First pass of authentication

services/auth/service.go

@@ -0,0 +1,36 @@
+package auth
+
+import (
+	"context"
+
+	"emperror.dev/errors"
+	"lmika.dev/lmika/weiro/models"
+	"lmika.dev/lmika/weiro/providers/db"
+)
+
+type Service struct {
+	db *db.Provider
+}
+
+func New(db *db.Provider) *Service {
+	return &Service{
+		db: db,
+	}
+}
+
+func (s *Service) Login(ctx context.Context, username, password string) (models.User, error) {
+	user, err := s.db.SelectUserByUsername(ctx, username)
+	if err != nil {
+		return models.User{}, err
+	}
+
+	if !user.CheckPassword(password) {
+		return models.User{}, errors.New("invalid password")
+	}
+
+	return user, nil
+}
+
+func (s *Service) GetUser(ctx context.Context, userID int64) (models.User, error) {
+	return s.db.SelectUserByID(ctx, userID)
+}