-import { v4 as uuid } from 'uuid';
+import crypto from 'crypto';
+
+import { WebSocketCloseEventStatusString } from '../types/WebSocket';
export default class Utils {
- static generateUUID(): string {
- return uuid();
+ private constructor() {
+ // This is intentional
}
- static async sleep(milliSeconds: number): Promise<NodeJS.Timeout> {
- return new Promise((resolve) => setTimeout(resolve, milliSeconds));
+ public static logPrefix(prefixString = ''): string {
+ return new Date().toLocaleString() + prefixString;
}
- static secondsToHHMMSS(seconds: number): string {
- return new Date(seconds * 1000).toISOString().substr(11, 8);
+ public static generateUUID(): string {
+ return crypto.randomUUID();
}
- static milliSecondsToHHMMSS(milliSeconds: number): string {
- return new Date(milliSeconds).toISOString().substr(11, 8);
+ public static validateUUID(uuid: string): boolean {
+ return /\/^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$\/i/.test(uuid);
}
- static removeExtraEmptyLines(tab): void {
- // Start from the end
- for (let i = tab.length - 1; i > 0; i--) {
- // Two consecutive empty lines?
- if (tab[i].length === 0 && tab[i - 1].length === 0) {
- // Remove the last one
- tab.splice(i, 1);
- }
- // Check last line
- if (i === 1 && tab[i - 1].length === 0) {
- // Remove the first one
- tab.splice(i - 1, 1);
- }
+ public static async sleep(milliSeconds: number): Promise<NodeJS.Timeout> {
+ return new Promise((resolve) => setTimeout(resolve as () => void, milliSeconds));
+ }
+
+ public static formatDurationMilliSeconds(duration: number): string {
+ duration = Utils.convertToInt(duration);
+ const hours = Math.floor(duration / (3600 * 1000));
+ const minutes = Math.floor((duration / 1000 - hours * 3600) / 60);
+ const seconds = duration / 1000 - hours * 3600 - minutes * 60;
+ let hoursStr = hours.toString();
+ let minutesStr = minutes.toString();
+ let secondsStr = seconds.toString();
+
+ if (hours < 10) {
+ hoursStr = '0' + hours.toString();
}
+ if (minutes < 10) {
+ minutesStr = '0' + minutes.toString();
+ }
+ if (seconds < 10) {
+ secondsStr = '0' + seconds.toString();
+ }
+ return hoursStr + ':' + minutesStr + ':' + secondsStr.substring(0, 6);
}
- static convertToDate(value): Date {
+ public static formatDurationSeconds(duration: number): string {
+ return Utils.formatDurationMilliSeconds(duration * 1000);
+ }
+
+ public static convertToDate(value: unknown): Date {
// Check
if (!value) {
- return value;
+ return value as Date;
}
// Check Type
if (!(value instanceof Date)) {
- return new Date(value);
+ return new Date(value as string);
}
return value;
}
- static convertToInt(value): number {
- let changedValue = value;
+ public static convertToInt(value: unknown): number {
+ let changedValue: number = value as number;
if (!value) {
return 0;
}
if (Number.isSafeInteger(value)) {
- return value;
+ return value as number;
}
// Check
- if (typeof value === 'string') {
+ if (Utils.isString(value)) {
// Create Object
- changedValue = parseInt(value);
+ changedValue = parseInt(value as string);
}
return changedValue;
}
- static convertToFloat(value): number {
- let changedValue = value;
+ public static convertToFloat(value: unknown): number {
+ let changedValue: number = value as number;
if (!value) {
return 0;
}
// Check
- if (typeof value === 'string') {
