'use strict';
var bind = require('./helpers/bind');
// utils is a library of generic helper functions non-specific to axios
var toString = Object.prototype.toString;
// eslint-disable-next-line func-names
var kindOf = (function(cache) {
// eslint-disable-next-line func-names
return function(thing) {
var str = toString.call(thing);
return cache[str] || (cache[str] = str.slice(8, -1).toLowerCase());
};
})(Object.create(null));
function kindOfTest(type) {
type = type.toLowerCase();
return function isKindOf(thing) {
return kindOf(thing) === type;
};
}
/**
* Determine if a value is an Array
*
* @param {Object} val The value to test
* @returns {boolean} True if value is an Array, otherwise false
*/
function isArray(val) {
return Array.isArray(val);
}
/**
* Determine if a value is undefined
*
* @param {Object} val The value to test
* @returns {boolean} True if the value is undefined, otherwise false
*/
function isUndefined(val) {
return typeof val === 'undefined';
}
/**
* Determine if a value is a Buffer
*
* @param {Object} val The value to test
* @returns {boolean} True if value is a Buffer, otherwise false
*/
function isBuffer(val) {
return val !== null && !isUndefined(val) && val.constructor !== null && !isUndefined(val.constructor)
&& typeof val.constructor.isBuffer === 'function' && val.constructor.isBuffer(val);
}
/**
* Determine if a value is an ArrayBuffer
*
* @function
* @param {Object} val The value to test
* @returns {boolean} True if value is an ArrayBuffer, otherwise false
*/
var isArrayBuffer = kindOfTest('ArrayBuffer');
/**
* Determine if a value is a view on an ArrayBuffer
*
* @param {Object} val The value to test
* @returns {boolean} True if value is a view on an ArrayBuffer, otherwise false
*/
function isArrayBufferView(val) {
var result;
if ((typeof ArrayBuffer !== 'undefined') && (ArrayBuffer.isView)) {
result = ArrayBuffer.isView(val);
} else {
result = (val) && (val.buffer) && (isArrayBuffer(val.buffer));
}
return result;
}
/**
* Determine if a value is a String
*
* @param {Object} val The value to test
* @returns {boolean} True if value is a String, otherwise false
*/
function isString(val) {
return typeof val === 'string';
}
/**
* Determine if a value is a Number
*
* @param {Object} val The value to test
* @returns {boolean} True if value is a Number, otherwise false
*/
function isNumber(val) {
return typeof val === 'number';
}
/**
* Determine if a value is an Object
*
* @param {Object} val The value to test
* @returns {boolean} True if value is an Object, otherwise false
*/
function isObject(val) {
return val !== null && typeof val === 'object';
}
/**
* Determine if a value is a plain Object
*
* @param {Object} val The value to test
* @return {boolean} True if value is a plain Object, otherwise false
*/
function isPlainObject(val) {
if (kindOf(val) !== 'object') {
return false;
}
var prototype = Object.getPrototypeOf(val);
return prototype === null || prototype === Object.prototype;
}
/**
* Determine if a value is a Date
*
* @function
* @param {Object} val The value to test
* @returns {boolean} True if value is a Date, otherwise false
*/
var isDate = kindOfTest('Date');
/**
* Determine if a value is a File
*
* @function
* @param {Object} val The value to test
* @returns {boolean} True if value is a File, otherwise false
*/
var isFile = kindOfTest('File');
/**
* Determine if a value is a Blob
*
* @function
* @param {Object} val The value to test
* @returns {boolean} True if value is a Blob, otherwise false
*/
var isBlob = kindOfTest('Blob');
/**
* Determine if a value is a FileList
*
* @function
* @param {Object} val The value to test
* @returns {boolean} True if value is a File, otherwise false
*/
var isFileList = kindOfTest('FileList');
/**
* Determine if a value is a Function
*
* @param {Object} val The value to test
* @returns {boolean} True if value is a Function, otherwise false
*/
function isFunction(val) {
return toString.call(val) === '[object Function]';
}
/**
* Determine if a value is a Stream
*
* @param {Object} val The value to test
* @returns {boolean} True if value is a Stream, otherwise false
*/
function isStream(val) {
return isObject(val) && isFunction(val.pipe);
}
/**
* Determine if a value is a FormData
*
* @param {Object} thing The value to test
* @returns {boolean} True if value is an FormData, otherwise false
*/
function isFormData(thing) {
var pattern = '[object FormData]';
return thing && (
(typeof FormData === 'function' && thing instanceof FormData) ||
toString.call(thing) === pattern ||
(isFunction(thing.toString) && thing.toString() === pattern)
);
}
/**
* Determine if a value is a URLSearchParams object
* @function
* @param {Object} val The value to test
* @returns {boolean} True if value is a URLSearchParams object, otherwise false
*/
var isURLSearchParams = kindOfTest('URLSearchParams');
/**
* Trim excess whitespace off the beginning and end of a string
*
* @param {String} str The String to trim
* @returns {String} The String freed of excess whitespace
*/
function trim(str) {
return str.trim ? str.trim() : str.replace(/^\s+|\s+$/g, '');
}
/**
* Determine if we're running in a standard browser environment
*
* This allows axios to run in a web worker, and react-native.
* Both environments support XMLHttpRequest, but not fully standard globals.
*
* web workers:
* typeof window -> undefined
* typeof document -> undefined
*
* react-native:
* navigator.product -> 'ReactNative'
* nativescript
* navigator.product -> 'NativeScript' or 'NS'
*/
function isStandardBrowserEnv() {
if (typeof navigator !== 'undefined' && (navigator.product === 'ReactNative' ||
navigator.product === 'NativeScript' ||
navigator.product === 'NS')) {
return false;
}
return (
typeof window !== 'undefined' &&
typeof document !== 'undefined'
);
}
/**
* Iterate over an Array or an Object invoking a function for each item.
