GH-1927 Add more specific task status logging

* Tasks are now described by class name and object name (or memory address).
* Tasks starts are logged.
* Aborted tasks are now treated just as the other cases.

api/logic/tasks/Task.cpp

@@ -41,31 +41,79 @@ void Task::start()
 {
 	m_running = true;
 	emit started();
+	qDebug() << "Task" << describe() << "started";
 	executeTask();
 }
 
 void Task::emitFailed(QString reason)
 {
+	// Don't fail twice.
+	if (!m_running)
+	{
+		qCritical() << "Task" << describe() << "failed while not running!!!!: " << reason;
+		return;
+	}
 	m_running = false;
 	m_finished = true;
 	m_succeeded = false;
 	m_failReason = reason;
-	qCritical() << "Task failed: " << reason;
+	qCritical() << "Task" << describe() << "failed: " << reason;
 	emit failed(reason);
 	emit finished();
 }
 
+void Task::emitAborted()
+{
+	// Don't abort twice.
+	if (!m_running)
+	{
+		qCritical() << "Task" << describe() << "aborted while not running!!!!";
+		return;
+	}
+	m_running = false;
+	m_finished = true;
+	m_succeeded = false;
+	m_failReason = "Aborted.";
+	qDebug() << "Task" << describe() << "aborted.";
+	emit failed(m_failReason);
+	emit finished();
+}
+
 void Task::emitSucceeded()
 {
-	if (!m_running) { return; } // Don't succeed twice.
+	// Don't succeed twice.
+	if (!m_running)
+	{
+		qCritical() << "Task" << describe() << "succeeded while not running!!!!";
+		return;
+	}
 	m_running = false;
 	m_finished = true;
 	m_succeeded = true;
-	qDebug() << "Task succeeded";
+	qDebug() << "Task" << describe() << "succeeded";
 	emit succeeded();
 	emit finished();
 }
 
+QString Task::describe()
+{
+	QString outStr;
+	QTextStream out(&outStr);
+	out << metaObject()->className() << QChar('(');
+	auto name = objectName();
+	if(name.isEmpty())
+	{
+		out << QString("0x%1").arg((quintptr)this, 0, 16);
+	}
+	else
+	{
+		out << name;
+	}
+	out << QChar(')');
+	out.flush();
+	return outStr;
+}
+
 bool Task::isRunning() const
 {
 	return m_running;

api/logic/tasks/Task.h

@@ -54,6 +54,9 @@ public:
 		return m_progressTotal;
 	}
 
+private:
+	QString describe();
+
 signals:
 	void started();
 	void progress(qint64 current, qint64 total);
@@ -71,6 +74,7 @@ protected:
 
 protected slots:
 	virtual void emitSucceeded();
+	virtual void emitAborted();
 	virtual void emitFailed(QString reason);
 
 public slots: