Créer une function pour changer la couleur des events de angular-calendar

Bonjour,

Dans mon projet je me suis servir du pluging angular-calendar.
Le problème que j'ai et que j'aimerai pouvoir changer la couleur d'affichage d'un événement en fonction de son type. J'ai donc créer la fonction mais cela ne marche car c'est toujours la couleur de base qui est affiché.

voici le code de calendar.component.ts

Code:

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import { Component, OnInit, ChangeDetectionStrategy, ViewEncapsulation, ViewChild, TemplateRef  } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { map } from 'rxjs/operators';
import {
  isSameMonth,
  isSameDay,
  startOfMonth,
  endOfMonth,
  startOfWeek,
  endOfWeek,
  startOfDay,
  endOfDay,
  format,
} from 'date-fns';
import { Observable, Subject } from 'rxjs';
import { CalendarDateFormatter, CalendarEvent, CalendarEventAction, CalendarEventTimesChangedEvent, CalendarView, CalendarWeekViewBeforeRenderEvent, CalendarDayViewBeforeRenderEvent, DAYS_OF_WEEK } from 'angular-calendar';
import localeFr from '@angular/common/locales/fr';
import { registerLocaleData } from '@angular/common';
import { Router } from '@angular/router';
import { CustomDateFormatter } from 'src/app/calendar/custom-date-formatter.provider';
 
interface Calendar {
  idBooking: number;
  fullNameCustomer: string;
  start: string;
  end: string;
  formulaBooking: string;
}
 
function changeColor(formulaBooking) {
  if (formulaBooking === 'technicalControl') {
    let color1 = {
      primary: '#0AFBDB',
      secondary: '#078372'
    }
    return color1
  }
  else if (formulaBooking === 'round') {
    let color2 = {
      primary: '#E611B4',
      secondary: '#830766'
    }
    return color2
  }
  else if (formulaBooking === 'forth' || formulaBooking === 'back') {
    let color3 = {
      primary: '#E67B11',
      secondary: '#934F0C'
    }
    return color3
  }
}
 
registerLocaleData(localeFr);
 
@Component({
  selector: 'app-calendar',
  changeDetection: ChangeDetectionStrategy.OnPush,
  encapsulation: ViewEncapsulation.None,
  templateUrl: './calendar.component.html',
  styleUrls: ['./calendar.component.css'],
  providers: [
    {
      provide: CalendarDateFormatter,
      useClass: CustomDateFormatter,
    },
  ]
})
export class CalendarComponent implements OnInit {
 
  view: CalendarView = CalendarView.Week;
  excludeDays: number[] = [0, 6];
  weekStartsOn = DAYS_OF_WEEK.SUNDAY;
  CalendarView = CalendarView;
 
  viewDate: Date = new Date();
 
  events$: Observable<CalendarEvent[]>;
 
  activeDayIsOpen: boolean = false;
 
  locale: string = 'fr';
 
  technicalControl: string;
  round: string;
  back: string;
  forth: string;
 
 
  changeDay(date: Date): void {
    this.viewDate = date;
    this.view = CalendarView.Day;
  }
 
  constructor(private http: HttpClient, private router: Router) { }
 
  ngOnInit(): void {
    this.fetchEvents();
  }
 
 
 
  fetchEvents() {
    this.events$ = this.http.get<Calendar[]>('http://localhost:8888/MoutteCAPI/backend/api/booking/prepareCalendar.php').pipe(
      map(res => {
        return res.map(event => {
          return {
            idBooking: event.idBooking,
            title: event.fullNameCustomer,
            start: new Date(event.start),
            end: new Date(event.end),
            colors: changeColor(event.formulaBooking)
          };
        });
      })
    );
  }
 
  setView(view: CalendarView) {
    this.view = view;
  }
 
  closeOpenMonthViewDay() {
    this.activeDayIsOpen = false;
  }
 
  eventClicked({ event }): void {
    this.router.navigate(['/booking', event.idBooking]);
  }
 
  beforeWeekViewRender(renderEvent: CalendarWeekViewBeforeRenderEvent): void {
    renderEvent.hourColumns.forEach(hourColumn => {
      hourColumn.hours.forEach(hour => {
        hour.segments.forEach(segment => {
          if (
            segment.date.getHours() >= 12 && segment.date.getMinutes() ===  30 &&
            segment.date.getHours() <= 13
          ) {
            segment.cssClass = 'bg-disabled';
          }
        });
      });
    });
  }
 
  beforeWeekViewRender2(renderEvent: CalendarWeekViewBeforeRenderEvent): void {
    renderEvent.hourColumns.forEach(hourColumn => {
      hourColumn.hours.forEach(hour => {
        hour.segments.forEach(segment => {
          if (segment.date.getHours() === 13
          ) {
            segment.cssClass = 'bg-disabled';
          }
        });
      });
    });
  }
}

et voici le code calendar.component.html

Code:

