determined variable values to be passed

for #74

validator.go

@@ -8,6 +8,17 @@
 
 package validator
 
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+const (
+	fieldErrMsg = "Key: \"%s\" Error:Field validation for \"%s\" failed on the \"%s\" tag"
+)
+
 // Validate implements the Validate Struct
 // NOTE: Fields within are not thread safe and that is on purpose
 // Functions and Tags should all be predifined before use, so subscribe to the philosiphy
@@ -30,11 +41,31 @@ type Config struct {
 // param   = parameter used in validation i.e. gt=0 param would be 0
 type Func func(top interface{}, current interface{}, f interface{}, param string) bool
 
+// ValidationErrors is a type of map[string]*FieldError
+// it exists to allow for multiple errors passed from this library
+// and yet still comply to the error interface
+type ValidationErrors map[string]*FieldError
+
+// This is intended for use in development + debugging and not intended to be a production error message.
+// It allows ValidationErrors to subscribe to the Error interface.
+// All information to create an error message specific to your application is contained within
+// the FieldError found in the ValidationErrors
+func (ve ValidationErrors) Error() string {
+
+	buff := bytes.NewBufferString("")
+
+	for key, err := range ve {
+		buff.WriteString(fmt.Sprintf(fieldErrMsg, key, err.Field, err.Tag))
+	}
+
+	return strings.TrimSpace(buff.String())
+}
+
 // FieldError contains a single field's validation error along
 // with other properties that may be needed for error message creation
 type FieldError struct {
 	Field string
-	// Tag              string
+	Tag   string
 	// Kind             reflect.Kind
 	// Type             reflect.Type
 	// Param            string
@@ -58,48 +89,36 @@ func New(config Config) *Validate {
 // NOTE: Nested Arrays, or Maps of structs do not get validated only the Array or Map itself; the reason is that there is no good
 // way to represent or report which struct within the array has the error, besides can validate the struct prior to adding it to
 // the Array or Map.
-func (v *Validate) Struct(s interface{}) map[string]*FieldError {
+func (v *Validate) Struct(current interface{}) ValidationErrors {
 
-	// var err *FieldError
 	errs := map[string]*FieldError{}
-	// errchan := make(chan *FieldError)
-	// done := make(chan bool)
-	// wg := &sync.WaitGroup{}
+	sv := reflect.ValueOf(current)
 
-	v.structRecursive(s, s, s, 0, errs)
+	v.structRecursive(sv, sv, "", errs)
 
-	// LOOP:
-	// 	for {
-	// 		select {
-	// 		case err := <-errchan:
-	// 			errs[err.Field] = err
-	// 			// fmt.Println(err)
-	// 		case <-done:
-	// 			// fmt.Println("All Done")
-	// 			break LOOP
-	// 		}
-	// 	}
+	if len(errs) == 0 {
+		return nil
+	}
 
 	return errs
 }
 
-func (v *Validate) structRecursive(top interface{}, current interface{}, s interface{}, depth int, errs map[string]*FieldError) {
+// func (v *Validate) structRecursive(top interface{}, current interface{}, s interface{}, errs map[string]*FieldError) {
 
-	errs["Name"] = &FieldError{Field: "Name"}
+func (v *Validate) structRecursive(top reflect.Value, current reflect.Value, errPrefix string, errs ValidationErrors) {
 
-	if depth < 3 {
-		// wg.Add(1)
-		v.structRecursive(s, s, s, depth+1, errs)
+	if current.Kind() == reflect.Ptr && !current.IsNil() {
+		current = current.Elem()
 	}
 
-	// wg.Wait()
+	if current.Kind() != reflect.Struct && current.Kind() != reflect.Interface {
+		panic("value passed for validation is not a struct")
+	}
 
-	// if depth == 0 {
-	// 	// wg.Wait()
-	// 	done <- true
-	// 	// return
-	// } else {
-	// 	// wg.Done()
+	// errs[errPrefix+"Name"] = &FieldError{Field: "Name", Tag: "required"}
+
+	// if depth < 3 {
+	// 	v.structRecursive(top, current, errs)
 	// }
 }
 

validator_test.go

@@ -213,6 +213,7 @@ func TestValidation(t *testing.T) {
 	errs := validate.Struct(tst)
 
 	fmt.Println(errs)
+	fmt.Println(errs == nil)
 }
 
 // func AssertStruct(t *testing.T, s *StructErrors, structFieldName string, expectedStructName string) *StructErrors {