fix: properly fallback to template OCPP configuration

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

diff --git a/src/utils/Utils.ts b/src/utils/Utils.ts
index 4306d8872e0114928481769feb6bb6daf5ff603e..3d8c73bdf0cdbeec9516dd079832587a0696ebba 100644 (file)
--- a/src/utils/Utils.ts
+++ b/src/utils/Utils.ts
@@ -3,7 +3,6 @@ import util from 'node:util';
 
 import clone from 'just-clone';
 
-// import { Constants } from './internal';
 import { Constants } from './Constants';
 import { WebSocketCloseEventStatusString } from '../types';
 
@@ -222,11 +221,11 @@ export class Utils {
     return value == null;
   }
 
-  public static isEmptyArray(object: unknown | unknown[]): boolean {
+  public static isEmptyArray(object: unknown): boolean {
     return Array.isArray(object) && object.length === 0;
   }
 
-  public static isNotEmptyArray(object: unknown | unknown[]): boolean {
+  public static isNotEmptyArray(object: unknown): boolean {
     return Array.isArray(object) && object.length > 0;
   }
 
@@ -335,4 +334,59 @@ export class Utils {
     }
     return '(Unknown)';
   }
+
+  public static median(dataSet: number[]): number {
+    if (Utils.isEmptyArray(dataSet)) {
+      return 0;
+    }
+    if (Array.isArray(dataSet) === true && dataSet.length === 1) {
+      return dataSet[0];
+    }
+    const sortedDataSet = dataSet.slice().sort((a, b) => a - b);
+    return (
+      (sortedDataSet[(sortedDataSet.length - 1) >> 1] + sortedDataSet[sortedDataSet.length >> 1]) /
+      2
+    );
+  }
+
+  // TODO: use order statistics tree https://en.wikipedia.org/wiki/Order_statistic_tree
+  public static percentile(dataSet: number[], percentile: number): number {
+    if (percentile < 0 && percentile > 100) {
+      throw new RangeError('Percentile is not between 0 and 100');
+    }
+    if (Utils.isEmptyArray(dataSet)) {
+      return 0;
+    }
+    const sortedDataSet = dataSet.slice().sort((a, b) => a - b);
+    if (percentile === 0 || sortedDataSet.length === 1) {
+      return sortedDataSet[0];
+    }
+    if (percentile === 100) {
+      return sortedDataSet[sortedDataSet.length - 1];
+    }
+    const percentileIndexBase = (percentile / 100) * (sortedDataSet.length - 1);
+    const percentileIndexInteger = Math.floor(percentileIndexBase);
+    if (!Utils.isNullOrUndefined(sortedDataSet[percentileIndexInteger + 1])) {
+      return (
+        sortedDataSet[percentileIndexInteger] +
+        (percentileIndexBase - percentileIndexInteger) *
+          (sortedDataSet[percentileIndexInteger + 1] - sortedDataSet[percentileIndexInteger])
+      );
+    }
+    return sortedDataSet[percentileIndexInteger];
+  }
+
+  public static stdDeviation(dataSet: number[]): number {
+    let totalDataSet = 0;
+    for (const data of dataSet) {
+      totalDataSet += data;
+    }
+    const dataSetMean = totalDataSet / dataSet.length;
+    let totalGeometricDeviation = 0;
+    for (const data of dataSet) {
+      const deviation = data - dataSetMean;
+      totalGeometricDeviation += deviation * deviation;
+    }
+    return Math.sqrt(totalGeometricDeviation / dataSet.length);
+  }
 }