fix: NCWF-4 Token Issues (#8)

Co-authored-by: Lala, Shahd <Shahd.Lala@sybit.de>
Co-authored-by: shahdlala66 <shahd.lala66@gmail.com>
Reviewed-on: #8

src/app/services/tournament.service.ts

@@ -0,0 +1,52 @@
+import { Injectable, inject } from '@angular/core';
+import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { Observable } from 'rxjs';
+import { Tournament, TournamentList, RoundPairings } from '../models/tournament.models';
+
+export interface CreateTournamentForm {
+  name: string;
+  nbRounds: number;
+  clockLimitMinutes: number;
+  clockIncrement: number;
+  rated: boolean;
+}
+
+@Injectable({ providedIn: 'root' })
+export class TournamentService {
+  private readonly http = inject(HttpClient);
+  private readonly base = '/api/tournament';
+
+  list(): Observable<TournamentList> {
+    return this.http.get<TournamentList>(this.base);
+  }
+
+  get(id: string): Observable<Tournament> {
+    return this.http.get<Tournament>(`${this.base}/${id}`);
+  }
+
+  create(form: CreateTournamentForm): Observable<Tournament> {
+    const body = new URLSearchParams();
+    body.set('name', form.name);
+    body.set('nbRounds', String(form.nbRounds));
+    body.set('clockLimit', String(form.clockLimitMinutes * 60));
+    body.set('clockIncrement', String(form.clockIncrement));
+    body.set('rated', String(form.rated));
+    return this.http.post<Tournament>(this.base, body.toString(), {
+      headers: new HttpHeaders({ 'Content-Type': 'application/x-www-form-urlencoded' })
+    });
+  }
+
+  start(id: string): Observable<Tournament> {
+    return this.http.post<Tournament>(`${this.base}/${id}/start`, null);
+  }
+
+  joinWithBotToken(id: string, botToken: string): Observable<void> {
+    return this.http.post<void>(`${this.base}/${id}/join`, null, {
+      headers: new HttpHeaders({ Authorization: `Bearer ${botToken}` })
+    });
+  }
+
+  roundPairings(id: string, round: number): Observable<RoundPairings> {
+    return this.http.get<RoundPairings>(`${this.base}/${id}/round/${round}`);
+  }
+}