From c1572c5ec6e7f67cc960d0ba160090eb818dac1d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adrian=20Z=C3=BCrcher?= <zuercher@mst.local>
Date: Tue, 10 Feb 2026 21:37:00 +0100
Subject: [PATCH] add new report handler

---
 handlers/report.go | 124 +++++++++++++++++++++++++++++++++++++++++++++
 models/date.go     |   6 +++
 models/report.go   |  20 ++++++++
 models/weekdays.go |  11 ++++
 4 files changed, 161 insertions(+)
 create mode 100644 handlers/report.go
 create mode 100644 models/date.go
 create mode 100644 models/report.go
 create mode 100644 models/weekdays.go

diff --git a/handlers/report.go b/handlers/report.go
new file mode 100644
index 0000000..7e92ad5
--- /dev/null
+++ b/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
+}
diff --git a/models/date.go b/models/date.go
new file mode 100644
index 0000000..6ad5131
--- /dev/null
+++ b/models/date.go
@@ -0,0 +1,6 @@
+package models
+
+type Date struct {
+	From string ` json:"from,omitempty"`
+	To   string ` json:"to,omitempty"`
+}
diff --git a/models/report.go b/models/report.go
new file mode 100644
index 0000000..a4b2eb7
--- /dev/null
+++ b/models/report.go
@@ -0,0 +1,20 @@
+package models
+
+type ReportFilter struct {
+	Weekdays Weekdays `json:"weekdays"`
+	Date     Date     `json:"date"`
+	Groups   []uint   `json:"groupIds,omitempty"`
+	Name     []string `json:"name,omitempty"`
+}
+
+type Report struct {
+	Data         map[string]*Data `json:"data,omitempty"`
+	Attendees    []*Member        `json:"attendees,omitempty"`
+	NonAttendees []*Member        `json:"nonAttendees,omitempty"`
+}
+
+type Data struct {
+	Minimal int `json:"minimal,omitempty"`
+	Average int `json:"average,omitempty"`
+	Maximal int `json:"maximal,omitempty"`
+}
diff --git a/models/weekdays.go b/models/weekdays.go
new file mode 100644
index 0000000..6378957
--- /dev/null
+++ b/models/weekdays.go
@@ -0,0 +1,11 @@
+package models
+
+type Weekdays struct {
+	Monday    bool `json:"monday,omitempty"`
+	Tuesday   bool `json:"tuesday,omitempty"`
+	Wednesday bool `json:"wednesday,omitempty"`
+	Thursday  bool `json:"thursday,omitempty"`
+	Friday    bool `json:"friday,omitempty"`
+	Saturday  bool `json:"saturday,omitempty"`
+	Sunday    bool `json:"sunday,omitempty"`
+}