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// Copyright 2016 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "database/src/common/query.h"
#include <cassert>
#include "app/src/assert.h"
#include "app/src/include/firebase/internal/platform.h"
#include "database/src/include/firebase/database.h"
#include "database/src/include/firebase/database/query.h"
// QueryInternal is defined in these 3 files, one implementation for each OS.
#if FIREBASE_PLATFORM_ANDROID
#include "database/src/android/database_android.h"
#include "database/src/android/query_android.h"
#elif FIREBASE_PLATFORM_IOS || FIREBASE_PLATFORM_TVOS
#include "database/src/ios/database_ios.h"
#include "database/src/ios/query_ios.h"
#elif defined(FIREBASE_TARGET_DESKTOP)
#include "database/src/desktop/database_desktop.h"
#include "database/src/desktop/query_desktop.h"
#else
#include "database/src/stub/database_stub.h"
#include "database/src/stub/query_stub.h"
#endif // FIREBASE_PLATFORM_ANDROID, FIREBASE_PLATFORM_IOS,
// FIREBASE_PLATFORM_TVOS, defined(FIREBASE_TARGET_DESKTOP)
#include "database/src/common/cleanup.h"
namespace firebase {
namespace database {
using internal::QueryInternal;
static Query GetInvalidQuery() { return Query(); }
typedef CleanupFn<Query, QueryInternal> CleanupFnQuery;
template <>
CleanupFnQuery::CreateInvalidObjectFn CleanupFnQuery::create_invalid_object =
GetInvalidQuery;
Query::Query(QueryInternal* internal) : internal_(internal) {
RegisterCleanup();
}
void Query::SetInternal(QueryInternal* internal) {
UnregisterCleanup();
if (internal_) delete internal_;
internal_ = internal;
RegisterCleanup();
}
void Query::RegisterCleanup() {
if (internal_) CleanupFnQuery::Register(this, internal_);
}
void Query::UnregisterCleanup() {
if (internal_) CleanupFnQuery::Unregister(this, internal_);
}
Query::Query(const Query& src)
: internal_(src.internal_ ? new QueryInternal(*src.internal_) : nullptr) {
RegisterCleanup();
}
Query& Query::operator=(const Query& src) {
SetInternal(src.internal_ ? new QueryInternal(*src.internal_) : nullptr);
return *this;
}
#if defined(FIREBASE_USE_MOVE_OPERATORS) || defined(DOXYGEN)
Query::Query(Query&& query) : internal_(query.internal_) {
query.UnregisterCleanup();
query.internal_ = nullptr;
RegisterCleanup();
}
Query& Query::operator=(Query&& query) {
QueryInternal* internal = query.internal_;
query.UnregisterCleanup();
query.internal_ = nullptr;
SetInternal(internal);
return *this;
}
#endif // defined(FIREBASE_USE_MOVE_OPERATORS) || defined(DOXYGEN)
bool operator==(const Query& lhs, const Query& rhs) {
if (!lhs.is_valid() && !rhs.is_valid()) return true; // both invalid
if (!lhs.is_valid() || !rhs.is_valid()) return false; // only one invalid
return lhs.internal_->query_spec() == rhs.internal_->query_spec();
}
Query::~Query() {
UnregisterCleanup();
if (internal_) delete internal_;
}
Future<DataSnapshot> Query::GetValue() {
if (internal_)
return internal_->GetValue();
else
return Future<DataSnapshot>();
}
Future<DataSnapshot> Query::GetValueLastResult() {
if (internal_)
return internal_->GetValueLastResult();
else
return Future<DataSnapshot>();
}
void Query::AddValueListener(ValueListener* listener) {
if (internal_ && listener) internal_->AddValueListener(listener);
}
void Query::RemoveValueListener(ValueListener* listener) {
// listener is allowed to be a nullptr. nullptr represents removing all
// listeners at this location.
if (internal_) internal_->RemoveValueListener(listener);
}
void Query::RemoveAllValueListeners() {
if (internal_) internal_->RemoveAllValueListeners();
}
void Query::AddChildListener(ChildListener* listener) {
if (internal_ && listener) internal_->AddChildListener(listener);
}
void Query::RemoveChildListener(ChildListener* listener) {
// listener is allowed to be a nullptr. nullptr represents removing all
// listeners at this location.
if (internal_) internal_->RemoveChildListener(listener);
}
void Query::RemoveAllChildListeners() {
if (internal_) internal_->RemoveAllChildListeners();
}
DatabaseReference Query::GetReference() const {
return internal_ ? DatabaseReference(internal_->GetReference())
: DatabaseReference(nullptr);
}
void Query::SetKeepSynchronized(bool keep_sync) {
if (internal_) internal_->SetKeepSynchronized(keep_sync);
}
Query Query::OrderByChild(const char* path) {
return internal_ && path ? Query(internal_->OrderByChild(path))
: Query(nullptr);
}
Query Query::OrderByChild(const std::string& path) {
return OrderByChild(path.c_str());
}
Query Query::OrderByKey() {
return internal_ ? Query(internal_->OrderByKey()) : Query(nullptr);
}
Query Query::OrderByPriority() {
return internal_ ? Query(internal_->OrderByPriority()) : Query(nullptr);
}
Query Query::OrderByValue() {
return internal_ ? Query(internal_->OrderByValue()) : Query(nullptr);
}
Query Query::StartAt(Variant order_value) {
return internal_ ? Query(internal_->StartAt(order_value)) : Query(nullptr);
}
Query Query::StartAt(Variant order_value, const char* child_key) {
return internal_ && child_key
? Query(internal_->StartAt(order_value, child_key))
: Query(nullptr);
}
Query Query::EndAt(Variant order_value) {
return internal_ ? Query(internal_->EndAt(order_value)) : Query(nullptr);
}
Query Query::EndAt(Variant order_value, const char* child_key) {
return internal_ && child_key
? Query(internal_->EndAt(order_value, child_key))
: Query(nullptr);
}
Query Query::EqualTo(Variant order_value) {
return internal_ ? Query(internal_->EqualTo(order_value)) : Query(nullptr);
}
Query Query::EqualTo(Variant order_value, const char* child_key) {
return internal_ && child_key
? Query(internal_->EqualTo(order_value, child_key))
: Query(nullptr);
}
Query Query::LimitToFirst(size_t limit) {
return internal_ ? Query(internal_->LimitToFirst(limit)) : Query(nullptr);
}
Query Query::LimitToLast(size_t limit) {
return internal_ ? Query(internal_->LimitToLast(limit)) : Query(nullptr);
}
bool Query::is_valid() const { return internal_ != nullptr; }
} // namespace database
} // namespace firebase