app/auth/user.go

package auth

import (
	"time"

	"github.com/rs/xid"
	"golang.org/x/crypto/bcrypt"
	"gorm.io/gorm"
)

//User User model
type User struct {
	ID string `gorm:"primaryKey"`

	Username string `gorm:"unique;not null"`
	Password string `json:"-"`

	SSOEnabled  bool
	SSOTok      string
	Activated   bool
	LastLogin   time.Time
	LastLoginIP string
	LoginFailed int

	Groups  []*Group `gorm:"many2many:user_groups;"`
	Profile Profile

	CreatedAt time.Time
	UpdatedAt time.Time
}

// Profile user extended information
type Profile struct {
	ID     uint `gorm:"primaryKey"`
	UserID string

	DisplayName string
	Email       string

	CreatedAt time.Time
	UpdatedAt time.Time
}

// BeforeCreate set UID
func (u *User) BeforeCreate(tx *gorm.DB) (err error) {
	if u.ID == "" {
		u.ID = xid.New().String()
	}
	u.Activated = true
	u.LastLogin = time.Now()
	u.LoginFailed = 0
	return
}

// ChangePassword Change user password to *to*, return nil if success.
func (usr *User) ChangePassword(db *gorm.DB, to string) (err error) {
	bytes, err := bcrypt.GenerateFromPassword([]byte(to), 14)
	if err != nil {
		return err
	}
	err = db.Transaction(func(tx *gorm.DB) error {
		return tx.Model(usr).Update("password", string(bytes)).Error
	})
	if err != nil {
		l.Error().Err(err).Msg("ChangePassword")
	}
	return err
}

// ValidatePassword validates user pass word ,return nil if correct.
func (usr *User) ValidatePassword(pwd string) error {
	return bcrypt.CompareHashAndPassword([]byte(usr.Password), []byte(pwd))
}