create password auth skeleton

api/user.go

@@ -7,6 +7,7 @@ import (
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
 	"github.com/google/uuid"
+	"golang.org/x/crypto/bcrypt"
 )
 
 func UserCtx(next http.Handler) http.Handler {
@@ -67,10 +68,17 @@ func NewUser(w http.ResponseWriter, r *http.Request) {
 	}
 
 	newUserName := r.FormValue("name")
+	password := r.FormValue("password")
+	if newUserName == "" || password == "" {
+		http.Error(w, "Username and password cannot be empty", http.StatusBadRequest)
+		return
+	}
 
+	hashedPassword, err := hashPassword(password)
 	newUser := User{
-		ID:   newUserID(),
-		Name: newUserName,
+		ID:       newUserID(),
+		Name:     newUserName,
+		Password: hashedPassword,
 	}
 
 	err = dbAddUser(&newUser)
@@ -82,15 +90,54 @@ func NewUser(w http.ResponseWriter, r *http.Request) {
 	render.Render(w, r, NewUserPayloadResponse(&newUser))
 }
 
+func Login(w http.ResponseWriter, r *http.Request) {
+	err := r.ParseMultipartForm(64 << 10)
+	if err != nil {
+		http.Error(w, "Unable to parse form", http.StatusBadRequest)
+		return
+	}
+
+	username := r.FormValue("name")
+	password := r.FormValue("password")
+	if username == "" || password == "" {
+		http.Error(w, "Username and password cannot be empty", http.StatusBadRequest)
+		return
+	}
+
+	user, err := dbGetUserByName(username)
+	if err != nil {
+		http.Error(w, "Invalid username or password", http.StatusUnauthorized)
+		return
+	}
+
+	err = validatePassword(user.Password, password)
+	if err != nil {
+		http.Error(w, "Invalid username or password", http.StatusUnauthorized)
+		return
+	}
+
+	w.Write([]byte("Login successful"))
+}
+
 func (u *UserPayload) Render(w http.ResponseWriter, r *http.Request) error {
 	return nil
 }
 
+func hashPassword(password string) (string, error) {
+	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	return string(hashedPassword), err
+}
+
+func validatePassword(hashedPassword, password string) error {
+	return bcrypt.CompareHashAndPassword([]byte(hashedPassword), []byte(password))
+}
+
 type userKey struct{}
 
 type User struct {
-	ID   string `json:"id"`
-	Name string `json:"name"`
+	ID       string `json:"id"`
+	Name     string `json:"name"`
+	Password string `json:"-"`
 }
 
 type UserPayload struct {