extensions/browser/api/storage/session_storage_manager.cc - chromium/src.git - Git at Google

 // Copyright 2021 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "extensions/browser/api/storage/session_storage_manager.h"

 #include "base/trace_event/memory_usage_estimator.h"
 #include "extensions/common/api/storage.h"

 using base::trace_event::EstimateMemoryUsage;

 namespace extensions {

 // Implementation of SessionValue.
 SessionStorageManager::SessionValue::SessionValue(base::Value value,
                                                   size_t size)
     : value(std::move(value)), size(size) {}

 // Implementation of ValueChange.
 SessionStorageManager::ValueChange::ValueChange(
     std::string key,
     base::Optional<base::Value> old_value,
     base::Value* new_value)
     : key(key), old_value(std::move(old_value)), new_value(new_value) {}

 SessionStorageManager::ValueChange::~ValueChange() = default;

 SessionStorageManager::ValueChange::ValueChange(ValueChange&& other) = default;

 // Implementation of ExtensionStorage.
 SessionStorageManager::ExtensionStorage::ExtensionStorage(size_t quota_bytes)
     : quota_bytes_(quota_bytes) {}

 SessionStorageManager::ExtensionStorage::~ExtensionStorage() = default;

 size_t SessionStorageManager::ExtensionStorage::CalculateUsage(
     std::map<std::string, base::Value> input_values,
     std::map<std::string, std::unique_ptr<SessionValue>>& session_values)
     const {
   size_t updated_used_total = used_total_;

   for (auto& input_it : input_values) {
     size_t input_size = EstimateMemoryUsage(input_it.first) +
                         EstimateMemoryUsage(input_it.second);
     updated_used_total += input_size;

     // Remove session value size of existent key from total used bytes.
     auto existent_value_it = values_.find(input_it.first);
     if (existent_value_it != values_.end()) {
       // `updated_used_total` is guaranteed to be at least as large as any
       // individual value that's already in the map.
       DCHECK_GE(updated_used_total, existent_value_it->second->size);
       updated_used_total -= existent_value_it->second->size;
     }

     // Add input to the session values map.
     session_values.emplace(
         std::move(input_it.first),
         std::make_unique<SessionValue>(std::move(input_it.second), input_size));
   }

   if (updated_used_total >= quota_bytes_) {
     session_values.clear();
     return quota_bytes_;
   }

   return updated_used_total;
 }

 std::map<std::string, const base::Value*>
 SessionStorageManager::ExtensionStorage::Get(
     const std::vector<std::string>& keys) const {
   std::map<std::string, const base::Value*> values;
   for (auto& key : keys) {
     auto value_it = values_.find(key);
     if (value_it != values_.end())
       values.emplace(key, &value_it->second->value);
   }
   return values;
 }

 std::map<std::string, const base::Value*>
 SessionStorageManager::ExtensionStorage::GetAll() const {
   std::map<std::string, const base::Value*> values;
   for (auto& value : values_) {
     values.emplace(value.first, &value.second->value);
   }
   return values;
 }

 bool SessionStorageManager::ExtensionStorage::Set(
     std::map<std::string, base::Value> input_values,
     std::vector<ValueChange>& changes) {
   std::map<std::string, std::unique_ptr<SessionValue>> session_values;
   size_t updated_used_total =
       CalculateUsage(std::move(input_values), session_values);
   if (updated_used_total == quota_bytes_)
     return false;

   // Insert values in storage map and update total bytes.
   for (auto& session_value : session_values) {
     // Do nothing if key's existent value is the same as the new value.
     auto& existent_value = values_[session_value.first];
     if (existent_value && existent_value->value == session_value.second->value)
       continue;

     // Add the change to the changes list.
     ValueChange change(session_value.first,
                        existent_value ? base::Optional<base::Value>(
                                             std::move(existent_value->value))
                                       : base::nullopt,
                        &session_value.second->value);
     changes.push_back(std::move(change));

     existent_value = std::move(session_value.second);
   }
   used_total_ = updated_used_total;
   return true;
 }

 void SessionStorageManager::ExtensionStorage::Remove(
     const std::vector<std::string>& keys,
     std::vector<ValueChange>& changes) {
   for (auto& key : keys) {
     auto value_it = values_.find(key);
     if (value_it == values_.end())
       continue;

