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LibWeb: Implement WritableStreamDefaultWriter.close()

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Matthew Olsson 2023-04-02 10:41:03 -07:00 • committed by Linus Groh
parent 0c441fa7af
commit 5f4da20a56
Notes: sideshowbarker 2024-07-17 04:49:48 +09:00
5 changed files with 39 additions and 1 deletions
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23
Userland/Libraries/LibWeb/Streams/WritableStreamDefaultWriter.cpp
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@ -64,6 +64,29 @@ WebIDL::ExceptionOr<JS::GCPtr<JS::Object>> WritableStreamDefaultWriter::abort(JS
return TRY(writable_stream_default_writer_abort(*this, reason))->promise();
}
// https://streams.spec.whatwg.org/#default-writer-close
WebIDL::ExceptionOr<JS::GCPtr<JS::Object>> WritableStreamDefaultWriter::close()
{
auto& realm = this->realm();
// 1. Let stream be this.[[stream]].
// 2. If stream is undefined, return a promise rejected with a TypeError exception.
if (!m_stream) {
auto exception = MUST_OR_THROW_OOM(JS::TypeError::create(realm, "Cannot close a writer that has no locked stream"sv));
return WebIDL::create_rejected_promise(realm, exception)->promise();
}
// 3. If ! WritableStreamCloseQueuedOrInFlight(stream) is true, return a promise rejected with a TypeError exception.
if (writable_stream_close_queued_or_in_flight(*m_stream)) {
auto exception = MUST_OR_THROW_OOM(JS::TypeError::create(realm, "Cannot close a stream that is already closed or errored"sv));
return WebIDL::create_rejected_promise(realm, exception)->promise();
}
// 4. Return ! WritableStreamDefaultWriterClose(this).
return TRY(writable_stream_default_writer_close(*this))->promise();
}
WritableStreamDefaultWriter::WritableStreamDefaultWriter(JS::Realm& realm)
: Bindings::PlatformObject(realm)
{