-More!

app/selectors/events.js

@@ -1,12 +1,9 @@
 import { Map } from 'immutable';
 import { createSelector } from 'reselect';
 
-const getState = (state) => state;
+import { getActiveEventId } from './activeEvent.js';
 
-export const getActiveEvent = (state) => {
-  const eventId = state.get('activeEvent');
-  return state.getIn(['events', eventId], false)
-};
+const getState = (state) => state;
 
 export const getEventById = (state, eventId) => state.getIn(['events', eventId], false);
 
@@ -15,7 +12,22 @@ export const getEvents = createSelector(
   (state) => state.get('events') || new Map(),
 );
 
+export const getActiveEvent = createSelector(
+  [getActiveEventId, getEvents],
+  (eventId, eventsAsMap) => eventId ? eventsAsMap.get(eventId) : false,
+);
+
+export const getDefaultEvent = createSelector(
+  [getEvents],
+  (eventsAsMap) => eventsAsMap.first(),
+);
+
 export const getEventsAsList = createSelector(
   [getEvents],
   (eventsAsMap) => eventsAsMap.toList(),
 );
+
+export const hasMultipleEvents = createSelector(
+  [getEvents],
+  (eventsAsMap) => eventsAsMap.size > 1,
+);