[#397 bis] added participation management on event from thunderbird (#432)

Co-authored-by: Camille Moussu <cmoussu@linagora.com>

src/features/Events/createEventContext.ts

@@ -0,0 +1,27 @@
+import { Calendar } from "../Calendars/CalendarTypes";
+import { userData } from "../User/userDataTypes";
+import { CalendarEvent, ContextualizedEvent } from "./EventsTypes";
+
+export function createEventContext(
+  event: CalendarEvent,
+  calendar: Calendar,
+  user: userData
+): ContextualizedEvent {
+  const isOwn = calendar.ownerEmails?.includes(user.email) ?? false;
+  const isRecurring = event?.uid?.includes("/") ?? false;
+  const isOrganizer = event.organizer
+    ? user?.email === event.organizer.cal_address
+    : isOwn;
+  const currentUserAttendee = event.attendee?.find(
+    (person) => person.cal_address === user.email
+  );
+
+  return {
+    event,
+    calendar,
+    currentUserAttendee,
+    isOwn,
+    isRecurring,
+    isOrganizer,
+  };
+}