Starting work on snapshots.

utils/fgqcanvas/applicationcontroller.cpp

@@ -65,7 +65,7 @@ void ApplicationController::save(QString configName)
     // convert spaces to underscores
     QString filesystemCleanName = configName.replace(QRegularExpression("[\\s-\\\"/]"), "_");
 
-    QFile f(d.filePath(configName + ".json"));
+    QFile f(d.filePath(filesystemCleanName + ".json"));
     if (f.exists()) {
         qWarning() << "not over-writing" << f.fileName();
         return;
@@ -107,6 +107,63 @@ void ApplicationController::rebuildConfigData()
     emit configListChanged(m_configs);
 }
 
+void ApplicationController::saveSnapshot(QString snapshotName)
+{
+    QDir d(QStandardPaths::writableLocation(QStandardPaths::AppDataLocation));
+    d.cd("Snapshots");
+    if (!d.exists()) {
+        d.mkpath(".");
+    }
+
+    // convert spaces to underscores
+    QString filesystemCleanName = snapshotName.replace(QRegularExpression("[\\s-\\\"/]"), "_");
+    QFile f(d.filePath(filesystemCleanName + ".json"));
+    if (f.exists()) {
+        qWarning() << "not over-writing" << f.fileName();
+        return;
+    }
+
+    f.open(QIODevice::WriteOnly | QIODevice::Truncate);
+    f.write(createSnapshot(snapshotName));
+
+    QVariantMap m;
+    m["path"] = f.fileName();
+    m["name"] = snapshotName;
+    m_snapshots.append(m);
+    emit snapshotListChanged();
+}
+
+void ApplicationController::restoreSnapshot(int index)
+{
+
+}
+
+void ApplicationController::rebuildSnapshotData()
+{
+    m_snapshots.clear();
+    QDir d(QStandardPaths::writableLocation(QStandardPaths::AppDataLocation));
+    d.cd("Snapshots");
+    if (!d.exists()) {
+        emit snapshotListChanged();
+        return;
+    }
+
+    // this requires parsing each snapshit in its entirety just to extract
+    // the name, which is horrible.
+    Q_FOREACH (auto entry, d.entryList(QStringList() << "*.json")) {
+        QFile f(d.filePath(entry));
+        f.open(QIODevice::ReadOnly);
+        QJsonDocument doc = QJsonDocument::fromJson(f.readAll());
+
+        QVariantMap m;
+        m["path"] = f.fileName();
+        m["name"] = doc.object().value("snapshotName").toString();
+        m_snapshots.append(m);
+    }
+
+    emit snapshotListChanged();
+}
+
 void ApplicationController::query()
 {
     if (m_query) {
@@ -345,3 +402,22 @@ void ApplicationController::clearConnections()
     m_activeCanvases.clear();
     emit activeCanvasesChanged();
 }
+
+QByteArray ApplicationController::createSnapshot(QString name) const
+{
+    QJsonObject json;
+    json["snapshotName"] = name;
+#if 0
+    QJsonArray canvases;
+    Q_FOREACH (auto canvas, m_activeCanvases) {
+        canvases.append(canvas->saveState());
+    }
+
+    json["canvases"] = canvases;
+    // background color?
+    // window geometry and state?
+#endif
+    QJsonDocument doc;
+    doc.setObject(json);
+    return doc.toJson();
+}

utils/fgqcanvas/applicationcontroller.h

@@ -36,6 +36,7 @@ class ApplicationController : public QObject
 
     Q_PROPERTY(QVariantList canvases READ canvases NOTIFY canvasListChanged)
     Q_PROPERTY(QVariantList configs READ configs NOTIFY configListChanged)
+    Q_PROPERTY(QVariantList snapshots READ snapshots NOTIFY snapshotListChanged)
 
 
     Q_PROPERTY(QQmlListProperty<CanvasConnection> activeCanvases READ activeCanvases NOTIFY activeCanvasesChanged)
@@ -47,18 +48,20 @@ public:
     explicit ApplicationController(QObject *parent = nullptr);
     ~ApplicationController();
 
-    Q_INVOKABLE void save(QString configName);
     Q_INVOKABLE void query();
     Q_INVOKABLE void cancelQuery();
     Q_INVOKABLE void clearQuery();
 
+    Q_INVOKABLE void save(QString configName);
     Q_INVOKABLE void restoreConfig(int index);
     Q_INVOKABLE void deleteConfig(int index);
     Q_INVOKABLE void saveConfigChanges(int index);
 
     Q_INVOKABLE void openCanvas(QString path);
 
-// void restore();
+    Q_INVOKABLE void saveSnapshot(QString snapshotName);
+    Q_INVOKABLE void restoreSnapshot(int index);
+
     QString host() const;
 
     unsigned int port() const;
@@ -86,6 +89,11 @@ public:
         return m_configs;
     }
 
+    QVariantList snapshots() const
+    {
+        return m_snapshots;
+    }
+
 signals:
 
     void hostChanged(QString host);
@@ -99,6 +107,8 @@ signals:
 
     void configListChanged(QVariantList configs);
 
+    void snapshotListChanged();
+
 public slots:
     void setHost(QString host);
 
@@ -111,6 +121,7 @@ private:
     void setStatus(Status newStatus);
 
     void rebuildConfigData();
+    void rebuildSnapshotData();
     void clearConnections();
 
     void doSaveToFile(QString path, QString configName);
@@ -118,6 +129,8 @@ private:
     QByteArray saveState(QString name) const;
     void restoreState(QByteArray bytes);
 
+    QByteArray createSnapshot(QString name) const;
+
     QString m_host;
     unsigned int m_port;
     QVariantList m_canvases;
@@ -126,7 +139,7 @@ private:
     Status m_status;
     QVariantList m_configs;
     QNetworkReply* m_query = nullptr;
-
+    QVariantList m_snapshots;
 };
 
 #endif // APPLICATIONCONTROLLER_H