Fixed Cron.ValidUntil using incorrect ISO8601 parsing format (#187)

Signed-off-by: Venera <31911811+venera-program@users.noreply.github.com>

Author: venera-program

go.mod

@@ -5,6 +5,7 @@ go 1.19
 require (
 	github.com/go-playground/validator/v10 v10.11.1
 	github.com/pkg/errors v0.9.1
+	github.com/relvacode/iso8601 v1.3.0
 	github.com/senseyeio/duration v0.0.0-20180430131211-7c2a214ada46
 	github.com/stretchr/testify v1.8.0
 	gopkg.in/yaml.v3 v3.0.1

go.sum

@@ -45,6 +45,8 @@ github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/relvacode/iso8601 v1.3.0 h1:HguUjsGpIMh/zsTczGN3DVJFxTU/GX+MMmzcKoMO7ko=
+github.com/relvacode/iso8601 v1.3.0/go.mod h1:FlNp+jz+TXpyRqgmM7tnzHHzBnz776kmAH2h3sZCn0I=
 github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
 github.com/rogpeppe/go-internal v1.8.0 h1:FCbCCtXNOY3UtUuHUYaghJg4y7Fd14rXifAYUAtL9R8=
 github.com/rogpeppe/go-internal v1.8.0/go.mod h1:WmiCO8CzOY8rg0OYDC4/i/2WRWAB6poM+XZ2dLUbcbE=

model/workflow.go

@@ -372,7 +372,7 @@ type Cron struct {
 	Expression string `json:"expression" validate:"required"`
 	// Specific date and time (ISO 8601 format) when the cron expression is no longer valid.
 	// +optional
-	ValidUntil string `json:"validUntil,omitempty" validate:"omitempty,iso8601duration"`
+	ValidUntil string `json:"validUntil,omitempty" validate:"omitempty,iso8601datetime"`
 }
 
 type cronUnmarshal Cron

validator/validator.go

@@ -18,6 +18,7 @@ import (
 	"context"
 	"strconv"
 
+	"github.com/relvacode/iso8601"
 	"github.com/senseyeio/duration"
 	"k8s.io/apimachinery/pkg/util/intstr"
 
@@ -41,6 +42,11 @@ func init() {
 		panic(err)
 	}
 
+	err = validate.RegisterValidationCtx("iso8601datetime", validateISO8601DatetimeFunc)
+	if err != nil {
+		panic(err)
+	}
+
 	err = validate.RegisterValidation("oneofkind", oneOfKind)
 	if err != nil {
 		panic(err)
@@ -63,6 +69,17 @@ func validateISO8601TimeDurationFunc(_ context.Context, fl validator.FieldLevel)
 	return err == nil
 }
 
+// ValidateISO8601Datetime validate the string is iso8601 Datetime format
+func ValidateISO8601Datetime(s string) error {
+	_, err := iso8601.ParseString(s)
+	return err
+}
+
+func validateISO8601DatetimeFunc(_ context.Context, fl validator.FieldLevel) bool {
+	err := ValidateISO8601Datetime(fl.Field().String())
+	return err == nil
+}
+
 func oneOfKind(fl validator.FieldLevel) bool {
 	if val, ok := fl.Field().Interface().(Kind); ok {
 		for _, value := range val.KindValues() {

validator/validator_test.go

@@ -59,6 +59,54 @@ func TestValidateISO8601TimeDuration(t *testing.T) {
 	}
 }
 
+func TestValidateISO8601Timestamp(t *testing.T) {
+	type testCase struct {
+		desp string
+		s    string
+		err  string
+	}
+	testCases := []testCase{
+		{
+			desp: "workflow_spec_example",
+			s:    "2021-11-05T08:15:30-05:00",
+			err:  ``,
+		},
+		{
+			desp: "datetime",
+			s:    "2023-09-08T20:15:46+00:00",
+			err:  ``,
+		},
+		{
+			desp: "date",
+			s:    "2023-09-08",
+			err:  ``,
+		},
+		{
+			desp: "time",
+			s:    "13:15:33.074-07:00",
+			err:  "iso8601: Unexpected character `:`",
+		},
+		{
+			desp: "empty value",
+			s:    "",
+			err:  `iso8601: Cannot parse "": month 0 is not in range 1-12`,
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.desp, func(t *testing.T) {
+			err := ValidateISO8601Datetime(tc.s)
+
+			if tc.err != "" {
+				assert.Error(t, err)
+				assert.Regexp(t, tc.err, err)
+				return
+			}
+
+			assert.NoError(t, err)
+		})
+	}
+}
+
 type testKind string
 
 func (k testKind) KindValues() []string {