Add automatic update checking. Fixes #8

app/app.pro

@@ -82,7 +82,8 @@ SOURCES += \
     streaming/audio.cpp \
     gui/computermodel.cpp \
     gui/appmodel.cpp \
-    streaming/streamutils.cpp
+    streaming/streamutils.cpp \
+    backend/autoupdatechecker.cpp
 
 HEADERS += \
     utils.h \
@@ -97,7 +98,8 @@ HEADERS += \
     gui/computermodel.h \
     gui/appmodel.h \
     streaming/video/decoder.h \
-    streaming/streamutils.h
+    streaming/streamutils.h \
+    backend/autoupdatechecker.h
 
 # Platform-specific renderers and decoders
 ffmpeg {
@@ -203,3 +205,4 @@ macx {
 }
 
 VERSION = 0.1.0
+DEFINES += VERSION_STR=\\\"0.1.0\\\"

app/backend/autoupdatechecker.cpp

@@ -0,0 +1,142 @@
+#include "autoupdatechecker.h"
+
+#include <QNetworkReply>
+#include <QJsonDocument>
+#include <QJsonArray>
+#include <QJsonObject>
+
+AutoUpdateChecker::AutoUpdateChecker(QObject *parent) :
+    QObject(parent),
+    m_Nam(this)
+{
+    // Never communicate over HTTP
+    m_Nam.setStrictTransportSecurityEnabled(true);
+
+    connect(&m_Nam, SIGNAL(finished(QNetworkReply*)),
+            this, SLOT(handleUpdateCheckRequestFinished(QNetworkReply*)));
+
+    QString currentVersion(VERSION_STR);
+    qDebug() << "Current Moonlight version:" << currentVersion;
+    parseStringToVersionQuad(currentVersion, m_CurrentVersionQuad);
+
+    // Should at least have a 1.0-style version number
+    Q_ASSERT(m_CurrentVersionQuad.count() > 1);
+}
+
+void AutoUpdateChecker::start()
+{
+#if defined(Q_OS_WIN32) || defined(Q_OS_DARWIN) // Only run update checker on platforms without auto-update
+    // We'll get a callback when this is finished
+    QUrl url("https://moonlight-stream.com/updates/qt.json");
+    m_Nam.get(QNetworkRequest(url));
+#endif
+}
+
+void AutoUpdateChecker::parseStringToVersionQuad(QString& string, QVector<int>& version)
+{
+    QStringList list = string.split('.');
+    for (const QString& component : list) {
+        version.append(component.toInt());
+    }
+}
+
+void AutoUpdateChecker::handleUpdateCheckRequestFinished(QNetworkReply* reply)
+{
+    Q_ASSERT(reply->isFinished());
+
+    if (reply->error() == QNetworkReply::NoError) {
+        QTextStream stream(reply);
+        stream.setCodec("UTF-8");
+
+        // Read all data and queue the reply for deletion
+        QString jsonString = stream.readAll();
+        reply->deleteLater();
+
+        QJsonParseError error;
+        QJsonDocument jsonDoc = QJsonDocument::fromJson(jsonString.toUtf8(), &error);
+        if (jsonDoc.isNull()) {
+            qWarning() << "Update manifest malformed:" << error.errorString();
+            return;
+        }
+
+        QJsonArray array = jsonDoc.array();
+        if (array.isEmpty()) {
+            qWarning() << "Update manifest doesn't contain an array";
+            return;
+        }
+
+        for (QJsonValueRef updateEntry : array) {
+            if (updateEntry.isObject()) {
+                QJsonObject updateObj = updateEntry.toObject();
+                if (!updateObj.contains("platform") ||
+                        !updateObj.contains("arch") ||
+                        !updateObj.contains("version") ||
+                        !updateObj.contains("browser_url")) {
+                    qWarning() << "Update manifest entry missing vital field";
+                    continue;
+                }
+
+                if (!updateObj["platform"].isString() ||
+                        !updateObj["arch"].isString() ||
+                        !updateObj["version"].isString() ||
+                        !updateObj["browser_url"].isString()) {
+                    qWarning() << "Update manifest entry has unexpected vital field type";
+                    continue;
+                }
+
+                if (updateObj["arch"] == QSysInfo::buildCpuArchitecture() &&
+                        updateObj["platform"] == QSysInfo::productType()) {
+                    qDebug() << "Found update manifest match for current platform";
+
+                    QString latestVersion = updateObj["version"].toString();
+                    qDebug() << "Latest version of Moonlight for this platform is:" << latestVersion;
+
+                    QVector<int> latestVersionQuad;
+
+                    parseStringToVersionQuad(latestVersion, latestVersionQuad);
+
+                    for (int i = 0;; i++) {
+                        int latestVer = 0;
+                        int currentVer = 0;
+
+                        // Treat missing decimal places as 0
+                        if (i < latestVersionQuad.count()) {
+                            latestVer = latestVersionQuad[i];
+                        }
+                        if (i < m_CurrentVersionQuad.count()) {
+                            currentVer = m_CurrentVersionQuad[i];
+                        }
+                        if (i >= latestVersionQuad.count() && i >= m_CurrentVersionQuad.count()) {
+                            break;
+                        }
+
+                        if (currentVer < latestVer) {
+                            qDebug() << "Update available";
+
+                            emit onUpdateAvailable(updateObj["browser_url"].toString());
+                            return;
+                        }
+                        else if (currentVer > latestVer) {
+                            qDebug() << "Update manifest version lower than current version";
+                            return;
+                        }
+                    }
+
+                    qDebug() << "Update manifest version equal to current version";
+
+                    return;
+                }
+            }
+            else {
+                qWarning() << "Update manifest contained unrecognized entry:" << updateEntry.toString();
+            }
+        }
+
+        qWarning() << "No entry in update manifest found for current platform: "
+                   << QSysInfo::buildCpuArchitecture() << QSysInfo::productType();
+    }
+    else {
+        qWarning() << "Update checking failed with error: " << reply->error();
+        reply->deleteLater();
+    }
+}

