Merge redesign part 1.

lib/core/amount_validator.dart

@@ -3,10 +3,11 @@ import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/src/domain/common/wallet_type.dart';
 
 class AmountValidator extends TextValidator {
-  AmountValidator({WalletType type})
+  AmountValidator({WalletType type, bool isAutovalidate = false})
       : super(
             errorMessage: S.current.error_text_amount,
             pattern: _pattern(type),
+            isAutovalidate: isAutovalidate,
             minLength: 0,
             maxLength: 0);
 

lib/core/template_validator.dart

@@ -0,0 +1,12 @@
+import 'package:cake_wallet/core/validator.dart';
+import 'package:cake_wallet/generated/i18n.dart';
+
+class TemplateValidator extends TextValidator {
+  TemplateValidator()
+      : super(
+          minLength: 0,
+          maxLength: 0,
+          pattern: '''^[^`,'"]{1,20}\$''',
+          errorMessage: S.current.error_text_template
+        );
+}

lib/core/validator.dart

@@ -16,18 +16,20 @@ class TextValidator extends Validator<String> {
       this.maxLength,
       this.pattern,
       this.length,
+      this.isAutovalidate = false,
       String errorMessage})
       : super(errorMessage: errorMessage);
 
   final int minLength;
   final int maxLength;
   final List<int> length;
+  final bool isAutovalidate;
   String pattern;
 
   @override
   bool isValid(String value) {
     if (value == null || value.isEmpty) {
-      return true;
+      return isAutovalidate ? true : false;
     }
 
     return value.length > (minLength ?? 0) &&
@@ -42,4 +44,4 @@ class TextValidator extends Validator<String> {
 class WalletNameValidator extends TextValidator {
   WalletNameValidator()
       : super(minLength: 1, maxLength: 15, pattern: '^[a-zA-Z0-9_]\$');
-}
+}