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// Copyright 2012 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/browser/api/i18n/i18n_api.h"
#include <algorithm>
#include <string>
#include <vector>
#include "base/strings/string_split.h"
#include "components/language/core/browser/pref_names.h"
#include "components/prefs/pref_service.h"
#include "extensions/browser/extensions_browser_client.h"
#include "extensions/common/api/i18n.h"
namespace GetAcceptLanguages = extensions::api::i18n::GetAcceptLanguages;
namespace extensions {
namespace {
// Errors.
static const char kEmptyAcceptLanguagesError[] = "accept-languages is empty.";
} // namespace
ExtensionFunction::ResponseAction I18nGetAcceptLanguagesFunction::Run() {
PrefService* pref_service =
ExtensionsBrowserClient::Get()->GetPrefServiceForContext(
browser_context());
std::string accept_languages =
pref_service->GetString(language::prefs::kAcceptLanguages);
// Currently, there are 2 ways to set browser's accept-languages: through UI
// or directly modify the preference file. The accept-languages set through
// UI is guaranteed to be valid, and the accept-languages string returned from
// pref_service->GetString(language::prefs::kAcceptLanguages) is guaranteed
// to be valid and well-formed, which means each accept-language is a valid
// code, and accept-languages are separated by "," without surrrounding
// spaces. But we do not do any validation (either the format or the validity
// of the language code) on accept-languages set through editing preference
// file directly. So, here, we're adding extra checks to be resistant to
// crashes caused by data corruption.
if (accept_languages.empty())
return RespondNow(Error(kEmptyAcceptLanguagesError));
std::vector<std::string> languages = base::SplitString(
accept_languages, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
std::erase(languages, "");
if (languages.empty())
return RespondNow(Error(kEmptyAcceptLanguagesError));
return RespondNow(
ArgumentList(GetAcceptLanguages::Results::Create(languages)));
}
} // namespace extensions
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