.toString` which doesn't convert nullish
* values to empty strings.
*
* @private
* @param {*} value The value to process.
* @returns {string} Returns the string.
*/
function baseToString(value) {
// Exit early for strings to avoid a performance hit in some environments.
if (typeof value == 'string') {
return value;
}
if (isSymbol(value)) {
return symbolToString ? symbolToString.call(value) : '';
}
var result = (value + '');
return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
}
/**
* Casts `value` to a path array if it's not one.
*
* @private
* @param {*} value The value to inspect.
* @returns {Array} Returns the cast property path array.
*/
function castPath(value) {
return isArray(value) ? value : stringToPath(value);
}
/**
* Gets the data for `map`.
*
* @private
* @param {Object} map The map to query.
* @param {string} key The reference key.
* @returns {*} Returns the map data.
*/
function getMapData(map, key) {
var data = map.__data__;
return isKeyable(key)
? data[typeof key == 'string' ? 'string' : 'hash']
: data.map;
}
/**
* Gets the native function at `key` of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {string} key The key of the method to get.
* @returns {*} Returns the function if it's native, else `undefined`.
*/
function getNative(object, key) {
var value = getValue(object, key);
return baseIsNative(value) ? value : undefined;
}
/**
* Checks if `value` is a property name and not a property path.
*
* @private
* @param {*} value The value to check.
* @param {Object} [object] The object to query keys on.
* @returns {boolean} Returns `true` if `value` is a property name, else `false`.
*/
function isKey(value, object) {
if (isArray(value)) {
return false;
}
var type = typeof value;
if (type == 'number' || type == 'symbol' || type == 'boolean' ||
value == null || isSymbol(value)) {
return true;
}
return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
(object != null && value in Object(object));
}
/**
* Checks if `value` is suitable for use as unique object key.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is suitable, else `false`.
*/
function isKeyable(value) {
var type = typeof value;
return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
? (value !== '__proto__')
: (value === null);
}
/**
* Checks if `func` has its source masked.
*
* @private
* @param {Function} func The function to check.
* @returns {boolean} Returns `true` if `func` is masked, else `false`.
*/
function isMasked(func) {
return !!maskSrcKey && (maskSrcKey in func);
}
/**
* Converts `string` to a property path array.
*
* @private
* @param {string} string The string to convert.
* @returns {Array} Returns the property path array.
*/
var stringToPath = memoize(function(string) {
string = toString(string);
var result = [];
if (reLeadingDot.test(string)) {
result.push('');
}
string.replace(rePropName, function(match, number, quote, string) {
result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
});
return result;
});
/**
* Converts `value` to a string key if it's not a string or symbol.
*
* @private
* @param {*} value The value to inspect.
* @returns {string|symbol} Returns the key.
*/
function toKey(value) {
if (typeof value == 'string' || isSymbol(value)) {
return value;
}
var result = (value + '');
return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
}
/**
* Converts `func` to its source code.
*
* @private
* @param {Function} func The function to process.
* @returns {string} Returns the source code.
*/
function toSource(func) {
if (func != null) {
try {
return funcToString.call(func);
} catch (e) {}
try {
return (func + '');
} catch (e) {}
}
return '';
}
/**
* Creates a function that memoizes the result of `func`. If `resolver` is
* provided, it determines the cache key for storing the result based on the
* arguments provided to the memoized function. By default, the first argument
* provided to the memoized function is used as the map cache key. The `func`
* is invoked with the `this` binding of the memoized function.
*
* **Note:** The cache is exposed as the `cache` property on the memoized
* function. Its creation may be customized by replacing the `_.memoize.Cache`
* constructor with one whose instances implement the
* [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
* method interface of `delete`, `get`, `has`, and `set`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to have its output memoized.
* @param {Function} [resolver] The function to resolve the cache key.
* @returns {Function} Returns the new memoized function.
