gamestate: Make a lookup function for next comand switching.

Author: heinezen

libopenage/gamestate/activity/condition/CMakeLists.txt

@@ -1,4 +1,5 @@
 add_sources(libopenage
     command_in_queue.cpp
+    next_command_switch.cpp
     next_command.cpp
 )

libopenage/gamestate/activity/condition/next_command_switch.cpp

@@ -0,0 +1,25 @@
+// Copyright 2024-2024 the openage authors. See copying.md for legal info.
+
+#include "next_command_switch.h"
+
+#include "gamestate/component/internal/command_queue.h"
+#include "gamestate/game_entity.h"
+
+
+namespace openage::gamestate::activity {
+
+int next_command_switch(const time::time_t &time,
+                        const std::shared_ptr<gamestate::GameEntity> &entity) {
+	auto command_queue = std::dynamic_pointer_cast<component::CommandQueue>(
+		entity->get_component(component::component_t::COMMANDQUEUE));
+
+	if (command_queue->get_queue().empty(time)) {
+		return -1;
+	}
+
+	auto command = command_queue->get_queue().front(time);
+
+	return static_cast<int>(command->get_type());
+}
+
+} // namespace openage::gamestate::activity

libopenage/gamestate/activity/condition/next_command_switch.h

@@ -0,0 +1,23 @@
+// Copyright 2024-2024 the openage authors. See copying.md for legal info.
+
+#pragma once
+
+#include <cstddef>
+#include <memory>
+
+#include "time/time.h"
+
+
+namespace openage::gamestate {
+class GameEntity;
+
+namespace activity {
+
+/**
+ * Returns true if the next command in the queue is an idle command.
+ */
+int next_command_switch(const time::time_t &time,
+                        const std::shared_ptr<gamestate::GameEntity> &entity);
+
+} // namespace activity
+} // namespace openage::gamestate