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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/common/features/feature_flags.h"
#include <algorithm>
#include "base/auto_reset.h"
#include "base/check.h"
#include "base/compiler_specific.h"
#include "base/feature_list.h"
#include "extensions/common/extension_features.h"
#include "third_party/blink/public/common/features_generated.h"
namespace extensions {
namespace {
// Feature flags for extension features. These can be used to implement remote
// kill switches for extension features. Note any such feature flags must
// generally be removed once the API has been stable for a few releases.
const base::Feature* kFeatureFlags[] = {
&extensions_features::kApiActionOpenPopup,
&extensions_features::kApiContentSettingsClipboard,
&extensions_features::kApiEnterpriseKioskInput,
&extensions_features::kApiPermissionsHostAccessRequests,
&extensions_features::kApiUserScriptsExecute,
&extensions_features::kApiUserScriptsMultipleWorlds,
&extensions_features::kApiOdfsConfigPrivate,
&extensions_features::kExperimentalOmniboxLabs,
&extensions_features::kExtensionIconVariants,
&extensions_features::kTelemetryExtensionPendingApprovalApi,
&extensions_features::
kApiEnterpriseReportingPrivateOnDataMaskingRulesTriggered,
&extensions_features::kWebstoreInstallerUserGestureKillSwitch,
#if BUILDFLAG(IS_CHROMEOS)
&blink::features::kSmartCard,
#endif
};
constinit base::span<const base::Feature*> g_feature_flags_test_override;
const base::Feature* GetFeature(const std::string& feature_flag) {
if (!g_feature_flags_test_override.empty()) [[unlikely]] {
auto iter = std::ranges::find(g_feature_flags_test_override, feature_flag,
&base::Feature::name);
return iter == g_feature_flags_test_override.end() ? nullptr : *iter;
}
const base::Feature** feature =
std::ranges::find(kFeatureFlags, feature_flag, &base::Feature::name);
return feature == std::end(kFeatureFlags) ? nullptr : *feature;
}
} // namespace
bool IsFeatureFlagEnabled(const std::string& feature_flag) {
const base::Feature* feature = GetFeature(feature_flag);
CHECK(feature) << feature_flag;
return base::FeatureList::IsEnabled(*feature);
}
ScopedFeatureFlagsOverride CreateScopedFeatureFlagsOverrideForTesting(
base::span<const base::Feature*> features) {
return base::AutoReset<base::span<const base::Feature*>>(
&g_feature_flags_test_override, features);
}
} // namespace extensions
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