* @example
*
* var object = { 'a': 1, 'b': 2 };
* var other = { 'c': 3, 'd': 4 };
*
* var values = _.memoize(_.values);
* values(object);
* // => [1, 2]
*
* values(other);
* // => [3, 4]
*
* object.a = 2;
* values(object);
* // => [1, 2]
*
* // Modify the result cache.
* values.cache.set(object, ['a', 'b']);
* values(object);
* // => ['a', 'b']
*
* // Replace `_.memoize.Cache`.
* _.memoize.Cache = WeakMap;
*/
function memoize(func, resolver) {
if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
throw new TypeError(FUNC_ERROR_TEXT);
}
var memoized = function() {
var args = arguments,
key = resolver ? resolver.apply(this, args) : args[0],
cache = memoized.cache;
if (cache.has(key)) {
return cache.get(key);
}
var result = func.apply(this, args);
memoized.cache = cache.set(key, result);
return result;
};
memoized.cache = new (memoize.Cache || MapCache);
return memoized;
}
// Assign cache to `_.memoize`.
memoize.Cache = MapCache;
/**
* Performs a
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* comparison between two values to determine if they are equivalent.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
* @example
*
* var object = { 'a': 1 };
* var other = { 'a': 1 };
*
* _.eq(object, object);
* // => true
*
* _.eq(object, other);
* // => false
*
* _.eq('a', 'a');
* // => true
*
* _.eq('a', Object('a'));
* // => false
*
* _.eq(NaN, NaN);
* // => true
*/
function eq(value, other) {
return value === other || (value !== value && other !== other);
}
/**
* Checks if `value` is classified as an `Array` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an array, else `false`.
* @example
*
* _.isArray([1, 2, 3]);
* // => true
*
* _.isArray(document.body.children);
* // => false
*
* _.isArray('abc');
* // => false
*
* _.isArray(_.noop);
* // => false
*/
var isArray = Array.isArray;
/**
* Checks if `value` is classified as a `Function` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a function, else `false`.
* @example
*
* _.isFunction(_);
* // => true
*
* _.isFunction(/abc/);
* // => false
*/
function isFunction(value) {
// The use of `Object#toString` avoids issues with the `typeof` operator
// in Safari 8-9 which returns 'object' for typed array and other constructors.
var tag = isObject(value) ? objectToString.call(value) : '';
return tag == funcTag || tag == genTag;
}
/**
* Checks if `value` is the
* [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
* of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an object, else `false`.
* @example
*
* _.isObject({});
* // => true
*
* _.isObject([1, 2, 3]);
* // => true
*
* _.isObject(_.noop);
* // => true
*
* _.isObject(null);
* // => false
*/
function isObject(value) {
var type = typeof value;
return !!value && (type == 'object' || type == 'function');
}
/**
* Checks if `value` is object-like. A value is object-like if it's not `null`
* and has a `typeof` result of "object".
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
* @example
*
* _.isObjectLike({});
* // => true
*
* _.isObjectLike([1, 2, 3]);
* // => true
*
* _.isObjectLike(_.noop);
* // => false
*
* _.isObjectLike(null);
* // => false
*/
function isObjectLike(value) {
return !!value && typeof value == 'object';
}
/**
* Checks if `value` is classified as a `Symbol` primitive or object.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
* @example
*
* _.isSymbol(Symbol.iterator);
* // => true
*
* _.isSymbol('abc');
* // => false
*/
function isSymbol(value) {
return typeof value == 'symbol' ||
(isObjectLike(value) && objectToString.call(value) == symbolTag);
}
/**
* Converts `value` to a string. An empty string is returned for `null`
* and `undefined` values. The sign of `-0` is preserved.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to process.
* @returns {string} Returns the string.
* @example
*
* _.toString(null);
* // => ''
*
* _.toString(-0);
* // => '-0'
*
* _.toString([1, 2, 3]);
* // => '1,2,3'
*/
function toString(value) {
return value == null ? '' : baseToString(value);
}
/**
* Gets the value at `path` of `object`. If the resolved value is
* `undefined`, the `defaultValue` is returned in its place.