     // Add the change to the changes list.
     ValueChange change(
         key, base::Optional<base::Value>(std::move(value_it->second->value)),
         nullptr);
     changes.push_back(std::move(change));

     used_total_ -= value_it->second->size;
     values_.erase(value_it);
   }
 }

 void SessionStorageManager::ExtensionStorage::Clear(
     std::vector<ValueChange>& changes) {
   for (auto& value : values_) {
     ValueChange change(
         value.first,
         base::Optional<base::Value>(std::move(value.second->value)), nullptr);
     changes.push_back(std::move(change));
   }

   used_total_ = 0;
   values_.clear();
 }

 size_t SessionStorageManager::ExtensionStorage::GetBytesInUse(
     const std::vector<std::string>& keys) const {
   size_t total = 0;
   for (const auto& key : keys) {
     auto value_it = values_.find(key);
     if (value_it != values_.end())
       total += value_it->second->size;
   }
   return total;
 }

 size_t SessionStorageManager::ExtensionStorage::GetTotalBytesInUse() const {
   return used_total_;
 }

 // Implementation of SessionStorageManager.
 SessionStorageManager::SessionStorageManager(size_t quota_bytes_per_extension)
     : quota_bytes_per_extension_(quota_bytes_per_extension) {}

 SessionStorageManager::~SessionStorageManager() = default;

 const base::Value* SessionStorageManager::Get(const ExtensionId& extension_id,
                                               const std::string& key) const {
   std::map<std::string, const base::Value*> values =
       Get(extension_id, std::vector<std::string>(1, key));
   if (values.empty())
     return nullptr;

   // Only a single value should be returned.
   DCHECK_EQ(1u, values.size());
   return values.begin()->second;
 }

 std::map<std::string, const base::Value*> SessionStorageManager::Get(
     const ExtensionId& extension_id,
     const std::vector<std::string>& keys) const {
   auto storage_it = extensions_storage_.find(extension_id);
   if (storage_it == extensions_storage_.end()) {
     return std::map<std::string, const base::Value*>();
   }

   return storage_it->second->Get(keys);
 }

 std::map<std::string, const base::Value*> SessionStorageManager::GetAll(
     const ExtensionId& extension_id) const {
   auto storage_it = extensions_storage_.find(extension_id);
   if (storage_it == extensions_storage_.end()) {
     return std::map<std::string, const base::Value*>();
   }

   return storage_it->second->GetAll();
 }

 bool SessionStorageManager::Set(const ExtensionId& extension_id,
                                 std::map<std::string, base::Value> input_values,
                                 std::vector<ValueChange>& changes) {
   auto& storage = extensions_storage_[extension_id];

   // Initialize the extension storage, if it doesn't already exist.
   if (!storage)
     storage = std::make_unique<ExtensionStorage>(quota_bytes_per_extension_);

   return storage->Set(std::move(input_values), changes);
 }

 void SessionStorageManager::Remove(const ExtensionId& extension_id,
                                    const std::vector<std::string>& keys,
                                    std::vector<ValueChange>& changes) {
   auto storage_it = extensions_storage_.find(extension_id);
   if (storage_it != extensions_storage_.end())
     storage_it->second->Remove(keys, changes);
 }

 void SessionStorageManager::Remove(const ExtensionId& extension_id,
                                    const std::string& key,
                                    std::vector<ValueChange>& changes) {
   Remove(extension_id, std::vector<std::string>(1, key), changes);
 }

 void SessionStorageManager::Clear(const ExtensionId& extension_id,
                                   std::vector<ValueChange>& changes) {
   auto storage_it = extensions_storage_.find(extension_id);
   if (storage_it != extensions_storage_.end())
     storage_it->second->Clear(changes);
 }

 size_t SessionStorageManager::GetBytesInUse(const ExtensionId& extension_id,
                                             const std::string& key) const {
   return GetBytesInUse(extension_id, std::vector<std::string>(1, key));
 }

 size_t SessionStorageManager::GetBytesInUse(
     const ExtensionId& extension_id,
     const std::vector<std::string>& keys) const {
   auto storage_it = extensions_storage_.find(extension_id);
   if (storage_it != extensions_storage_.end())
     return storage_it->second->GetBytesInUse(keys);
   return 0;
 }

 size_t SessionStorageManager::GetTotalBytesInUse(
     const ExtensionId& extension_id) const {
   auto storage_it = extensions_storage_.find(extension_id);
   if (storage_it != extensions_storage_.end())
     return storage_it->second->GetTotalBytesInUse();
   return 0;
 }

