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// Copyright 2023 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/network/ephemeral_network_policies_enablement_handler.h"
#include <memory>
#include "ash/constants/ash_features.h"
#include "ash/constants/ash_pref_names.h"
#include "base/functional/callback.h"
#include "chromeos/ash/components/network/policy_util.h"
#include "components/prefs/pref_member.h"
namespace ash {
EphemeralNetworkPoliciesEnablementHandler::
EphemeralNetworkPoliciesEnablementHandler(
base::OnceClosure on_ephemeral_network_policies_enabled)
: on_ephemeral_network_policies_enabled_(
std::move(on_ephemeral_network_policies_enabled)) {
DCHECK(on_ephemeral_network_policies_enabled_);
if (features::AreEphemeralNetworkPoliciesEnabled()) {
// Ephemeral network policies are enabled unconditionally.
EnableEphemeralNetworkPolicies();
}
}
EphemeralNetworkPoliciesEnablementHandler::
~EphemeralNetworkPoliciesEnablementHandler() = default;
void EphemeralNetworkPoliciesEnablementHandler::SetDevicePrefs(
PrefService* device_prefs) {
if (!device_prefs) {
ephemeral_network_policies_enabled_pref_.reset();
return;
}
if (policy_util::AreEphemeralNetworkPoliciesEnabled()) {
// Already enabled - don't care about the policy value.
return;
}
ephemeral_network_policies_enabled_pref_ =
std::make_unique<BooleanPrefMember>();
ephemeral_network_policies_enabled_pref_->Init(
prefs::kDeviceEphemeralNetworkPoliciesEnabled, device_prefs,
base::BindRepeating(
&EphemeralNetworkPoliciesEnablementHandler::EvaluatePolicyValue,
base::Unretained(this)));
// Also evaluate the initial state of enablement.
EvaluatePolicyValue();
}
void EphemeralNetworkPoliciesEnablementHandler::EvaluatePolicyValue() {
// Don't do anything if ephemeral network policies are already enabled - can
// only be disabled again by restarting ash-chrome.
if (policy_util::AreEphemeralNetworkPoliciesEnabled()) {
return;
}
if (ephemeral_network_policies_enabled_pref_ &&
ephemeral_network_policies_enabled_pref_->GetValue()) {
EnableEphemeralNetworkPolicies();
}
}
void EphemeralNetworkPoliciesEnablementHandler::
EnableEphemeralNetworkPolicies() {
// Ephemeral network policies became enabled - mark as such and notify the
// observer. This can only happen once per process lifetime (see the guard
// clauses above).
policy_util::SetEphemeralNetworkPoliciesEnabled();
DCHECK(on_ephemeral_network_policies_enabled_);
std::move(on_ephemeral_network_policies_enabled_).Run();
// There's no need to watch the policy enablement anymore after ephemeral
// network policies have been enabled.
ephemeral_network_policies_enabled_pref_.reset();
}
} // namespace ash
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