Reworked login system + added substitution page

BetterIServ.Mobile/src/app/api/units.service.ts

@@ -0,0 +1,27 @@
+import { Injectable } from '@angular/core';
+import {HttpClient} from "@angular/common/http";
+import {IServService} from "./iserv.service";
+import {UnitsData} from "../entities/substitution";
+import {firstValueFrom} from "rxjs";
+
+@Injectable({
+  providedIn: 'root'
+})
+export class UnitsService {
+
+  private schools: {[domain: string]: {today: string, tomorrow: string}} = {
+    ["hgbp.de"]: {
+      today: "https://www.humboldt-gymnasium.de/vertretungsplan/PlanINet/heute/subst_001.htm",
+      tomorrow: "https://www.humboldt-gymnasium.de/vertretungsplan/PlanINet/morgen/subst_001.htm"
+    }
+  }
+
+  constructor(private iserv: IServService, private client: HttpClient) {}
+
+  public async getSubstitutionPlan(date: "today" | "tomorrow"): Promise<UnitsData> {
+    if (this.schools[this.iserv.userdata.domain] == undefined) return undefined;
+    const url = this.schools[this.iserv.userdata.domain][date];
+    return await firstValueFrom(this.client.get<UnitsData>(this.iserv.backend + "/units/substitution?url=" + url));
+  }
+
+}