[Combat] Basic Combat Recording (#2090)

* Basic combat recording

* Update combat_record.h

zone/combat_record.h

@@ -0,0 +1,23 @@
+#ifndef EQEMU_COMBAT_RECORD_H
+#define EQEMU_COMBAT_RECORD_H
+
+#include <ctime>
+#include <string>
+#include "../common/types.h"
+
+class CombatRecord {
+public:
+	void Start(std::string in_mob_name);
+	void Stop();
+	bool InCombat();
+	void ProcessHPEvent(int hp, int current_hp);
+	double TimeInCombat() const;
+private:
+	std::string mob_name;
+	time_t      start_time      = 0;
+	time_t      end_time        = 0;
+	int64       damage_received = 0;
+	int64       heal_received   = 0;
+};
+
+#endif //EQEMU_COMBAT_RECORD_H