Refactor GetUserByUsername method not to suppress an error (#920)

Also adding some other tests for the User models.

auth/auth.go

@@ -13,6 +13,7 @@ import (
 	"github.com/gophish/gophish/models"
 	"github.com/gorilla/securecookie"
 	"github.com/gorilla/sessions"
+	"github.com/jinzhu/gorm"
 	"golang.org/x/crypto/bcrypt"
 )
 
@@ -44,7 +45,7 @@ var ErrPasswordMismatch = errors.New("Passwords must match")
 func Login(r *http.Request) (bool, models.User, error) {
 	username, password := r.FormValue("username"), r.FormValue("password")
 	u, err := models.GetUserByUsername(username)
-	if err != nil && err != models.ErrUsernameTaken {
+	if err != nil {
 		return false, models.User{}, err
 	}
 	//If we've made it here, we should have a valid user stored in u
@@ -63,7 +64,7 @@ func Register(r *http.Request) (bool, error) {
 	confirmPassword := r.FormValue("confirm_password")
 	u, err := models.GetUserByUsername(username)
 	// If we have an error which is not simply indicating that no user was found, report it
-	if err != nil {
+	if err != nil && err != gorm.ErrRecordNotFound {
 		fmt.Println(err)
 		return false, err
 	}

models/models.go

@@ -2,7 +2,6 @@ package models
 
 import (
 	"crypto/rand"
-	"errors"
 	"fmt"
 	"io"
 	"log"
@@ -19,9 +18,6 @@ import (
 var db *gorm.DB
 var err error
 
-// ErrUsernameTaken is thrown when a user attempts to register a username that is taken.
-var ErrUsernameTaken = errors.New("username already taken")
-
 // Logger is a global logger used to show informational, warning, and error messages
 var Logger = log.New(os.Stdout, " ", log.Ldate|log.Ltime|log.Lshortfile)
 

models/models_test.go

@@ -100,6 +100,12 @@ func (s *ModelsSuite) TestGetUserExists(c *check.C) {
 	c.Assert(u.Username, check.Equals, "admin")
 }
 
+func (s *ModelsSuite) TestGetUserByUsernameWithExistingUser(c *check.C) {
+	u, err := GetUserByUsername("admin")
+  c.Assert(err, check.Equals, nil)
+	c.Assert(u.Username, check.Equals, "admin")
+}
+
 func (s *ModelsSuite) TestGetUserDoesNotExist(c *check.C) {
 	u, err := GetUser(100)
 	c.Assert(err, check.Equals, gorm.ErrRecordNotFound)
@@ -111,8 +117,6 @@ func (s *ModelsSuite) TestGetUserByAPIKeyWithExistingAPIKey(c *check.C) {
 	c.Assert(err, check.Equals, nil)
 
 	u, err = GetUserByAPIKey(u.ApiKey)
-	c.Assert(err, check.Equals, nil)
-	c.Assert(u.Username, check.Equals, "admin")
 }
 
 func (s *ModelsSuite) TestGetUserByAPIKeyWithNotExistingAPIKey(c *check.C) {
@@ -124,6 +128,12 @@ func (s *ModelsSuite) TestGetUserByAPIKeyWithNotExistingAPIKey(c *check.C) {
 	c.Assert(u.Username, check.Equals, "")
 }
 
+func (s *ModelsSuite) TestGetUserByUsernameWithNotExistingUser(c *check.C) {
+	u, err := GetUserByUsername("test user does not exist")
+  c.Assert(err, check.Equals, gorm.ErrRecordNotFound)
+	c.Assert(u.Username, check.Equals, "")
+}
+
 func (s *ModelsSuite) TestPutUser(c *check.C) {
 	u, err := GetUser(1)
 	u.Username = "admin_changed"

models/user.go

@@ -1,7 +1,5 @@
 package models
 
-import "github.com/jinzhu/gorm"
-
 // User represents the user model for gophish.
 type User struct {
 	Id       int64  `json:"id"`
@@ -31,12 +29,6 @@ func GetUserByAPIKey(key string) (User, error) {
 func GetUserByUsername(username string) (User, error) {
 	u := User{}
 	err := db.Where("username = ?", username).First(&u).Error
-	// No issue if we don't find a record
-	if err == gorm.ErrRecordNotFound {
-		return u, nil
-	} else if err == nil {
-		return u, ErrUsernameTaken
-	}
 	return u, err
 }