 }  // namespace extensions
	// Copyright 2021 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "extensions/browser/api/storage/session_storage_manager.h"

	#include "base/trace_event/memory_usage_estimator.h"
	#include "extensions/common/api/storage.h"

	using base::trace_event::EstimateMemoryUsage;

	namespace extensions {

	// Implementation of SessionValue.
	SessionStorageManager::SessionValue::SessionValue(base::Value value,
	size_t size)
	: value(std::move(value)), size(size) {}

	// Implementation of ValueChange.
	SessionStorageManager::ValueChange::ValueChange(
	std::string key,
	base::Optional<base::Value> old_value,
	base::Value* new_value)
	: key(key), old_value(std::move(old_value)), new_value(new_value) {}

	SessionStorageManager::ValueChange::~ValueChange() = default;

	SessionStorageManager::ValueChange::ValueChange(ValueChange&& other) = default;

	// Implementation of ExtensionStorage.
	SessionStorageManager::ExtensionStorage::ExtensionStorage(size_t quota_bytes)
	: quota_bytes_(quota_bytes) {}

	SessionStorageManager::ExtensionStorage::~ExtensionStorage() = default;

	size_t SessionStorageManager::ExtensionStorage::CalculateUsage(
	std::map<std::string, base::Value> input_values,
	std::map<std::string, std::unique_ptr<SessionValue>>& session_values)
	const {
	size_t updated_used_total = used_total_;

	for (auto& input_it : input_values) {
	size_t input_size = EstimateMemoryUsage(input_it.first) +
	EstimateMemoryUsage(input_it.second);
	updated_used_total += input_size;

	// Remove session value size of existent key from total used bytes.
	auto existent_value_it = values_.find(input_it.first);
	if (existent_value_it != values_.end()) {
	// `updated_used_total` is guaranteed to be at least as large as any
	// individual value that's already in the map.
	DCHECK_GE(updated_used_total, existent_value_it->second->size);
	updated_used_total -= existent_value_it->second->size;
	}

	// Add input to the session values map.
	session_values.emplace(
	std::move(input_it.first),
	std::make_unique<SessionValue>(std::move(input_it.second), input_size));
	}

	if (updated_used_total >= quota_bytes_) {
	session_values.clear();
	return quota_bytes_;
	}

	return updated_used_total;
	}

	std::map<std::string, const base::Value*>
	SessionStorageManager::ExtensionStorage::Get(
	const std::vector<std::string>& keys) const {
	std::map<std::string, const base::Value*> values;
	for (auto& key : keys) {
	auto value_it = values_.find(key);
	if (value_it != values_.end())
	values.emplace(key, &value_it->second->value);
	}
	return values;
	}

	std::map<std::string, const base::Value*>
	SessionStorageManager::ExtensionStorage::GetAll() const {
	std::map<std::string, const base::Value*> values;
	for (auto& value : values_) {
	values.emplace(value.first, &value.second->value);
	}
	return values;
	}

	bool SessionStorageManager::ExtensionStorage::Set(
	std::map<std::string, base::Value> input_values,
	std::vector<ValueChange>& changes) {
	std::map<std::string, std::unique_ptr<SessionValue>> session_values;
	size_t updated_used_total =
	CalculateUsage(std::move(input_values), session_values);
	if (updated_used_total == quota_bytes_)
	return false;

	// Insert values in storage map and update total bytes.
	for (auto& session_value : session_values) {
	// Do nothing if key's existent value is the same as the new value.
	auto& existent_value = values_[session_value.first];
	if (existent_value && existent_value->value == session_value.second->value)
	continue;

	// Add the change to the changes list.
	ValueChange change(session_value.first,
	existent_value ? base::Optional<base::Value>(
	std::move(existent_value->value))
	: base::nullopt,
	&session_value.second->value);
	changes.push_back(std::move(change));

	existent_value = std::move(session_value.second);
	}
	used_total_ = updated_used_total;
	return true;
	}

	void SessionStorageManager::ExtensionStorage::Remove(
	const std::vector<std::string>& keys,
	std::vector<ValueChange>& changes) {
	for (auto& key : keys) {
	auto value_it = values_.find(key);
	if (value_it == values_.end())
	continue;

