From 9e6555c0f3be53d65496b442c4a60c2592fe4f97 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Sun, 12 Feb 2023 00:26:12 +0100
Subject: Extracted system update functions out of sim BaseBattle

---
 sim/src/BaseBattle.cpp  | 35 ++++++++++++++++++-----------------
 sim/src/BaseBattle.h    |  3 ---
 sim/src/TeamManager.cpp | 14 ++++----------
 sim/src/TeamManager.h   |  6 +++---
 4 files changed, 25 insertions(+), 33 deletions(-)

diff --git a/sim/src/BaseBattle.cpp b/sim/src/BaseBattle.cpp
index e34af76..6182fec 100644
--- a/sim/src/BaseBattle.cpp
+++ b/sim/src/BaseBattle.cpp
@@ -25,7 +25,6 @@ namespace sim
 
 
 BaseBattle::BaseBattle(const campaign::Scenario& scenario) :
-	time {0.0},
 	_registry {},
 	spawner {scenario.last_team(), scenario.radius, 0.1}
 {
@@ -57,17 +56,19 @@ BaseBattle::dispatcher()
 }
 
 
+static void keep_at_range(engine::Context& ctx);
+static void kill_off_dead(engine::Context& ctx);
+
+
 void
 BaseBattle::update(engine::Context& ctx)
 {
-	time = ctx.clock.game;
 	pick_random_targets();
-	keep_at_range();
+	keep_at_range(ctx);
 	FloatingMovement::update(ctx);
 	TurretControl::update(ctx);
-	kill_off_dead();
-	manager.clear(_registry);  // registry supports on destructions events
-	manager.update(_dispatcher);
+	kill_off_dead(ctx);
+	manager.update(ctx);
 }
 
 
@@ -83,13 +84,13 @@ BaseBattle::pick_random_targets()
 
 
 void
-BaseBattle::keep_at_range()
+keep_at_range(engine::Context& ctx)
 {
-	auto view = _registry.view<Transform, AIState>();
+	auto view = ctx.registry.view<Transform, AIState>();
 	for (auto&& [entity, self, ai] : view.each()) {
-		if (!_registry.valid(ai.target))
+		if (!ctx.registry.valid(ai.target))
 			continue;
-		const auto target = _registry.get<Transform>(ai.target);
+		const auto target = ctx.registry.get<Transform>(ai.target);
 		const auto offset = target.position - self.position;
 		ai.destination = target.position - offset.normalized().scale(ai.keep_at_range);
 	}
@@ -97,18 +98,18 @@ BaseBattle::keep_at_range()
 
 
 void
-BaseBattle::kill_off_dead()
+kill_off_dead(engine::Context& ctx)
 {
-	auto view = _registry.view<HitPoints>();
+	auto view = ctx.registry.view<HitPoints>();
 	for (auto&& [entity, points] : view.each()) {
 		if (points.is_alive())
 			continue;
-		if (_registry.all_of<universe::UniqueIdentifier, Team>(entity)) {
-			const auto& [identifier, team] = _registry.get<universe::UniqueIdentifier, Team>(entity);
-			_dispatcher.trigger(stats::ShipLeft{time, identifier, team.id, true});
-			_dispatcher.trigger(Destroyed{entity});
+		if (ctx.registry.all_of<universe::UniqueIdentifier, Team>(entity)) {
+			const auto& [identifier, team] = ctx.registry.get<universe::UniqueIdentifier, Team>(entity);
+			ctx.dispatcher.trigger(stats::ShipLeft{ctx.clock.game, identifier, team.id, true});
+			ctx.dispatcher.trigger(Destroyed{entity});
 		}
-		_registry.destroy(entity);
+		ctx.registry.destroy(entity);
 	}
 }
 
diff --git a/sim/src/BaseBattle.h b/sim/src/BaseBattle.h
index d67f33e..7532dd8 100644
--- a/sim/src/BaseBattle.h
+++ b/sim/src/BaseBattle.h
@@ -25,14 +25,11 @@ public:
 	entt::dispatcher& dispatcher() override;
 	void update(engine::Context& ctx) override;
 private:
-	double time;
 	entt::registry _registry;
 	entt::dispatcher _dispatcher;
 	RandomSpawner spawner;
 	TeamManager manager;
 	void pick_random_targets();
-	void keep_at_range();
-	void kill_off_dead();
 };
 
 
diff --git a/sim/src/TeamManager.cpp b/sim/src/TeamManager.cpp
index d26ed67..0325c0c 100644
--- a/sim/src/TeamManager.cpp
+++ b/sim/src/TeamManager.cpp
@@ -6,8 +6,8 @@
 #include <utility>
 
 #include <entt/entity/registry.hpp>
-#include <entt/signal/dispatcher.hpp>
 
+#include <kurator/engine/Context.h>
 #include <kurator/sim/events.h>
 
 
@@ -58,21 +58,15 @@ TeamManager::random(const int exclude)
 
 
 void
-TeamManager::clear(entt::registry& registry)
+TeamManager::update(engine::Context& ctx)
 {
 	for (auto& members : teams) {
-		auto is_valid = [&registry](entt::entity entity){ return !registry.valid(entity); };
+		auto is_valid = [&](entt::entity entity){ return !ctx.registry.valid(entity); };
 		members.erase(std::remove_if(members.begin(), members.end(), is_valid), members.end());
 	}
-}
-
-
-void
-TeamManager::update(entt::dispatcher& dispatcher)
-{
 	const auto left = std::count_if(teams.begin(), teams.end(), [](const Team& team){ return team.size() > 0; });
 	if (left < 2)
-		dispatcher.trigger(End{});
+		ctx.dispatcher.trigger(End{});
 }
 
 
diff --git a/sim/src/TeamManager.h b/sim/src/TeamManager.h
index 502bed2..f7cf1f6 100644
--- a/sim/src/TeamManager.h
+++ b/sim/src/TeamManager.h
@@ -4,7 +4,8 @@
 #include <vector>
 
 #include <entt/entity/registry.hpp>
-#include <entt/signal/dispatcher.hpp>
+
+#include <kurator/engine/Context.h>
 
 
 namespace kurator
@@ -21,8 +22,7 @@ public:
 	void add(int team, entt::entity entity);
 	Team get(int team) const;
 	entt::entity random(int exclude);
-	void clear(entt::registry& registry);
-	void update(entt::dispatcher& dispatcher);
+	void update(engine::Context& ctx);
 private:
 	std::vector<Team> teams;
 	std::mt19937 generator;
-- 
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