*
* @static
* @memberOf _
* @since 3.7.0
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path of the property to get.
* @param {*} [defaultValue] The value returned for `undefined` resolved values.
* @returns {*} Returns the resolved value.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }] };
*
* _.get(object, 'a[0].b.c');
* // => 3
*
* _.get(object, ['a', '0', 'b', 'c']);
* // => 3
*
* _.get(object, 'a.b.c', 'default');
* // => 'default'
*/
function get(object, path, defaultValue) {
var result = object == null ? undefined : baseGet(object, path);
return result === undefined ? defaultValue : result;
}
var lodash_get = get;
function getProp(obj, path, defaultValue) {
return obj[path] === undefined ? defaultValue : obj[path];
}
function setProp(obj, path, value) {
var pathArray = Array.isArray(path) ? path : path.split('.');
var key = pathArray[0];
var newValue = pathArray.length > 1 ? setProp(obj[key] || {}, pathArray.slice(1), value) : value;
return Object.assign({}, obj, _defineProperty({}, key, newValue));
}
function flattenReducer(acc, arr) {
try {
// This is faster but susceptible to `RangeError: Maximum call stack size exceeded`
acc.push.apply(acc, _toConsumableArray(arr));
return acc;
} catch (err) {
// Fallback to a slower but safer option
return acc.concat(arr);
}
}
function fastJoin(arr, separator) {
var isFirst = true;
return arr.reduce(function (acc, elem) {
if (elem === null || elem === undefined) {
elem = '';
}
if (isFirst) {
isFirst = false;
return "".concat(elem);
}
return "".concat(acc).concat(separator).concat(elem);
}, '');
}
var utils = {
getProp: getProp,
setProp: setProp,
fastJoin: fastJoin,
flattenReducer: flattenReducer
};
var getProp$1 = utils.getProp,
setProp$1 = utils.setProp,
fastJoin$1 = utils.fastJoin,
flattenReducer$1 = utils.flattenReducer;
var JSON2CSVBase =
/*#__PURE__*/
function () {
function JSON2CSVBase(opts) {
_classCallCheck(this, JSON2CSVBase);
this.opts = this.preprocessOpts(opts);
this.preprocessRow = this.memoizePreprocessRow();
}
/**
* Check passing opts and set defaults.
*
* @param {Json2CsvOptions} opts Options object containing fields,
* delimiter, default value, quote mark, header, etc.
*/
_createClass(JSON2CSVBase, [{
key: "preprocessOpts",
value: function preprocessOpts(opts) {
var processedOpts = Object.assign({}, opts);
processedOpts.unwind = !Array.isArray(processedOpts.unwind) ? processedOpts.unwind ? [processedOpts.unwind] : [] : processedOpts.unwind;
processedOpts.delimiter = processedOpts.delimiter || ',';
processedOpts.flattenSeparator = processedOpts.flattenSeparator || '.';
processedOpts.eol = processedOpts.eol || os.EOL;
processedOpts.quote = typeof processedOpts.quote === 'string' ? opts.quote : '"';
processedOpts.doubleQuote = typeof processedOpts.doubleQuote === 'string' ? processedOpts.doubleQuote : processedOpts.quote + processedOpts.quote;
processedOpts.header = processedOpts.header !== false;
processedOpts.includeEmptyRows = processedOpts.includeEmptyRows || false;
processedOpts.withBOM = processedOpts.withBOM || false;
return processedOpts;
}
/**
* Check and normalize the fields configuration.