	// Add the change to the changes list.
	ValueChange change(
	key, base::Optional<base::Value>(std::move(value_it->second->value)),
	nullptr);
	changes.push_back(std::move(change));

	used_total_ -= value_it->second->size;
	values_.erase(value_it);
	}
	}

	void SessionStorageManager::ExtensionStorage::Clear(
	std::vector<ValueChange>& changes) {
	for (auto& value : values_) {
	ValueChange change(
	value.first,
	base::Optional<base::Value>(std::move(value.second->value)), nullptr);
	changes.push_back(std::move(change));
	}

	used_total_ = 0;
	values_.clear();
	}

	size_t SessionStorageManager::ExtensionStorage::GetBytesInUse(
	const std::vector<std::string>& keys) const {
	size_t total = 0;
	for (const auto& key : keys) {
	auto value_it = values_.find(key);
	if (value_it != values_.end())
	total += value_it->second->size;
	}
	return total;
	}

	size_t SessionStorageManager::ExtensionStorage::GetTotalBytesInUse() const {
	return used_total_;
	}

	// Implementation of SessionStorageManager.
	SessionStorageManager::SessionStorageManager(size_t quota_bytes_per_extension)
	: quota_bytes_per_extension_(quota_bytes_per_extension) {}

	SessionStorageManager::~SessionStorageManager() = default;

	const base::Value* SessionStorageManager::Get(const ExtensionId& extension_id,
	const std::string& key) const {
	std::map<std::string, const base::Value*> values =
	Get(extension_id, std::vector<std::string>(1, key));
	if (values.empty())
	return nullptr;

	// Only a single value should be returned.
	DCHECK_EQ(1u, values.size());
	return values.begin()->second;
	}

	std::map<std::string, const base::Value*> SessionStorageManager::Get(
	const ExtensionId& extension_id,
	const std::vector<std::string>& keys) const {
	auto storage_it = extensions_storage_.find(extension_id);
	if (storage_it == extensions_storage_.end()) {
	return std::map<std::string, const base::Value*>();
	}

	return storage_it->second->Get(keys);
	}

	std::map<std::string, const base::Value*> SessionStorageManager::GetAll(
	const ExtensionId& extension_id) const {
	auto storage_it = extensions_storage_.find(extension_id);
	if (storage_it == extensions_storage_.end()) {
	return std::map<std::string, const base::Value*>();
	}

	return storage_it->second->GetAll();
	}

	bool SessionStorageManager::Set(const ExtensionId& extension_id,
	std::map<std::string, base::Value> input_values,
	std::vector<ValueChange>& changes) {
	auto& storage = extensions_storage_[extension_id];

	// Initialize the extension storage, if it doesn't already exist.
	if (!storage)
	storage = std::make_unique<ExtensionStorage>(quota_bytes_per_extension_);

	return storage->Set(std::move(input_values), changes);
	}

	void SessionStorageManager::Remove(const ExtensionId& extension_id,
	const std::vector<std::string>& keys,
	std::vector<ValueChange>& changes) {
	auto storage_it = extensions_storage_.find(extension_id);
	if (storage_it != extensions_storage_.end())
	storage_it->second->Remove(keys, changes);
	}

	void SessionStorageManager::Remove(const ExtensionId& extension_id,
	const std::string& key,
	std::vector<ValueChange>& changes) {
	Remove(extension_id, std::vector<std::string>(1, key), changes);
	}

	void SessionStorageManager::Clear(const ExtensionId& extension_id,
	std::vector<ValueChange>& changes) {
	auto storage_it = extensions_storage_.find(extension_id);
	if (storage_it != extensions_storage_.end())
	storage_it->second->Clear(changes);
	}

	size_t SessionStorageManager::GetBytesInUse(const ExtensionId& extension_id,
	const std::string& key) const {
	return GetBytesInUse(extension_id, std::vector<std::string>(1, key));
	}

	size_t SessionStorageManager::GetBytesInUse(
	const ExtensionId& extension_id,
	const std::vector<std::string>& keys) const {
	auto storage_it = extensions_storage_.find(extension_id);
	if (storage_it != extensions_storage_.end())
	return storage_it->second->GetBytesInUse(keys);
	return 0;
	}

	size_t SessionStorageManager::GetTotalBytesInUse(
	const ExtensionId& extension_id) const {
	auto storage_it = extensions_storage_.find(extension_id);
	if (storage_it != extensions_storage_.end())
	return storage_it->second->GetTotalBytesInUse();
	return 0;
	}

	} // namespace extensions