update getreport function

handlers/report.go

@@ -42,11 +42,16 @@ func (dh *DatabaseHandler) GetReport(filter models.ReportFilter) (report models.
 
 	for _, e := range events {
 
+		var includesDate bool
+
 		for _, d := range filter.Date {
-			if !strings.Contains(e.Date, d) {
-				continue
+			if strings.Contains(e.Date, d) {
+				includesDate = true
 			}
 		}
+		if !includesDate {
+			continue
+		}
 
 		var data *models.Data
 		if _, ok := count[e.Day]; !ok {
@@ -56,7 +61,7 @@ func (dh *DatabaseHandler) GetReport(filter models.ReportFilter) (report models.
 
 		data, ok := report.Data[e.Day]
 		if !ok {
-			data = &models.Data{}
+			data = &models.Data{Minimal: len(e.Attendees)}
 			report.Data[e.Day] = data
 		}
 
@@ -68,13 +73,14 @@ func (dh *DatabaseHandler) GetReport(filter models.ReportFilter) (report models.
 			data.Maximal = len(e.Attendees)
 		}
 
-		count[e.Day].total = +len(e.Attendees)
+		count[e.Day].total += len(e.Attendees)
 		data.Average = count[e.Day].total / count[e.Day].event
 
 		for _, a := range e.Attendees {
 			if _, ok := addedMember[a.Id]; ok {
 				continue
 			}
+
 			report.Attendees = append(report.Attendees, a)
 			addedMember[a.Id] = true
 		}
@@ -89,8 +95,12 @@ func (dh *DatabaseHandler) GetReport(filter models.ReportFilter) (report models.
 	for _, m := range members {
 		if _, ok := addedMember[m.Id]; ok {
 			continue
-		} else if !slices.Contains(filter.Groups, m.Group.Id) {
-			continue
+		} else if len(filter.Groups) > 0 {
+			if m.Group == nil {
+				continue
+			} else if !slices.Contains(filter.Groups, m.Group.Id) {
+				continue
+			}
 		}
 		report.NonAttendees = append(report.NonAttendees, &m)
 	}