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// Copyright 2014 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 <map>
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "chromeos/dbus/nfc_record_client.h"
#include "device/nfc/nfc_tag_technology.h"
namespace chromeos {
class NfcTagChromeOS;
// The NfcNdefTagTechnologyChromeOS class implements
// device::NfcNdefTagTechnology for the Chrome OS platform. The lifetime of an
// instance of this class must be tied to an instance of NfcTagChromeOS.
// Instances of this class must never outlast the owning NfcTagChromeOS
// instance.
class NfcNdefTagTechnologyChromeOS : public device::NfcNdefTagTechnology,
public NfcRecordClient::Observer {
virtual ~NfcNdefTagTechnologyChromeOS();
// device::NfcNdefTagTechnology overrides.
virtual void AddObserver(device::NfcNdefTagTechnology::Observer* observer)
virtual void RemoveObserver(device::NfcNdefTagTechnology::Observer* observer)
virtual const device::NfcNdefMessage& GetNdefMessage() const override;
virtual void WriteNdef(const device::NfcNdefMessage& message,
const base::Closure& callback,
const ErrorCallback& error_callback) override;
// NfcRecordClient::Observer overrides.
virtual void RecordAdded(const dbus::ObjectPath& object_path) override;
virtual void RecordRemoved(const dbus::ObjectPath& object_path) override;
virtual void RecordPropertiesReceived(
const dbus::ObjectPath& object_path) override;
friend class NfcTagChromeOS;
// Mapping from D-Bus object paths to NfcNdefRecord objects.
typedef std::map<dbus::ObjectPath, device::NfcNdefRecord*> NdefRecordMap;
explicit NfcNdefTagTechnologyChromeOS(NfcTagChromeOS* tag);
// Called by dbus:: on completion of the D-Bus method call to write an NDEF.
void OnWriteNdefMessage(const base::Closure& callback);
void OnWriteNdefMessageError(const ErrorCallback& error_callback,
const std::string& error_name,
const std::string& error_message);
// Creates a record object for the record with object path |object_path| and
// notifies the observers, if a record object did not already exist for it.
void AddRecord(const dbus::ObjectPath& object_path);
// A map containing the NDEF records that were received from the tag.
NdefRecordMap records_;
// Message instance that contains pointers to all created records that are
// in |records_|. This is mainly used as the cached return value for
// GetNdefMessage().
device::NfcNdefMessage message_;
// List of observers interested in event notifications from us.
ObserverList<device::NfcNdefTagTechnology::Observer> observers_;
// D-Bus object path of the remote tag or device that this object operates
// on.
dbus::ObjectPath object_path_;
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<NfcNdefTagTechnologyChromeOS> weak_ptr_factory_;
} // namespace chromeos