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/*
* Copyright (C) 2017 Apple Inc. 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 <wtf/HashTraits.h>
#include <wtf/Hasher.h>
#include <wtf/ObjectIdentifier.h>
#include <wtf/UUID.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
enum PushSubscriptionIdentifierType { };
using PushSubscriptionIdentifier = ObjectIdentifier<PushSubscriptionIdentifierType>;
struct PushSubscriptionSetIdentifier {
String bundleIdentifier;
String pushPartition;
Markable<WTF::UUID> dataStoreIdentifier;
bool operator==(const PushSubscriptionSetIdentifier&) const;
void add(Hasher&, const PushSubscriptionSetIdentifier&);
bool isHashTableDeletedValue() const;
PushSubscriptionSetIdentifier isolatedCopy() const &;
PushSubscriptionSetIdentifier isolatedCopy() &&;
WEBCORE_EXPORT String debugDescription() const;
};
WEBCORE_EXPORT String makePushTopic(const PushSubscriptionSetIdentifier&, const String& scope);
inline bool PushSubscriptionSetIdentifier::operator==(const PushSubscriptionSetIdentifier& other) const
{
// Treat null and empty strings as empty strings for the purposes of hashing and comparison. The
// reason for this is that null and empty strings are stored as empty strings in PushDatabase
// (the columns are marked NOT NULL). We want to be able to compare instances that use null
// strings with instances deserialized from the database that use empty strings.
auto makeNotNull = [](const String& s) -> const String& {
return s.isNull() ? emptyString() : s;
};
return makeNotNull(bundleIdentifier) == makeNotNull(other.bundleIdentifier) && makeNotNull(pushPartition) == makeNotNull(other.pushPartition) && dataStoreIdentifier == other.dataStoreIdentifier;
}
inline void add(Hasher& hasher, const PushSubscriptionSetIdentifier& sub)
{
// Treat null and empty strings as empty strings for the purposes of hashing and comparison. See
// the comment in operator== for more explanation.
auto makeNotNull = [](const String& s) -> const String& {
return s.isNull() ? emptyString() : s;
};
if (sub.dataStoreIdentifier)
return add(hasher, makeNotNull(sub.bundleIdentifier), makeNotNull(sub.pushPartition), sub.dataStoreIdentifier.value());
return add(hasher, makeNotNull(sub.bundleIdentifier), makeNotNull(sub.pushPartition));
}
inline bool PushSubscriptionSetIdentifier::isHashTableDeletedValue() const
{
return dataStoreIdentifier && dataStoreIdentifier->isHashTableDeletedValue();
}
inline PushSubscriptionSetIdentifier PushSubscriptionSetIdentifier::isolatedCopy() const &
{
return { bundleIdentifier.isolatedCopy(), pushPartition.isolatedCopy(), dataStoreIdentifier };
}
inline PushSubscriptionSetIdentifier PushSubscriptionSetIdentifier::isolatedCopy() &&
{
return { WTFMove(bundleIdentifier).isolatedCopy(), WTFMove(pushPartition).isolatedCopy(), dataStoreIdentifier };
}
} // namespace WebCore
namespace WTF {
struct PushSubscriptionSetIdentifierHash {
static unsigned hash(const WebCore::PushSubscriptionSetIdentifier& key) { return computeHash(key); }
static bool equal(const WebCore::PushSubscriptionSetIdentifier& a, const WebCore::PushSubscriptionSetIdentifier& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
template<> struct DefaultHash<WebCore::PushSubscriptionSetIdentifier> : PushSubscriptionSetIdentifierHash { };
template<> struct HashTraits<WebCore::PushSubscriptionSetIdentifier> : GenericHashTraits<WebCore::PushSubscriptionSetIdentifier> {
static const bool emptyValueIsZero = false;
static WebCore::PushSubscriptionSetIdentifier emptyValue() { return { emptyString(), emptyString(), std::nullopt }; }
static void constructDeletedValue(WebCore::PushSubscriptionSetIdentifier& slot) { new (NotNull, &slot) WebCore::PushSubscriptionSetIdentifier { emptyString(), emptyString(), WTF::UUID { HashTableDeletedValue } }; }
static bool isDeletedValue(const WebCore::PushSubscriptionSetIdentifier& value) { return value.isHashTableDeletedValue(); }
};
} // namespace WTF
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