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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/collaboration/internal/messaging/data_sharing_change_notifier_impl.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/observer_list.h"
#include "base/task/single_thread_task_runner.h"
#include "components/collaboration/internal/messaging/data_sharing_change_notifier.h"
#include "components/data_sharing/public/data_sharing_service.h"
namespace collaboration::messaging {
DataSharingChangeNotifierImpl::DataSharingChangeNotifierImpl(
data_sharing::DataSharingService* data_sharing_service)
: data_sharing_service_(data_sharing_service) {}
DataSharingChangeNotifierImpl::~DataSharingChangeNotifierImpl() = default;
void DataSharingChangeNotifierImpl::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
if (is_initialized_) {
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(&DataSharingChangeNotifierImpl::
NotifyDataSharingChangeNotifierInitialized,
weak_ptr_factory_.GetWeakPtr()));
}
}
void DataSharingChangeNotifierImpl::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
DataSharingChangeNotifier::FlushCallback
DataSharingChangeNotifierImpl::Initialize() {
if (data_sharing_service_->IsGroupDataModelLoaded()) {
is_initialized_ = true;
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(&DataSharingChangeNotifierImpl::
NotifyDataSharingChangeNotifierInitialized,
weak_ptr_factory_.GetWeakPtr()));
}
// Regardless of whether the service was already initialized or not, we now
// need to start observing it to get all future events. If it was not
// already initialized, we also need OnGroupDataModelLoaded() call.
data_sharing_service_observer_.Observe(data_sharing_service_);
return base::BindOnce(
&DataSharingChangeNotifierImpl::FlushGroupEventsSinceStartup,
weak_ptr_factory_.GetWeakPtr());
}
void DataSharingChangeNotifierImpl::OnGroupDataModelLoaded() {
if (is_initialized_) {
// The DataSharingService was ready at startup, so we do not need to do
// anything now.
return;
}
is_initialized_ = true;
// This is the first time we know about initialization, so inform our
// observers. Since we are reacting to a callback, we do not need to post
// this.
NotifyDataSharingChangeNotifierInitialized();
}
bool DataSharingChangeNotifierImpl::IsInitialized() {
return is_initialized_;
}
void DataSharingChangeNotifierImpl::OnGroupAdded(
const data_sharing::GroupData& group_data,
const base::Time& event_time) {
if (!has_flushed_ || sync_bridge_update_type_ !=
data_sharing::SyncBridgeUpdateType::kDefaultState) {
return;
}
OnGroupAddedInternal(group_data.group_token.group_id, group_data, event_time);
}
void DataSharingChangeNotifierImpl::OnGroupRemoved(
const data_sharing::GroupId& group_id,
const base::Time& event_time) {
if (!has_flushed_ || sync_bridge_update_type_ !=
data_sharing::SyncBridgeUpdateType::kDefaultState) {
return;
}
OnGroupRemovedInternal(group_id, event_time);
}
void DataSharingChangeNotifierImpl::OnGroupMemberAdded(
const data_sharing::GroupId& group_id,
const GaiaId& member_gaia_id,
const base::Time& event_time) {
if (!has_flushed_ || sync_bridge_update_type_ !=
data_sharing::SyncBridgeUpdateType::kDefaultState) {
return;
}
std::optional<data_sharing::GroupData> group_data =
GetGroupDataIfAvailable(group_id);
if (!group_data) {
// This can happen during startup while we are processing multiple events
// in-order where a group can have first added a member and later have been
// deleted. In those cases, observers will be informed of the group removal
// when we get to that event.
return;
}
for (Observer& observer : observers_) {
observer.OnGroupMemberAdded(*group_data, member_gaia_id, event_time);
}
}
void DataSharingChangeNotifierImpl::OnGroupMemberRemoved(
const data_sharing::GroupId& group_id,
const GaiaId& member_gaia_id,
const base::Time& event_time) {
if (!has_flushed_ || sync_bridge_update_type_ !=
data_sharing::SyncBridgeUpdateType::kDefaultState) {
return;
}
std::optional<data_sharing::GroupData> group_data =
GetGroupDataIfAvailable(group_id);
if (!group_data) {
// This can happen during startup while we are processing multiple events
// in-order where a group can have first lost a member and later have been
// deleted. In those cases, observers will be informed of the group removal
// when we get to that event.
return;
}
for (Observer& observer : observers_) {
observer.OnGroupMemberRemoved(*group_data, member_gaia_id, event_time);
}
}
void DataSharingChangeNotifierImpl::OnSyncBridgeUpdateTypeChanged(
data_sharing::SyncBridgeUpdateType sync_bridge_update_type) {
sync_bridge_update_type_ = sync_bridge_update_type;
}
void DataSharingChangeNotifierImpl::NotifyDataSharingChangeNotifierInitialized()
const {
for (auto& observer : observers_) {
observer.OnDataSharingChangeNotifierInitialized();
}
}
std::optional<data_sharing::GroupData>
DataSharingChangeNotifierImpl::GetGroupDataIfAvailable(
const data_sharing::GroupId& group_id) {
std::optional<data_sharing::GroupData> group_data =
data_sharing_service_->ReadGroup(group_id);
if (group_data) {
return group_data;
}
return data_sharing_service_->GetPossiblyRemovedGroup(group_id);
}
void DataSharingChangeNotifierImpl::OnGroupAddedInternal(
const data_sharing::GroupId& group_id,
const std::optional<data_sharing::GroupData>& group_data,
const base::Time& event_time) {
std::optional<data_sharing::GroupData> group_data_for_publish = group_data;
if (!group_data_for_publish) {
group_data_for_publish = GetGroupDataIfAvailable(group_id);
}
for (Observer& observer : observers_) {
observer.OnGroupAdded(group_id, group_data_for_publish, event_time);
}
}
void DataSharingChangeNotifierImpl::OnGroupRemovedInternal(
const data_sharing::GroupId& group_id,
const base::Time& event_time) {
std::optional<data_sharing::GroupData> group_data_for_publish =
GetGroupDataIfAvailable(group_id);
for (Observer& observer : observers_) {
observer.OnGroupRemoved(group_id, group_data_for_publish, event_time);
}
}
void DataSharingChangeNotifierImpl::FlushGroupEventsSinceStartup() {
CHECK(is_initialized_);
has_flushed_ = true;
for (const data_sharing::GroupEvent& event :
data_sharing_service_->GetGroupEventsSinceStartup()) {
switch (event.event_type) {
case data_sharing::GroupEvent::EventType::kGroupAdded:
OnGroupAddedInternal(event.group_id, std::nullopt, event.event_time);
break;
case data_sharing::GroupEvent::EventType::kGroupRemoved:
OnGroupRemovedInternal(event.group_id, event.event_time);
break;
case data_sharing::GroupEvent::EventType::kMemberAdded:
// Membership changes should always have an affected GAIA ID.
CHECK(event.affected_member_gaia_id);
OnGroupMemberAdded(event.group_id, *event.affected_member_gaia_id,
event.event_time);
break;
case data_sharing::GroupEvent::EventType::kMemberRemoved:
// Membership changes should always have an affected GAIA ID.
CHECK(event.affected_member_gaia_id);
OnGroupMemberRemoved(event.group_id, *event.affected_member_gaia_id,
event.event_time);
break;
}
}
}
} // namespace collaboration::messaging
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