TF-48 Implement compose and send email with simple text

lib/features/composer/domain/model/email_request.dart

@@ -0,0 +1,17 @@
+
+import 'package:equatable/equatable.dart';
+import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+import 'package:jmap_dart_client/jmap/mail/mailbox/mailbox.dart';
+
+class EmailRequest with EquatableMixin {
+
+  final Email email;
+  final Id submissionCreateId;
+  final MailboxId? mailboxIdSaved;
+
+  EmailRequest(this.email, this.submissionCreateId, {this.mailboxIdSaved});
+
+  @override
+  List<Object?> get props => [email, submissionCreateId, mailboxIdSaved];
+}

lib/features/composer/domain/state/send_email_state.dart

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+import 'package:core/core.dart';
+
+class SendEmailSuccess extends UIState {
+
+  SendEmailSuccess();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class SendEmailFailure extends FeatureFailure {
+  final exception;
+
+  SendEmailFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}

lib/features/composer/domain/usecases/send_email_interactor.dart

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+import 'package:core/core.dart';
+import 'package:dartz/dartz.dart';
+import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:tmail_ui_user/features/composer/domain/model/email_request.dart';
+import 'package:tmail_ui_user/features/composer/domain/state/send_email_state.dart';
+import 'package:tmail_ui_user/features/email/domain/repository/email_repository.dart';
+
+class SendEmailInteractor {
+  final EmailRepository emailRepository;
+
+  SendEmailInteractor(this.emailRepository);
+
+  Stream<Either<Failure, Success>> execute(AccountId accountId, EmailRequest emailRequest) async* {
+    try {
+      yield Right<Failure, Success>(UIState.loading);
+      final result = await emailRepository.sendEmail(accountId, emailRequest);
+      if (result) {
+        yield Right<Failure, Success>(SendEmailSuccess());
+      } else {
+        yield Left(SendEmailFailure(result));
+      }
+    } catch (e) {
+      yield Left(SendEmailFailure(e));
+    }
+  }
+}