Current File : //home/silvzytp/calling_code/node_modules/axios/lib/utils.js
'use strict';
import bind from './helpers/bind.js';
// utils is a library of generic helper functions non-specific to axios
const {toString} = Object.prototype;
const {getPrototypeOf} = Object;
const kindOf = (cache => thing => {
const str = toString.call(thing);
return cache[str] || (cache[str] = str.slice(8, -1).toLowerCase());
})(Object.create(null));
const kindOfTest = (type) => {
type = type.toLowerCase();
return (thing) => kindOf(thing) === type
}
const typeOfTest = type => thing => typeof 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
*/
const {isArray} = Array;
/**
* Determine if a value is undefined
*
* @param {*} val The value to test
*
* @returns {boolean} True if the value is undefined, otherwise false
*/
const isUndefined = typeOfTest('undefined');
/**
* Determine if a value is a Buffer
*
* @param {*} 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)
&& isFunction(val.constructor.isBuffer) && val.constructor.isBuffer(val);
}
/**
* Determine if a value is an ArrayBuffer
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is an ArrayBuffer, otherwise false
*/
const isArrayBuffer = kindOfTest('ArrayBuffer');
/**
* Determine if a value is a view on an ArrayBuffer
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a view on an ArrayBuffer, otherwise false
*/
function isArrayBufferView(val) {
let 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 {*} val The value to test
*
* @returns {boolean} True if value is a String, otherwise false
*/
const isString = typeOfTest('string');
/**
* Determine if a value is a Function
*
* @param {*} val The value to test
* @returns {boolean} True if value is a Function, otherwise false
*/
const isFunction = typeOfTest('function');
/**
* Determine if a value is a Number
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a Number, otherwise false
*/
const isNumber = typeOfTest('number');
/**
* Determine if a value is an Object
*
* @param {*} thing The value to test
*
* @returns {boolean} True if value is an Object, otherwise false
*/
const isObject = (thing) => thing !== null && typeof thing === 'object';
/**
* Determine if a value is a Boolean
*
* @param {*} thing The value to test
* @returns {boolean} True if value is a Boolean, otherwise false
*/
const isBoolean = thing => thing === true || thing === false;
/**
* Determine if a value is a plain Object
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a plain Object, otherwise false
*/
const isPlainObject = (val) => {
if (kindOf(val) !== 'object') {
return false;
}
const prototype = getPrototypeOf(val);
return (prototype === null || prototype === Object.prototype || Object.getPrototypeOf(prototype) === null) && !(Symbol.toStringTag in val) && !(Symbol.iterator in val);
}
/**
* Determine if a value is a Date
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a Date, otherwise false
*/
const isDate = kindOfTest('Date');
/**
* Determine if a value is a File
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a File, otherwise false
*/
const isFile = kindOfTest('File');
/**
* Determine if a value is a Blob
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a Blob, otherwise false
*/
const isBlob = kindOfTest('Blob');
/**
* Determine if a value is a FileList
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a File, otherwise false
*/
const isFileList = kindOfTest('FileList');
/**
* Determine if a value is a Stream
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a Stream, otherwise false
*/
const isStream = (val) => isObject(val) && isFunction(val.pipe);
/**
* Determine if a value is a FormData
*
* @param {*} thing The value to test
*
* @returns {boolean} True if value is an FormData, otherwise false
*/
const isFormData = (thing) => {
const 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
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a URLSearchParams object, otherwise false
*/
const 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
*/
const trim = (str) => str.trim ?