*
* @param {(string|object)[]} fields Fields configuration provided by the user
* or inferred from the data
* @returns {object[]} preprocessed FieldsInfo array
*/
}, {
key: "preprocessFieldsInfo",
value: function preprocessFieldsInfo(fields) {
var _this = this;
return fields.map(function (fieldInfo) {
if (typeof fieldInfo === 'string') {
return {
label: fieldInfo,
value: fieldInfo.includes('.') || fieldInfo.includes('[') ? function (row) {
return lodash_get(row, fieldInfo, _this.opts.defaultValue);
} : function (row) {
return getProp$1(row, fieldInfo, _this.opts.defaultValue);
},
stringify: true
};
}
if (_typeof(fieldInfo) === 'object') {
var defaultValue = 'default' in fieldInfo ? fieldInfo.default : _this.opts.defaultValue;
if (typeof fieldInfo.value === 'string') {
return {
label: fieldInfo.label || fieldInfo.value,
value: fieldInfo.value.includes('.') || fieldInfo.value.includes('[') ? function (row) {
return lodash_get(row, fieldInfo.value, defaultValue);
} : function (row) {
return getProp$1(row, fieldInfo.value, defaultValue);
},
stringify: fieldInfo.stringify !== undefined ? fieldInfo.stringify : true
};
}
if (typeof fieldInfo.value === 'function') {
var label = fieldInfo.label || fieldInfo.value.name || '';
var field = {
label: label,
default: defaultValue
};
return {
label: label,
value: function value(row) {
var value = fieldInfo.value(row, field);
return value === null || value === undefined ? defaultValue : value;
},
stringify: fieldInfo.stringify !== undefined ? fieldInfo.stringify : true
};
}
}
throw new Error('Invalid field info option. ' + JSON.stringify(fieldInfo));
});
}
/**
* Create the title row with all the provided fields as column headings
*
* @returns {String} titles as a string
*/
}, {
key: "getHeader",
value: function getHeader() {
var _this2 = this;
return fastJoin$1(this.opts.fields.map(function (fieldInfo) {
return _this2.processValue(fieldInfo.label, true);
}), this.opts.delimiter);
}
}, {
key: "memoizePreprocessRow",
value: function memoizePreprocessRow() {
if (this.opts.unwind && this.opts.unwind.length) {
if (this.opts.flatten) {
return function (row) {
var _this3 = this;
return this.unwindData(row, this.opts.unwind).map(function (row) {
return _this3.flatten(row, _this3.opts.flattenSeparator);
});
};
}
return function (row) {
return this.unwindData(row, this.opts.unwind);
};
}
if (this.opts.flatten) {
return function (row) {
return [this.flatten(row, this.opts.flattenSeparator)];
};
}
return function (row) {
return [row];
};
}
/**
* Preprocess each object according to the give opts (unwind, flatten, etc.).
* The actual body of the function is dynamically set on the constructor by the
* `memoizePreprocessRow` method after parsing the options.
*
* @param {Object} row JSON object to be converted in a CSV row
*/
}, {
key: "preprocessRow",
value: function preprocessRow() {}
/**
* Create the content of a specific CSV row
*
* @param {Object} row JSON object to be converted in a CSV row
* @returns {String} CSV string (row)
*/
}, {
key: "processRow",
value: function processRow(row) {
var _this4 = this;
if (!row) {
return undefined;
}
var processedRow = this.opts.fields.map(function (fieldInfo) {
return _this4.processCell(row, fieldInfo);
});
if (!this.opts.includeEmptyRows && processedRow.every(function (field) {
return field === undefined;
})) {
return undefined;
}
return fastJoin$1(processedRow, this.opts.delimiter);
}
/**
* Create the content of a specfic CSV row cell
*
* @param {Object} row JSON object representing the CSV row that the cell belongs to
* @param {FieldInfo} fieldInfo Details of the field to process to be a CSV cell
* @returns {String} CSV string (cell)
