377 lines
9.2 KiB
JavaScript
377 lines
9.2 KiB
JavaScript
// @flow
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import { Platform } from 'react-native';
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// todo cleanup unused utilities from legacy code
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// modeled after base64 web-safe chars, but ordered by ASCII
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const PUSH_CHARS = '-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz';
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const hasOwnProperty = Object.hasOwnProperty;
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// const DEFAULT_CHUNK_SIZE = 50;
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/**
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* Deep get a value from an object.
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* @website https://github.com/Salakar/deeps
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* @param object
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* @param path
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* @param joiner
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* @returns {*}
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*/
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export function deepGet(object: Object,
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path: string,
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joiner?: string = '/'): any {
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const keys = path.split(joiner);
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let i = 0;
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let tmp = object;
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const len = keys.length;
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while (i < len) {
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const key = keys[i++];
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if (!tmp || !hasOwnProperty.call(tmp, key)) return null;
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tmp = tmp[key];
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}
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return tmp;
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}
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/**
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* Deep check if a key exists.
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* @website https://github.com/Salakar/deeps
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* @param object
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* @param path
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* @param joiner
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* @returns {*}
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*/
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export function deepExists(object: Object,
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path: string,
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joiner?: string = '/'): boolean {
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const keys = path.split(joiner);
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let i = 0;
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let tmp = object;
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const len = keys.length;
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while (i < len) {
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const key = keys[i++];
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if (!tmp || !hasOwnProperty.call(tmp, key)) return false;
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tmp = tmp[key];
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}
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return tmp !== undefined;
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}
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/**
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* Simple is object check.
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* @param item
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* @returns {boolean}
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*/
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export function isObject(item: any): boolean {
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return (item && typeof item === 'object' && !Array.isArray(item) && item !== null);
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}
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/**
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* Simple is function check
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* @param item
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* @returns {*|boolean}
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*/
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export function isFunction(item?: any): boolean {
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return Boolean(item && typeof item === 'function');
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}
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/**
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* Simple is string check
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* @param value
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* @return {boolean}
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*/
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export function isString(value: any): boolean {
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return typeof value === 'string';
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}
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// platform checks
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export const isIOS = Platform.OS === 'ios';
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export const isAndroid = Platform.OS === 'android';
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/**
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*
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* @param string
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* @returns {*}
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*/
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export function tryJSONParse(string: string | null): any {
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try {
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return string && JSON.parse(string);
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} catch (jsonError) {
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return string;
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}
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}
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/**
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*
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* @param data
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* @returns {*}
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*/
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export function tryJSONStringify(data: any): string | null {
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try {
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return JSON.stringify(data);
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} catch (jsonError) {
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return null;
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}
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}
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// noinspection Eslint
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export const windowOrGlobal = (typeof self === 'object' && self.self === self && self) || (typeof global === 'object' && global.global === global && global) || this;
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/**
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* No operation func
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*/
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export function noop(): void {
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}
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// /**
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// * Delays chunks based on sizes per event loop.
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// * @param collection
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// * @param chunkSize
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// * @param operation
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// * @param callback
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// * @private
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// */
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// function _delayChunk(collection: Array<*>,
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// chunkSize: number,
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// operation: Function,
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// callback: Function): void {
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// const length = collection.length;
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// const iterations = Math.ceil(length / chunkSize);
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//
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// // noinspection ES6ConvertVarToLetConst
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// let thisIteration = 0;
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//
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// setImmediate(function next() {
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// const start = thisIteration * chunkSize;
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// const _end = start + chunkSize;
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// const end = _end >= length ? length : _end;
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// const result = operation(collection.slice(start, end), start, end);
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//
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// if (thisIteration++ > iterations) {
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// callback(null, result);
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// } else {
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// setImmediate(next);
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// }
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// });
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// }
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//
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// /**
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// * Async each with optional chunk size limit
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// * @param array
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// * @param chunkSize
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// * @param iterator
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// * @param cb
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// */
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// export function each(array: Array<*>,
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// chunkSize: number | Function,
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// iterator: Function,
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// cb?: Function): void {
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// if (typeof chunkSize === 'function') {
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// cb = iterator;
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// iterator = chunkSize;
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// chunkSize = DEFAULT_CHUNK_SIZE;
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// }
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//
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// if (cb) {
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// _delayChunk(array, chunkSize, (slice, start) => {
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// for (let ii = 0, jj = slice.length; ii < jj; ii += 1) {
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// iterator(slice[ii], start + ii);
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// }
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// }, cb);
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// }
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// }
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/**
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* Returns a string typeof that's valid for Firebase usage
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* @param value
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* @return {*}
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*/
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export function typeOf(value: any): string {
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if (value === null) return 'null';
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if (Array.isArray(value)) return 'array';
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return typeof value;
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}
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// /**
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// * Async map with optional chunk size limit
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// * @param array
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// * @param chunkSize
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// * @param iterator
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// * @param cb
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// * @returns {*}
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// */
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// export function map(array: Array<*>,
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// chunkSize: number | Function,
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// iterator: Function,
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// cb?: Function): void {
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// if (typeof chunkSize === 'function') {
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// cb = iterator;
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// iterator = chunkSize;
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// chunkSize = DEFAULT_CHUNK_SIZE;
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// }
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//
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// const result = [];
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// _delayChunk(array, chunkSize, (slice, start) => {
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// for (let ii = 0, jj = slice.length; ii < jj; ii += 1) {
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// result.push(iterator(slice[ii], start + ii, array));
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// }
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// return result;
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// }, () => cb && cb(result));
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// }
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// /**
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// *
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// * @param string
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// * @return {string}
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// */
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// export function capitalizeFirstLetter(string: String) {
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// return `${string.charAt(0).toUpperCase()}${string.slice(1)}`;
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// }
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// timestamp of last push, used to prevent local collisions if you push twice in one ms.
