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/*
* Copyright (C) 2024 Keith Cirkel <webkit@keithcirkel.co.uk>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ExceptionOr.h"
#include "ScriptWrappable.h"
#include "SubscriberCallback.h"
#include "VoidCallback.h"
#include <wtf/RefCounted.h>
namespace WebCore {
class DeferredPromise;
class InternalObserver;
class JSSubscriptionObserverCallback;
class MapperCallback;
class PredicateCallback;
class ReducerCallback;
class ScriptExecutionContext;
class VisitorCallback;
struct ObservableInspector;
struct SubscribeOptions;
struct SubscriptionObserver;
class Observable final : public ScriptWrappable, public RefCounted<Observable> {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(Observable);
public:
using ObserverUnion = std::variant<RefPtr<JSSubscriptionObserverCallback>, SubscriptionObserver>;
using InspectorUnion = std::variant<RefPtr<JSSubscriptionObserverCallback>, ObservableInspector>;
static Ref<Observable> create(Ref<SubscriberCallback>);
explicit Observable(Ref<SubscriberCallback>);
void subscribe(ScriptExecutionContext&, std::optional<ObserverUnion>, SubscribeOptions);
void subscribeInternal(ScriptExecutionContext&, Ref<InternalObserver>&&, const SubscribeOptions&);
Ref<Observable> map(ScriptExecutionContext&, MapperCallback&);
Ref<Observable> filter(ScriptExecutionContext&, PredicateCallback&);
Ref<Observable> take(ScriptExecutionContext&, uint64_t);
Ref<Observable> drop(ScriptExecutionContext&, uint64_t);
Ref<Observable> inspect(ScriptExecutionContext&, std::optional<InspectorUnion>&&);
// Promise-returning operators.
void first(ScriptExecutionContext&, const SubscribeOptions&, Ref<DeferredPromise>&&);
void forEach(ScriptExecutionContext&, Ref<VisitorCallback>&&, const SubscribeOptions&, Ref<DeferredPromise>&&);
void last(ScriptExecutionContext&, const SubscribeOptions&, Ref<DeferredPromise>&&);
void find(ScriptExecutionContext&, Ref<PredicateCallback>&&, const SubscribeOptions&, Ref<DeferredPromise>&&);
void every(ScriptExecutionContext&, Ref<PredicateCallback>&&, const SubscribeOptions&, Ref<DeferredPromise>&&);
void some(ScriptExecutionContext&, Ref<PredicateCallback>&&, const SubscribeOptions&, Ref<DeferredPromise>&&);
void reduce(ScriptExecutionContext&, Ref<ReducerCallback>&&, JSC::JSValue, const SubscribeOptions&, Ref<DeferredPromise>&&);
private:
Ref<SubscriberCallback> m_subscriberCallback;
};
} // namespace WebCore
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