NOISSUE refactor *Download into more, smaller pieces

* Download is now Download.
* Download uses Sink subclasses to process various events.
* Validators can be used to further customize the Sink behaviour.

api/logic/net/ByteArraySink.h

@@ -0,0 +1,57 @@
+#pragma once
+
+#include "Sink.h"
+
+namespace Net {
+/*
+ * Sink object for downloads that uses an external QByteArray it doesn't own as a target.
+ */
+class ByteArraySink : public Sink
+{
+public:
+	ByteArraySink(QByteArray *output)
+		:m_output(output)
+	{
+		// nil
+	};
+
+	virtual ~ByteArraySink()
+	{
+		// nil
+	}
+
+public:
+	JobStatus init(QNetworkRequest & request) override
+	{
+		m_output->clear();
+		if(initAllValidators(request))
+			return Job_InProgress;
+		return Job_Failed;
+	};
+
+	JobStatus write(QByteArray & data) override
+	{
+		m_output->append(data);
+		if(writeAllValidators(data))
+			return Job_InProgress;
+		return Job_Failed;
+	}
+
+	JobStatus abort() override
+	{
+		m_output->clear();
+		failAllValidators();
+		return Job_Failed;
+	}
+
+	JobStatus finalize(QNetworkReply &reply) override
+	{
+		if(finalizeAllValidators(reply))
+			return Job_Finished;
+		return Job_Failed;
+	}
+
+private:
+	QByteArray * m_output;
+};
+}