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// Copyright 2015 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 <memory>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
namespace gcm {
class GCMDriver;
} // namespace gcm
namespace instance_id {
extern const char kGCMScope[];
// Encapsulates Instance ID functionalities that need to be implemented for
// different platforms. One instance is created per application. Life of
// Instance ID is managed by the InstanceIDDriver.
class InstanceID {
// Used in UMA. Can add enum values, but never renumber or delete and reuse.
enum Result {
// Successful operation.
// Invalid parameter.
// Instance ID is disabled.
// Previous asynchronous operation is still pending to finish.
// Network socket error.
// Problem at the server.
// 6 is omitted, in case we ever merge this enum with GCMClient::Result.
// Other errors.
// Used for UMA. Keep LAST_RESULT up to date and sync with histograms.xml.
// Asynchronous callbacks. Must not synchronously delete |this| (using
// InstanceIDDriver::RemoveInstanceID).
typedef base::Callback<void(const std::string& app_id,
bool update_id)> TokenRefreshCallback;
typedef base::Callback<void(const std::string& id)> GetIDCallback;
typedef base::Callback<void(const base::Time& creation_time)>
typedef base::Callback<void(const std::string& token,
Result result)> GetTokenCallback;
typedef base::Callback<void(const std::string&, const std::string&)>
typedef base::Callback<void(Result result)> DeleteTokenCallback;
typedef base::Callback<void(Result result)> DeleteIDCallback;
static const int kInstanceIDByteLength = 8;
// Creator. Should only be used by InstanceIDDriver::GetInstanceID.
// |app_id|: identifies the application that uses the Instance ID.
// |handler|: provides the GCM functionality needed to support Instance ID.
// Must outlive this class. On Android, this can be null instead.
static std::unique_ptr<InstanceID> CreateInternal(const std::string& app_id,
gcm::GCMDriver* gcm_driver);
virtual ~InstanceID();
// Sets the callback that will be invoked when the token refresh event needs
// to be triggered.
void SetTokenRefreshCallback(const TokenRefreshCallback& callback);
// Returns the Instance ID.
virtual void GetID(const GetIDCallback& callback) = 0;
// Returns the time when the InstanceID has been generated.
virtual void GetCreationTime(const GetCreationTimeCallback& callback) = 0;
// Retrieves a token that allows the authorized entity to access the service
// defined as "scope".
// |authorized_entity|: identifies the entity that is authorized to access
// resources associated with this Instance ID. It can be
// another Instance ID or a project ID.
// |scope|: identifies authorized actions that the authorized entity can take.
// E.g. for sending GCM messages, "GCM" scope should be used.
// |options|: allows including a small number of string key/value pairs that
// will be associated with the token and may be used in processing
// the request.
// |callback|: to be called once the asynchronous operation is done.
virtual void GetToken(const std::string& authorized_entity,
const std::string& scope,
const std::map<std::string, std::string>& options,
const GetTokenCallback& callback) = 0;
// Get the public encryption key and authentication secret associated with a
// GCM-scoped token. If encryption info is not yet associated, it will be
// created.
// |authorized_entity|: the authorized entity passed when obtaining the token.
// |callback|: to be called once the asynchronous operation is done.
void GetEncryptionInfo(const std::string& authorized_entity,
const GetEncryptionInfoCallback& callback);
// Revokes a granted token.
// |authorized_entity|: the authorized entity passed when obtaining the token.
// |scope|: the scope that was passed when obtaining the token.
// |callback|: to be called once the asynchronous operation is done.
void DeleteToken(const std::string& authorized_entity,
const std::string& scope,
const DeleteTokenCallback& callback);
// Resets the app instance identifier and revokes all tokens associated with
// it.
// |callback|: to be called once the asynchronous operation is done.
void DeleteID(const DeleteIDCallback& callback);
std::string app_id() const { return app_id_; }
InstanceID(const std::string& app_id, gcm::GCMDriver* gcm_driver);
// Platform-specific implementations.
virtual void DeleteTokenImpl(const std::string& authorized_entity,
const std::string& scope,
const DeleteTokenCallback& callback) = 0;
virtual void DeleteIDImpl(const DeleteIDCallback& callback) = 0;
void NotifyTokenRefresh(bool update_id);
gcm::GCMDriver* gcm_driver() { return gcm_driver_; }
void DidDelete(const std::string& authorized_entity,
const base::Callback<void(Result result)>& callback,
Result result);
// Owned by GCMProfileServiceFactory, which is a dependency of
// InstanceIDProfileServiceFactory, which owns this.
gcm::GCMDriver* gcm_driver_;
std::string app_id_;
TokenRefreshCallback token_refresh_callback_;
base::WeakPtrFactory<InstanceID> weak_ptr_factory_;
} // namespace instance_id