str.trim() : str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
/**
* 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
*
* @param {Boolean} [allOwnKeys = false]
* @returns {any}
*/
function forEach(obj, fn, {allOwnKeys = false} = {}) {
// Don't bother if no value provided
if (obj === null || typeof obj === 'undefined') {
return;
}
let i;
let l;
// 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 (i = 0, l = obj.length; i < l; i++) {
fn.call(null, obj[i], i, obj);
}
} else {
// Iterate over object keys
const keys = allOwnKeys ? Object.getOwnPropertyNames(obj) : Object.keys(obj);
const len = keys.length;
let key;
for (i = 0; i < len; i++) {
key = keys[i];
fn.call(null, obj[key], key, obj);
}
}
}
function findKey(obj, key) {
key = key.toLowerCase();
const keys = Object.keys(obj);
let i = keys.length;
let _key;
while (i-- > 0) {
_key = keys[i];
if (key === _key.toLowerCase()) {
return _key;
}
}
return null;
}
const _global = typeof self === "undefined" ? typeof global === "undefined" ? this : global : self;
const isContextDefined = (context) => !isUndefined(context) && context !== _global;
/**
* 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, ... */) {
const {caseless} = isContextDefined(this) && this || {};
const result = {};
const assignValue = (val, key) => {
const targetKey = caseless && findKey(result, key) || key;
if (isPlainObject(result[targetKey]) && isPlainObject(val)) {
result[targetKey] = merge(result[targetKey], val);
} else if (isPlainObject(val)) {
result[targetKey] = merge({}, val);
} else if (isArray(val)) {
result[targetKey] = val.slice();
} else {
result[targetKey] = val;
}
}
for (let i = 0, l = arguments.length; i < l; i++) {
arguments[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
*
* @param {Boolean} [allOwnKeys]
* @returns {Object} The resulting value of object a
*/
const extend = (a, b, thisArg, {allOwnKeys}= {}) => {
forEach(b, (val, key) => {
if (thisArg && isFunction(val)) {
a[key] = bind(val, thisArg);
} else {
a[key] = val;
}
}, {allOwnKeys});
return a;
}
/**
* Remove byte order marker. This catches EF BB BF (the UTF-8 BOM)
*
* @param {string} content with BOM
*
* @returns {string} content value without BOM
*/
const 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]
*
* @returns {void}
*/
const inherits = (constructor, superConstructor, props, descriptors) => {
constructor.prototype = Object.create(superConstructor.prototype, descriptors);
constructor.prototype.constructor = constructor;
Object.defineProperty(constructor, 'super', {
value: superConstructor.prototype
});
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|Boolean} [filter]
* @param {Function} [propFilter]
*
* @returns {Object}
*/
const toFlatObject = (sourceObj, destObj, filter, propFilter) => {
let props;
let i;
let prop;
const merged = {};
destObj = destObj || {};
// eslint-disable-next-line no-eq-null,eqeqeq
if (sourceObj == null) return destObj;
do {
props = Object.getOwnPropertyNames(sourceObj);
i = props.length;
while (i-- > 0) {
prop = props[i];
if ((!propFilter || propFilter(prop, sourceObj, destObj)) && !merged[prop]) {
destObj[prop] = sourceObj[prop];
merged[prop] = true;
}
}
sourceObj = filter !== false && 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}
*/
const endsWith = (str, searchString, position) => {
str = String(str);
if (position === undefined || position > str.length) {
position = str.length;
}
position -= searchString.length;
const lastIndex = str.indexOf(searchString, position);
return lastIndex !== -1 && lastIndex === position;
}
/**
* Returns new array from array like object or null if failed
*
* @param {*} [thing]
*
* @returns {?Array}
*/
const toArray = (thing) => {
if (!thing) return null;
if (isArray(thing)) return thing;
let i = thing.length;
if (!isNumber(i)) return null;
const arr = new Array(i);
while (i-- > 0) {
arr[i] = thing[i];
}
return arr;
}
/**
* Checking if the Uint8Array exists and if it does, it returns a function that checks if the
* thing passed in is an instance of Uint8Array
*
* @param {TypedArray}
*
* @returns {Array}
*/
// eslint-disable-next-line func-names
const isTypedArray = (TypedArray => {
// eslint-disable-next-line func-names
return thing => {
return TypedArray && thing instanceof TypedArray;
};
})(typeof Uint8Array !== 'undefined' && getPrototypeOf(Uint8Array));
/**
* For each entry in the object, call the function with the key and value.
*
* @param {Object<any, any>} obj - The object to iterate over.
* @param {Function} fn - The function to call for each entry.
