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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/mojo_service_manager/fake_mojo_service_manager.h"
#include <utility>
#include "base/check.h"
#include "chromeos/ash/components/mojo_service_manager/connection.h"
namespace ash::mojo_service_manager {
// The security context of ash-chrome. This should be the default security
// context for the global connection.
constexpr char kAshSecurityContext[] = "u:r:cros_browser:s0";
namespace mojom = ::chromeos::mojo_service_manager::mojom;
FakeMojoServiceManager::ServiceState::ServiceState() = default;
FakeMojoServiceManager::ServiceState::~ServiceState() = default;
FakeMojoServiceManager::FakeMojoServiceManager() {
SetServiceManagerRemoteForTesting(
AddNewPipeAndPassRemote(kAshSecurityContext));
}
FakeMojoServiceManager::~FakeMojoServiceManager() {
// Reset the connection before the fake service manager so the disconnect
// handler won't be triggered.
ResetServiceManagerConnection();
}
mojo::PendingRemote<mojom::ServiceManager>
FakeMojoServiceManager::AddNewPipeAndPassRemote(
const std::string& security_context) {
mojo::PendingRemote<mojom::ServiceManager> remote;
receiver_set_.Add(this, remote.InitWithNewPipeAndPassReceiver(),
mojom::ProcessIdentity::New(security_context, 0, 0, 0));
return remote;
}
void FakeMojoServiceManager::Register(
const std::string& service_name,
mojo::PendingRemote<mojom::ServiceProvider> service_provider) {
auto it = service_map_.find(service_name);
if (it == service_map_.end()) {
auto [it_new, success] = service_map_.try_emplace(service_name);
CHECK(success);
it = it_new;
}
ServiceState& service_state = it->second;
if (service_state.service_provider.is_bound()) {
service_provider.ResetWithReason(
static_cast<uint32_t>(mojom::ErrorCode::kServiceAlreadyRegistered),
"The service: " + service_name + " has already been registered.");
return;
}
service_state.service_provider.Bind(std::move(service_provider));
service_state.service_provider.set_disconnect_handler(
base::BindOnce(&FakeMojoServiceManager::ServiceProviderDisconnectHandler,
base::Unretained(this), service_name));
const mojom::ProcessIdentityPtr& identity = receiver_set_.current_context();
service_state.owner = identity.Clone();
SendServiceEvent(mojom::ServiceEvent::New(
mojom::ServiceEvent::Type::kRegistered, service_name, identity.Clone()));
auto pending_requests = std::move(service_state.pending_requests);
for (auto& [requester, receiver] : pending_requests) {
// If a receiver become invalid before being posted, don't send it because
// the mojo will complain about sending invalid handles and reset the
// connection of service provider.
if (!receiver.is_valid()) {
continue;
}
service_state.service_provider->Request(std::move(requester),
std::move(receiver));
}
}
void FakeMojoServiceManager::Request(const std::string& service_name,
std::optional<base::TimeDelta> /*timeout*/,
mojo::ScopedMessagePipeHandle receiver) {
auto it = service_map_.find(service_name);
if (it == service_map_.end()) {
auto [it_new, success] = service_map_.try_emplace(service_name);
CHECK(success);
it = it_new;
}
ServiceState& service_state = it->second;
const mojom::ProcessIdentityPtr& identity = receiver_set_.current_context();
if (service_state.service_provider.is_bound()) {
service_state.service_provider->Request(identity.Clone(),
std::move(receiver));
return;
}
service_state.pending_requests.emplace_back(identity.Clone(),
std::move(receiver));
}
void FakeMojoServiceManager::Query(const std::string& service_name,
QueryCallback callback) {
auto it = service_map_.find(service_name);
if (it == service_map_.end()) {
std::move(callback).Run(mojom::ErrorOrServiceState::NewError(
mojom::Error::New(mojom::ErrorCode::kServiceNotFound,
"Cannot find service: " + service_name)));
return;
}
const ServiceState& service_state = it->second;
mojom::ServiceStatePtr state =
service_state.service_provider.is_bound()
? mojom::ServiceState::NewRegisteredState(
mojom::RegisteredServiceState::New(
/*owner=*/service_state.owner.Clone()))
: mojom::ServiceState::NewUnregisteredState(
mojom::UnregisteredServiceState::New());
std::move(callback).Run(
mojom::ErrorOrServiceState::NewState(std::move(state)));
}
void FakeMojoServiceManager::AddServiceObserver(
mojo::PendingRemote<mojom::ServiceObserver> observer) {
service_observers_.Add(std::move(observer));
}
void FakeMojoServiceManager::ServiceProviderDisconnectHandler(
const std::string& service_name) {
auto it = service_map_.find(service_name);
CHECK(it != service_map_.end());
ServiceState& service_state = it->second;
service_state.service_provider.reset();
mojom::ProcessIdentityPtr dispatcher;
dispatcher.Swap(&service_state.owner);
SendServiceEvent(
mojom::ServiceEvent::New(mojom::ServiceEvent::Type::kUnRegistered,
service_name, std::move(dispatcher)));
}
void FakeMojoServiceManager::SendServiceEvent(mojom::ServiceEventPtr event) {
for (const mojo::Remote<mojom::ServiceObserver>& remote :
service_observers_) {
remote->OnServiceEvent(event.Clone());
}
}
} // namespace ash::mojo_service_manager
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