Bug/803 perfomance lesson teachers except lesson absences (#805)

* only get absences CreatedOn after today-60 days

* fix tests

* fix subday and formatISOLocalDate #803

Author: schefbi

src/app/presence-control/services/presence-control-state.service.spec.ts

@@ -342,7 +342,7 @@ describe("PresenceControlStateService", () => {
     personId: number,
     students?: number[],
   ): void {
-    let url = `https://eventotest.api/LessonTeachers/except/${personId}/LessonAbsences?expand=LessonRef`;
+    let url = `https://eventotest.api/LessonTeachers/except/${personId}/LessonAbsences?expand=LessonRef&filter.CreatedOn=>1999-11-24`;
     if (students && students.length > 0) {
       url = url.concat("&filter.StudentRef=;", students.join(";"));
     }

src/app/shared/services/lesson-teachers-rest.service.ts

@@ -1,9 +1,11 @@
 import { HttpClient, HttpParams } from "@angular/common/http";
 import { Injectable, inject } from "@angular/core";
+import { subDays } from "date-fns/subDays";
 import { Observable } from "rxjs";
 import { switchMap } from "rxjs/operators";
 import { SETTINGS, Settings } from "../../settings";
 import { LessonAbsence } from "../models/lesson-absence.model";
+import { formatISOLocalDate } from "../utils/date";
 import { decodeArray } from "../utils/decode";
 import { RestService } from "./rest.service";
 
@@ -21,15 +23,17 @@ export class LessonTeachersRestService extends RestService<
   }
 
   /**
-   * Returns all lesson absences for the current lesson and the specified students
+   * Returns all lesson absences CreatedOn after today-60 days and the specified students
    * for all teachers except the specified teacher.
    */
   loadOtherTeachersLessonAbsences(
     personId: number,
     students: number[],
     params?: HttpParams | Dict<string>,
   ): Observable<ReadonlyArray<LessonAbsence>> {
-    let url = `${this.baseUrl}/except/${personId}/LessonAbsences?expand=LessonRef`;
+    const fromDate = subDays(new Date(), 60);
+
+    let url = `${this.baseUrl}/except/${personId}/LessonAbsences?expand=LessonRef&filter.CreatedOn=>${formatISOLocalDate(fromDate)}`;
     if (students && students.length > 0) {
       url = url.concat("&filter.StudentRef=;" + students.join(";"));
     }