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class EventList<T> {
Map<DateTime, List<T>> events;
EventList({
required this.events,
});
void add(DateTime date, T event) {
final eventsOfDate = events[date];
if (eventsOfDate == null)
events[date] = [event];
else
eventsOfDate.add(event);
}
void addAll(DateTime date, List<T> events) {
final eventsOfDate = this.events[date];
if (eventsOfDate == null)
this.events[date] = events;
else
eventsOfDate.addAll(events);
}
bool remove(DateTime date, T event) {
final eventsOfDate = events[date];
return eventsOfDate != null ? eventsOfDate.remove(event) : false;
}
List<T> removeAll(DateTime date) {
return events.remove(date) ?? [];
}
void clear() {
events.clear();
}
List<T> getEvents(DateTime date) {
return events[date] ?? [];
}
}
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