Added custom error type for user does not exist

models/error.go

@@ -36,3 +36,18 @@ func IsErrNoUsername(err error) bool {
 func (err ErrNoUsername) Error() string {
 	return fmt.Sprintf("you need to specify a username [user id: %d]", err.UserID)
 }
+
+// ErrUserDoesNotExist represents a "UsernameAlreadyExists" kind of error.
+type ErrUserDoesNotExist struct {
+	UserID int64
+}
+
+// IsErrNoUsername checks if an error is a ErrUsernameExists.
+func IsErrUserDoesNotExist(err error) bool {
+	_, ok := err.(ErrUserDoesNotExist)
+	return ok
+}
+
+func (err ErrUserDoesNotExist) Error() string {
+	return fmt.Sprintf("this user does not exist [user id: %d]", err.UserID)
+}

models/user.go

@@ -68,7 +68,7 @@ func CheckUserCredentials(u *UserLogin) (User, error) {
 	}
 
 	if !exists {
-		return User{}, fmt.Errorf("user does not exist")
+		return User{}, ErrUserDoesNotExist{}
 	}
 
 	// Check the users password

models/user_add_update.go

@@ -57,6 +57,10 @@ func UpdateUser(user User) (updatedUser User, err error) {
 
 	// Check if it exists
 	theUser, exists, err := GetUserByID(user.ID)
+	if err != nil {
+		return User{}, err
+	}
+
 	if exists {
 
 		user.Password = theUser.Password // set the password to the one in the database to not accedently resetting it
@@ -66,9 +70,16 @@ func UpdateUser(user User) (updatedUser User, err error) {
 		if err != nil {
 			return User{}, err
 		}
+
+		// Get the newly updated user
+		updatedUser, _, err = GetUserByID(user.ID)
+		if err != nil {
+			return User{}, err
+		}
+		return updatedUser, nil
 	}
 
-	return User{}, fmt.Errorf("This user does not exist")
+	return User{}, ErrUserDoesNotExist{user.ID}
 }
 
 // UpdateUserPassword updates the password of a user

routes/api/v1/user_show.go

@@ -0,0 +1,36 @@
+package v1
+
+import (
+	"github.com/labstack/echo"
+	"net/http"
+	"strconv"
+	"git.mowie.cc/konrad/Library/models"
+)
+
+func UserShow(c echo.Context) error {
+	user := c.Param("id")
+
+	if user == "" {
+		return c.JSON(http.StatusBadRequest, models.Message{"User ID cannot be empty."})
+	}
+
+	// Make int
+	userID, err := strconv.ParseInt(user, 10, 64)
+	if err != nil {
+		return c.JSON(http.StatusInternalServerError, models.Message{"Error getting user infos."})
+	}
+
+	// Get User Infos
+	userInfos, exists, err := models.GetUserByID(userID)
+
+	if err != nil {
+		return c.JSON(http.StatusInternalServerError, models.Message{"Error getting user infos."})
+	}
+
+	// Check if it exists
+	if !exists {
+		return c.JSON(http.StatusNotFound, models.Message{"User not found."})
+	}
+
+	return c.JSON(http.StatusOK, userInfos)
+}