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<div class="row mt-5 mb-5 pt">
  <div class="text-center col-12">
      <h2>Disponibilité Mouttec</h2>
      <button style="font-size: 15px;" routerLink="/addBooking">Ajouter un rendez-vous</button>
  </div>
</div>
<div class="row mb-5 pl-5">
  <div class="text-left col-2 offset-1">
    <h5>Légende :</h5>
  </div>
  <div class="text-left col-3 d-flex flex-row">
    <p class="legend1 mr-2"></p>
    <p>Contrôle technique</p>
  </div>
  <div class="text-left col-2 d-flex flex-row">
    <p class="legend2 mr-2"></p>
    <p>Trajet simple</p>
  </div>
  <div class="text-left col-3 d-flex flex-row">
    <p class="legend3 mr-2"></p>
    <p>Trajet Aller/Retour</p>
  </div>
</div>
 
<div class="row text-center">
  <div class="col-md-4">
    <div class="btn-group">
      <div
        class="button"
        mwlCalendarPreviousView
        [view]="view"
        [(viewDate)]="viewDate"
        (viewDateChange)="closeOpenMonthViewDay()"
        [excludeDays]="excludeDays"
      >
        Précédant
      </div>
      <div
        class="buttonInversion"
        mwlCalendarToday
        [(viewDate)]="viewDate"
      >
        Aujourd'hui
      </div>
      <div
        class="button"
        mwlCalendarNextView
        [view]="view"
        [(viewDate)]="viewDate"
        (viewDateChange)="closeOpenMonthViewDay()"
        [excludeDays]="excludeDays"
      >
        Suivant
      </div>
    </div>
  </div>
  <div class="col-md-4">
    <h3>{{ viewDate | calendarDate:(view + 'ViewTitle'):'fr' }}</h3>
  </div>
  <div class="col-md-4">
    <div class="btn-group">
      <div
        class="buttonInversion"
        (click)="setView(CalendarView.Month)"
        [class.active]="view === CalendarView.Month"
      >
        Mensuelle
      </div>
      <div
        class="buttonInversion"
        (click)="setView(CalendarView.Week)"
        [class.active]="view === CalendarView.Week"
      >
        Hebdommadaire
      </div>
      <div
        class="buttonInversion"
        (click)="setView(CalendarView.Day)"
        [class.active]="view === CalendarView.Day"
      >
        Journalier
      </div>
    </div>
  </div>
</div>
<br />
 
<ng-template #loading>
  <div class="text-center">
    <i class="fas fa-spin fa-spinner fa-5x"></i> <br />
    Loading events...
  </div>
</ng-template>
 
<div *ngIf="events$ | async; else loading; let events" class="pb-5">
  <div [ngSwitch]="view">
    <mwl-calendar-month-view
      *ngSwitchCase="CalendarView.Month"
      [viewDate]="viewDate"
      [events]="events"
      [refresh]="refresh"
      [refresh]="refresh"
      (dayClicked)="changeDay($event.day.date)"
      (viewDateChange)="fetchEvents()"
      (viewChange)="fetchEvents()"
    >
    </mwl-calendar-month-view>
    <mwl-calendar-week-view
      *ngSwitchCase="CalendarView.Week"
      [viewDate]="viewDate"
      [events]="events"
      [refresh]="refresh"
      [excludeDays]="excludeDays"
      [locale]="locale"
      [dayStartHour]="7"
      [dayStartMinute]="00"
      [dayEndHour]="21"
      [dayEndMinute]="00"
      (beforeViewRender)="beforeWeekViewRender($event)"
      (beforeViewRender)="beforeWeekViewRender2($event)"
      (dayHeaderClicked)="changeDay($event.day.date)"
      (eventClicked)="eventClicked($event)"
    >
    </mwl-calendar-week-view>
    <mwl-calendar-day-view
      *ngSwitchCase="CalendarView.Day"
      [viewDate]="viewDate"
      [events]="events"
      [refresh]="refresh"
      [locale]="locale"
      [dayStartHour]="7"
      [dayStartMinute]="00"
      [dayEndHour]="21"
      [dayEndMinute]="00"
      (beforeViewRender)="beforeWeekViewRender($event)"
      (beforeViewRender)="beforeWeekViewRender2($event)"
      (eventClicked)="eventClicked($event)"
    >
    </mwl-calendar-day-view>
  </div>
 
</div>