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#include "slxbrowser.h"
#include "webview.h"
#include <QtWebKitWidgets>
#include <QWebPage>
#include <QNetworkReply>
#include <QSslConfiguration>
#include <QProgressBar>

SLXbrowser::SLXbrowser(QString url, bool fullscreen, bool ignoreSslErrors, int reloadIntervalSeconds)
    : QMainWindow(nullptr),
	  _url(url),
	  _ignoreSslErrors(ignoreSslErrors),
      _unsupportedUri(false),
	  _reloadIntervalMs(reloadIntervalSeconds * 1000)
{
	if (fullscreen) {
		this->showFullScreen();
		this->setWindowFlags(windowFlags() | Qt::WindowStaysOnTopHint);
	}
	//QWebSettings::globalSettings()->setAttribute(QWebSettings::DeveloperExtrasEnabled, true);
	QWidget *w = new QWidget;
	QLayout *l = new QVBoxLayout;
	_browser = new WebView;
	_progress = new QProgressBar;
	_progress->hide();
	l->addWidget(_browser);
	l->addWidget(_progress);
	l->setMargin(0);
	l->setSpacing(0);
	l->setContentsMargins(0,0,0,0);
	w->setContentsMargins(0,0,0,0);
	w->setLayout(l);
	this->setCentralWidget(w);

	_reset.setSingleShot(true);
	connect(&_reset, SIGNAL(timeout()), this, SLOT(reloadInitial()));

	connect(_browser, SIGNAL(loadStarted()), this, SLOT(loadStarted()));
	connect(_browser, SIGNAL(loadFinished(bool)), this, SLOT(loadFinished(bool)));
	connect(_browser, SIGNAL(loadProgress(int)), this, SLOT(loadProgress(int)));
	//
	QWebPage *page = _browser->page();
	QNetworkAccessManager *nam = new QNetworkAccessManager(this);
	connect(nam, SIGNAL(sslErrors(QNetworkReply*, const QList<QSslError>&)),
			this, SLOT(sslErrors(QNetworkReply*, const QList<QSslError>&)));
	connect(nam, SIGNAL(finished(QNetworkReply*)), this, SLOT(requestFinished(QNetworkReply*)));
	page->setNetworkAccessManager(nam);
	page->mainFrame()->load(url);
	//
	_browser->show();
}

SLXbrowser::~SLXbrowser()
{
}

void SLXbrowser::loadStarted()
{
	_reset.stop();
	if (_reloadIntervalMs > 0) {
		_reset.start(_reloadIntervalMs + 10000);
	}
	_normalError.clear();
	_sslErrors.clear();
	_progress->setValue(0);
	_progress->show();
}

void SLXbrowser::loadFinished(bool ok)
{
	_progress->hide();
    if (!_browser->wasAbortedDownload() && !_unsupportedUri && !ok) {
		_browser->page()->mainFrame()->setHtml("<html><body style='background:blue;color:white'><br><br><center><h1>Page Load Error</h1><pre id='content'></pre></body></html>");
		QWebElement el = _browser->page()->mainFrame()->documentElement().findFirst("#content");
		QString str;
		if (!_sslErrors.empty()) {
			str.append("SSL Errors:\n");
			for (QSslError err : _sslErrors) {
				str.append(err.errorString());
				str.append('\n');
			}
		} else if (_normalError.length() != 0) {
			str.append("Load Error:\n");
			str.append(_normalError);
		} else {
			str.append("Unknown Error");
		}
		str.append("\n\n\n\n" + QDateTime::currentDateTime().toString());
		el.setPlainText(str);
		_sslErrors.clear();
		_normalError.clear();
		_reset.start(30000);
	} else if (_reloadIntervalMs > 0) {
        _reset.start(_reloadIntervalMs);
	}
    if (_unsupportedUri && !ok) {
        QMessageBox::warning(this->parentWidget(), QString::fromUtf8("Denied"),
                QString::fromUtf8("This URL type is not supported.\n\n"
                        "Diese Art Link wird nicht unterstützt.\n\n"
                        "(z.B. Mail)"));
    }
    _unsupportedUri = false;
}

void SLXbrowser::loadProgress(int progress)
{
	_progress->setValue(progress);
}

void SLXbrowser::sslErrors(QNetworkReply* reply, const QList<QSslError>& errors)
{
	if (_ignoreSslErrors) {
		reply->ignoreSslErrors();
		return;
	}
	_sslErrors.append(errors);
}

void SLXbrowser::requestFinished(QNetworkReply *reply)
{
    if (reply->error() == QNetworkReply::NoError) {
        _unsupportedUri = false;
    } else if (reply->error() == QNetworkReply::ProtocolUnknownError) {
        _unsupportedUri = true;
    } else {
        qDebug() << reply->error();
		_normalError = reply->errorString();
	}
}

void SLXbrowser::reloadInitial()
{
	_browser->page()->mainFrame()->load(_url);
}