Add calculating stats with script

scriptengine.cpp

@@ -3,6 +3,7 @@
 #include <QFileInfo>
 #include <QDebug>
 #include "loadrunable.h"
+#include "rawimage.h"
 
 namespace Script
 {
@@ -63,6 +64,11 @@ bool ScriptEngine::isMarked(const File *file) const
     return _database->isMarked(file->absoluteFilePath());
 }
 
+QJSValue ScriptEngine::newObject()
+{
+    return _jsEngine->newObject();
+}
+
 void ScriptEngine::run()
 {
     QJSValue jsPaths = _jsEngine->newArray(_paths.size());
@@ -73,7 +79,11 @@ void ScriptEngine::run()
 
     QFile scriptFile(_scriptPath);
     if(!scriptFile.open(QIODevice::ReadOnly))
+    {
+        emit newMessage("Failed to open " + _scriptPath, true);
+        emit finished();
         return;
+    }
 
     QTextStream stream(&scriptFile);
     QString contents = stream.readAll();
@@ -226,6 +236,26 @@ bool File::convertTo(const QString &format)
     return false;
 }
 
+QJSValue File::stats()
+{
+    if(_stats.isUndefined())
+    {
+        ImageInfoData info;
+        std::shared_ptr<RawImage> rawImage;
+        loadImage(_path, info, rawImage);
+        rawImage->calcStats();
+        RawImage::Stats stats = rawImage->imageStats();
+        _stats = _engine->newObject();
+        _stats.setProperty("mean", stats.m_mean[0]);
+        _stats.setProperty("stddev", stats.m_stdDev[0]);
+        _stats.setProperty("median", stats.m_median[0]);
+        _stats.setProperty("min", stats.m_min[0]);
+        _stats.setProperty("max", stats.m_max[0]);
+        _stats.setProperty("mad", stats.m_mean[0]);
+    }
+    return _stats;
+}
+
 ScriptEngineThread::ScriptEngineThread(QObject *parent) : QObject(parent)
 {
     _thread = new QThread();
@@ -236,6 +266,7 @@ ScriptEngineThread::ScriptEngineThread(QObject *parent) : QObject(parent)
     connect(_engine, &ScriptEngine::newMessage, this, &ScriptEngineThread::newMessage);
     connect(_thread, &QThread::started, _engine, &ScriptEngine::run);
     connect(_thread, &QThread::finished, _engine, &ScriptEngine::deleteLater);
+    connect(_engine, &ScriptEngine::destroyed, [this](){ _engine = nullptr; });
     connect(_thread, &QThread::finished, _thread, &QThread::deleteLater);
     connect(_thread, &QThread::finished, this, &ScriptEngineThread::finished);
 }