add some examples and add more migration items

Author: ArturAssisComp

doc/migration.md

@@ -633,10 +633,35 @@ FormBuilderValidators.bic(regex: someRegex);
 // New API:
 Validators.bic(isBic: (input)=>someRegex.hasMatch(input));
 ```
-TODO continue from here!!!
-- `FormBuilderValidators.creditCardCVC()` - requires the field's value to be a valid credit card CVC number.
-- `FormBuilderValidators.creditCardExpirationDate()` - requires the field's value to be a valid credit card expiration date and can check if not expired yet.
-- `FormBuilderValidators.creditCard()` - requires the field's value to be a valid credit card number.
+- `FormBuilderValidators.creditCardCVC()`: there is no equivalent to [this validator](https://github.com/flutter-form-builder-ecosystem/form_builder_validators/blob/17e982bb849dc68365f8fbc93d5a2323ee891c89/lib/src/finance/credit_card_cvc_validator.dart#L29). Something close would be:
+```dart
+// Old API:
+FormBuilderValidators.creditCardCVC(
+  errorText: 'invalid CVC number'
+);
+
+// New API:
+Validators.and([
+  Validators.int(null, 'invalid CVC number'),
+  Validators.equalLength(3, equalLengthMsg: 'invalid CVC number'),
+]);
+```
+- `FormBuilderValidators.creditCardExpirationDate()`: there is no equivalent to [this validator](https://github.com/flutter-form-builder-ecosystem/form_builder_validators/blob/17e982bb849dc68365f8fbc93d5a2323ee891c89/lib/src/finance/credit_card_expiration_date_validator.dart#L52).
+- `FormBuilderValidators.creditCard()`
+```dart
+// Old API:
+FormBuilderValidators.creditCard(
+  errorText: 'invalid credit card',
+);
+
+// New API:
+Validators.creditCard(
+  creditCardMsg: 'invalid credit card',
+);
+
+```
+TODO continue from here!!!!
+
 - `FormBuilderValidators.iban()` - requires the field's to be a valid IBAN.
 
 ### Identity validators

example/lib/generic_examples.dart

@@ -64,15 +64,14 @@ class GenericExamplesPage extends StatelessWidget {
                 textInputAction: TextInputAction.next,
                 autovalidateMode: AutovalidateMode.always,
               ),
-              /* TODO implement the email and url validator
               // Email Validator
               TextFormField(
                 decoration: const InputDecoration(
                   labelText: 'Email Field',
                   prefixIcon: Icon(Icons.email),
                 ),
                 keyboardType: TextInputType.emailAddress,
-                validator: v.email(),
+                validator: V.required(V.email()),
                 autofillHints: const <String>[AutofillHints.email],
                 textInputAction: TextInputAction.next,
                 autovalidateMode: AutovalidateMode.always,
@@ -84,12 +83,11 @@ class GenericExamplesPage extends StatelessWidget {
                   prefixIcon: Icon(Icons.link),
                 ),
                 keyboardType: TextInputType.url,
-                validator: v.url(),
+                validator: V.required(V.url()),
                 autofillHints: const <String>[AutofillHints.url],
                 textInputAction: TextInputAction.next,
                 autovalidateMode: AutovalidateMode.always,
               ),
-               */
               // Min Length Validator
               TextFormField(
                 decoration: const InputDecoration(
@@ -142,19 +140,17 @@ class GenericExamplesPage extends StatelessWidget {
                 textInputAction: TextInputAction.next,
                 autovalidateMode: AutovalidateMode.always,
               ),
-              /* TODO implement contains substring
               // Contains Validator
               TextFormField(
                 decoration: const InputDecoration(
                   labelText: 'Contains "test"',
                   prefixIcon: Icon(Icons.search),
                 ),
-                validator: FormBuilderValidators.contains('test'),
+                validator: V.required(V.contains('test')),
                 textInputAction: TextInputAction.next,
                 autovalidateMode: AutovalidateMode.always,
               ),
 
-               */
               // Match Validator
               TextFormField(
                 decoration: const InputDecoration(
@@ -165,15 +161,14 @@ class GenericExamplesPage extends StatelessWidget {
                 textInputAction: TextInputAction.next,
                 autovalidateMode: AutovalidateMode.always,
               ),
-              /* TODO implement id, uuid, credit cart, and phone number validators
               // IP Validator
               TextFormField(
                 decoration: const InputDecoration(
                   labelText: 'IP Field',
                   prefixIcon: Icon(Icons.computer),
                 ),
                 keyboardType: TextInputType.number,
-                validator: v.ip(),
+                validator: V.required(V.ip()),
                 textInputAction: TextInputAction.next,
                 autovalidateMode: AutovalidateMode.always,
               ),
@@ -184,7 +179,7 @@ class GenericExamplesPage extends StatelessWidget {
                   labelText: 'UUID Field',
                   prefixIcon: Icon(Icons.code),
                 ),
-                validator: v.uuid(),
+                validator: V.required(V.uuid()),
                 textInputAction: TextInputAction.next,
                 autovalidateMode: AutovalidateMode.always,
               ),
@@ -195,11 +190,12 @@ class GenericExamplesPage extends StatelessWidget {
                   prefixIcon: Icon(Icons.credit_card),
                 ),
                 keyboardType: TextInputType.number,
-                validator: FormBuilderValidators.creditCard(),
+                validator: V.required(V.creditCard()),
                 autofillHints: const <String>[AutofillHints.creditCardNumber],
                 textInputAction: TextInputAction.next,
                 autovalidateMode: AutovalidateMode.always,
               ),
+              /* TODO implement id, uuid, credit cart, and phone number validators
               // Phone Number Validator
               TextFormField(
                 decoration: const InputDecoration(
@@ -237,6 +233,21 @@ class GenericExamplesPage extends StatelessWidget {
                 textInputAction: TextInputAction.done,
                 autovalidateMode: AutovalidateMode.always,
               ),
+              TextFormField(
+                decoration: const InputDecoration(
+                  labelText: 'CVC number validator',
+                  prefixIcon: Icon(Icons.numbers),
+                ),
+                keyboardType: TextInputType.number,
+                validator: V.required(
+                  V.and(<Validator<String>>[
+                    V.int(),
+                    V.equalLength(3),
+                  ]),
+                ),
+                textInputAction: TextInputAction.done,
+                autovalidateMode: AutovalidateMode.always,
+              ),
             ],
           ),
         ),