*
* @returns {void}
*/
const forEachEntry = (obj, fn) => {
const generator = obj && obj[Symbol.iterator];
const iterator = generator.call(obj);
let result;
while ((result = iterator.next()) && !result.done) {
const pair = result.value;
fn.call(obj, pair[0], pair[1]);
}
}
/**
* It takes a regular expression and a string, and returns an array of all the matches
*
* @param {string} regExp - The regular expression to match against.
* @param {string} str - The string to search.
*
* @returns {Array<boolean>}
*/
const matchAll = (regExp, str) => {
let matches;
const arr = [];
while ((matches = regExp.exec(str)) !== null) {
arr.push(matches);
}
return arr;
}
/* Checking if the kindOfTest function returns true when passed an HTMLFormElement. */
const isHTMLForm = kindOfTest('HTMLFormElement');
const toCamelCase = str => {
return str.toLowerCase().replace(/[_-\s]([a-z\d])(\w*)/g,
function replacer(m, p1, p2) {
return p1.toUpperCase() + p2;
}
);
};
/* Creating a function that will check if an object has a property. */
const hasOwnProperty = (({hasOwnProperty}) => (obj, prop) => hasOwnProperty.call(obj, prop))(Object.prototype);
/**
* Determine if a value is a RegExp object
*
* @param {*} val The value to test
*
* @returns {boolean} True if value is a RegExp object, otherwise false
*/
const isRegExp = kindOfTest('RegExp');
const reduceDescriptors = (obj, reducer) => {
const descriptors = Object.getOwnPropertyDescriptors(obj);
const reducedDescriptors = {};
forEach(descriptors, (descriptor, name) => {
if (reducer(descriptor, name, obj) !== false) {
reducedDescriptors[name] = descriptor;
}
});
Object.defineProperties(obj, reducedDescriptors);
}
/**
* Makes all methods read-only
* @param {Object} obj
*/
const freezeMethods = (obj) => {
reduceDescriptors(obj, (descriptor, name) => {
// skip restricted props in strict mode
if (isFunction(obj) && ['arguments', 'caller', 'callee'].indexOf(name) !== -1) {
return false;
}
const value = obj[name];
if (!isFunction(value)) return;
descriptor.enumerable = false;
if ('writable' in descriptor) {
descriptor.writable = false;
return;
}
if (!descriptor.set) {
descriptor.set = () => {
throw Error('Can not rewrite read-only method \'' + name + '\'');
};
}
});
}
const toObjectSet = (arrayOrString, delimiter) => {
const obj = {};
const define = (arr) => {
arr.forEach(value => {
obj[value] = true;
});
}
isArray(arrayOrString) ? define(arrayOrString) : define(String(arrayOrString).split(delimiter));
return obj;
}
const noop = () => {}
const toFiniteNumber = (value, defaultValue) => {
value = +value;
return Number.isFinite(value) ? value : defaultValue;
}
const toJSONObject = (obj) => {
const stack = new Array(10);
const visit = (source, i) => {
if (isObject(source)) {
if (stack.indexOf(source) >= 0) {
return;
}
if(!('toJSON' in source)) {
stack[i] = source;
const target = isArray(source) ? [] : {};
forEach(source, (value, key) => {
const reducedValue = visit(value, i + 1);
!isUndefined(reducedValue) && (target[key] = reducedValue);
});
stack[i] = undefined;
return target;
}
}
return source;
}
return visit(obj, 0);
}
export default {
isArray,
isArrayBuffer,
isBuffer,
isFormData,
isArrayBufferView,
isString,
isNumber,
isBoolean,
isObject,
isPlainObject,
isUndefined,
isDate,
isFile,
isBlob,
isRegExp,
isFunction,
isStream,
isURLSearchParams,
isTypedArray,
isFileList,
forEach,
merge,
extend,
trim,
stripBOM,
inherits,
toFlatObject,
kindOf,
kindOfTest,
endsWith,
toArray,
forEachEntry,
matchAll,
isHTMLForm,
hasOwnProperty,
hasOwnProp: hasOwnProperty, // an alias to avoid ESLint no-prototype-builtins detection
reduceDescriptors,
freezeMethods,
toObjectSet,
toCamelCase,
noop,
toFiniteNumber,
findKey,
global: _global,
isContextDefined,
toJSONObject
};
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