app/backend/autoupdatechecker.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <QObject>
+#include <QNetworkAccessManager>
+
+class AutoUpdateChecker : public QObject
+{
+    Q_OBJECT
+public:
+    explicit AutoUpdateChecker(QObject *parent = nullptr);
+
+    Q_INVOKABLE void start();
+
+signals:
+    void onUpdateAvailable(QString url);
+
+private slots:
+    void handleUpdateCheckRequestFinished(QNetworkReply* reply);
+
+private:
+    void parseStringToVersionQuad(QString& string, QVector<int>& version);
+
+    QVector<int> m_CurrentVersionQuad;
+    QNetworkAccessManager m_Nam;
+};

app/gui/main.qml

@@ -4,6 +4,8 @@ import QtQuick.Layouts 1.3
 
 import QtQuick.Controls.Material 2.1
 
+import AutoUpdateChecker 1.0
+
 ApplicationWindow {
     id: window
     visible: true
@@ -66,6 +68,36 @@ ApplicationWindow {
                 Layout.fillWidth: true
             }
 
+            ToolButton {
+                property string browserUrl: ""
+
+                id: updateButton
+                icon.source: "qrc:/res/update.svg"
+
+                // Invisible until we get a callback notifying us that
+                // an update is available
+                visible: false
+
+                onClicked: Qt.openUrlExternally(browserUrl);
+
+                Menu {
+                    x: parent.width
+                    transformOrigin: Menu.TopRight
+                }
+
+
+                function updateAvailable(url)
+                {
+                    updateButton.browserUrl = url
+                    updateButton.visible = true
+                }
+
+                Component.onCompleted: {
+                    AutoUpdateChecker.onUpdateAvailable.connect(updateAvailable)
+                    AutoUpdateChecker.start()
+                }
+            }
+
             ToolButton {
                 icon.source: "qrc:/res/question_mark.svg"
 
@@ -73,7 +105,6 @@ ApplicationWindow {
                 onClicked: Qt.openUrlExternally("https://github.com/moonlight-stream/moonlight-docs/wiki/Setup-Guide");
 
                 Menu {
-                    id: helpButton
                     x: parent.width
                     transformOrigin: Menu.TopRight
                 }
@@ -87,7 +118,6 @@ ApplicationWindow {
                 onClicked: navigateTo("qrc:/gui/GamepadMapper.qml", "Gamepad Mapping")
 
                 Menu {
-                    id: gamepadMappingMenu
                     x: parent.width
                     transformOrigin: Menu.TopRight
                 }
@@ -98,7 +128,6 @@ ApplicationWindow {
                 onClicked: navigateTo("qrc:/gui/SettingsView.qml", "Settings")
 
                 Menu {
-                    id: optionsMenu
                     x: parent.width
                     transformOrigin: Menu.TopRight
                 }

app/main.cpp

@@ -13,6 +13,7 @@
 
 #include "gui/computermodel.h"
 #include "gui/appmodel.h"
+#include "backend/autoupdatechecker.h"
 #include "streaming/session.hpp"
 #include "settings/streamingpreferences.h"
 
@@ -172,6 +173,11 @@ int main(int argc, char *argv[])
                                               [](QQmlEngine*, QJSEngine*) -> QObject* {
                                                   return new ComputerManager();
                                               });
+    qmlRegisterSingletonType<AutoUpdateChecker>("AutoUpdateChecker", 1, 0,
+                                                "AutoUpdateChecker",
+                                                [](QQmlEngine*, QJSEngine*) -> QObject* {
+                                                    return new AutoUpdateChecker();
+                                                });
 
     QQuickStyle::setStyle("Material");
 

app/res/update.svg

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" fill="#009624" version="1.1" width="24" height="24" viewBox="0 0 24 24">
+    <path d="M21,10.12H14.22L16.96,7.3C14.23,4.6 9.81,4.5 7.08,7.2C4.35,9.91 4.35,14.28 7.08,17C9.81,19.7 14.23,19.7 16.96,17C18.32,15.65 19,14.08 19,12.1H21C21,14.08 20.12,16.65 18.36,18.39C14.85,21.87 9.15,21.87 5.64,18.39C2.14,14.92 2.11,9.28 5.62,5.81C9.13,2.34 14.76,2.34 18.27,5.81L21,3V10.12M12.5,8V12.25L16,14.33L15.28,15.54L11,13V8H12.5Z" />
+</svg>

app/resources.qrc

@@ -13,5 +13,6 @@
         <file>res/arrow_left.svg</file>
         <file>res/question_mark.svg</file>
         <file>res/moonlight.svg</file>
+        <file>res/update.svg</file>
     </qresource>
 </RCC>