src/utils/Utils.ts

   1 import { randomBytes, randomInt, randomUUID } from 'node:crypto';
   2 import { inspect } from 'node:util';
   3
   4 import {
   5   formatDuration,
   6   hoursToMinutes,
   7   hoursToSeconds,
   8   isDate,
   9   millisecondsToHours,
  10   millisecondsToMinutes,
  11   millisecondsToSeconds,
  12   minutesToSeconds,
  13   secondsToMilliseconds,
  14 } from 'date-fns';
  15 import clone from 'just-clone';
  16
  17 import { Constants } from './Constants';
  18 import { type TimestampedData, WebSocketCloseEventStatusString } from '../types';
  19
  20 export const logPrefix = (prefixString = ''): string => {
  21   return `${new Date().toLocaleString()}${prefixString}`;
  22 };
  23
  24 export const generateUUID = (): string => {
  25   return randomUUID();
  26 };
  27
  28 export const validateUUID = (uuid: string): boolean => {
  29   return /^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$/.test(
  30     uuid,
  31   );
  32 };
  33
  34 export const sleep = async (milliSeconds: number): Promise<NodeJS.Timeout> => {
  35   return new Promise<NodeJS.Timeout>((resolve) => setTimeout(resolve as () => void, milliSeconds));
  36 };
  37
  38 export const formatDurationMilliSeconds = (duration: number): string => {
  39   duration = convertToInt(duration);
  40   const days = Math.floor(duration / (24 * 3600 * 1000));
  41   const hours = Math.floor(millisecondsToHours(duration) - days * 24);
  42   const minutes = Math.floor(
  43     millisecondsToMinutes(duration) - days * 24 * 60 - hoursToMinutes(hours),
  44   );
  45   const seconds = Math.floor(
  46     millisecondsToSeconds(duration) -
  47       days * 24 * 3600 -
  48       hoursToSeconds(hours) -
  49       minutesToSeconds(minutes),
  50   );
  51   return formatDuration({
  52     days,
  53     hours,
  54     minutes,
  55     seconds,
  56   });
  57 };
  58
  59 export const formatDurationSeconds = (duration: number): string => {
  60   return formatDurationMilliSeconds(secondsToMilliseconds(duration));
  61 };
  62
  63 // More efficient date validation function than the one provided by date-fns
  64 export const isValidDate = (date: unknown): boolean => {
  65   if (typeof date === 'number') {
  66     return !isNaN(date);
  67   } else if (isDate(date)) {
  68     return !isNaN((date as Date).getTime());
  69   }
  70   return false;
  71 };
  72
  73 export const convertToDate = (
  74   value: Date | string | number | null | undefined,
  75 ): Date | null | undefined => {
  76   if (isNullOrUndefined(value)) {
  77     return value as null | undefined;
  78   }
  79   if (value instanceof Date) {
  80     return value;
  81   }
  82   if (isString(value) || typeof value === 'number') {
  83     return new Date(value!);
  84   }
  85   return null;
  86 };
  87
  88 export const convertToInt = (value: unknown): number => {
  89   if (!value) {
  90     return 0;
  91   }
  92   let changedValue: number = value as number;
  93   if (Number.isSafeInteger(value)) {
  94     return value as number;
  95   }
  96   if (typeof value === 'number') {
  97     return Math.trunc(value);
  98   }
  99   if (isString(value)) {
 100     changedValue = parseInt(value as string);
 101   }
 102   if (isNaN(changedValue)) {
 103     // eslint-disable-next-line @typescript-eslint/no-base-to-string
 104     throw new Error(`Cannot convert to integer: ${value.toString()}`);
 105   }
 106   return changedValue;
 107 };
 108
 109 export const convertToFloat = (value: unknown): number => {
 110   if (!value) {
 111     return 0;
 112   }
 113   let changedValue: number = value as number;
 114   if (isString(value)) {
 115     changedValue = parseFloat(value as string);
 116   }
 117   if (isNaN(changedValue)) {
 118     // eslint-disable-next-line @typescript-eslint/no-base-to-string
 119     throw new Error(`Cannot convert to float: ${value.toString()}`);
 120   }
 121   return changedValue;
 122 };
 123
 124 export const convertToBoolean = (value: unknown): boolean => {
 125   let result = false;
 126   if (value) {
 127     // Check the type
 128     if (typeof value === 'boolean') {
 129       return value;
 130     } else if (isString(value) && ((value as string).toLowerCase() === 'true' || value === '1')) {
 131       result = true;
 132     } else if (typeof value === 'number' && value === 1) {
 133       result = true;
 134     }
 135   }
 136   return result;
 137 };
 138
 139 export const getRandomFloat = (max = Number.MAX_VALUE, min = 0): number => {
 140   if (max < min) {
 141     throw new RangeError('Invalid interval');
 142   }
 143   if (max - min === Infinity) {
 144     throw new RangeError('Invalid interval');
 145   }
 146   return (randomBytes(4).readUInt32LE() / 0xffffffff) * (max - min) + min;
 147 };
 148
 149 export const getRandomInteger = (max = Constants.MAX_RANDOM_INTEGER, min = 0): number => {
 150   max = Math.floor(max);
 151   if (!isNullOrUndefined(min) && min !== 0) {
 152     min = Math.ceil(min);
 153     return Math.floor(randomInt(min, max + 1));
 154   }
 155   return Math.floor(randomInt(max + 1));
 156 };
 157
 158 /**
 159  * Rounds the given number to the given scale.
