110 lines
3.7 KiB
C++
110 lines
3.7 KiB
C++
#include "Translator.h"
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#include <QDebug>
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#include <QNetworkRequest>
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#include <QNetworkReply>
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#include <QJsonDocument>
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#include <QJsonArray>
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#include <QJsonParseError>
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#include <QSettings>
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#include "Settings.h"
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#include "GoogleWebTranslator.h"
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#include "StAssert.h"
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namespace {
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const QString translateBaseUrl = "http://translate.google.com/translate_a/"
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"t?client=t&text=%1&sl=%2&tl=%3";
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}
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Translator::Translator (QObject *parent) :
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QObject (parent),
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network_ (this),
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useAlternativeTranslation_ (false) {
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connect (&network_, SIGNAL (finished (QNetworkReply *)),
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SLOT (replyFinished (QNetworkReply *)));
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GoogleWebTranslator *googleWeb = new GoogleWebTranslator;
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connect (this, SIGNAL (translateAlternative (ProcessingItem)),
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googleWeb, SLOT (translate (ProcessingItem)));
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connect (googleWeb, SIGNAL (translated (ProcessingItem, bool)),
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this, SLOT (translatedAlternative (ProcessingItem, bool)));
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connect (googleWeb, SIGNAL (error (QString)), this, SIGNAL (error (QString)));
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applySettings ();
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}
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void Translator::applySettings () {
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QSettings settings;
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settings.beginGroup (settings_names::translationGroup);
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translationLanguage_ = settings.value (settings_names::translationLanguage,
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settings_values::translationLanguage).toString ();
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sourceLanguage_ = settings.value (settings_names::sourceLanguage,
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settings_values::sourceLanguage).toString ();
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}
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void Translator::translate (ProcessingItem item) {
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if (useAlternativeTranslation_) {
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emit translateAlternative (item);
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return;
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}
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ST_ASSERT (!item.recognized.isEmpty ());
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QString sourceLanguage = item.sourceLanguage.isEmpty () ? sourceLanguage_ :
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item.sourceLanguage;
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if (translationLanguage_.isEmpty () || sourceLanguage.isEmpty ()) {
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emit error (tr ("Неверные парметры для перевода."));
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return;
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}
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QString translateLanguage = (item.translateLanguage.isEmpty ())
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? translationLanguage_ : item.translateLanguage;
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QUrl url (translateBaseUrl.arg (item.recognized, sourceLanguage, translateLanguage));
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QNetworkReply *reply = network_.get (QNetworkRequest (url));
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items_.insert (reply, item);
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}
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void Translator::translatedAlternative (ProcessingItem item, bool success) {
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if (success) {
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emit translated (item);
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}
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else {
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emit error (tr ("Ошибка альтернативного перевода текста: %1").arg (item.recognized));
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}
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}
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void Translator::replyFinished (QNetworkReply *reply) {
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ST_ASSERT (items_.contains (reply));
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ProcessingItem item = items_.take (reply);
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ST_ASSERT (reply->isFinished ());
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if (reply->error () != QNetworkReply::NoError) {
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useAlternativeTranslation_ = true;
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emit translateAlternative (item);
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reply->deleteLater ();
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return;
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}
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QByteArray data = reply->readAll ();
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reply->deleteLater ();
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while (data.indexOf (",,") != -1) {//make json valid
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data.replace (",,", ",");
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}
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QJsonParseError parseError;
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QJsonDocument document = QJsonDocument::fromJson (data, &parseError);
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if (document.isEmpty ()) {
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useAlternativeTranslation_ = true;
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emit translateAlternative (item);
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return;
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}
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QJsonArray answerArray = document.array ();
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QJsonArray fullTranslation = answerArray.first ().toArray ();
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QString translation = "";
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foreach (QJsonValue part, fullTranslation) {
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QJsonArray partTranslation = part.toArray ();
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if (partTranslation.isEmpty ()) {
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continue;
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}
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translation += partTranslation.at (0).toString ();
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}
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item.translated = translation;
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emit translated (item);
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}
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