Added maybeUid to createEvent and createMeeting

lib/calendarClient.ts

@@ -512,10 +512,11 @@ const listCalendars = (withCredentials) =>
 const createEvent = async (
   credential: Credential,
   calEvent: CalendarEvent,
-  noMail = false
+  noMail = false,
+  maybeUid: string = null
 ): Promise<EventResult> => {
   const parser: CalEventParser = new CalEventParser(calEvent);
-  const uid: string = parser.getUid();
+  const uid: string = maybeUid ?? parser.getUid();
   const richEvent: CalendarEvent = parser.asRichEvent();
 
   let success = true;

lib/events/EventManager.ts

@@ -54,19 +54,21 @@ export default class EventManager {
    * Takes a CalendarEvent and creates all necessary integration entries for it.
    * When a video integration is chosen as the event's location, a video integration
    * event will be scheduled for it as well.
+   * An optional uid can be set to override the auto-generated uid.
    *
    * @param event
+   * @param maybeUid
    */
-  public async create(event: CalendarEvent): Promise<CreateUpdateResult> {
+  public async create(event: CalendarEvent, maybeUid: string = null): Promise<CreateUpdateResult> {
     event = EventManager.processLocation(event);
     const isVideo = EventManager.isIntegration(event.location);
 
     // First, create all calendar events. If this is a video event, don't send a mail right here.
-    const results: Array<EventResult> = await this.createAllCalendarEvents(event, isVideo);
+    const results: Array<EventResult> = await this.createAllCalendarEvents(event, isVideo, maybeUid);
 
     // If and only if event type is a video meeting, create a video meeting as well.
     if (isVideo) {
-      results.push(await this.createVideoEvent(event));
+      results.push(await this.createVideoEvent(event, maybeUid));
     }
 
     const referencesToCreate: Array<PartialReference> = results.map((result) => {
@@ -151,13 +153,20 @@ export default class EventManager {
    * a video meeting because then the mail containing the video credentials will be
    * more important than the mails created for these bare calendar events.
    *
+   * When the optional uid is set, it will be used instead of the auto generated uid.
+   *
    * @param event
    * @param noMail
+   * @param maybeUid
    * @private
    */
-  private createAllCalendarEvents(event: CalendarEvent, noMail: boolean): Promise<Array<EventResult>> {
+  private createAllCalendarEvents(
+    event: CalendarEvent,
+    noMail: boolean,
+    maybeUid: string = null
+  ): Promise<Array<EventResult>> {
     return async.mapLimit(this.calendarCredentials, 5, async (credential: Credential) => {
-      return createEvent(credential, event, noMail);
+      return createEvent(credential, event, noMail, maybeUid);
     });
   }
 
@@ -175,14 +184,17 @@ export default class EventManager {
   /**
    * Creates a video event entry for the selected integration location.
    *
+   * When optional uid is set, it will be used instead of the auto generated uid.
+   *
    * @param event
+   * @param maybeUid
    * @private
    */
-  private createVideoEvent(event: CalendarEvent): Promise<EventResult> {
+  private createVideoEvent(event: CalendarEvent, maybeUid: string = null): Promise<EventResult> {
     const credential = this.getVideoCredential(event);
 
     if (credential) {
-      return createMeeting(credential, event);
+      return createMeeting(credential, event, maybeUid);
     } else {
       return Promise.reject("No suitable credentials given for the requested integration name.");
     }

lib/videoClient.ts

@@ -201,8 +201,12 @@ const getBusyVideoTimes = (withCredentials) =>
     results.reduce((acc, availability) => acc.concat(availability), [])
   );
 
-const createMeeting = async (credential, calEvent: CalendarEvent): Promise<EventResult> => {
-  const uid: string = translator.fromUUID(uuidv5(JSON.stringify(calEvent), uuidv5.URL));
+const createMeeting = async (
+  credential,
+  calEvent: CalendarEvent,
+  maybeUid: string = null
+): Promise<EventResult> => {
+  const uid: string = maybeUid ?? translator.fromUUID(uuidv5(JSON.stringify(calEvent), uuidv5.URL));
 
   if (!credential) {
     throw new Error(