fix original event without repetition in project overview

Author: slaveeks

src/models/eventsFactory.js

@@ -297,7 +297,10 @@ class EventsFactory extends Factory {
         $unwind: '$event',
       },
       {
-        $unwind: '$repetition',
+        $unwind: {
+          path: '$repetition',
+          preserveNullAndEmptyArrays: true,
+        },
       },
       {
         $match: {
@@ -324,7 +327,21 @@ class EventsFactory extends Factory {
       const repetition = dailyEvent.repetition;
       const event = dailyEvent.event;
 
-      dailyEvent.event = this._composeEventWithRepetition(event, repetition);
+      /**
+       * In case of repetition we need to compose event with repetition
+       * Otherwise we need to put original event with originalTimestamp and originalEventId
+       */
+      if (repetition) {
+        dailyEvent.event = this._composeEventWithRepetition(event, repetition);
+      } else {
+        dailyEvent.event = {
+          ...event,
+          originalTimestamp: event.timestamp,
+          originalEventId: event._id,
+          projectId: this.projectId,
+        };
+      }
+
       dailyEvent.id = dailyEvent._id.toString();
 
       delete dailyEvent.repetition;