*/
}, {
key: "processCell",
value: function processCell(row, fieldInfo) {
return this.processValue(fieldInfo.value(row), fieldInfo.stringify);
}
/**
* Create the content of a specfic CSV row cell
*
* @param {Any} value Value to be included in a CSV cell
* @param {Boolean} stringify Details of the field to process to be a CSV cell
* @returns {String} Value stringified and processed
*/
}, {
key: "processValue",
value: function processValue(value, stringify) {
if (value === null || value === undefined) {
return undefined;
}
var valueType = _typeof(value);
if (valueType !== 'boolean' && valueType !== 'number' && valueType !== 'string') {
value = JSON.stringify(value);
if (value === undefined) {
return undefined;
}
if (value[0] === '"') {
value = value.replace(/^"(.+)"$/, '$1');
}
}
if (typeof value === 'string') {
if (value.includes(this.opts.quote)) {
value = value.replace(new RegExp(this.opts.quote, 'g'), this.opts.doubleQuote);
} // This should probably be remove together with the whole strignify option
if (stringify) {
value = "".concat(this.opts.quote).concat(value).concat(this.opts.quote);
} else {
value = value.replace(new RegExp("^".concat(this.opts.doubleQuote)), this.opts.quote).replace(new RegExp("".concat(this.opts.doubleQuote, "$")), this.opts.quote);
}
if (this.opts.excelStrings) {
value = "\"=\"".concat(value, "\"\"");
}
}
return value;
}
/**
* Performs the flattening of a data row recursively
*
* @param {Object} dataRow Original JSON object
* @param {String} separator Separator to be used as the flattened field name
* @returns {Object} Flattened object
*/
}, {
key: "flatten",
value: function flatten(dataRow, separator) {
function step(obj, flatDataRow, currentPath) {
Object.keys(obj).forEach(function (key) {
var value = obj[key];
var newPath = currentPath ? "".concat(currentPath).concat(separator).concat(key) : key;
if (_typeof(value) !== 'object' || value === null || Array.isArray(value) || Object.prototype.toString.call(value.toJSON) === '[object Function]' || !Object.keys(value).length) {
flatDataRow[newPath] = value;
return;
}
step(value, flatDataRow, newPath);
});
return flatDataRow;
}
return step(dataRow, {});
}
/**
* Performs the unwind recursively in specified sequence
*
* @param {Object} dataRow Original JSON object
* @param {String[]} unwindPaths The paths as strings to be used to deconstruct the array
* @returns {Array} Array of objects containing all rows after unwind of chosen paths
*/
}, {
key: "unwindData",
value: function unwindData(dataRow, unwindPaths) {
var _this5 = this;
var unwind = function unwind(rows, unwindPath) {
return rows.map(function (row) {
var unwindArray = lodash_get(row, unwindPath);
if (!Array.isArray(unwindArray)) {
return row;
}
if (!unwindArray.length) {
return setProp$1(row, unwindPath, undefined);
}
return unwindArray.map(function (unwindRow, index) {
var clonedRow = _this5.opts.unwindBlank && index > 0 ? {} : row;
return setProp$1(clonedRow, unwindPath, unwindRow);
});
}).reduce(flattenReducer$1, []);
};
return unwindPaths.reduce(unwind, [dataRow]);
}
}]);
return JSON2CSVBase;
}();
var JSON2CSVBase_1 = JSON2CSVBase;
var fastJoin$2 = utils.fastJoin,
flattenReducer$2 = utils.flattenReducer;
var JSON2CSVParser =
/*#__PURE__*/
function (_JSON2CSVBase) {
_inherits(JSON2CSVParser, _JSON2CSVBase);
function JSON2CSVParser(opts) {
var _this;
_classCallCheck(this, JSON2CSVParser);
_this = _possibleConstructorReturn(this, _getPrototypeOf(JSON2CSVParser).call(this, opts));
if (_this.opts.fields) {
_this.opts.fields = _this.preprocessFieldsInfo(_this.opts.fields);
}
return _this;
}
/**
* Main function that converts json to csv.
