Files
krafttrainer/backend/internal/store/user_store.go
Christoph K. a954f2c59d Add multi-user support with export feature
- New users table (migration 004) with user_id on exercises, training_sets, sessions
- User CRUD endpoints (GET/POST /api/v1/users, DELETE /api/v1/users/{id})
- All existing endpoints scoped to X-User-ID header
- CSV export endpoint (GET /api/v1/export) for completed sessions
- UserGate in PageShell: blocks app until a user is selected
- Settings page for managing users (create, switch, delete)
- BottomNav/Sidebar updated with settings navigation
- Fix: nil pointer panic in handleDeleteUser on success path
- Fix: export download now uses fetch with X-User-ID header instead of window.location.href

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-21 23:55:51 +01:00

74 lines
1.8 KiB
Go

package store
import (
"database/sql"
"fmt"
"krafttrainer/internal/model"
)
// ListUsers gibt alle Nutzer zurück.
func (s *Store) ListUsers() ([]model.User, error) {
rows, err := s.db.Query(`SELECT id, name, created_at FROM users ORDER BY created_at`)
if err != nil {
return nil, fmt.Errorf("Nutzer abfragen: %w", err)
}
defer rows.Close()
var users []model.User
for rows.Next() {
var u model.User
if err := rows.Scan(&u.ID, &u.Name, &u.CreatedAt); err != nil {
return nil, fmt.Errorf("Nutzer scannen: %w", err)
}
users = append(users, u)
}
if users == nil {
users = []model.User{}
}
return users, rows.Err()
}
// CreateUser legt einen neuen Nutzer an.
func (s *Store) CreateUser(name string) (*model.User, error) {
result, err := s.db.Exec(`INSERT INTO users (name) VALUES (?)`, name)
if err != nil {
return nil, fmt.Errorf("Nutzer erstellen: %w", err)
}
id, _ := result.LastInsertId()
return s.getUser(id)
}
// DeleteUser löscht einen Nutzer, sofern noch mindestens ein weiterer existiert.
func (s *Store) DeleteUser(id int64) error {
var count int
if err := s.db.QueryRow(`SELECT COUNT(*) FROM users`).Scan(&count); err != nil {
return fmt.Errorf("Nutzeranzahl prüfen: %w", err)
}
if count <= 1 {
return fmt.Errorf("LAST_USER: letzter Nutzer kann nicht gelöscht werden")
}
result, err := s.db.Exec(`DELETE FROM users WHERE id = ?`, id)
if err != nil {
return fmt.Errorf("Nutzer löschen: %w", err)
}
rows, _ := result.RowsAffected()
if rows == 0 {
return sql.ErrNoRows
}
return nil
}
func (s *Store) getUser(id int64) (*model.User, error) {
var u model.User
err := s.db.QueryRow(`SELECT id, name, created_at FROM users WHERE id = ?`, id).
Scan(&u.ID, &u.Name, &u.CreatedAt)
if err == sql.ErrNoRows {
return nil, nil
}
if err != nil {
return nil, fmt.Errorf("Nutzer abfragen: %w", err)
}
return &u, nil
}