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#include "Level.hpp"
#include "AppConfig.hpp"
#include "PodVector.hpp"
#include "RapidJsonHelper.hpp"
#include "ScopeGuard.hpp"
#include "Utils.hpp"
#include <rapidjson/document.h>
#include <rapidjson/filereadstream.h>
#include <rapidjson/filewritestream.h>
#include <rapidjson/writer.h>
#include <cstdio>
#include <filesystem>
using namespace std::literals;
namespace fs = std::filesystem;
constexpr auto kInvalidEntryId = std::numeric_limits<size_t>::max();
struct Level::InstanciationEntry {
// If set to std::numeric_limits<size_t>::max(), this object is parented to the "root" provided when instanciating
size_t parentId;
rapidjson::Document data;
};
Level::Level() = default;
Level::~Level() = default;
void Level::Instanciate(GameObject* relRoot) const {
}
void LevelManager::DiscoverFilesDesignatedLocation() {
auto path = AppConfig::assetDirPath / "Levels";
DiscoverFiles(path);
}
void LevelManager::DiscoverFiles(const std::filesystem::path& dir) {
for (auto& item : fs::directory_iterator(dir)) {
auto& path = item.path();
if (!item.is_regular_file()) {
continue;
}
if (path.extension() != ".json") {
continue;
}
// Parse uid from filename, map key
Uid uid;
uid.ReadString(path.filename().string());
// Map value
LoadableObject obj;
obj.filePath = path;
mObjByUid.try_emplace(uid, std::move(obj));
}
}
Level* LevelManager::FindLevel(const Uid& uid) const {
auto iter = mObjByUid.find(uid);
if (iter != mObjByUid.end()) {
return iter->second.level.Get();
} else {
return nullptr;
}
}
#define BRUSSEL_DEF_LEVEL_NAME "New Level"
#define BRUSSEL_DEF_LEVEL_DESC "No description."
Level* LevelManager::LoadLevel(const Uid& uid) {
auto iter = mObjByUid.find(uid);
if (iter != mObjByUid.end()) {
auto& ldObj = iter->second;
if (ldObj.level != nullptr) {
auto file = Utils::OpenCstdioFile(ldObj.filePath, Utils::Read, false);
if (!file) {
fprintf(stderr, "Cannot open file level file %s that was discovered on game startup.", ldObj.filePath.string().c_str());
return nullptr;
}
DEFER { fclose(file); };
char readerBuffer[65536];
rapidjson::FileReadStream stream(file, readerBuffer, sizeof(readerBuffer));
rapidjson::Document root;
root.ParseStream(stream);
Level* level;
ldObj.level.Attach(level = new Level());
level->mMan = this;
#if defined(BRUSSEL_DEV_ENV)
BRUSSEL_JSON_GET_DEFAULT(root, "Name", std::string, ldObj.name, BRUSSEL_DEF_LEVEL_NAME);
BRUSSEL_JSON_GET_DEFAULT(root, "Description", std::string, ldObj.description, BRUSSEL_DEF_LEVEL_DESC)
#endif
auto rvEntries = rapidjson::GetProperty(root, rapidjson::kArrayType, "DataEntries"sv);
if (!rvEntries) return nullptr;
for (auto iter = rvEntries->Begin(); iter != rvEntries->End(); ++iter) {
Level::InstanciationEntry entry;
BRUSSEL_JSON_GET_DEFAULT(*iter, "ParentId", int, entry.parentId, kInvalidEntryId);
auto rvDataEntry = rapidjson::GetProperty(*iter, "Data"sv);
if (!rvDataEntry) return nullptr;
entry.data.CopyFrom(*iter, entry.data.GetAllocator());
level->mEntries.push_back(std::move(entry));
}
}
return ldObj.level.Get();
} else {
return nullptr;
}
}
void LevelManager::PrepareLevel(const Uid& uid) {
// TODO
}
LevelManager::LoadableObject& LevelManager::AddLevel(const Uid& uid) {
auto&& [iter, inserted] = mObjByUid.try_emplace(uid, LoadableObject{});
auto& ldObj = iter->second;
#if defined(BRUSSEL_DEV_ENV)
ldObj.name = BRUSSEL_DEF_LEVEL_NAME;
ldObj.description = BRUSSEL_DEF_LEVEL_DESC;
#endif
return ldObj;
}
LevelWrapperObject::LevelWrapperObject(GameWorld* world)
: GameObject(KD_LevelWrapper, world) //
{
mStopFreePropagation = true;
}
LevelWrapperObject::~LevelWrapperObject() {
// Destruction/freeing of this object is handled by our parent
for (auto child : GetChildren()) {
FreeRecursive(child);
}
}
void LevelWrapperObject::SetBoundLevel(Level* level) {
if (mLevel != level) {
mLevel.Attach(level);
// Cleanup old children
// TODO needs to Resleep()?
auto children = RemoveAllChildren();
for (auto child : children) {
FreeRecursive(child);
}
}
level->Instanciate(this);
PodVector<GameObject*> stack;
stack.push_back(this);
while (!stack.empty()) {
auto obj = stack.back();
stack.pop_back();
for (auto child : obj->GetChildren()) {
stack.push_back(child);
}
obj->Awaken();
}
}
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