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.

1 files changed, 57 insertions, 0 deletions

diff --git a/api/logic/net/ChecksumValidator.h b/api/logic/net/ChecksumValidator.h
new file mode 100644
index 00000000..3cd25bc3
--- /dev/null
+++ b/api/logic/net/ChecksumValidator.h
@@ -0,0 +1,57 @@
+#pragma once
+
+#include "Validator.h"
+#include <QCryptographicHash>
+#include <memory>
+#include <QFile>
+
+namespace Net {
+class ChecksumValidator: public Validator
+{
+public: /* con/des */
+	ChecksumValidator(QCryptographicHash::Algorithm algorithm, QByteArray expected = QByteArray())
+		:m_checksum(algorithm), m_expected(expected)
+	{
+	};
+	virtual ~ChecksumValidator() {};
+
+public: /* methods */
+	bool init(QNetworkRequest &) override
+	{
+		m_checksum.reset();
+		return true;
+	}
+	bool write(QByteArray & data) override
+	{
+		m_checksum.addData(data);
+		this->data.append(data);
+		return true;
+	}
+	bool abort() override
+	{
+		return true;
+	}
+	bool validate(QNetworkReply &) override
+	{
+		if(m_expected.size() && m_expected != hash())
+		{
+			qWarning() << "Checksum mismatch, download is bad.";
+			return false;
+		}
+		return true;
+	}
+	QByteArray hash()
+	{
+		return m_checksum.result();
+	}
+	void setExpected(QByteArray expected)
+	{
+		m_expected = expected;
+	}
+
+private: /* data */
+	QByteArray data;
+	QCryptographicHash m_checksum;
+	QByteArray m_expected;
+};
+}
\ No newline at end of file