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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/api/i18n/i18n_api.h"
#include <algorithm>
#include <string>
#include <vector>
#include "base/lazy_instance.h"
#include "base/prefs/pref_service.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/extensions/api/i18n.h"
#include "chrome/common/pref_names.h"
namespace GetAcceptLanguages = extensions::api::i18n::GetAcceptLanguages;
namespace extensions {
namespace {
// Errors.
static const char kEmptyAcceptLanguagesError[] = "accept-languages is empty.";
}
bool I18nGetAcceptLanguagesFunction::RunImpl() {
std::string accept_languages =
GetProfile()->GetPrefs()->GetString(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 guranteed to be valid, and the accept-languages string returned from
// profile()->GetPrefs()->GetString(prefs::kAcceptLanguages) is guranteed to
// be valid and well-formed, which means each accept-langauge is a valid
// code, and accept-languages are seperatd 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()) {
error_ = kEmptyAcceptLanguagesError;
return false;
}
std::vector<std::string> languages;
base::SplitString(accept_languages, ',', &languages);
languages.erase(std::remove(languages.begin(), languages.end(), ""),
languages.end());
if (languages.empty()) {
error_ = kEmptyAcceptLanguagesError;
return false;
}
results_ = GetAcceptLanguages::Results::Create(languages);
return true;
}
} // namespace extensions
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