Added validation for structs (#19)

pkg/routes/crud/create.go

@@ -17,6 +17,11 @@ func (c *WebHandler) CreateWeb(ctx echo.Context) error {
 		return echo.NewHTTPError(http.StatusBadRequest, "No or invalid model provided.")
 	}
 
+	// Validate the struct
+	if err := ctx.Validate(currentStruct); err != nil {
+		return echo.NewHTTPError(http.StatusBadRequest, err)
+	}
+
 	// Get the user to pass for later checks
 	currentUser, err := models.GetCurrentUser(ctx)
 	if err != nil {

pkg/routes/crud/update.go

@@ -18,6 +18,11 @@ func (c *WebHandler) UpdateWeb(ctx echo.Context) error {
 		return echo.NewHTTPError(http.StatusBadRequest, "No or invalid model provided.")
 	}
 
+	// Validate the struct
+	if err := ctx.Validate(currentStruct); err != nil {
+		return echo.NewHTTPError(http.StatusBadRequest, err)
+	}
+
 	// Check if the user has the right to do that
 	currentUser, err := models.GetCurrentUser(ctx)
 	if err != nil {

pkg/routes/routes.go

@@ -11,17 +11,42 @@
 package routes
 
 import (
-	"code.vikunja.io/api/pkg/models"
-	"github.com/labstack/echo"
-	"github.com/labstack/echo/middleware"
-	"github.com/swaggo/echo-swagger"
-
 	_ "code.vikunja.io/api/docs" // To generate swagger docs
+	"code.vikunja.io/api/pkg/models"
 	apiv1 "code.vikunja.io/api/pkg/routes/api/v1"
 	"code.vikunja.io/api/pkg/routes/crud"
+	"github.com/asaskevich/govalidator"
+	"github.com/labstack/echo"
+	"github.com/labstack/echo/middleware"
 	"github.com/spf13/viper"
+	"github.com/swaggo/echo-swagger"
 )
 
+// CustomValidator is a dummy struct to use govalidator with echo
+type CustomValidator struct{}
+
+// Validate validates stuff
+func (cv *CustomValidator) Validate(i interface{}) error {
+	if _, err := govalidator.ValidateStruct(i); err != nil {
+
+		var errs []string
+		for field, e := range govalidator.ErrorsByField(err) {
+			errs = append(errs, field+": "+e)
+		}
+
+		httperr := models.ValidationHTTPError{
+			models.HTTPError{
+				Code:    models.ErrCodeInvalidData,
+				Message: "Invalid Data",
+			},
+			errs,
+		}
+
+		return httperr
+	}
+	return nil
+}
+
 // NewEcho registers a new Echo instance
 func NewEcho() *echo.Echo {
 	e := echo.New()
@@ -33,6 +58,9 @@ func NewEcho() *echo.Echo {
 		Format: "${time_rfc3339_nano}: ${remote_ip} ${method} ${status} ${uri} ${latency_human} - ${user_agent}\n",
 	}))
 
+	// Validation
+	e.Validator = &CustomValidator{}
+
 	return e
 }