serve frontend from go

internal/auth/controller.go

@@ -0,0 +1,113 @@
+package auth
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"log"
+	"net/http"
+
+	"golang.org/x/crypto/bcrypt"
+	"gorm.io/gorm"
+
+	"git.schreifuchs.ch/schreifuchs/ng-blog/internal/model"
+)
+
+// Signup handles user signup by decoding request body, hashing the password, and saving user data to the database.
+func (s *Service) Signup(w http.ResponseWriter, r *http.Request) {
+	var err error
+	var login Login
+	user := model.NewUser()
+
+	if err = json.NewDecoder(r.Body).Decode(&login); err != nil {
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	if len([]byte(login.Password)) > 72 {
+		fmt.Fprint(w, "Password to long, max 72 bytes")
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+	if user.Password, err = bcrypt.GenerateFromPassword([]byte(login.Password), 6); err != nil {
+		log.Println("Error: ", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	user.Name = login.Name
+	user.Role = s.cfg.DefaultRole
+
+	err = s.db.Save(&user).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrCheckConstraintViolated) {
+			fmt.Fprint(w, "Username is already in use")
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+
+		log.Printf("Error: %v", err)
+		w.WriteHeader(http.StatusInternalServerError)
+	}
+}
+
+// Login handles user login by decoding request body, verifying credentials, and returning a JWT token.
+func (s *Service) Login(w http.ResponseWriter, r *http.Request) {
+	var login Login
+	var user model.User
+
+	if err := json.NewDecoder(r.Body).Decode(&login); err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	if err := s.db.First(&user).Error; err != nil {
+		fmt.Fprint(w, "user not found")
+		w.WriteHeader(http.StatusBadRequest)
+	}
+	if err := bcrypt.CompareHashAndPassword(user.Password, []byte(login.Password)); err != nil {
+		fmt.Fprint(w, "Invalid Password")
+		w.WriteHeader(http.StatusBadRequest)
+	}
+
+	token, err := s.createJWT(&user)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	res, err := json.Marshal(&LoginResponse{
+		Token: token,
+	})
+	if err != nil {
+		log.Println("Error: ", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	w.Write(res)
+}
+
+// Logout handles user logout by invalidating the JWT and saving it to the database.
+func (s *Service) Logout(w http.ResponseWriter, r *http.Request) {
+	token, err := extractToken(r)
+	if err != nil {
+		log.Printf("Error while extracting token: %s", err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	claims, err := s.validateJWT(token)
+	if err != nil {
+		fmt.Fprint(w, "Invalid token")
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	if err = s.db.Save(&model.InvalidJWT{JWT: token, ValidUntil: claims.ExpiresAt.Time}).Error; err != nil {
+		log.Printf("Error while saving logout token: %v", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}