+ if (Utils.isString(value)) {
// Create Object
- changedValue = parseFloat(value);
+ changedValue = parseFloat(value as string);
}
return changedValue;
}
- static convertToBoolean(value): boolean {
+ public static convertToBoolean(value: unknown): boolean {
let result = false;
// Check boolean
if (value) {
result = value;
} else {
// Convert
- result = (value === 'true');
+ result = value === 'true';
}
}
return result;
}
- static getRandomFloat(max: number, min = 0): number {
- return Math.random() < 0.5 ? (1 - Math.random()) * (max - min) + min : Math.random() * (max - min) + min;
+ public static getRandomFloat(max = Number.MAX_VALUE, min = 0, negative = false): number {
+ if (max < min || max < 0 || min < 0) {
+ throw new RangeError('Invalid interval');
+ }
+ const randomPositiveFloat = crypto.randomBytes(4).readUInt32LE() / 0xffffffff;
+ const sign = negative && randomPositiveFloat < 0.5 ? -1 : 1;
+ return sign * (randomPositiveFloat * (max - min) + min);
}
- static getRandomInt(max: number, min = 0): number {
- if (min) {
- return Math.floor(Math.random() * (max - min + 1) + min);
+ public static getRandomInteger(max = Number.MAX_SAFE_INTEGER, min = 0): number {
+ if (max < min || max < 0 || min < 0) {
+ throw new RangeError('Invalid interval');
+ }
+ max = Math.floor(max);
+ if (!Utils.isNullOrUndefined(min) && min !== 0) {
+ min = Math.ceil(min);
+ return Math.floor(Utils.secureRandom() * (max - min + 1)) + min;
}
- return Math.floor(Math.random() * max + 1);
+ return Math.floor(Utils.secureRandom() * (max + 1));
}
- static roundTo(number: number, scale: number): number {
+ public static roundTo(numberValue: number, scale: number): number {
const roundPower = Math.pow(10, scale);
- return Math.round(number * roundPower) / roundPower;
+ return Math.round(numberValue * roundPower) / roundPower;
+ }
+
+ public static truncTo(numberValue: number, scale: number): number {
+ const truncPower = Math.pow(10, scale);
+ return Math.trunc(numberValue * truncPower) / truncPower;
}
- static getRandomFloatRounded(max: number, min = 0, scale = 2): number {
+ public static getRandomFloatRounded(max = Number.MAX_VALUE, min = 0, scale = 2): number {
if (min) {
return Utils.roundTo(Utils.getRandomFloat(max, min), scale);
}
return Utils.roundTo(Utils.getRandomFloat(max), scale);
}
- static logPrefix(prefixString = ''): string {
- const date = new Date();
- return date.toLocaleString() + prefixString;
+ public static getRandomFloatFluctuatedRounded(
+ staticValue: number,
+ fluctuationPercent: number,
+ scale = 2
+ ): number {
+ if (fluctuationPercent === 0) {
+ return Utils.roundTo(staticValue, scale);
+ }
+ const fluctuationRatio = fluctuationPercent / 100;
+ return Utils.getRandomFloatRounded(
+ staticValue * (1 + fluctuationRatio),
+ staticValue * (1 - fluctuationRatio),
+ scale
+ );
}
- static cloneObject(object) {
- return JSON.parse(JSON.stringify(object));
+ public static cloneObject<T>(object: T): T {
+ return JSON.parse(JSON.stringify(object)) as T;
}
- static isIterable(obj): boolean {
- if (obj) {
- return typeof obj[Symbol.iterator] === 'function';
- }
- return false;
+ public static isIterable<T>(obj: T): boolean {
+ return obj ? typeof obj[Symbol.iterator] === 'function' : false;
}
- static isEmptyJSon(document): boolean {
- // Empty?
