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LibWeb: Implement WritableStream.close()

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This commit is contained in:
Matthew Olsson 2023-04-02 08:19:10 -07:00 • committed by Linus Groh
parent d4e48db1e1
commit 5faa0014f2
5 changed files with 464 additions and 1 deletions
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21
Userland/Libraries/LibWeb/Streams/WritableStream.cpp
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@ -55,6 +55,27 @@ bool WritableStream::locked() const
return is_writable_stream_locked(*this);
}
// https://streams.spec.whatwg.org/#ws-close
WebIDL::ExceptionOr<JS::GCPtr<JS::Object>> WritableStream::close()
{
auto& realm = this->realm();
// 1. If ! IsWritableStreamLocked(this) is true, return a promise rejected with a TypeError exception.
if (is_writable_stream_locked(*this)) {
auto exception = MUST_OR_THROW_OOM(JS::TypeError::create(realm, "Cannot close a locked stream"sv));
return WebIDL::create_rejected_promise(realm, exception)->promise();
}
// 2. If ! WritableStreamCloseQueuedOrInFlight(this) is true, return a promise rejected with a TypeError exception.
if (writable_stream_close_queued_or_in_flight(*this)) {
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();
}
// 3. Return ! WritableStreamClose(this).
return TRY(writable_stream_close(*this))->promise();
}
WritableStream::WritableStream(JS::Realm& realm)
: Bindings::PlatformObject(realm)
{