Add email not blacklisted validator

Signed-off-by: Émile Ré <nemile.re@gmail.com>

pkg/validator/validator_email.go

@@ -1 +1,47 @@
 package validator
+
+import (
+	_ "embed"
+	"strings"
+)
+
+var (
+	//go:embed data/disposable-email-domains/disposable_email_blocklist.conf
+	disposableEmailsRaw []byte
+	testEmails          = []string{
+		"acme.com",
+		"acme.net",
+		"acme.org",
+		"ethereal.email",
+		"example.com",
+		"example.net",
+		"example.org",
+		"mailhog.local",
+		"mailslurp.com",
+		"test.com",
+		"test.net",
+		"test.org",
+		"localhost.localdomain",
+	}
+	blacklistedEmails = append(
+		strings.Split(strings.TrimSpace(string(disposableEmailsRaw)), "\n"),
+		testEmails...,
+	)
+)
+
+func NotBlacklisted() ValidatorFunc {
+	notOneOfSlice := NotOneOfSlice(blacklistedEmails)
+
+	return func(value any) *ValidationError {
+		err := notOneOfSlice(value)
+
+		if err == nil {
+			return newValidationError(
+				ErrorCodeInvalidEnum,
+				"must not be blacklisted",
+			)
+		}
+
+		return nil
+	}
+}

pkg/validator/validator_format.go

@@ -22,7 +22,6 @@ import (
 )
 
 var (
-	emailRegex  = regexp.MustCompile(`^[a-zA-Z0-9._%+\-]+@[a-zA-Z0-9.\-]+\.[a-zA-Z]{2,}$`)
 	uuidRegex   = regexp.MustCompile(`^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$`)
 	domainRegex = regexp.MustCompile(`^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)*[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$`)
 )