Client update implementation

cockatrice/src/update_checker.cpp

@@ -0,0 +1,121 @@
+//
+// Created by miguel on 28/12/15.
+//
+
+#include <algorithm>
+#include <QMessageBox>
+
+#include "update_checker.h"
+#include "version_string.h"
+#include "qt-json/json.h"
+
+#define LATEST_FILES_URL "https://api.bintray.com/packages/cockatrice/Cockatrice/Cockatrice/files"
+
+UpdateChecker::UpdateChecker(QObject *parent) : QObject(parent){
+    //Parse the commit date. We'll use this to check for new versions
+    //We know the format because it's based on `git log` which is documented here:
+    //  https://git-scm.com/docs/git-log#_commit_formatting
+    buildDate = QDate::fromString(VERSION_DATE, "yyyy-MM-dd");
+    latestFilesUrl = QUrl(LATEST_FILES_URL);
+    response = NULL;
+    netMan = new QNetworkAccessManager(this);
+    build = NULL;
+}
+
+UpdateChecker::~UpdateChecker()
+{
+    delete build;
+}
+
+void UpdateChecker::check()
+{
+    response = netMan->get(QNetworkRequest(latestFilesUrl));
+    connect(response, SIGNAL(finished()),
+            this, SLOT(fileListFinished()));
+}
+
+#if defined(Q_OS_OSX)
+bool UpdateChecker::downloadMatchesCurrentOS(QVariant build)
+{
+   return build
+            .toMap()["name"]
+            .toString()
+            .contains("osx");
+}
+#elif defined(Q_OS_WIN)
+#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
+bool UpdateChecker::downloadMatchesCurrentOS(QVariant build)
+{
+       return build
+            .toMap()["name"]
+            .toString()
+            .contains("qt5.exe");
+}
+#else
+bool UpdateChecker::downloadMatchesCurrentOS(QVariant build)
+{
+       return build
+            .toMap()["name"]
+            .toString()
+            .contains("qt4.exe");
+}
+#endif
+#else
+
+bool UpdateChecker::downloadMatchesCurrentOS(QVariant)
+{
+    //If the OS doesn't fit one of the above #defines, then it will never match
+    return false;
+}
+
+#endif
+
+QDate UpdateChecker::dateFromBuild(QVariant build)
+{
+    QString formatString = "yyyy-MM-dd";
+    QString dateString = build.toMap()["date"].toString();
+    dateString = dateString.remove(formatString.length(), dateString.length());
+
+    return QDate::fromString(dateString, formatString);
+}
+
+QDate UpdateChecker::findOldestBuild(QVariantList allBuilds)
+{
+    //Map the build array into an array of dates
+    std::vector<QDate> dateArray(allBuilds.size());
+    std::transform(allBuilds.begin(), allBuilds.end(), dateArray.begin(), dateFromBuild);
+
+    //Return the first date
+    return *std::min_element(dateArray.begin(), dateArray.end());
+}
+
+QVariantMap *UpdateChecker::findCompatibleBuild(QVariantList allBuilds) {
+
+    QVariantList::iterator result = std::find_if(allBuilds.begin(), allBuilds.end(), downloadMatchesCurrentOS);
+
+    //If there is no compatible version, return NULL
+    if (result == allBuilds.end())
+        return NULL;
+    else
+    {
+        QVariantMap *ret = new QVariantMap;
+        *ret = (*result).toMap();
+        return ret;
+    }
+}
+
+void UpdateChecker::fileListFinished() {
+    try {
+        QVariantList builds = QtJson::Json::parse(response->readAll()).toList();
+        build = findCompatibleBuild(builds);
+        QDate bintrayBuildDate = findOldestBuild(builds);
+
+        bool needToUpdate = bintrayBuildDate > buildDate;
+        bool compatibleVersion = build != NULL;
+
+        emit finishedCheck(needToUpdate, compatibleVersion, build);
+    }
+    catch (const std::exception &exc){
+        emit error(exc.what());
+    }
+}