react-native-firebase/lib/utils/index.js

377 lines
9.2 KiB
JavaScript

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