From d9f829f10a8310f53d945cd96ecce28193b792d8 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Fri, 26 Sep 2014 01:42:49 +0200
Subject: Add support for interactions with entities

---
 src/control/MapContext.cpp | 13 +++++++++++++
 src/control/MapContext.hpp |  1 +
 src/model/Entity.hpp       |  4 ++++
 src/model/Map.hpp          | 12 ++++++++++++
 4 files changed, 30 insertions(+)

diff --git a/src/control/MapContext.cpp b/src/control/MapContext.cpp
index f5d4c05..1b0e721 100644
--- a/src/control/MapContext.cpp
+++ b/src/control/MapContext.cpp
@@ -71,6 +71,15 @@ void MapContext::movePlayerContinue(uint64_t time) {
 		movePlayer(Model::Direction::WEST, time);
 }
 
+void MapContext::interact(uint64_t time) {
+	Model::Position<int> p = map.getEntityPosition(playerEntity) + playerEntity->getDirection();
+	Model::Entity *target = map.getEntityAt(p);
+
+	if (!target)
+		return;
+
+	target->interact(time);
+}
 
 void MapContext::keyPressed(uint16_t key, uint64_t time) {
 	switch (key) {
@@ -88,6 +97,10 @@ void MapContext::keyPressed(uint16_t key, uint64_t time) {
 
 	case SDL_SCANCODE_LEFT:
 		movePlayer(Model::Direction::WEST, time);
+		break;
+
+	case SDL_SCANCODE_SPACE:
+		interact(time);
 	}
 }
 
diff --git a/src/control/MapContext.hpp b/src/control/MapContext.hpp
index 05ed991..18d4cfe 100644
--- a/src/control/MapContext.hpp
+++ b/src/control/MapContext.hpp
@@ -52,6 +52,7 @@ private:
 	void movePlayer(Model::Direction dir, uint64_t time);
 	void movePlayerContinue(uint64_t time);
 	void keyPressed(uint16_t key, uint64_t time);
+	void interact(uint64_t time);
 
 	Model::Position<float> getViewPosition(uint64_t time) {
 		return map.getEntityPosition(playerEntity, time);
diff --git a/src/model/Entity.hpp b/src/model/Entity.hpp
index 331cb4f..677eeb5 100644
--- a/src/model/Entity.hpp
+++ b/src/model/Entity.hpp
@@ -61,6 +61,10 @@ public:
 	void setDirection(Direction dir) {
 		direction = dir;
 	}
+
+	void interact(uint64_t time) {
+		std::fprintf(stderr, "Tried to interact with `%s' entity at %llu\n", name.c_str(), (unsigned long long)time);
+	}
 };
 
 }
diff --git a/src/model/Map.hpp b/src/model/Map.hpp
index 0343709..acf93b1 100644
--- a/src/model/Map.hpp
+++ b/src/model/Map.hpp
@@ -223,6 +223,18 @@ public:
 		return tiles[layer][p.y*width + p.x];
 	}
 
+	Entity * getEntityAt(const Position<int> &p) {
+		auto it = positions.find(p);
+		if (it == positions.end())
+			return nullptr;
+
+		return *it->second.begin();
+	}
+
+	Position<int> getEntityPosition(const Entity *entity) const {
+		return entityStates.at(entity).position;
+	}
+
 	Position<float> getEntityPosition(const Entity *entity, uint64_t time) const;
 	bool moveEntity(Entity *entity, Direction dir, uint64_t start, uint64_t end);
 	void moveEntityTo(Entity *entity, Position<int> pos);
-- 
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