Ajout d'un système de cache des

requêtes HTTP

Front/skydivelogs-app/src/services/date.service.ts

@@ -0,0 +1,26 @@
+import { Injectable } from '@angular/core';
+
+@Injectable()
+export class DateService {
+    private milliSeconInDay: number;
+
+    constructor() {
+        this.milliSeconInDay = 1000 * 60 * 60 * 24;
+    }
+
+    public AddDays(currentDate: Date, nbDays: number): Date {
+        const totalMilliSeconds = nbDays * this.milliSeconInDay;
+        const currentTime = currentDate.getTime();
+
+        currentDate.setTime(currentTime + totalMilliSeconds);
+
+        return currentDate;
+    }
+
+    public DiffBetweenDates(beginDate: Date, endDate: Date): number {
+        const diffInTime = endDate.getTime() - beginDate.getTime();
+        const diffInDays = Math.round(diffInTime / (1000 * 3600 * 24));
+
+        return diffInDays;
+    }
+}