/
users.go
84 lines (73 loc) · 1.8 KB
/
users.go
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package store
import (
"context"
"crypto/rand"
"time"
"github.com/go-pg/pg/v10"
"github.com/rs/zerolog/log"
"golang.org/x/crypto/bcrypt"
)
type User struct {
ID int
Username string `binding:"required,min=3,max=30"`
Password string `pg:"-" binding:"required,min=5,max=32"`
HashedPassword []byte `json:"-"`
Salt []byte `json:"-"`
CreatedAt time.Time
ModifiedAt time.Time
Posts []*Post `json:"-" pg:"fk:user_id,rel:has-many,on_delete:CASCADE"`
}
func AddUser(user *User) error {
salt, err := GenerateSalt()
if err != nil {
return err
}
toHash := append([]byte(user.Password), salt...)
hashedPassword, err := bcrypt.GenerateFromPassword(toHash, bcrypt.DefaultCost)
if err != nil {
return err
}
user.Salt = salt
user.HashedPassword = hashedPassword
_, err = db.Model(user).Returning("*").Insert()
if err != nil {
return err
}
return err
}
func Authenticate(username, password string) (*User, error) {
user := new(User)
if err := db.Model(user).Where(
"username = ?", username).Select(); err != nil {
return nil, err
}
salted := append([]byte(password), user.Salt...)
if err := bcrypt.CompareHashAndPassword(user.HashedPassword, salted); err != nil {
return nil, err
}
return user, nil
}
func GenerateSalt() ([]byte, error) {
salt := make([]byte, 16)
if _, err := rand.Read(salt); err != nil {
return nil, err
}
return salt, nil
}
func FetchUser(id int) (*User, error) {
user := new(User)
user.ID = id
err := db.Model(user).Returning("*").WherePK().Select()
if err != nil {
log.Error().Err(err).Msg("Error fetching user")
return nil, err
}
return user, nil
}
var _ pg.AfterSelectHook = (*User)(nil)
func (user *User) AfterSelect(ctx context.Context) error {
if user.Posts == nil {
user.Posts = []*Post{}
}
return nil
}