Added user authentication

services/users/service.go

@@ -0,0 +1,76 @@
+package users
+
+import (
+	"context"
+	"encoding/base64"
+	"golang.org/x/crypto/bcrypt"
+	"lmika.dev/lmika/hugo-cms/models"
+	"lmika.dev/lmika/hugo-cms/providers/db"
+	"log"
+)
+
+type Service struct {
+	dbp *db.DB
+}
+
+func NewService(dbp *db.DB) *Service {
+	return &Service{
+		dbp: dbp,
+	}
+}
+
+func (s *Service) AddUser(ctx context.Context, newUser NewUser) (models.User, error) {
+	passwd, err := bcrypt.GenerateFromPassword([]byte(newUser.Password), bcrypt.DefaultCost)
+	if err != nil {
+		return models.User{}, err
+	}
+
+	user := models.User{
+		Email:        newUser.Email,
+		PasswordHash: base64.StdEncoding.EncodeToString(passwd),
+	}
+	if err := s.dbp.AddUser(ctx, &user); err != nil {
+		return models.User{}, err
+	}
+
+	return user, nil
+}
+
+func (s *Service) GetUserByID(ctx context.Context, id int64) (models.User, error) {
+	return s.dbp.GetUserByID(ctx, id)
+}
+
+func (s *Service) VerifyLogin(ctx context.Context, email string, password string) (models.User, error) {
+	user, err := s.dbp.GetUserByEmail(ctx, email)
+	if err != nil {
+		log.Println("User not found")
+		return models.User{}, err
+	}
+
+	pwdHash, err := base64.StdEncoding.DecodeString(user.PasswordHash)
+	if err != nil {
+		return models.User{}, err
+	}
+
+	err = bcrypt.CompareHashAndPassword(pwdHash, []byte(password))
+	if err != nil {
+		log.Println("Password incorrect")
+		return models.User{}, err
+	}
+
+	return user, nil
+}
+
+func (s *Service) GetUserByEmail(ctx context.Context, email string) (models.User, error) {
+	user, err := s.dbp.GetUserByEmail(ctx, email)
+	if err != nil {
+		return models.User{}, err
+	}
+
+	return user, nil
+}
+
+type NewUser struct {
+	Email    string `json:"email"`
+	Password string `json:"password"`
+}