427 lines
10 KiB
JavaScript
427 lines
10 KiB
JavaScript
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// @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 =
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'-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz';
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const AUTO_ID_CHARS =
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'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
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const { hasOwnProperty } = Object;
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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(
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object: Object,
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path: string,
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joiner?: string = '/'
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): 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(
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object: Object,
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path: string,
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joiner?: string = '/'
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): 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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* Deep Check if obj1 keys are contained in obj2
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* @param obj1
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* @param obj2
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* @returns {boolean}
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*/
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export function areObjectKeysContainedInOther(
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obj1: Object,
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obj2: Object
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): boolean {
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if (!isObject(obj1) || !isObject(obj2)) {
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return false;
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}
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const keys1 = Object.keys(obj1);
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const keys2 = Object.keys(obj2);
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if (isArrayContainedInOther(keys1, keys2)) {
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return keys1
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.filter(key => isObject(obj1[key]))
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.reduce(
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(acc, cur) =>
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acc && areObjectKeysContainedInOther(obj1[cur], obj2[cur]),
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true
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);
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}
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return false;
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}
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/**
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* Check if arr1 is contained in arr2
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* @param arr1
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* @param arr2
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* @returns {boolean}
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*/
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export function isArrayContainedInOther(
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arr1: Array<*>,
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arr2: Array<*>
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): boolean {
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if (!Array.isArray(arr1) || !Array.isArray(arr2)) {
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return false;
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}
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return arr1.reduce((acc, cur) => acc && arr2.includes(cur), true);
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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: mixed): boolean %checks {
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return item
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? typeof item === 'object' && !Array.isArray(item) && item !== null
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: false;
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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?: mixed): boolean %checks {
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return item ? typeof item === 'function' : false;
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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: mixed): boolean %checks {
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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: mixed): 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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/**
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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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// * 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)
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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(
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code: string,
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message: string,
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additionalProps?: Object = {}
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) {
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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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*
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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(
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promise: Promise<*>,
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optionalCallback?: Function
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): Promise<*> {
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if (!isFunction(optionalCallback)) return promise;
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return promise
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.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 && optionalCallback.length === 1) {
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optionalCallback(null);
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} else if (optionalCallback) {
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optionalCallback(null, result);
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}
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return Promise.resolve(result);
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})
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.catch(error => {
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if (optionalCallback) optionalCallback(error);
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return Promise.reject(error);
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});
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}
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/**
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* Generate a firestore auto id for use with collection/document .add()
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* @return {string}
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*/
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export function firestoreAutoId(): string {
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let autoId = '';
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for (let i = 0; i < 20; i++) {
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autoId += AUTO_ID_CHARS.charAt(
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Math.floor(Math.random() * AUTO_ID_CHARS.length)
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);
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}
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return autoId;
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}
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