simplify code and add total

api/reportHandler.go

@@ -9,11 +9,6 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
-type counter struct {
-	event int
-	total int
-}
-
 func (a *APIHandler) GetReport(c *gin.Context) {
 	if !a.DBHandlerIsInitialized() {
 		a.logger.Error("GetReport", "database handler is not initialized")
@@ -57,9 +52,6 @@ func (a *APIHandler) GetReport(c *gin.Context) {
 
 	report.Data = make(map[string]*models.Data)
 
-	//helper
-	count := make(map[string]*counter)
-
 	addedMember := make(map[uint]bool)
 
 	if len(events) == 0 {
@@ -70,37 +62,33 @@ func (a *APIHandler) GetReport(c *gin.Context) {
 	for _, e := range events {
 		var includesDate bool
 
-		for _, d := range request.Date {
+		for i, d := range request.Date {
 			if strings.Contains(e.Date, d) {
+				request.Date = slices.Delete(request.Date, i, min(len(request.Date), i+1))
 				includesDate = true
+				break
 			}
 		}
 		if !includesDate {
 			continue
 		}
 
-		var data *models.Data
-		if _, ok := count[e.Day]; !ok {
-			count[e.Day] = &counter{}
+		attendanceLength := len(e.Attendees)
+
+		total, ok := report.Data["total"]
+		if !ok {
+			total = models.AddNewData(attendanceLength)
+			report.Data["total"] = total
 		}
-		count[e.Day].event += 1
 
 		data, ok := report.Data[e.Day]
 		if !ok {
-			data = &models.Data{Minimal: len(e.Attendees)}
+			data = models.AddNewData(attendanceLength)
 			report.Data[e.Day] = data
 		}
 
-		if data.Minimal > len(e.Attendees) {
-			data.Minimal = len(e.Attendees)
-		}
-
-		if data.Maximal < len(e.Attendees) {
-			data.Maximal = len(e.Attendees)
-		}
-
-		count[e.Day].total += len(e.Attendees)
-		data.Average = count[e.Day].total / count[e.Day].event
+		data.AddData(attendanceLength)
+		total.AddData(attendanceLength)
 
 		for _, a := range e.Attendees {
 			if _, ok := addedMember[a.Id]; ok {