 160  * The rounding is done using the "round half away from zero" method.
 161  *
 162  * @param numberValue - The number to round.
 163  * @param scale - The scale to round to.
 164  * @returns The rounded number.
 165  */
 166 export const roundTo = (numberValue: number, scale: number): number => {
 167   const roundPower = Math.pow(10, scale);
 168   return Math.round(numberValue * roundPower * (1 + Number.EPSILON)) / roundPower;
 169 };
 170
 171 export const getRandomFloatRounded = (max = Number.MAX_VALUE, min = 0, scale = 2): number => {
 172   if (min) {
 173     return roundTo(getRandomFloat(max, min), scale);
 174   }
 175   return roundTo(getRandomFloat(max), scale);
 176 };
 177
 178 export const getRandomFloatFluctuatedRounded = (
 179   staticValue: number,
 180   fluctuationPercent: number,
 181   scale = 2,
 182 ): number => {
 183   if (fluctuationPercent < 0 || fluctuationPercent > 100) {
 184     throw new RangeError(
 185       `Fluctuation percent must be between 0 and 100. Actual value: ${fluctuationPercent}`,
 186     );
 187   }
 188   if (fluctuationPercent === 0) {
 189     return roundTo(staticValue, scale);
 190   }
 191   const fluctuationRatio = fluctuationPercent / 100;
 192   return getRandomFloatRounded(
 193     staticValue * (1 + fluctuationRatio),
 194     staticValue * (1 - fluctuationRatio),
 195     scale,
 196   );
 197 };
 198
 199 export const extractTimeSeriesValues = (timeSeries: Array<TimestampedData>): number[] => {
 200   return timeSeries.map((timeSeriesItem) => timeSeriesItem.value);
 201 };
 202
 203 export const isObject = (item: unknown): boolean => {
 204   return (
 205     isNullOrUndefined(item) === false && typeof item === 'object' && Array.isArray(item) === false
 206   );
 207 };
 208
 209 export const cloneObject = <T extends object>(object: T): T => {
 210   return clone<T>(object);
 211 };
 212
 213 export const hasOwnProp = (object: unknown, property: PropertyKey): boolean => {
 214   return isObject(object) && Object.hasOwn(object as object, property);
 215 };
 216
 217 export const isCFEnvironment = (): boolean => {
 218   return !isNullOrUndefined(process.env.VCAP_APPLICATION);
 219 };
 220
 221 export const isIterable = <T>(obj: T): boolean => {
 222   return !isNullOrUndefined(obj) ? typeof obj[Symbol.iterator as keyof T] === 'function' : false;
 223 };
 224
 225 const isString = (value: unknown): boolean => {
 226   return typeof value === 'string';
 227 };
 228
 229 export const isEmptyString = (value: unknown): boolean => {
 230   return isNullOrUndefined(value) || (isString(value) && (value as string).trim().length === 0);
 231 };
 232
 233 export const isNotEmptyString = (value: unknown): boolean => {
 234   return isString(value) && (value as string).trim().length > 0;
 235 };
 236
 237 export const isUndefined = (value: unknown): boolean => {
 238   return value === undefined;
 239 };
 240
 241 export const isNullOrUndefined = (value: unknown): boolean => {
 242   // eslint-disable-next-line eqeqeq, no-eq-null
 243   return value == null;
 244 };
 245
 246 export const isEmptyArray = (object: unknown): boolean => {
 247   return Array.isArray(object) && object.length === 0;
 248 };
 249
 250 export const isNotEmptyArray = (object: unknown): boolean => {
 251   return Array.isArray(object) && object.length > 0;
 252 };
 253
 254 export const isEmptyObject = (obj: object): boolean => {
 255   if (obj?.constructor !== Object) {
 256     return false;
 257   }
 258   // Iterates over the keys of an object, if
 259   // any exist, return false.
