From 4f2acaa4896cd68699938aa954b337fea480115d Mon Sep 17 00:00:00 2001
From: Nils Schwabe
Date: Fri, 4 Apr 2014 16:08:35 +0200
Subject: added cache to news and help, fixed filter bug

---
 src/dialog.cpp | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 75 insertions(+), 2 deletions(-)

(limited to 'src/dialog.cpp')

diff --git a/src/dialog.cpp b/src/dialog.cpp
index 8db4a4b..233ca32 100644
--- a/src/dialog.cpp
+++ b/src/dialog.cpp
@@ -426,6 +426,11 @@ void Dialog::onTabButtonChanged(int tab) {
 		ui->filterEdit->setEnabled(true);
 	}
 
+	// clear filter if necessary
+	if (activeTab != tab) {
+		this->ui->filterEdit->setText("");
+	}
+
 	// load the new list
 	setListModel(model_[tab]);
 	this->activeTab = tab;
@@ -474,8 +479,23 @@ void Dialog::on_helpNewsButton_clicked() {
 void Dialog::addNewsAfterDownload(QNetworkReply* reply) {
 	if (reply->error() != QNetworkReply::NoError) {
 		if (debugMode) {
-			qDebug() << "Could not get news.";
+			qDebug() << "Could not get news. Try to get cached news.";
+		}
+
+		// try to get cached news
+		QFile backup_file(news_backup_filename);
+
+		if (!backup_file.open(QIODevice::ReadOnly)) {
+			if (debugMode) {
+				qDebug() << "Cannot read backup file " << news_backup_filename << " either";
+			}
+			this->ui->newsTextBrowser->setText(QCoreApplication::instance()->translate("Dialog", "Could not get news."));
+			return;
+		}
+		if (debugMode) {
+			qDebug() << "Used backup file " << news_backup_filename;
 		}
+		backup_file.close();
 		return;
 	}
 	QByteArray data = reply->readAll();
@@ -500,13 +520,47 @@ void Dialog::addNewsAfterDownload(QNetworkReply* reply) {
 
     // update ini
     ChooserSettings::setSetting("last-news", QString::number(timestamp.toTime_t()));
+
+	// make backup
+	QFile file(news_backup_filename);
+	if (!file.open(QIODevice::WriteOnly)) {
+		if (debugMode) {
+			qDebug() << "Could not write XML to " << xml_filename;
+		}
+		return;
+	}
+
+	if (file.write(data) != data.length()) {
+		return;
+	}
+	if (!file.setPermissions(QFile::ReadUser | QFile::ReadGroup | QFile::ReadOther | QFile::WriteUser | QFile::WriteGroup | QFile::WriteOther)) {
+		if (debugMode) {
+			qDebug() << "Could not change permissions of file: " << news_backup_filename;
+		}
+	}
+	file.close();
 }
 
 void Dialog::addHelpAfterDownload(QNetworkReply* reply) {
 	if (reply->error() != QNetworkReply::NoError) {
 		if (debugMode) {
-			qDebug() << "Could not get news.";
+			qDebug() << "Could not get help xml. Try to get cached help...";
 		}
+
+		// try to get cached news
+		QFile backup_file(help_backup_filename);
+
+		if (!backup_file.open(QIODevice::ReadOnly)) {
+			if (debugMode) {
+				qDebug() << "Cannot read backup file " << help_backup_filename << " either";
+			}
+			this->ui->helpTextBrowser->setText(QCoreApplication::instance()->translate("Dialog", "Could not get help."));
+			return;
+		}
+		if (debugMode) {
+			qDebug() << "Used backup file " << help_backup_filename;
+		}
+		backup_file.close();
 		return;
 	}
 
@@ -521,6 +575,25 @@ void Dialog::addHelpAfterDownload(QNetworkReply* reply) {
 	}
 
 	ui->helpTextBrowser->setText(QString(data));
+
+	// make backup
+	QFile file(help_backup_filename);
+	if (!file.open(QIODevice::WriteOnly)) {
+		if (debugMode) {
+			qDebug() << "Could not write XML to " << xml_filename;
+		}
+		return;
+	}
+
+	if (file.write(data) != data.length()) {
+		return;
+	}
+	if (!file.setPermissions(QFile::ReadUser | QFile::ReadGroup | QFile::ReadOther | QFile::WriteUser | QFile::WriteGroup | QFile::WriteOther)) {
+		if (debugMode) {
+			qDebug() << "Could not change permissions of file: " << help_backup_filename;
+		}
+	}
+	file.close();
 }
 
 void Dialog::keyPressEvent(QKeyEvent* event) {
-- 
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