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let lastPushTime = 0;
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// we generate 72-bits of randomness which get turned into 12 characters and appended to the
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// timestamp to prevent collisions with other clients. We store the last characters we
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// generated because in the event of a collision, we'll use those same characters except
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// "incremented" by one.
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const lastRandChars = [];
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/**
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* Generate a firebase id - for use with ref().push(val, cb) - e.g. -KXMr7k2tXUFQqiaZRY4'
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* @param serverTimeOffset - pass in server time offset from native side
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* @returns {string}
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*/
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export function generatePushID(serverTimeOffset?: number = 0): string {
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const timeStampChars = new Array(8);
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let now = new Date().getTime() + serverTimeOffset;
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const duplicateTime = (now === lastPushTime);
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lastPushTime = now;
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for (let i = 7; i >= 0; i -= 1) {
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timeStampChars[i] = PUSH_CHARS.charAt(now % 64);
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now = Math.floor(now / 64);
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}
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if (now !== 0) throw new Error('We should have converted the entire timestamp.');
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let id = timeStampChars.join('');
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if (!duplicateTime) {
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for (let i = 0; i < 12; i += 1) {
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lastRandChars[i] = Math.floor(Math.random() * 64);
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}
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} else {
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// if the timestamp hasn't changed since last push,
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// use the same random number, but increment it by 1.
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let i;
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for (i = 11; i >= 0 && lastRandChars[i] === 63; i -= 1) {
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lastRandChars[i] = 0;
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}
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lastRandChars[i] += 1;
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}
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for (let i = 0; i < 12; i++) {
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id += PUSH_CHARS.charAt(lastRandChars[i]);
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}
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if (id.length !== 20) throw new Error('Length should be 20.');
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return id;
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}
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/**
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* Converts a code and message from a native event to a JS Error
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* @param code
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* @param message
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* @param additionalProps
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* @returns {Error}
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*/
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export function nativeToJSError(code: string, message: string, additionalProps?: Object = {}) {
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const error: Object = new Error(message);
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error.code = code;
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Object.assign(error, additionalProps);
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// exclude this function from the stack
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const _stackArray = error.stack.split('\n');
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error.stack = _stackArray.splice(1, _stackArray.length).join('\n');
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return error;
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}
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/**
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* Prepends appName arg to all native method calls
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* @param appName
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* @param NativeModule
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*/
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export function nativeWithApp(appName: string, NativeModule: Object) {
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const native = {};
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const methods = Object.keys(NativeModule);
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for (let i = 0, len = methods.length; i < len; i++) {
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const method = methods[i];
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native[method] = (...args) => {
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return NativeModule[method](...[appName, ...args]);
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};
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}
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return native;
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}
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/**
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*
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* @param object
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* @return {string}
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*/
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export function objectToUniqueId(object: Object): string {
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if (!isObject(object) || object === null) return JSON.stringify(object);
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const keys = Object.keys(object).sort();
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let key = '{';
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for (let i = 0; i < keys.length; i++) {
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if (i !== 0) key += ',';
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key += JSON.stringify(keys[i]);
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key += ':';
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key += objectToUniqueId(object[keys[i]]);
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}
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key += '}';
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return key;
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}
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/**
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* Return the existing promise if no callback provided or
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* exec the promise and callback if optionalCallback is valid.
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*
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* @param promise
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* @param optionalCallback
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* @return {Promise}
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*/
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export function promiseOrCallback(promise: Promise<*>, optionalCallback?: Function) {
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if (!isFunction(optionalCallback)) return promise;
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return promise.then((result) => {
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// some of firebase internal tests & methods only check/return one arg
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// see https://github.com/firebase/firebase-js-sdk/blob/master/src/utils/promise.ts#L62
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if (optionalCallback.length === 1) {
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optionalCallback(null);
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} else {
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optionalCallback(null, result);
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}
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return Promise.resolve(result);
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}).catch((error) => {
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optionalCallback(error);
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return Promise.reject(error);
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});
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}
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