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import base64encode from '../base64';
import Util from '../util';
/** Merges multiple objects into the target argument.
*
* For properties that are plain Objects, performs a deep-merge. For the
* rest it just copies the value of the property.
*
* To extend prototypes use it as following:
* Pusher.Util.extend(Target.prototype, Base.prototype)
*
* You can also use it to merge objects without altering them:
* Pusher.Util.extend({}, object1, object2)
*
* @param {Object} target
* @return {Object} the target argument
*/
export function extend<T>(target: any, ...sources: any[]): T {
for (var i = 0; i < sources.length; i++) {
var extensions = sources[i];
for (var property in extensions) {
if (
extensions[property] &&
extensions[property].constructor &&
extensions[property].constructor === Object
) {
target[property] = extend(target[property] || {}, extensions[property]);
} else {
target[property] = extensions[property];
}
}
}
return target;
}
export function stringify(): string {
var m = ['Pusher'];
for (var i = 0; i < arguments.length; i++) {
if (typeof arguments[i] === 'string') {
m.push(arguments[i]);
} else {
m.push(safeJSONStringify(arguments[i]));
}
}
return m.join(' : ');
}
export function arrayIndexOf(array: any[], item: any): number {
// MSIE doesn't have array.indexOf
var nativeIndexOf = Array.prototype.indexOf;
if (array === null) {
return -1;
}
if (nativeIndexOf && array.indexOf === nativeIndexOf) {
return array.indexOf(item);
}
for (var i = 0, l = array.length; i < l; i++) {
if (array[i] === item) {
return i;
}
}
return -1;
}
/** Applies a function f to all properties of an object.
*
* Function f gets 3 arguments passed:
* - element from the object
* - key of the element
* - reference to the object
*
* @param {Object} object
* @param {Function} f
*/
export function objectApply(object: any, f: Function) {
for (var key in object) {
if (Object.prototype.hasOwnProperty.call(object, key)) {
f(object[key], key, object);
}
}
}
/** Return a list of objects own proerty keys
*
* @param {Object} object
* @returns {Array}
*/
export function keys(object: any): string[] {
var keys = [];
objectApply(object, function(_, key) {
keys.push(key);
});
return keys;
}
/** Return a list of object's own property values
*
* @param {Object} object
* @returns {Array}
*/
export function values(object: any): any[] {
var values = [];
objectApply(object, function(value) {
values.push(value);
});
return values;
}
/** Applies a function f to all elements of an array.
*
* Function f gets 3 arguments passed:
* - element from the array
* - index of the element
* - reference to the array
*
* @param {Array} array
* @param {Function} f
*/
export function apply(array: any[], f: Function, context?: any) {
for (var i = 0; i < array.length; i++) {
f.call(context || global, array[i], i, array);
}
}
/** Maps all elements of the array and returns the result.
*
* Function f gets 4 arguments passed:
* - element from the array
* - index of the element
* - reference to the source array
* - reference to the destination array
*
* @param {Array} array
* @param {Function} f
*/
export function map(array: any[], f: Function): any[] {
var result = [];
for (var i = 0; i < array.length; i++) {
result.push(f(array[i], i, array, result));
}
return result;
}
/** Maps all elements of the object and returns the result.
*
* Function f gets 4 arguments passed:
* - element from the object
* - key of the element
* - reference to the source object
* - reference to the destination object
*
* @param {Object} object
* @param {Function} f
*/
export function mapObject(object: any, f: Function): any {
var result = {};
objectApply(object, function(value, key) {
result[key] = f(value);
});
return result;
}
/** Filters elements of the array using a test function.
*
* Function test gets 4 arguments passed:
* - element from the array
* - index of the element
* - reference to the source array
* - reference to the destination array
*
* @param {Array} array
* @param {Function} f
*/
export function filter(array: any[], test: Function): any[] {
test =
test ||
function(value) {
return !!value;
};
var result = [];
for (var i = 0; i < array.length; i++) {
if (test(array[i], i, array, result)) {
result.push(array[i]);
}
}
return result;
}
/** Filters properties of the object using a test function.
*
* Function test gets 4 arguments passed:
* - element from the object
* - key of the element
* - reference to the source object
* - reference to the destination object
*
* @param {Object} object
* @param {Function} f
*/
export function filterObject(object: Object, test: Function) {
var result = {};
objectApply(object, function(value, key) {
if ((test && test(value, key, object, result)) || Boolean(value)) {
result[key] = value;
}
});
return result;
}
/** Flattens an object into a two-dimensional array.
*
* @param {Object} object
* @return {Array} resulting array of [key, value] pairs
*/
export function flatten(object: Object): any[] {
var result = [];
objectApply(object, function(value, key) {
result.push([key, value]);
});
return result;
}
/** Checks whether any element of the array passes the test.
*
* Function test gets 3 arguments passed:
* - element from the array
* - index of the element
* - reference to the source array
*
* @param {Array} array
* @param {Function} f
*/
export function any(array: any[], test: Function): boolean {
for (var i = 0; i < array.length; i++) {
if (test(array[i], i, array)) {
return true;
}
}
return false;
}
/** Checks whether all elements of the array pass the test.
*
* Function test gets 3 arguments passed:
* - element from the array
* - index of the element
* - reference to the source array
*
* @param {Array} array
* @param {Function} f
*/
export function all(array: any[], test: Function): boolean {
for (var i = 0; i < array.length; i++) {
if (!test(array[i], i, array)) {
return false;
}
}
return true;
}
export function encodeParamsObject(data): string {
return mapObject(data, function(value) {
if (typeof value === 'object') {
value = safeJSONStringify(value);
}
return encodeURIComponent(base64encode(value.toString()));
});
}
export function buildQueryString(data: any): string {
var params = filterObject(data, function(value) {
return value !== undefined;
});
var query = map(
flatten(encodeParamsObject(params)),
Util.method('join', '=')
).join('&');
return query;
}
/**
* See https://github.com/douglascrockford/JSON-js/blob/master/cycle.js
*
* Remove circular references from an object. Required for JSON.stringify in
* React Native, which tends to blow up a lot.
*
* @param {any} object
* @return {any} Decycled object
*/
export function decycleObject(object: any): any {
var objects = [],
paths = [];
return (function derez(value, path) {
var i, name, nu;
switch (typeof value) {
case 'object':
if (!value) {
return null;
}
for (i = 0; i < objects.length; i += 1) {
if (objects[i] === value) {
return { $ref: paths[i] };
}
}
objects.push(value);
paths.push(path);
if (Object.prototype.toString.apply(value) === '[object Array]') {
nu = [];
for (i = 0; i < value.length; i += 1) {
nu[i] = derez(value[i], path + '[' + i + ']');
}
} else {
nu = {};
for (name in value) {
if (Object.prototype.hasOwnProperty.call(value, name)) {
nu[name] = derez(
value[name],
path + '[' + JSON.stringify(name) + ']'
);
}
}
}
return nu;
case 'number':
case 'string':
case 'boolean':
return value;
}
})(object, '$');
}
/**
* Provides a cross-browser and cross-platform way to safely stringify objects
* into JSON. This is particularly necessary for ReactNative, where circular JSON
* structures throw an exception.
*
* @param {any} source The object to stringify
* @return {string} The serialized output.
*/
export function safeJSONStringify(source: any): string {
try {
return JSON.stringify(source);
} catch (e) {
return JSON.stringify(decycleObject(source));
}
}