Update check fixes/improvements

qView.pro

@@ -137,8 +137,8 @@ DEFINES += QT_DEPRECATED_WARNINGS
 DEFINES += QT_NO_FOREACH
 
 # To disables both manual and automatic checking for updates either uncomment line below or
-# add config flag while building from the commad line.
-CONFIG += qv_disable_online_version_check
+# add config flag while building from the command line.
+#CONFIG += qv_disable_online_version_check
 
 qv_disable_online_version_check {
     DEFINES += QV_DISABLE_ONLINE_VERSION_CHECK

src/qvaboutdialog.cpp

@@ -74,7 +74,7 @@ QVAboutDialog::QVAboutDialog(double givenLatestVersionNum, QWidget *parent) :
 #ifndef QV_DISABLE_ONLINE_VERSION_CHECK
     if (latestVersionNum < 0.0)
     {
-        qvApp->checkUpdates();
+        qvApp->checkUpdates(false);
         latestVersionNum = 0.0;
     }
 #endif //QV_DISABLE_ONLINE_VERSION_CHECK

src/qvapplication.cpp

@@ -29,7 +29,7 @@ QVApplication::QVApplication(int &argc, char **argv) : QApplication(argc, argv)
     // Check for updates
     // TODO: move this to after first window show event
     if (getSettingsManager().getBoolean("updatenotifications")) {
-        checkUpdates();
+        checkUpdates(true);
     }
 
     // Setup macOS dock menu
@@ -196,10 +196,10 @@ MainWindow *QVApplication::getMainWindow(bool shouldBeEmpty)
     return window;
 }
 
-void QVApplication::checkUpdates()
+void QVApplication::checkUpdates(bool isStartupCheck)
 {
 #ifndef QV_DISABLE_ONLINE_VERSION_CHECK
-    updateChecker.check();
+    updateChecker.check(isStartupCheck);
 #endif // QV_DISABLE_ONLINE_VERSION_CHECK
 }
 

src/qvapplication.h

@@ -41,7 +41,7 @@ class QVApplication : public QApplication
 
     MainWindow *getMainWindow(bool shouldBeEmpty);
 
-    void checkUpdates();
+    void checkUpdates(bool isStartupCheck);
 
     void checkedUpdates();
 

src/updatechecker.cpp

@@ -14,9 +14,16 @@ UpdateChecker::UpdateChecker(QObject *parent) : QObject(parent)
     connect(&netAccessManager, &QNetworkAccessManager::finished, this, &UpdateChecker::readReply);
 }
 
-void UpdateChecker::check()
+void UpdateChecker::check(bool isStartupCheck)
 {
-    sendRequest(UPDATE_URL);
+    if (isStartupCheck)
+    {
+        QDateTime lastCheckTime = getLastCheckTime();
+        if (lastCheckTime.isValid() && QDateTime::currentDateTimeUtc() < lastCheckTime.addSecs(STARTUP_CHECK_INTERVAL_HOURS * 3600))
+            return;
+    }
+
+    sendRequest(UPDATE_URL + "/latest");
 }
 
 void UpdateChecker::sendRequest(const QUrl &url)
@@ -49,20 +56,38 @@ void UpdateChecker::readReply(QNetworkReply *reply)
         return;
     }
 
-    QJsonObject object = json.array().first().toObject();
+    QJsonObject object = json.object();
 
     latestVersionNum = object.value("tag_name").toString("0.0").toDouble();
 
-    QStringList changelogList = object.value("body").toString().split("\n");
+    static const QRegularExpression newLineRegEx("\r?\n");
+    QStringList changelogList = object.value("body").toString().split(newLineRegEx);
+    // remove "changelog" heading
     changelogList.removeFirst();
-    changelog = changelogList.join("");
+    // remove additional newline if present
+    if (!changelogList.isEmpty() && changelogList.first().isEmpty())
+        changelogList.removeFirst();
+    changelog = changelogList.join("\n");
 
     releaseDate = QDateTime::fromString(object.value("published_at").toString(), Qt::ISODate);
     releaseDate = releaseDate.toTimeSpec(Qt::LocalTime);
 
+    setLastCheckTime(QDateTime::currentDateTimeUtc());
+
     emit checkedUpdates();
 }
 
+QDateTime UpdateChecker::getLastCheckTime() const
+{
+    qint64 secsSinceEpoch = QSettings().value("lastupdatecheck").toLongLong();
+    return secsSinceEpoch == 0 ? QDateTime() : QDateTime::fromSecsSinceEpoch(secsSinceEpoch, Qt::UTC);
+}
+
+void UpdateChecker::setLastCheckTime(QDateTime value)
+{
+    QSettings().setValue("lastupdatecheck", value.toSecsSinceEpoch());
+}
+
 void UpdateChecker::openDialog()
 {
     QLocale locale;
@@ -71,7 +96,7 @@ void UpdateChecker::openDialog()
     auto *msgBox = new QMessageBox();
     msgBox->setWindowTitle(tr("qView Update Available"));
     msgBox->setText(tr("qView %1 is available to download.").arg(QString::number(latestVersionNum, 'f', 1))
-                    + "\n\n" + releaseDate.toString(locale.dateFormat()) + "\n" + changelog);
+                    + "\n\n" + releaseDate.toString(locale.dateFormat()) + "\n\n" + changelog);
     msgBox->setWindowModality(Qt::ApplicationModal);
     msgBox->setStandardButtons(QMessageBox::Close | QMessageBox::Reset);
     msgBox->button(QMessageBox::Reset)->setText(tr("&Disable Update Checking"));

src/updatechecker.h

@@ -9,7 +9,7 @@ class UpdateChecker : public QObject
 public:
     explicit UpdateChecker(QObject *parent = nullptr);
 
-    void check();
+    void check(bool isStartupCheck);
 
     void openDialog();
 
@@ -23,11 +23,15 @@ class UpdateChecker : public QObject
 
     void readReply(QNetworkReply *reply);
 
-    bool showSystemNotification();
+    QDateTime getLastCheckTime() const;
+
+    void setLastCheckTime(QDateTime value);
 
 private:
     const QString UPDATE_URL = "https://api.github.com/repos/jurplel/qview/releases";
     const QString DOWNLOAD_URL = "https://interversehq.com/qview/download/";
+    // If update checking is enabled, this rate limits the auto-check that happens at startup
+    const int STARTUP_CHECK_INTERVAL_HOURS = 4;
 
     double latestVersionNum;