Add UI HTTP server (#6)

[e-mobility-charging-stations-simulator.git] / src / utils / Utils.ts

diff --git a/src/utils/Utils.ts b/src/utils/Utils.ts
index 6133177f9aeca78c7970b2a123370d9d187f24c9..1ad1a7924bb0b5e4eb5e8fc7778a9d89f953eda6 100644 (file)
--- a/src/utils/Utils.ts
+++ b/src/utils/Utils.ts
@@ -1,10 +1,12 @@
-import Configuration from './Configuration';
-import { WebSocketCloseEventStatusString } from '../types/WebSocket';
-import { WorkerProcessType } from '../types/Worker';
 import crypto from 'crypto';
+
 import { v4 as uuid } from 'uuid';
 
 export default class Utils {
+  private constructor() {
+    // This is intentional
+  }
+
   public static logPrefix(prefixString = ''): string {
     return new Date().toLocaleString() + prefixString;
   }
@@ -14,14 +16,14 @@ export default class Utils {
   }
 
   public static async sleep(milliSeconds: number): Promise<NodeJS.Timeout> {
-    return new Promise((resolve) => setTimeout(resolve, milliSeconds));
+    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);
+    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();
@@ -93,7 +95,7 @@ export default class Utils {
         result = value;
       } else {
         // Convert
-        result = (value === 'true');
+        result = value === 'true';
       }
     }
     return result;
@@ -104,7 +106,7 @@ export default class Utils {
       throw new RangeError('Invalid interval');
     }
     const randomPositiveFloat = crypto.randomBytes(4).readUInt32LE() / 0xffffffff;
-    const sign = (negative && randomPositiveFloat < 0.5) ? -1 : 1;
+    const sign = negative && randomPositiveFloat < 0.5 ? -1 : 1;
     return sign * (randomPositiveFloat * (max - min) + min);
   }
 
@@ -140,12 +142,20 @@ export default class Utils {
     return Utils.roundTo(Utils.getRandomFloat(max), scale);
   }
 
-  public static getRandomFloatFluctuatedRounded(staticValue: number, fluctuationPercent: number, scale = 2): number {
+  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);
+    return Utils.getRandomFloatRounded(
+      staticValue * (1 + fluctuationRatio),
+      staticValue * (1 - fluctuationRatio),
+      scale
+    );
   }
 
   public static cloneObject<T>(object: T): T {
@@ -153,26 +163,24 @@ export default class Utils {
   }
 
   public static isIterable<T>(obj: T): boolean {
-    if (obj) {
-      return typeof obj[Symbol.iterator] === 'function';
-    }
-    return false;
+    return obj ? typeof obj[Symbol.iterator] === 'function' : false;
   }
 
   public static isString(value: unknown): boolean {
     return typeof value === 'string';
   }
 
+  public static isEmptyString(value: unknown): boolean {
+    return Utils.isString(value) && (value as string).length === 0;
+  }
+
   public static isUndefined(value: unknown): boolean {
     return typeof value === 'undefined';
   }
 
   public static isNullOrUndefined(value: unknown): boolean {
-    // eslint-disable-next-line no-eq-null, eqeqeq
-    if (value == null) {
-      return true;
-    }
-    return false;
+    // eslint-disable-next-line eqeqeq, no-eq-null
+    return value == null ? true : false;
   }
 
   public static isEmptyArray(object: unknown): boolean {
@@ -185,11 +193,12 @@ export default class Utils {
     return true;
   }
 
-  public static isEmptyObject(obj: Record<string, unknown>): boolean {
+  public static isEmptyObject(obj: object): boolean {
     return !Object.keys(obj).length;
   }
 
-  public 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 [retryNumber=0]
@@ -201,50 +210,18 @@ export default class Utils {
     return delay + randomSum;
   }
 
-  /**
-   * 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)';
-  }
-
-  public static workerPoolInUse(): boolean {
-    return [WorkerProcessType.DYNAMIC_POOL, WorkerProcessType.STATIC_POOL].includes(Configuration.getWorkerProcess());
-  }
-
-  public static workerDynamicPoolInUse(): boolean {
-    return Configuration.getWorkerProcess() === WorkerProcessType.DYNAMIC_POOL;
-  }
-
   public static async promiseWithTimeout<T>(
-      promise: Promise<T>,
-      timeoutMs: number,
-      timeoutError: Error,
-      timeoutCallback: () => void = () => { /* This is intentional */ }
+    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;
+        timeoutCallback();
         reject(timeoutError);
       }, timeoutMs);
     });