add basic auth with uuid-based access tokens

backend/internal/services/user.go

@@ -0,0 +1,44 @@
+package services
+
+import (
+	"log"
+
+	"github.com/wisplite/raster/internal/db"
+	"github.com/wisplite/raster/internal/models"
+	"golang.org/x/crypto/bcrypt"
+)
+
+func CreateUser(username string, password string) error {
+	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		log.Fatal("failed to hash password: ", err)
+		return err
+	}
+	user := models.User{
+		Username: username,
+		Password: string(hashedPassword),
+		IsAdmin:  false,
+	}
+	result := db.GetDB().Create(&user)
+	if result.Error != nil {
+		return result.Error
+	}
+	return nil
+}
+
+func Login(username string, password string) (models.AccessToken, error) {
+	user := models.User{}
+	result := db.GetDB().First(&user, "username = ?", username)
+	if result.Error != nil {
+		return models.AccessToken{}, result.Error
+	}
+	err := bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(password))
+	if err != nil {
+		return models.AccessToken{}, err
+	}
+	accessToken, err := CreateAccessToken(user.ID)
+	if err != nil {
+		return models.AccessToken{}, err
+	}
+	return accessToken, nil
+}