add new handlers for event and responsible tables

2025-10-17 15:41:13 +02:00
parent 521896510d
commit 5d0496f1db
13 changed files with 989 additions and 556 deletions
--- a/handlers/events.go
+++ b/handlers/events.go
@@ -0,0 +1,170 @@
+package handlers
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"slices"
+	"strings"
+	"time"
+
+	"gitea.tecamino.com/paadi/memberDB/models"
+)
+
+func (dh *DatabaseHandler) CreateNewEventTable() error {
+	createTableSQL := `
+	CREATE TABLE IF NOT EXISTS events (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		name TEXT NOT NULL,
+		date TEXT UNIQUE NOT NULL,
+		attendees TEXT NOT NULL,
+		count INTEGER NOT NULL
+	);`
+
+	_, err := dh.database.Exec(createTableSQL)
+	if err != nil {
+		return fmt.Errorf("failed to create table: %w", err)
+	}
+	return nil
+}
+
+func (dh *DatabaseHandler) StartNewEvent(name string) error {
+	_, err := dh.database.Exec("INSERT INTO events (name, date, attendees, count) VALUES (?, ?, ?, ?)", name, time.Now().Format("2006-01-02 15:04:05"), "[]", 0)
+	return err
+}
+
+func (dh *DatabaseHandler) GetEvent(id int) (attendees []models.Event, err error) {
+	var args any
+	query := `SELECT id, name, date, attendees, count FROM events`
+
+	if id > 0 {
+		query += ` WHERE id = ?`
+		args = id
+	}
+
+	rows, err := dh.database.Query(query, args)
+	if err != nil {
+		return
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var id, count int
+		var name, date, attendance string
+		if err = rows.Scan(&id, &name, &date, &attendance, &count); err != nil {
+			return
+		}
+
+		var a []models.Person
+
+		if err := json.Unmarshal([]byte(attendance), &a); err != nil {
+			return attendees, err
+		}
+
+		attendees = append(attendees, models.Event{
+			Id:        id,
+			Name:      name,
+			Date:      date,
+			Attendees: a,
+			Count:     count,
+		})
+	}
+
+	return attendees, nil
+}
+
+func (dh *DatabaseHandler) DeleteEvent(ids ...int) error {
+	if len(ids) == 0 {
+		return errors.New("no ids given to be deleted")
+	}
+
+	placeholders := make([]string, len(ids))
+	args := make([]any, len(ids))
+	for i, id := range ids {
+		placeholders[i] = "?"
+		args[i] = id
+	}
+	query := fmt.Sprintf("DELETE FROM events WHERE id IN (%s)", strings.Join(placeholders, ","))
+
+	_, err := dh.database.Exec(query, args...)
+	return err
+}
+
+func (dh *DatabaseHandler) AddAttendeesToEvent(event models.Event) error {
+
+	//get event from database by id
+	row := dh.database.QueryRow(`SELECT attendees FROM events WHERE id = ?`, event.Id)
+
+	var attendeesString string
+	if err := row.Scan(&attendeesString); err != nil {
+		return err
+	}
+	fmt.Println(attendeesString)
+
+	var attendees []models.Person
+	err := json.Unmarshal([]byte(attendeesString), &attendees)
+	if err != nil {
+		return err
+	}
+
+next:
+	for _, newAttendee := range event.Attendees {
+		for _, attendee := range attendees {
+			if attendee.FirstName == newAttendee.FirstName && attendee.LastName == newAttendee.LastName {
+				continue next
+			}
+		}
+		attendees = append(attendees, newAttendee)
+	}
+
+	attendeesByte, err := json.Marshal(attendees)
+	if err != nil {
+		return err
+	}
+
+	count := len(attendees)
+	_, err = dh.database.Exec("UPDATE events SET attendees= ? count= ? WHERE id= ?", string(attendeesByte), event.Id, count)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (dh *DatabaseHandler) DeleteAttendeesFromEvent(event models.Event) error {
+	//get event from database by id
+	row := dh.database.QueryRow(`SELECT attendees FROM events WHERE id = ?`, event.Id)
+
+	var attendeesString string
+	if err := row.Scan(&attendeesString); err != nil {
+		return err
+	}
+	fmt.Println(attendeesString)
+
+	var attendees []models.Person
+	err := json.Unmarshal([]byte(attendeesString), &attendees)
+	if err != nil {
+		return err
+	}
+
+	for _, newAttendee := range event.Attendees {
+		for i, attendee := range attendees {
+			if attendee.FirstName == newAttendee.FirstName && attendee.LastName == newAttendee.LastName {
+				attendees = slices.Delete(attendees, i, i+1)
+			}
+		}
+	}
+
+	attendeesByte, err := json.Marshal(attendees)
+	if err != nil {
+		return err
+	}
+
+	count := len(attendees)
+	_, err = dh.database.Exec("UPDATE events SET attendees= ? count= ? WHERE id= ?", string(attendeesByte), event.Id, count)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}