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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/initial_external_extension_loader.h"
#include <string>
#include "base/strings/strcat.h"
#include "base/types/to_address.h"
#include "base/values.h"
#include "chrome/browser/extensions/external_provider_impl.h"
#include "components/crx_file/id_util.h"
#include "components/prefs/pref_service.h"
#include "content/public/browser/browser_thread.h"
#include "extensions/browser/pref_names.h"
#include "extensions/common/extension_urls.h"
namespace extensions {
namespace {
std::string MakePrefName(const std::string& extension_id,
const std::string& pref_name) {
return base::StrCat({extension_id, ".", pref_name});
}
// Generates a dictionary of preferences for the given extension IDs.
// For each valid extension ID in `extensions_ids`, its creates
// preferences to set the update URL to the Chrome Web Store and to mark the
// extension as trusted (i.e., not untrusted).
base::Value::Dict GenerateExtensionPrefs(
const base::Value::List& extensions_ids) {
base::Value::Dict prefs;
const std::string web_store_update_url =
extension_urls::GetWebstoreUpdateUrl().spec();
for (const auto& extension_id : extensions_ids) {
const std::string* id = extension_id.GetIfString();
if (!id || !crx_file::id_util::IdIsValid(*id)) {
continue;
}
prefs.SetByDottedPath(
MakePrefName(*id, ExternalProviderImpl::kExternalUpdateUrl),
web_store_update_url);
prefs.SetByDottedPath(
MakePrefName(*id, ExternalProviderImpl::kMayBeUntrusted), false);
}
return prefs;
}
} // namespace
InitialExternalExtensionLoader::InitialExternalExtensionLoader(
PrefService& prefs)
: prefs_(prefs) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
pref_registrar_.Init(base::to_address(prefs_));
// base::Unretained() is safe because `pref_registrar_` is owned by `this`.
//
// `pref_names::kInitialInstallList` may not be populated at this time.
// Therefore, future changes should be monitored so that the extension ids
// will be taken into consideration.
pref_registrar_.Add(
pref_names::kInitialInstallList,
base::BindRepeating(
&InitialExternalExtensionLoader::OnExtensionsPrefChanged,
base::Unretained(this)));
}
InitialExternalExtensionLoader::~InitialExternalExtensionLoader() = default;
void InitialExternalExtensionLoader::StartLoading() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
const base::Value::List& ids =
prefs_->GetList(pref_names::kInitialInstallList);
LoadFinished(GenerateExtensionPrefs(ids));
}
void InitialExternalExtensionLoader::OnExtensionsPrefChanged() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
const base::Value::List& ids =
prefs_->GetList(pref_names::kInitialInstallList);
OnUpdated(GenerateExtensionPrefs(ids));
}
} // namespace extensions
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