43 lines
1.9 KiB
Dart
43 lines
1.9 KiB
Dart
import 'package:matcher/matcher.dart';
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final RegExp _alphaDash = new RegExp(r'^[A-Za-z0-9_-]+$');
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final RegExp _alphaNum = new RegExp(r'^[A-Za-z0-9]+$');
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final RegExp _email = new RegExp(
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r"^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$");
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final RegExp _url = new RegExp(
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r'https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)');
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/// Asserts that a `String` is alphanumeric, but also lets it contain dashes or underscores.
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final Matcher isAlphaDash = predicate(
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(value) => value is String && _alphaDash.hasMatch(value),
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'alphanumeric (dashes and underscores are allowed)');
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/// Asserts that a `String` is alphanumeric, but also lets it contain dashes or underscores.
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final Matcher isAlphaNum = predicate(
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(value) => value is String && _alphaNum.hasMatch(value), 'alphanumeric');
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/// Asserts that a value either equals `true` or `false`.
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final Matcher isBool = predicate((value) => value is bool, 'a bool');
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/// Asserts that a `String` complies to the RFC 5322 e-mail standard.
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final Matcher isEmail = predicate(
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(value) => value is String && _email.hasMatch(value), 'a valid e-mail');
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/// Asserts that a value is an `int`.
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final Matcher isInt = predicate((value) => value is int, 'an integer');
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/// Asserts that a value is a `num`.
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final Matcher isNum = predicate((value) => value is num, 'a number');
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/// Asserts that a value is a `String`.
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final Matcher isString = predicate((value) => value is String, 'a String');
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/// Asserts that a `String` is an `http://` or `https://` URL.
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///
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/// The regular expression used:
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/// ```
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/// https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)
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/// ```
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final Matcher isurl = predicate(
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(value) => value is String && _url.hasMatch(value),
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'a valid url, starting with http:// or https://');
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