when there is only one player remaing, goes back

sources/System/EndCondition/EndConditionSystem.cpp

@@ -0,0 +1,21 @@
+
+#include "EndConditionSystem.hpp"
+#include <map>
+#include "Runner/Runner.hpp"
+
+namespace BBM {
+
+	EndConditionSystem::EndConditionSystem(WAL::Wal &wal)
+		: System(wal)
+	{}
+
+	void EndConditionSystem::onSelfUpdate()
+	{
+		unsigned int alivePlayersCount = 0;
+
+        for (auto & [_ , healthComponent]: this->_wal.getScene()->view<HealthComponent>())
+            alivePlayersCount += (healthComponent.getHealthPoint() != 0);
+        if (alivePlayersCount <= 1)
+            Runner::gameState.nextScene = Runner::gameState.MainMenuScene;
+	}
+}