add new report handler

handlers/report.go

@@ -0,0 +1,124 @@
+package handlers
+
+import (
+	"errors"
+	"slices"
+
+	"gitea.tecamino.com/paadi/memberDB/models"
+)
+
+type counter struct {
+	event int
+	total int
+}
+
+func (dh *DatabaseHandler) GetReport(filter models.ReportFilter) (report models.Report, err error) {
+	if !dh.DatabaseOpened() {
+		return report, errors.New("database not opened")
+	}
+
+	var events []models.Event
+
+	if len(filter.Name) > 0 {
+		err = dh.database.GetByKey(&events, "name", filter.Name, true)
+	} else {
+		events, err = dh.GetEvent(0)
+	}
+	if err != nil {
+		return
+	}
+
+	report.Data = make(map[string]*models.Data)
+
+	//helper
+	count := make(map[string]*counter)
+
+	addedMember := make(map[uint]bool)
+
+	for _, e := range events {
+		// skip if date lower or not equal from date as well as greater than to date
+		if (e.Date < filter.Date.From || e.Date > filter.Date.From) && e.Date != filter.Date.From {
+			continue
+		}
+
+		// skip if day not selected
+		switch e.Day {
+		case "Monday":
+			if !filter.Weekdays.Monday {
+				continue
+			}
+		case "Tuesday":
+			if !filter.Weekdays.Tuesday {
+				continue
+			}
+		case "Wednesday":
+			if !filter.Weekdays.Wednesday {
+				continue
+			}
+		case "Thursday":
+			if !filter.Weekdays.Thursday {
+				continue
+			}
+		case "Friday":
+			if !filter.Weekdays.Friday {
+				continue
+			}
+		case "Saturday":
+			if !filter.Weekdays.Saturday {
+				continue
+			}
+		case "Sunday":
+			if !filter.Weekdays.Sunday {
+				continue
+			}
+		}
+
+		var data *models.Data
+		if _, ok := count[e.Day]; !ok {
+			count[e.Day] = &counter{}
+		}
+		count[e.Day].event += 1
+
+		data, ok := report.Data[e.Day]
+		if !ok {
+			data = &models.Data{}
+			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
+
+		for _, a := range e.Attendees {
+			if _, ok := addedMember[a.Id]; ok {
+				continue
+			}
+			report.Attendees = append(report.Attendees, a)
+			addedMember[a.Id] = true
+		}
+	}
+
+	// add all member not attended
+	members, err := dh.GetMember(0)
+	if err != nil {
+		return
+	}
+
+	for _, m := range members {
+		if _, ok := addedMember[m.Id]; ok {
+			continue
+		} else if !slices.Contains(filter.Groups, m.Group.Id) {
+			continue
+		}
+		report.NonAttendees = append(report.NonAttendees, &m)
+	}
+
+	return
+}