initial: ZeroTier-like P2P mesh VPN server with multi-tenant Web UI

internal/repository/user.go

@@ -0,0 +1,58 @@
+package repository
+
+import (
+	"zeromesh/internal/database"
+	"zeromesh/internal/model"
+)
+
+type UserRepo struct {
+	db *database.DB
+}
+
+func NewUserRepo(db *database.DB) *UserRepo {
+	return &UserRepo{db: db}
+}
+
+func (r *UserRepo) FindByUsername(username string) (*model.User, error) {
+	var user model.User
+	err := r.db.Where("username = ?", username).First(&user).Error
+	if err != nil {
+		return nil, err
+	}
+	return &user, nil
+}
+
+func (r *UserRepo) FindByID(id uint) (*model.User, error) {
+	var user model.User
+	err := r.db.First(&user, id).Error
+	if err != nil {
+		return nil, err
+	}
+	return &user, nil
+}
+
+func (r *UserRepo) Create(user *model.User) error {
+	return r.db.Create(user).Error
+}
+
+func (r *UserRepo) Count() (int64, error) {
+	var count int64
+	err := r.db.Model(&model.User{}).Count(&count).Error
+	return count, err
+}
+
+func (r *UserRepo) HasAdmin() (bool, error) {
+	var count int64
+	err := r.db.Model(&model.User{}).Where("role = ?", "admin").Count(&count).Error
+	return count > 0, err
+}
+
+func (r *UserRepo) UpdatePassword(id uint, hashed string) error {
+	return r.db.Model(&model.User{}).Where("id = ?", id).Update("password", hashed).Error
+}
+
+func (r *UserRepo) List(offset, limit int) ([]model.User, error) {
+	var users []model.User
+	err := r.db.Offset(offset).Limit(limit).Order("id desc").Find(&users).Error
+	return users, err
+}