*
* If `obj` is an Array callback will be called passing
* the value, index, and complete array for each item.
*
* If 'obj' is an Object callback will be called passing
* the value, key, and complete object for each property.
*
* @param {Object|Array} obj The object to iterate
* @param {Function} fn The callback to invoke for each item
*/
function forEach(obj, fn) {
// Don't bother if no value provided
if (obj === null || typeof obj === 'undefined') {
return;
}
// Force an array if not already something iterable
if (typeof obj !== 'object') {
/*eslint no-param-reassign:0*/
obj = [obj];
}
if (isArray(obj)) {
// Iterate over array values
for (var i = 0, l = obj.length; i < l; i++) {
fn.call(null, obj[i], i, obj);
}
} else {
// Iterate over object keys
for (var key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
fn.call(null, obj[key], key, obj);
}
}
}
}
/**
* Accepts varargs expecting each argument to be an object, then
* immutably merges the properties of each object and returns result.
*
* When multiple objects contain the same key the later object in
* the arguments list will take precedence.
*
* Example:
*
* ```js
* var result = merge({foo: 123}, {foo: 456});
* console.log(result.foo); // outputs 456
* ```
*
* @param {Object} obj1 Object to merge
* @returns {Object} Result of all merge properties
*/
function merge(/* obj1, obj2, obj3, ... */) {
var result = {};
function assignValue(val, key) {
if (isPlainObject(result[key]) && isPlainObject(val)) {
result[key] = merge(result[key], val);
} else if (isPlainObject(val)) {
result[key] = merge({}, val);
} else if (isArray(val)) {
result[key] = val.slice();
} else {
result[key] = val;
}
}
for (var i = 0, l = arguments.length; i < l; i++) {
forEach(arguments[i], assignValue);
}
return result;
}
/**
* Extends object a by mutably adding to it the properties of object b.
*
* @param {Object} a The object to be extended
* @param {Object} b The object to copy properties from
* @param {Object} thisArg The object to bind function to
* @return {Object} The resulting value of object a
*/
function extend(a, b, thisArg) {
forEach(b, function assignValue(val, key) {
if (thisArg && typeof val === 'function') {
a[key] = bind(val, thisArg);
} else {
a[key] = val;
}
});
return a;
}
/**
* Remove byte order marker. This catches EF BB BF (the UTF-8 BOM)
*
* @param {string} content with BOM
* @return {string} content value without BOM
*/
function stripBOM(content) {
if (content.charCodeAt(0) === 0xFEFF) {
content = content.slice(1);
}
return content;
}
/**
* Inherit the prototype methods from one constructor into another
* @param {function} constructor
* @param {function} superConstructor
* @param {object} [props]
* @param {object} [descriptors]
*/
function inherits(constructor, superConstructor, props, descriptors) {
constructor.prototype = Object.create(superConstructor.prototype, descriptors);
constructor.prototype.constructor = constructor;
props && Object.assign(constructor.prototype, props);
}
/**
* Resolve object with deep prototype chain to a flat object
* @param {Object} sourceObj source object
* @param {Object} [destObj]
* @param {Function} [filter]
* @returns {Object}
*/
function toFlatObject(sourceObj, destObj, filter) {
var props;
var i;
var prop;
var merged = {};
destObj = destObj || {};
do {
props = Object.getOwnPropertyNames(sourceObj);
i = props.length;
while (i-- > 0) {
prop = props[i];
if (!merged[prop]) {
destObj[prop] = sourceObj[prop];
merged[prop] = true;
}
}
sourceObj = Object.getPrototypeOf(sourceObj);
} while (sourceObj && (!filter || filter(sourceObj, destObj)) && sourceObj !== Object.prototype);
return destObj;
}
/*
* determines whether a string ends with the characters of a specified string
* @param {String} str
* @param {String} searchString
* @param {Number} [position= 0]
* @returns {boolean}
*/
function endsWith(str, searchString, position) {
str = String(str);
if (position === undefined || position > str.length) {
position = str.length;
}
position -= searchString.length;
var lastIndex = str.indexOf(searchString, position);
return lastIndex !== -1 && lastIndex === position;
}
/**
* Returns new array from array like object
* @param {*} [thing]
* @returns {Array}
*/
function toArray(thing) {
if (!thing) return null;
var i = thing.length;
if (isUndefined(i)) return null;
var arr = new Array(i);
while (i-- > 0) {
arr[i] = thing[i];
}
return arr;
}
// eslint-disable-next-line func-names
var isTypedArray = (function(TypedArray) {
// eslint-disable-next-line func-names
return function(thing) {
return TypedArray && thing instanceof TypedArray;
};
})(typeof Uint8Array !== 'undefined' && Object.getPrototypeOf(Uint8Array));
module.exports = {
isArray: isArray,
isArrayBuffer: isArrayBuffer,
isBuffer: isBuffer,
isFormData: isFormData,
isArrayBufferView: isArrayBufferView,
isString: isString,
isNumber: isNumber,
isObject: isObject,
isPlainObject: isPlainObject,
isUndefined: isUndefined,
isDate: isDate,
isFile: isFile,
isBlob: isBlob,
isFunction: isFunction,
isStream: isStream,
isURLSearchParams: isURLSearchParams,
isStandardBrowserEnv: isStandardBrowserEnv,
forEach: forEach,
merge: merge,
extend: extend,
trim: trim,
stripBOM: stripBOM,
inherits: inherits,
toFlatObject: toFlatObject,
kindOf: kindOf,
kindOfTest: kindOfTest,
endsWith: endsWith,
toArray: toArray,
isTypedArray: isTypedArray,
isFileList: isFileList
};