*
* @param {Array|Object} data Array of JSON objects to be converted to CSV
* @returns {String} The CSV formated data as a string
*/
_createClass(JSON2CSVParser, [{
key: "parse",
value: function parse(data) {
var processedData = this.preprocessData(data);
if (!this.opts.fields) {
this.opts.fields = processedData.reduce(function (fields, item) {
Object.keys(item).forEach(function (field) {
if (!fields.includes(field)) {
fields.push(field);
}
});
return fields;
}, []);
this.opts.fields = this.preprocessFieldsInfo(this.opts.fields);
}
var header = this.opts.header ? this.getHeader() : '';
var rows = this.processData(processedData);
var csv = (this.opts.withBOM ? "\uFEFF" : '') + header + (header && rows ? this.opts.eol : '') + rows;
return csv;
}
/**
* Preprocess the data according to the give opts (unwind, flatten, etc.)
and calculate the fields and field names if they are not provided.
*
* @param {Array|Object} data Array or object to be converted to CSV
*/
}, {
key: "preprocessData",
value: function preprocessData(data) {
var _this2 = this;
var processedData = Array.isArray(data) ? data : [data];
if (!this.opts.fields && (processedData.length === 0 || _typeof(processedData[0]) !== 'object')) {
throw new Error('Data should not be empty or the "fields" option should be included');
}
if ((!this.opts.unwind || !this.opts.unwind.length) && !this.opts.flatten) {
return processedData;
}
return processedData.map(function (row) {
return _this2.preprocessRow(row);
}).reduce(flattenReducer$2, []);
}
/**
* Create the content row by row below the header
*
* @param {Array} data Array of JSON objects to be converted to CSV
* @returns {String} CSV string (body)
*/
}, {
key: "processData",
value: function processData(data) {
var _this3 = this;
return fastJoin$2(data.map(function (row) {
return _this3.processRow(row);
}).filter(function (row) {
return row;
}), // Filter empty rows
this.opts.eol);
}
}]);
return JSON2CSVParser;
}(JSON2CSVBase_1);
var JSON2CSVParser_1 = JSON2CSVParser;
/*global Buffer*/
// Named constants with unique integer values
var C = {};
// Tokens
var LEFT_BRACE = C.LEFT_BRACE = 0x1;
var RIGHT_BRACE = C.RIGHT_BRACE = 0x2;
var LEFT_BRACKET = C.LEFT_BRACKET = 0x3;
var RIGHT_BRACKET = C.RIGHT_BRACKET = 0x4;
var COLON = C.COLON = 0x5;
var COMMA = C.COMMA = 0x6;
var TRUE = C.TRUE = 0x7;
var FALSE = C.FALSE = 0x8;
var NULL = C.NULL = 0x9;
var STRING = C.STRING = 0xa;
var NUMBER = C.NUMBER = 0xb;
// Tokenizer States
var START = C.START = 0x11;
var STOP = C.STOP = 0x12;
var TRUE1 = C.TRUE1 = 0x21;
var TRUE2 = C.TRUE2 = 0x22;
var TRUE3 = C.TRUE3 = 0x23;
var FALSE1 = C.FALSE1 = 0x31;
var FALSE2 = C.FALSE2 = 0x32;
var FALSE3 = C.FALSE3 = 0x33;
var FALSE4 = C.FALSE4 = 0x34;
var NULL1 = C.NULL1 = 0x41;
var NULL2 = C.NULL2 = 0x42;
var NULL3 = C.NULL3 = 0x43;
var NUMBER1 = C.NUMBER1 = 0x51;
var NUMBER3 = C.NUMBER3 = 0x53;
var STRING1 = C.STRING1 = 0x61;
var STRING2 = C.STRING2 = 0x62;
var STRING3 = C.STRING3 = 0x63;
var STRING4 = C.STRING4 = 0x64;
var STRING5 = C.STRING5 = 0x65;
var STRING6 = C.STRING6 = 0x66;
// Parser States
var VALUE = C.VALUE = 0x71;
var KEY = C.KEY = 0x72;
// Parser Modes
var OBJECT = C.OBJECT = 0x81;
var ARRAY = C.ARRAY = 0x82;
// Character constants
var BACK_SLASH = "\\".charCodeAt(0);
