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#include "MapObserver.h"
#include "inode.h"
#include "ientity.h"
namespace gameconn
{
class EntityNodeCollector : public scene::NodeVisitor
{
public:
std::vector<IEntityNodePtr> foundEntities;
bool pre(const scene::INodePtr& node) override {
if (auto ptr = std::dynamic_pointer_cast<IEntityNode>(node))
{
// Ignore worldspawn entities
if (ptr->getEntity().isWorldspawn())
{
return false;
}
foundEntities.push_back(ptr);
return false;
}
return true;
}
};
static std::vector<IEntityNodePtr> getEntitiesInSubgraph(const scene::INodePtr& node)
{
EntityNodeCollector visitor;
if (node)
{
node->traverse(visitor);
}
return visitor.foundEntities;
}
class MapObserver_EntityObserver : public Entity::Observer {
MapObserver& _owner;
std::string _entityName;
bool _enabled = false;
public:
MapObserver_EntityObserver(MapObserver& owner) : _owner(owner) {}
void enable() {
_enabled = true;
}
virtual void onKeyInsert(const std::string& key, EntityKeyValue& value) override {
if (key == "name")
_entityName = value.get(); //happens when installing observer
if (_enabled)
_owner.entityUpdated(_entityName, DiffStatus::modified());
}
virtual void onKeyChange(const std::string& key, const std::string& val) override {
if (_enabled) {
if (key == "name") {
//renaming is equivalent to deleting old entity and adding new
_owner.entityUpdated(_entityName, DiffStatus::removed());
_owner.entityUpdated(val, DiffStatus::added());
}
else {
_owner.entityUpdated(_entityName, DiffStatus::modified());
}
}
}
virtual void onKeyErase(const std::string& key, EntityKeyValue& value) override {
if (_enabled)
_owner.entityUpdated(_entityName, DiffStatus::modified());
}
};
class MapObserver_SceneObserver : public scene::Graph::Observer {
MapObserver& _owner;
public:
MapObserver_SceneObserver(MapObserver& owner) : _owner(owner) {}
virtual void onSceneNodeInsert(const scene::INodePtr& node) override
{
if (node->isRoot()) return; // ignore the map root
auto entityNodes = getEntitiesInSubgraph(node);
for (const IEntityNodePtr& entNode : entityNodes)
_owner.entityUpdated(entNode->name(), DiffStatus::added());
_owner.enableEntityObservers(entityNodes);
}
virtual void onSceneNodeErase(const scene::INodePtr& node) override
{
if (node->isRoot()) return; // ignore the map root
auto entityNodes = getEntitiesInSubgraph(node);
_owner.disableEntityObservers(entityNodes);
for (const IEntityNodePtr& entNode : entityNodes)
_owner.entityUpdated(entNode->name(), DiffStatus::removed());
}
};
void MapObserver::enableEntityObservers(const std::vector<IEntityNodePtr>& entityNodes)
{
for (auto entNode : entityNodes)
{
if (_entityObservers.count(entNode.get()))
continue; //already tracked
auto* observer = new MapObserver_EntityObserver(*this);
entNode->getEntity().attachObserver(observer);
_entityObservers[entNode.get()] = observer;
observer->enable();
}
}
void MapObserver::disableEntityObservers(const std::vector<IEntityNodePtr>& entityNodes)
{
for (auto entNode : entityNodes)
{
if (!_entityObservers.count(entNode.get()))
continue; //not tracked
Entity::Observer* observer = _entityObservers[entNode.get()];
entNode->getEntity().detachObserver(observer);
delete observer;
_entityObservers.erase(entNode.get());
}
}
void MapObserver::setEnabled(bool enable) {
if (enable) {
auto entityNodes = getEntitiesInSubgraph(GlobalSceneGraph().root());
enableEntityObservers(entityNodes);
if (!_sceneObserver) {
_sceneObserver.reset(new MapObserver_SceneObserver(*this));
GlobalSceneGraph().addSceneObserver(_sceneObserver.get());
}
}
else {
if (_sceneObserver) {
GlobalSceneGraph().removeSceneObserver(_sceneObserver.get());
_sceneObserver.reset();
auto entityNodes = getEntitiesInSubgraph(GlobalSceneGraph().root());
disableEntityObservers(entityNodes);
}
assert(_entityObservers.empty());
_entityChanges.clear();
}
}
bool MapObserver::isEnabled() const {
return _sceneObserver != nullptr;
}
void MapObserver::clear() {
_entityChanges.clear();
}
MapObserver::~MapObserver() {
setEnabled(false);
}
void MapObserver::entityUpdated(const std::string& name, const DiffStatus& diff) {
DiffStatus& status = _entityChanges[name];
status = status.combine(diff);
}
const DiffEntityStatuses& MapObserver::getChanges() const {
return _entityChanges;
}
}
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