TF-3985 Navigate Paywall url when click Increase your space button

lib/features/paywall/domain/model/paywall_url_pattern.dart

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+import 'package:core/utils/mail/domain.dart';
+import 'package:core/utils/mail/mail_address.dart';
+import 'package:equatable/equatable.dart';
+import 'package:get/get.dart';
+import 'package:tmail_ui_user/features/paywall/presentation/paywall_utils.dart';
+
+class PaywallUrlPattern with EquatableMixin {
+  final String pattern;
+
+  PaywallUrlPattern(this.pattern);
+
+  String getQualifiedUrl({required String ownerEmail, String? domainName}) {
+    final mailAddress = _getMailAddress(ownerEmail: ownerEmail);
+    return PaywallUtils.buildPaywallUrlFromTemplate(
+      template: pattern,
+      localPart: mailAddress?.localPart,
+      domainName: mailAddress?.domain.domainName,
+    );
+  }
+
+  MailAddress? _getMailAddress({required String ownerEmail}) {
+    try {
+      return MailAddress.validateAddress(ownerEmail);
+    } catch (e) {
+      if (GetUtils.isEmail(ownerEmail)) {
+        final listPart = ownerEmail.split('@');
+        if (listPart.length == 2) {
+          return MailAddress(
+            localPart: listPart.first,
+            domain: Domain.of((listPart.last)),
+          );
+        }
+      }
+      return null;
+    }
+  }
+
+  @override
+  List<Object> get props => [pattern];
+}

lib/features/paywall/domain/repository/paywall_repository.dart

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+import 'package:tmail_ui_user/features/paywall/domain/model/paywall_url_pattern.dart';
+
+abstract class PaywallRepository {
+  Future<PaywallUrlPattern> getPaywallUrl(String baseUrl);
+}

lib/features/paywall/domain/state/get_paywall_url_state.dart

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+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:tmail_ui_user/features/paywall/domain/model/paywall_url_pattern.dart';
+
+class GettingPaywallUrl extends LoadingState {}
+
+class GetPaywallUrlSuccess extends UIState {
+  final PaywallUrlPattern paywallUrlPattern;
+
+  GetPaywallUrlSuccess(this.paywallUrlPattern);
+
+  @override
+  List<Object> get props => [paywallUrlPattern];
+}
+
+class GetPaywallUrlFailure extends FeatureFailure {
+  GetPaywallUrlFailure(dynamic exception) : super(exception: exception);
+}

lib/features/paywall/domain/usecases/get_paywall_url_interactor.dart

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+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:dartz/dartz.dart';
+import 'package:tmail_ui_user/features/paywall/domain/repository/paywall_repository.dart';
+import 'package:tmail_ui_user/features/paywall/domain/state/get_paywall_url_state.dart';
+
+class GetPaywallUrlInteractor {
+  final PaywallRepository _paywallRepository;
+
+  GetPaywallUrlInteractor(this._paywallRepository);
+
+  Stream<Either<Failure, Success>> execute(String baseUrl) async* {
+    try {
+      yield Right(GettingPaywallUrl());
+      final paywallUrl = await _paywallRepository.getPaywallUrl(baseUrl);
+      yield Right(GetPaywallUrlSuccess(paywallUrl));
+    } catch (e) {
+      yield Left(GetPaywallUrlFailure(e));
+    }
+  }
+}