 260   for (const _ in obj) {
 261     return false;
 262   }
 263   return true;
 264 };
 265
 266 export const insertAt = (str: string, subStr: string, pos: number): string =>
 267   `${str.slice(0, pos)}${subStr}${str.slice(pos)}`;
 268
 269 /**
 270  * Computes the retry delay in milliseconds using an exponential backoff algorithm.
 271  *
 272  * @param retryNumber - the number of retries that have already been attempted
 273  * @param maxDelayRatio - the maximum ratio of the delay that can be randomized
 274  * @returns delay in milliseconds
 275  */
 276 export const exponentialDelay = (retryNumber = 0, maxDelayRatio = 0.2): number => {
 277   const delay = Math.pow(2, retryNumber) * 100;
 278   const randomSum = delay * maxDelayRatio * secureRandom(); // 0-(maxDelayRatio*100)% of the delay
 279   return delay + randomSum;
 280 };
 281
 282 const isPromisePending = (promise: Promise<unknown>): boolean => {
 283   return inspect(promise).includes('pending');
 284 };
 285
 286 export const promiseWithTimeout = async <T>(
 287   promise: Promise<T>,
 288   timeoutMs: number,
 289   timeoutError: Error,
 290   timeoutCallback: () => void = () => {
 291     /* This is intentional */
 292   },
 293 ): Promise<T> => {
 294   // Create a timeout promise that rejects in timeout milliseconds
 295   const timeoutPromise = new Promise<never>((_, reject) => {
 296     setTimeout(() => {
 297       if (isPromisePending(promise)) {
 298         timeoutCallback();
 299         // FIXME: The original promise shall be canceled
 300       }
 301       reject(timeoutError);
 302     }, timeoutMs);
 303   });
 304
 305   // Returns a race between timeout promise and the passed promise
 306   return Promise.race<T>([promise, timeoutPromise]);
 307 };
 308
 309 /**
 310  * Generates a cryptographically secure random number in the [0,1[ range
 311  *
 312  * @returns
 313  */
 314 export const secureRandom = (): number => {
 315   return randomBytes(4).readUInt32LE() / 0x100000000;
 316 };
 317
 318 export const JSONStringifyWithMapSupport = (
 319   obj: Record<string, unknown> | Record<string, unknown>[] | Map<unknown, unknown>,
 320   space?: number,
 321 ): string => {
 322   return JSON.stringify(
 323     obj,
 324     (_, value: Record<string, unknown>) => {
 325       if (value instanceof Map) {
 326         return {
 327           dataType: 'Map',
 328           value: [...value],
 329         };
 330       }
 331       return value;
 332     },
 333     space,
 334   );
 335 };
 336
 337 /**
 338  * Converts websocket error code to human readable string message
 339  *
 340  * @param code - websocket error code
 341  * @returns human readable string message
 342  */
 343 export const getWebSocketCloseEventStatusString = (code: number): string => {
 344   if (code >= 0 && code <= 999) {
 345     return '(Unused)';
 346   } else if (code >= 1016) {
 347     if (code <= 1999) {
 348       return '(For WebSocket standard)';
 349     } else if (code <= 2999) {
 350       return '(For WebSocket extensions)';
 351     } else if (code <= 3999) {
 352       return '(For libraries and frameworks)';
 353     } else if (code <= 4999) {
 354       return '(For applications)';
 355     }
 356   }
 357   if (
 358     !isUndefined(
 359       WebSocketCloseEventStatusString[code as keyof typeof WebSocketCloseEventStatusString],
 360     )
 361   ) {
 362     return WebSocketCloseEventStatusString[code as keyof typeof WebSocketCloseEventStatusString];
 363   }
 364   return '(Unknown)';
 365 };
 366
 367 export const isArraySorted = <T>(array: T[], compareFn: (a: T, b: T) => number): boolean => {
 368   for (let index = 0; index < array.length - 1; ++index) {
 369     if (compareFn(array[index], array[index + 1]) > 0) {
 370       return false;
 371     }
 372   }
 373   return true;
 374 };