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// Copyright 2024 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/ui/lens/lens_overlay_languages_controller.h"
#include <memory>
#include <utility>
#include <vector>
#include "base/values.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/lens/core/mojom/translate.mojom-forward.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/lens/lens_overlay_url_builder.h"
#include "chrome/common/channel_info.h"
#include "google_apis/common/api_key_request_util.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "services/data_decoder/public/cpp/data_decoder.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "ui/base/l10n/l10n_util.h"
namespace lens {
namespace {
constexpr int kMaxDownloadBytes = 1024 * 1024;
constexpr net::NetworkTrafficAnnotationTag kTrafficAnnotationTag =
net::DefineNetworkTrafficAnnotation("lens_overlay_languages", R"(
semantics {
sender: "Lens"
description: "A request to the translate GetSupportedLanguages "
"endpoint for the Lens Overlay feature in Chrome."
trigger: "The user triggered a Lens Overlay Flow by entering "
"the experience via an entrypoint such as the Lens icon in the "
"toolbar or Lens context menu item. This annotation corresponds "
"to the translate GetSupportedLanguages requests sent by the Lens "
"overlay to get language names and codes to show in the language "
"pickers of the full page translate feature. This response is "
"cached in the WebUI local storage and as such the request will "
"only be made when certain conditions are met to invalidate the "
"cache. This can include when the browser locale was changed or "
"data is stale by more than a defined time period (e.g. a month)."
data: "Only the browser process's locale separated into a language "
"code and country code are used in the request. These are used to "
"get supported languages with display names appropriate to the "
"user's locale."
destination: GOOGLE_OWNED_SERVICE
internal {
contacts {
email: "juanmojica@google.com"
}
contacts {
email: "lens-chrome@google.com"
}
}
user_data {
type: NONE
}
last_reviewed: "2024-10-24"
}
policy {
cookies_allowed: NO
cookies_store: ""
setting: "This feature is only shown in menus by default and does "
"nothing without explicit user action."
chrome_policy {
LensOverlaySettings {
LensOverlaySettings: 1
}
}
}
)");
} // namespace
LensOverlayLanguagesController::LensOverlayLanguagesController(Profile* profile)
: profile_(profile) {}
LensOverlayLanguagesController::~LensOverlayLanguagesController() = default;
void LensOverlayLanguagesController::SendGetSupportedLanguagesRequest(
SupportedLanguagesRetrievedCallback callback) {
callback_ = std::move(callback);
url_loader_ = InitializeURLLoader();
url_loader_->DownloadToString(
profile_->GetURLLoaderFactory().get(),
base::BindOnce(
&LensOverlayLanguagesController::OnGetSupportedLanguagesResponse,
weak_ptr_factory_.GetWeakPtr()),
kMaxDownloadBytes);
}
void LensOverlayLanguagesController::OnGetSupportedLanguagesResponse(
std::optional<std::string> response_body) {
if (!response_body) {
std::move(callback_).Run(locale_, std::vector<mojom::LanguagePtr>(),
std::vector<mojom::LanguagePtr>());
return;
}
data_decoder::DataDecoder::ParseJsonIsolated(
response_body.value(),
base::BindOnce(&LensOverlayLanguagesController::OnJsonParsed,
weak_ptr_factory_.GetWeakPtr()));
}
void LensOverlayLanguagesController::OnJsonParsed(
data_decoder::DataDecoder::ValueOrError result) {
if (!result.has_value()) {
std::move(callback_).Run(locale_, std::vector<mojom::LanguagePtr>(),
std::vector<mojom::LanguagePtr>());
return;
}
if (!result->is_dict()) {
std::move(callback_).Run(locale_, std::vector<mojom::LanguagePtr>(),
std::vector<mojom::LanguagePtr>());
return;
}
const base::Value::Dict& result_dict = result->GetDict();
const base::Value::List* source_language_list =
result_dict.FindList("sourceLanguages");
const base::Value::List* target_language_list =
result_dict.FindList("targetLanguages");
std::vector<lens::mojom::LanguagePtr> source_languages =
RetrieveLanguagesFromResults(source_language_list);
std::vector<lens::mojom::LanguagePtr> target_languages =
RetrieveLanguagesFromResults(target_language_list);
if (callback_) {
std::move(callback_).Run(locale_, std::move(source_languages),
std::move(target_languages));
}
}
std::vector<lens::mojom::LanguagePtr>
LensOverlayLanguagesController::RetrieveLanguagesFromResults(
const base::Value::List* result_list) {
if (!result_list) {
return std::vector<lens::mojom::LanguagePtr>();
}
std::vector<lens::mojom::LanguagePtr> languages_list;
for (const base::Value& result_language : *result_list) {
if (!result_language.is_dict()) {
continue;
}
const base::Value::Dict& result_language_dict = result_language.GetDict();
const std::string* language_code =
result_language_dict.FindString("language");
const std::string* language_name = result_language_dict.FindString("name");
if (language_code && language_name) {
lens::mojom::LanguagePtr language = lens::mojom::Language::New();
language->language_code = language_code->c_str();
language->name = language_name->c_str();
languages_list.push_back(std::move(language));
}
}
return languages_list;
}
std::unique_ptr<network::SimpleURLLoader>
LensOverlayLanguagesController::InitializeURLLoader() {
std::unique_ptr<network::ResourceRequest> resource_request =
std::make_unique<network::ResourceRequest>();
resource_request->credentials_mode = network::mojom::CredentialsMode::kOmit;
locale_ = g_browser_process->GetApplicationLocale();
resource_request->url = BuildTranslateLanguagesURL(
l10n_util::GetCountry(locale_), l10n_util::GetLanguage(locale_));
google_apis::AddDefaultAPIKeyToRequest(*resource_request,
chrome::GetChannel());
return network::SimpleURLLoader::Create(std::move(resource_request),
kTrafficAnnotationTag);
}
} // namespace lens
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