Set gist URL and title via push options (#216)

internal/utils/validator.go

@@ -0,0 +1,74 @@
+package utils
+
+import (
+	"github.com/go-playground/validator/v10"
+	"regexp"
+	"strings"
+)
+
+type OpengistValidator struct {
+	v *validator.Validate
+}
+
+func NewValidator() *OpengistValidator {
+	v := validator.New()
+	_ = v.RegisterValidation("notreserved", validateReservedKeywords)
+	_ = v.RegisterValidation("alphanumdash", validateAlphaNumDash)
+	_ = v.RegisterValidation("alphanumdashorempty", validateAlphaNumDashOrEmpty)
+	return &OpengistValidator{v}
+}
+
+func (cv *OpengistValidator) Validate(i interface{}) error {
+	return cv.v.Struct(i)
+}
+
+func (cv *OpengistValidator) Var(field interface{}, tag string) error {
+	return cv.v.Var(field, tag)
+}
+
+func ValidationMessages(err *error) string {
+	errs := (*err).(validator.ValidationErrors)
+	messages := make([]string, len(errs))
+	for i, e := range errs {
+		switch e.Tag() {
+		case "max":
+			messages[i] = e.Field() + " is too long"
+		case "required":
+			messages[i] = e.Field() + " should not be empty"
+		case "excludes":
+			messages[i] = e.Field() + " should not include a sub directory"
+		case "alphanum":
+			messages[i] = e.Field() + " should only contain alphanumeric characters"
+		case "alphanumdash":
+		case "alphanumdashorempty":
+			messages[i] = e.Field() + " should only contain alphanumeric characters and dashes"
+		case "min":
+			messages[i] = "Not enough " + e.Field()
+		case "notreserved":
+			messages[i] = "Invalid " + e.Field()
+		}
+	}
+
+	return strings.Join(messages, " ; ")
+}
+
+func validateReservedKeywords(fl validator.FieldLevel) bool {
+	name := fl.Field().String()
+
+	restrictedNames := map[string]struct{}{}
+	for _, restrictedName := range []string{"assets", "register", "login", "logout", "settings", "admin-panel", "all", "search", "init", "healthcheck"} {
+		restrictedNames[restrictedName] = struct{}{}
+	}
+
+	// if the name is not in the restricted names, it is valid
+	_, ok := restrictedNames[name]
+	return !ok
+}
+
+func validateAlphaNumDash(fl validator.FieldLevel) bool {
+	return regexp.MustCompile(`^[a-zA-Z0-9-]+$`).MatchString(fl.Field().String())
+}
+
+func validateAlphaNumDashOrEmpty(fl validator.FieldLevel) bool {
+	return regexp.MustCompile(`^$|^[a-zA-Z0-9-]+$`).MatchString(fl.Field().String())
+}