39 lines
969 B
Dart
39 lines
969 B
Dart
bool isValidUsername({required String name}) {
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if (name.isEmpty) {
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return false;
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}
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return RegExp(r".+\@.+\..+").hasMatch(cleanUpUsername(name: name));
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}
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String cleanUpUsername({required String name}) {
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name = name.replaceAll(" ", "");
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if (name.isNotEmpty) {
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if (name[0] == "@") {
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name = name.substring(1);
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}
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}
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return name;
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}
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String urlFromUsername({required String name}) {
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name = cleanUpUsername(name: name);
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return name.substring(name.indexOf("@") + 1);
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}
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String userFromUsername({required String name}) {
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name = cleanUpUsername(name: name);
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return name.substring(0, name.indexOf("@"));
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}
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// A fully qualified and valid username for example (@)hello@world.com
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// The first @ is ignored
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class Username {
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late final String user;
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late final String url;
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Username(String username) {
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assert(isValidUsername(name: username));
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user = userFromUsername(name: username);
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url = urlFromUsername(name: username);
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}
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}
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