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/**
* @file lltranslate.h
* @brief Human language translation class and JSON response receiver.
*
* $LicenseInfo:firstyear=2009&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLTRANSLATE_H
#define LL_LLTRANSLATE_H
#include "llhttpclient.h"
#include "llbufferstream.h"
namespace Json
{
class Value;
}
class LLTranslationAPIHandler
{
public:
virtual void getTranslateURL(
std::string &url,
const std::string &from_lang,
const std::string &to_lang,
const std::string &text) const = 0;
virtual void getKeyVerificationURL(
std::string &url,
const std::string &key) const = 0;
virtual bool parseResponse(
int& status,
const std::string& body,
std::string& translation,
std::string& detected_lang,
std::string& err_msg) const = 0;
virtual ~LLTranslationAPIHandler() {}
protected:
static const int STATUS_OK = 200;
};
class LLGoogleTranslationHandler : public LLTranslationAPIHandler
{
LOG_CLASS(LLGoogleTranslationHandler);
public:
/*virtual*/ void getTranslateURL(
std::string &url,
const std::string &from_lang,
const std::string &to_lang,
const std::string &text) const;
/*virtual*/ void getKeyVerificationURL(
std::string &url,
const std::string &key) const;
/*virtual*/ bool parseResponse(
int& status,
const std::string& body,
std::string& translation,
std::string& detected_lang,
std::string& err_msg) const;
private:
static void parseErrorResponse(
const Json::Value& root,
int& status,
std::string& err_msg);
static bool parseTranslation(
const Json::Value& root,
std::string& translation,
std::string& detected_lang);
static std::string getAPIKey();
};
class LLBingTranslarionHandler : public LLTranslationAPIHandler
{
LOG_CLASS(LLBingTranslarionHandler);
public:
/*virtual*/ void getTranslateURL(
std::string &url,
const std::string &from_lang,
const std::string &to_lang,
const std::string &text) const;
/*virtual*/ void getKeyVerificationURL(
std::string &url,
const std::string &key) const;
/*virtual*/ bool parseResponse(
int& status,
const std::string& body,
std::string& translation,
std::string& detected_lang,
std::string& err_msg) const;
private:
static std::string getAPIKey();
};
class LLTranslate
{
LOG_CLASS(LLTranslate);
public :
typedef enum e_service {
SERVICE_BING,
SERVICE_GOOGLE,
} EService;
class TranslationReceiver: public LLHTTPClient::Responder
{
public:
/*virtual*/ void completedRaw(
U32 http_status,
const std::string& reason,
const LLChannelDescriptors& channels,
const LLIOPipe::buffer_ptr_t& buffer);
protected:
friend class LLTranslate;
TranslationReceiver(const std::string& from_lang, const std::string& to_lang);
virtual void handleResponse(const std::string &translation, const std::string &recognized_lang) = 0;
virtual void handleFailure(int status, const std::string& err_msg) = 0;
std::string mFromLang;
std::string mToLang;
const LLTranslationAPIHandler& mHandler;
};
class KeyVerificationReceiver: public LLHTTPClient::Responder
{
public:
EService getService() const;
protected:
KeyVerificationReceiver(EService service);
/*virtual*/ void completedRaw(
U32 http_status,
const std::string& reason,
const LLChannelDescriptors& channels,
const LLIOPipe::buffer_ptr_t& buffer);
virtual void setVerificationStatus(bool ok) = 0;
EService mService;
};
typedef boost::intrusive_ptr<TranslationReceiver> TranslationReceiverPtr;
typedef boost::intrusive_ptr<KeyVerificationReceiver> KeyVerificationReceiverPtr;
static void translateMessage(TranslationReceiverPtr &receiver, const std::string &from_lang, const std::string &to_lang, const std::string &mesg);
static void verifyKey(KeyVerificationReceiverPtr& receiver, const std::string& key);
static std::string getTranslateLanguage();
private:
static const LLTranslationAPIHandler& getPreferredHandler();
static const LLTranslationAPIHandler& getHandler(EService service);
static void sendRequest(const std::string& url, LLHTTPClient::ResponderPtr responder);
};
#endif
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