var FORWARD_SLASH = "\/".charCodeAt(0);
var BACKSPACE = "\b".charCodeAt(0);
var FORM_FEED = "\f".charCodeAt(0);
var NEWLINE = "\n".charCodeAt(0);
var CARRIAGE_RETURN = "\r".charCodeAt(0);
var TAB = "\t".charCodeAt(0);
var STRING_BUFFER_SIZE = 64 * 1024;
function Parser() {
this.tState = START;
this.value = undefined;
this.string = undefined; // string data
this.stringBuffer = Buffer.alloc ? Buffer.alloc(STRING_BUFFER_SIZE) : new Buffer(STRING_BUFFER_SIZE);
this.stringBufferOffset = 0;
this.unicode = undefined; // unicode escapes
this.highSurrogate = undefined;
this.key = undefined;
this.mode = undefined;
this.stack = [];
this.state = VALUE;
this.bytes_remaining = 0; // number of bytes remaining in multi byte utf8 char to read after split boundary
this.bytes_in_sequence = 0; // bytes in multi byte utf8 char to read
this.temp_buffs = { "2": new Buffer(2), "3": new Buffer(3), "4": new Buffer(4) }; // for rebuilding chars split before boundary is reached
// Stream offset
this.offset = -1;
}
// Slow code to string converter (only used when throwing syntax errors)
Parser.toknam = function (code) {
var keys = Object.keys(C);
for (var i = 0, l = keys.length; i < l; i++) {
var key = keys[i];
if (C[key] === code) { return key; }
}
return code && ("0x" + code.toString(16));
};
var proto = Parser.prototype;
proto.onError = function (err) { throw err; };
proto.charError = function (buffer, i) {
this.tState = STOP;
this.onError(new Error("Unexpected " + JSON.stringify(String.fromCharCode(buffer[i])) + " at position " + i + " in state " + Parser.toknam(this.tState)));
};
proto.appendStringChar = function (char) {
if (this.stringBufferOffset >= STRING_BUFFER_SIZE) {
this.string += this.stringBuffer.toString('utf8');
this.stringBufferOffset = 0;
}
this.stringBuffer[this.stringBufferOffset++] = char;
};
proto.appendStringBuf = function (buf, start, end) {
var size = buf.length;
if (typeof start === 'number') {
if (typeof end === 'number') {
if (end < 0) {
// adding a negative end decreeses the size
size = buf.length - start + end;
} else {
size = end - start;
}
} else {
size = buf.length - start;
}
}
if (size < 0) {
size = 0;
}
if (this.stringBufferOffset + size > STRING_BUFFER_SIZE) {
this.string += this.stringBuffer.toString('utf8', 0, this.stringBufferOffset);
this.stringBufferOffset = 0;
}
buf.copy(this.stringBuffer, this.stringBufferOffset, start, end);
this.stringBufferOffset += size;
};
proto.write = function (buffer) {
if (typeof buffer === "string") buffer = new Buffer(buffer);
var n;
for (var i = 0, l = buffer.length; i < l; i++) {
if (this.tState === START){
n = buffer[i];
this.offset++;
if(n === 0x7b){ this.onToken(LEFT_BRACE, "{"); // {
}else if(n === 0x7d){ this.onToken(RIGHT_BRACE, "}"); // }
}else if(n === 0x5b){ this.onToken(LEFT_BRACKET, "["); // [
}else if(n === 0x5d){ this.onToken(RIGHT_BRACKET, "]"); // ]
}else if(n === 0x3a){ this.onToken(COLON, ":"); // :
}else if(n === 0x2c){ this.onToken(COMMA, ","); // ,
}else if(n === 0x74){ this.tState = TRUE1; // t
}else if(n === 0x66){ this.tState = FALSE1; // f
}else if(n === 0x6e){ this.tState = NULL1; // n
}else if(n === 0x22){ // "
this.string = "";
this.stringBufferOffset = 0;
this.tState = STRING1;
}else if(n === 0x2d){ this.string = "-"; this.tState = NUMBER1; // -
}else{
