Add hashing for link password and update link update service method

link/service.go

@@ -3,6 +3,7 @@ package link
 import (
 	apperrors "cgnolink/errors"
 	"github.com/patrickmn/go-cache"
+	"golang.org/x/crypto/bcrypt"
 	"net/url"
 )
 
@@ -13,7 +14,14 @@ type Service interface {
 	GetById(id string) (*Link, error)
 	AccessLink(id string, password string) (*url.URL, error)
 	GetAll(limit int, offset int) (Links, error)
-	Update(data *Link) error
+	UpdateById(
+		id string,
+		data struct {
+			Name        string
+			Password    string
+			RedirectURL *url.URL
+		},
+	) error
 	DeleteById(id string) error
 }
 
@@ -29,7 +37,7 @@ func (service *PgService) AccessLink(id string, password string) (*url.URL, erro
 	}
 
 	if link.Password != "" {
-		if password == "" || link.Password != password {
+		if password == "" || bcrypt.CompareHashAndPassword([]byte(link.Password), []byte(password)) != nil {
 			return nil, linkNotFoundError
 		}
 	}
@@ -54,6 +62,15 @@ func (service *PgService) Create(link *Link) error {
 		return apperrors.AlreadyExistsError{Message: "Link with given ID already exists."}
 	}
 
+	if link.Password != "" {
+		hashedPassword, err := HashPassword(link.Password)
+		if err != nil {
+			return err
+		}
+
+		link.Password = hashedPassword
+	}
+
 	if err = service.rep.Save(link); err != nil {
 		return apperrors.UnknownError{Err: err}
 	}
@@ -91,11 +108,46 @@ func (service *PgService) GetAll(limit int, offset int) (Links, error) {
 	return links, nil
 }
 
-func (service *PgService) Update(data *Link) error {
-	if err := service.rep.Update(data); err != nil {
-		return apperrors.UnknownError{Err: err}
+func (service *PgService) UpdateById(
+	id string,
+	data struct {
+		Name        string
+		Password    string
+		RedirectURL *url.URL
+	},
+) error {
+	link, err := service.GetById(id)
+	if err != nil {
+		return err
+	}
+
+	hasChanges := false
+	switch {
+	case data.Name != "":
+		link.Name = data.Name
+
+		hasChanges = true
+	case data.RedirectURL != nil:
+		link.RedirectURL = *data.RedirectURL
+
+		hasChanges = true
+	case data.Password != "":
+		hashedPw, err := HashPassword(data.Password)
+		if err != nil {
+			return err
+		}
+
+		link.Password = hashedPw
+
+		hasChanges = true
+	}
+
+	if hasChanges {
+		if err := service.rep.Update(link); err != nil {
+			return apperrors.UnknownError{Err: err}
+		}
+		service.cache.Delete(link.Id)
 	}
-	service.cache.Delete(data.Id)
 
 	return nil
 }
@@ -108,3 +160,12 @@ func (service *PgService) DeleteById(id string) error {
 
 	return nil
 }
+
+func HashPassword(password string) (string, error) {
+	hashedPw, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		return "", apperrors.UnknownError{Err: err}
+	}
+
+	return string(hashedPw), nil
+}