kanban dashboard

internal/kanban/validation.go

@@ -0,0 +1,41 @@
+package kanban
+
+import (
+	"regexp"
+
+	"github.com/asaskevich/govalidator"
+)
+
+// ValidationService defines validation methods for kanban operations
+type ValidationService interface {
+	IsValidHexColor(hexColor string) bool
+}
+
+// validationService implements the ValidationService interface
+type validationService struct {
+	hexColorRegex *regexp.Regexp
+}
+
+// NewValidationService creates a new validation service
+func NewValidationService() ValidationService {
+	// Compile the hex color regex pattern (supports #RGB, #RRGGBB, #RRGGBBAA)
+	hexColorRegex := regexp.MustCompile(`^#([A-Fa-f0-9]{3}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{8})$`)
+
+	// Register custom validator with govalidator
+	govalidator.CustomTypeTagMap.Set("hexcolor", govalidator.CustomTypeValidator(func(i interface{}, o interface{}) bool {
+		hexColor, ok := i.(string)
+		if !ok {
+			return false
+		}
+		return hexColorRegex.MatchString(hexColor)
+	}))
+
+	return &validationService{
+		hexColorRegex: hexColorRegex,
+	}
+}
+
+// IsValidHexColor checks if a string is a valid hex color code
+func (v *validationService) IsValidHexColor(hexColor string) bool {
+	return v.hexColorRegex.MatchString(hexColor)
+}