if (n >= 0x30 && n < 0x40) { // 1-9
this.string = String.fromCharCode(n); this.tState = NUMBER3;
} else if (n === 0x20 || n === 0x09 || n === 0x0a || n === 0x0d) ; else {
return this.charError(buffer, i);
}
}
}else if (this.tState === STRING1){ // After open quote
n = buffer[i]; // get current byte from buffer
// check for carry over of a multi byte char split between data chunks
// & fill temp buffer it with start of this data chunk up to the boundary limit set in the last iteration
if (this.bytes_remaining > 0) {
for (var j = 0; j < this.bytes_remaining; j++) {
this.temp_buffs[this.bytes_in_sequence][this.bytes_in_sequence - this.bytes_remaining + j] = buffer[j];
}
this.appendStringBuf(this.temp_buffs[this.bytes_in_sequence]);
this.bytes_in_sequence = this.bytes_remaining = 0;
i = i + j - 1;
} else if (this.bytes_remaining === 0 && n >= 128) { // else if no remainder bytes carried over, parse multi byte (>=128) chars one at a time
if (n <= 193 || n > 244) {
return this.onError(new Error("Invalid UTF-8 character at position " + i + " in state " + Parser.toknam(this.tState)));
}
if ((n >= 194) && (n <= 223)) this.bytes_in_sequence = 2;
if ((n >= 224) && (n <= 239)) this.bytes_in_sequence = 3;
if ((n >= 240) && (n <= 244)) this.bytes_in_sequence = 4;
if ((this.bytes_in_sequence + i) > buffer.length) { // if bytes needed to complete char fall outside buffer length, we have a boundary split
for (var k = 0; k <= (buffer.length - 1 - i); k++) {
this.temp_buffs[this.bytes_in_sequence][k] = buffer[i + k]; // fill temp buffer of correct size with bytes available in this chunk
}
this.bytes_remaining = (i + this.bytes_in_sequence) - buffer.length;
i = buffer.length - 1;
} else {
this.appendStringBuf(buffer, i, i + this.bytes_in_sequence);
i = i + this.bytes_in_sequence - 1;
}
} else if (n === 0x22) {
this.tState = START;
this.string += this.stringBuffer.toString('utf8', 0, this.stringBufferOffset);
this.stringBufferOffset = 0;
this.onToken(STRING, this.string);
this.offset += Buffer.byteLength(this.string, 'utf8') + 1;
this.string = undefined;
}
else if (n === 0x5c) {
this.tState = STRING2;
}
else if (n >= 0x20) { this.appendStringChar(n); }
else {
return this.charError(buffer, i);
}
}else if (this.tState === STRING2){ // After backslash
n = buffer[i];
if(n === 0x22){ this.appendStringChar(n); this.tState = STRING1;
}else if(n === 0x5c){ this.appendStringChar(BACK_SLASH); this.tState = STRING1;
}else if(n === 0x2f){ this.appendStringChar(FORWARD_SLASH); this.tState = STRING1;
}else if(n === 0x62){ this.appendStringChar(BACKSPACE); this.tState = STRING1;
}else if(n === 0x66){ this.appendStringChar(FORM_FEED); this.tState = STRING1;
}else if(n === 0x6e){ this.appendStringChar(NEWLINE); this.tState = STRING1;
}else if(n === 0x72){ this.appendStringChar(CARRIAGE_RETURN); this.tState = STRING1;
}else if(n === 0x74){ this.appendStringChar(TAB); this.tState = STRING1;
}else if(n === 0x75){ this.unicode = ""; this.tState = STRING3;
}else{
return this.charError(buffer, i);
}
}else if (this.tState === STRING3 || this.tState === STRING4 || this.tState === STRING5 || this.tState === STRING6){ // unicode hex codes
n = buffer[i];
// 0-9 A-F a-f
if ((n >= 0x30 && n < 0x40) || (n > 0x40 && n <= 0x46) || (n > 0x60 && n <= 0x66)) {
this.unic