validator_forge

Description:

validator forge

Validator Forge #
Validator Forge is a Flutter package that provides a set of commonly used validation functions. It includes pre-defined validators for required fields, email, phone number, URL, passwords, and more. The package also supports custom regular expression validators.
Installation #
Add the following dependency to your pubspec.yaml file:
dependencies:
validator_forge: ^1.0.0
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Then, run flutter pub get to install the package.
Usage #
To use the validators, simply import the package and use the desired validation methods.
import 'package:validator_forge/validator_forge.dart';

class MyFormState extends State<MyForm> {
final _formKey = GlobalKey<FormState>();
String? _email;
String? _password;

@override
Widget build(BuildContext context) {
return Form(
key: _formKey,
child: Column(
children: <Widget>[
TextFormField(
decoration: InputDecoration(labelText: 'Email'),
validator: (value) => Validators.emailValidator(value),
onSaved: (value) => _email = value,
),
TextFormField(
decoration: InputDecoration(labelText: 'Password'),
validator: (value) => Validators.passwordValidator(value),
onSaved: (value) => _password = value,
),
ElevatedButton(
onPressed: () {
if (_formKey.currentState!.validate()) {
_formKey.currentState!.save();
// Process data.
}
},
child: Text('Submit'),
),
],
),
);
}
}

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Validators #
This package provides a comprehensive set of validation functions to ensure your forms meet various requirements. Here is a list of available validators:


requiredValidator(String? value) Ensures that the field is not empty.


customRegexValidator(String? value, String pattern, String errorMessage)
Validates the field against a custom regular expression.


emailValidator(String? value)
Checks if the field contains a valid email address.


phoneValidator(String? value)
Ensures the field contains a valid phone number.


urlValidator(String? value)
Verifies that the field contains a valid URL.


passwordValidator(String? value)
Ensures the field contains a password with at least 8 characters.


minLengthValidator(String? value, int minLength)
Checks that the field contains a minimum number of characters.


maxLengthValidator(String? value, int maxLength)
Verifies that the field contains a maximum number of characters.


numberValidator(String? value)
Validates that the field contains a valid number.


matchValidator(String? value, String? compareTo)
Ensures that the field matches another value.


dateValidator(String? value)
Checks if the field contains a date in the format YYYY-MM-DD.


Validator Builder #
You can use the validatorBuilder function to combine multiple validators. The function returns the first validation error it encounters.

TextFormField(
decoration: InputDecoration(labelText: 'Email'),
validator: (value) => validatorBuilder([
() => Validators.requiredValidator(value),
() => Validators.emailValidator(value),
]),
onSaved: (value) => _email = value,
);

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Contributing #
Contributions are welcome! Please feel free to submit a pull request or open an issue on GitHub.
License #
This project is licensed under the MIT License.# validator_forge