- if (!document) {
- return true;
- }
- // Check type
- if (typeof document !== 'object') {
- return true;
- }
- // Check
- return Object.keys(document).length === 0;
+ public static isString(value: unknown): boolean {
+ return typeof value === 'string';
}
- static isString(value): boolean {
- return typeof value === 'string';
+ public static isEmptyString(value: unknown): boolean {
+ return Utils.isString(value) && (value as string).length === 0;
}
- static isUndefined(value): boolean {
+ public static isUndefined(value: unknown): boolean {
return typeof value === 'undefined';
}
- static isNullOrUndefined(value): boolean {
- // eslint-disable-next-line no-eq-null
- if (value == null) {
- return true;
- }
- return false;
+ public static isNullOrUndefined(value: unknown): boolean {
+ // eslint-disable-next-line eqeqeq, no-eq-null
+ return value == null ? true : false;
}
- static isEmptyArray(object): boolean {
+ public static isEmptyArray(object: unknown): boolean {
if (!object) {
return true;
}
- if (Array.isArray(object) && object.length > 0) {
+ if (Array.isArray(object) === true && (object as unknown[]).length > 0) {
return false;
}
return true;
}
- static isEmptyObject(obj): boolean {
+ public static isEmptyObject(obj: object): boolean {
return !Object.keys(obj).length;
}
- static insertAt = (str: string, subStr: string, pos: number): string => `${str.slice(0, pos)}${subStr}${str.slice(pos)}`;
+ public static insertAt = (str: string, subStr: string, pos: number): string =>
+ `${str.slice(0, pos)}${subStr}${str.slice(pos)}`;
/**
- * @param {number} [retryNumber=0]
- * @return {number} - delay in milliseconds
+ * @param [retryNumber=0]
+ * @returns delay in milliseconds
*/
- static exponentialDelay(retryNumber = 0): number {
+ public static exponentialDelay(retryNumber = 0): number {
const delay = Math.pow(2, retryNumber) * 100;
- const randomSum = delay * 0.2 * Math.random(); // 0-20% of the delay
+ const randomSum = delay * 0.2 * Utils.secureRandom(); // 0-20% of the delay
return delay + randomSum;
}
+
+ public static async promiseWithTimeout<T>(
+ promise: Promise<T>,
+ timeoutMs: number,
+ timeoutError: Error,
+ timeoutCallback: () => void = () => {
+ /* This is intentional */
+ }
+ ): Promise<T> {
+ // Create a timeout promise that rejects in timeout milliseconds
+ const timeoutPromise = new Promise<never>((_, reject) => {
+ setTimeout(() => {
+ timeoutCallback();
+ reject(timeoutError);
+ }, timeoutMs);
+ });
+
+ // Returns a race between timeout promise and the passed promise
+ return Promise.race<T>([promise, timeoutPromise]);
+ }
+
+ /**
+ * Generate a cryptographically secure random number in the [0,1[ range
+ *
+ * @returns
+ */
+ public static secureRandom(): number {
+ return crypto.randomBytes(4).readUInt32LE() / 0x100000000;
+ }
+
+ public static JSONStringifyWithMapSupport(
+ obj: Record<string, unknown> | Record<string, unknown>[],
+ space?: number
+ ): string {
+ return JSON.stringify(
+ obj,
+ (key, value: Record<string, unknown>) => {
+ if (value instanceof Map) {
+ return {
+ dataType: 'Map',
+ value: [...value],
+ };
+ }
+ return value;
+ },
+ space
+ );
+ }
+
+ /**
+ * Convert websocket error code to human readable string message
+ *
+ * @param code websocket error code
+ * @returns human readable string message
+ */
+ public static getWebSocketCloseEventStatusString(code: number): string {
+ if (code >= 0 && code <= 999) {
+ return '(Unused)';
+ } else if (code >= 1016) {
+ if (code <= 1999) {
+ return '(For WebSocket standard)';
+ } else if (code <= 2999) {
+ return '(For WebSocket extensions)';
+ } else if (code <= 3999) {
+ return '(For libraries and frameworks)';
+ } else if (code <= 4999) {
+ return '(For applications)';
+ }
+ }
+ if (!Utils.isUndefined(WebSocketCloseEventStatusString[code])) {
+ return WebSocketCloseEventStatusString[code] as string;
+ }
+ return '(Unknown)';
+ }
}
repositories / e-mobility-charging-stations-simulator.git / blobdiff