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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_BUCKETS_BUCKET_MANAGER_HOST_H_
#define CONTENT_BROWSER_BUCKETS_BUCKET_MANAGER_HOST_H_
#include <map>
#include <set>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "components/services/storage/public/cpp/quota_error_or.h"
#include "content/browser/buckets/bucket_context.h"
#include "content/browser/buckets/bucket_host.h"
#include "mojo/public/cpp/bindings/message.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "third_party/blink/public/mojom/buckets/bucket_manager_host.mojom.h"
#include "third_party/blink/public/mojom/quota/quota_types.mojom-shared.h"
namespace storage {
struct BucketInfo;
class QuotaManagerProxy;
} // namespace storage
namespace content {
class BucketManager;
class StoragePartitionImpl;
// Implements the Storage Buckets API for a single StorageKey.
//
// BucketManager owns all BucketManagerHost instances associated with
// a StorageParititon. A new instance is created for every `StorageKey`.
// Instances are destroyed when all their corresponding mojo connection are
// closed, or when BucketManager is destroyed.
class BucketManagerHost : public blink::mojom::BucketManagerHost {
public:
explicit BucketManagerHost(BucketManager* manager,
const blink::StorageKey& storage_key);
~BucketManagerHost() override;
BucketManagerHost(const BucketManagerHost&) = delete;
BucketManagerHost& operator=(const BucketManagerHost&) = delete;
// Binds |receiver| to the BucketManagerHost. The |receiver| must belong to
// the frame or worker from this host's `StorageKey`. `context` is used to
// determine permissions for the receiver.
void BindReceiver(
mojo::PendingReceiver<blink::mojom::BucketManagerHost> receiver,
base::WeakPtr<BucketContext> context);
// The `StorageKey` served by this host.
const blink::StorageKey& storage_key() const { return storage_key_; }
// Returns true if there are no receivers connected to this host.
//
// The BucketManager that owns this host is expected to destroy the host when
// it is not serving any receivers.
bool has_connected_receivers() const { return !receivers_.empty(); }
// blink::mojom::BucketsManagerHost:
void OpenBucket(const std::string& name,
blink::mojom::BucketPoliciesPtr policy,
OpenBucketCallback callback) override;
// Gets the bucket with the given name. Doesn't create the bucket if it
// doesn't exist.
void GetBucketForDevtools(
const std::string& name,
mojo::PendingReceiver<blink::mojom::BucketHost> receiver) override;
void Keys(KeysCallback callback) override;
void DeleteBucket(const std::string& name,
DeleteBucketCallback callback) override;
void RemoveBucketHost(storage::BucketId id);
StoragePartitionImpl* GetStoragePartition();
storage::QuotaManagerProxy* GetQuotaManagerProxy();
private:
// Called when a receiver in the receiver set is disconnected.
void OnReceiverDisconnect();
void DidGetBucket(base::WeakPtr<BucketContext> bucket_context,
OpenBucketCallback callback,
storage::QuotaErrorOr<storage::BucketInfo> result);
void DidGetBuckets(
KeysCallback callback,
storage::QuotaErrorOr<std::set<storage::BucketInfo>> result);
void DidDeleteBucket(const std::string& bucket_name,
DeleteBucketCallback callback,
blink::mojom::QuotaStatusCode status);
void DidGetBucketForDevtools(
base::WeakPtr<BucketContext> bucket_context,
mojo::PendingReceiver<blink::mojom::BucketHost> receiver,
storage::QuotaErrorOr<storage::BucketInfo> result);
SEQUENCE_CHECKER(sequence_checker_);
// Raw pointer is safe because BucketManager owns this BucketManagerHost, and
// is therefore guaranteed to outlive it.
const raw_ptr<BucketManager> manager_;
// The `StorageKey` of the frame or worker connected to this
// BucketManagerHost.
const blink::StorageKey storage_key_;
// Map of currently open/used buckets. The lifetime matches that of the remote
// which means they can outlive the bucket's data.
std::map<storage::BucketId, std::unique_ptr<BucketHost>> bucket_map_;
// Add receivers for frames & workers for `storage_key_` associated with
// the StoragePartition that owns `manager_`.
mojo::ReceiverSet<blink::mojom::BucketManagerHost,
base::WeakPtr<BucketContext>>
receivers_;
base::WeakPtrFactory<BucketManagerHost> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_BUCKETS_BUCKET_MANAGER_HOST_H_
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