diff -r aa7dc7faf1bb -r 358a601bfe81 Message.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Message.h	Sun May 11 00:30:03 2025 +0200
@@ -0,0 +1,88 @@
+/**
+ * djm-fix
+ * Copyright © 2025 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <vector>
+#include <string>
+#include <ostream>
+
+enum class MessageType : uint8_t {
+	/** device sends: greeting message */
+	D11_GREETING = 0x11,
+
+	/** host sends: seed1 */
+	H12_SEED1 = 0x12,
+
+	/** device sends: hash1 and seed2 */
+	D13_HASH1_SEED2 = 0x13,
+
+	/** host sends: hash2 */
+	H14_HASH2 = 0x14,
+
+	/** device sends: confirmation of successful handshake */
+	D15_CONFIRMATION = 0x15,
+};
+
+enum class FieldType : uint8_t {
+	/** manufacturer name */
+	F01 = 0x01,
+	/** product name */
+	F02 = 0x02,
+	/** seed1 from host | seed2 from device */
+	F03 = 0x03,
+	/** hash2 from host | hash1 from device */
+	F04 = 0x04,
+	/** seed3 from device */
+	F05 = 0x05,
+};
+
+class Field {
+public:
+	FieldType type;
+	std::vector<uint8_t> data;
+
+	Field(FieldType type, std::vector<uint8_t> data) : type(type), data(data) {
+	}
+
+	virtual ~Field() = default;
+};
+
+/**
+ * Object representation of a raw MIDI message.
+ * Is either a result of parsing a raw message by MessageCodec, or constructed
+ * in the application to be serialized in MessageCodec to a raw message.
+ */
+class Message {
+public:
+	MessageType type;
+	/** 0x17 for DJM-250MK2 and 0x34 for V10 (maybe not a version) */
+	uint8_t version;
+	std::vector<Field> fields;
+
+	Message(MessageType type, uint8_t version, std::vector<Field> fields) :
+			type(type), version(version), fields(fields) {
+	}
+
+	virtual ~Message() = default;
+
+	std::string toString() const;
+
+	std::vector<Field> findFields(FieldType type);
+
+};