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#include "godot_scene.h"
#include <absl/strings/str_split.h>
#include <fstream>
#include <sstream>
#include <variant>
namespace com::fourisland::lingo2_archipelago {
namespace {
class GodotSceneImpl : public GodotScene {
public:
GodotSceneImpl(std::map<std::string, GodotExtResource> ext_resources,
std::unique_ptr<GodotNode> root,
std::vector<std::unique_ptr<GodotNode>> descendents)
: ext_resources_(std::move(ext_resources)),
root_(std::move(root)),
descendents_(std::move(descendents)) {}
virtual const GodotExtResource* GetExtResource(const std::string& id) const {
auto it = ext_resources_.find(id);
if (it != ext_resources_.end()) {
return &it->second;
} else {
return nullptr;
}
}
virtual const GodotNode& GetRoot() const { return *root_; }
private:
std::map<std::string, GodotExtResource> ext_resources_;
std::unique_ptr<GodotNode> root_;
std::vector<std::unique_ptr<GodotNode>> descendents_;
};
struct Heading {
std::string type;
std::string id;
std::string path;
std::string resource_type;
std::string name;
std::string parent;
GodotInstanceType instance_type;
};
Heading ParseTscnHeading(absl::string_view line) {
std::string original_line(line);
Heading heading;
if (line[0] != '[') {
std::ostringstream errormsg;
errormsg << "Heading must start with [." << std::endl
<< "Bad heading: " << original_line;
throw std::invalid_argument(errormsg.str());
}
line.remove_prefix(1);
int divider = line.find_first_of(" ]");
if (divider == std::string_view::npos) {
std::ostringstream errormsg;
errormsg << "Malformatted heading: " << line << std::endl
<< "Original line: " << original_line;
throw std::invalid_argument(errormsg.str());
}
heading.type = std::string(line.substr(0, divider));
line.remove_prefix(divider + 1);
while (!line.empty()) {
divider = line.find_first_of("=");
if (divider == std::string_view::npos) {
std::ostringstream errormsg;
errormsg << "Malformatted heading: " << line << std::endl
<< "Original line: " << original_line;
throw std::invalid_argument(errormsg.str());
}
std::string key(line.substr(0, divider));
line.remove_prefix(divider + 1);
if (line[0] == '"') {
line.remove_prefix(1);
divider = line.find_first_of("\"");
if (divider == std::string_view::npos) {
std::ostringstream errormsg;
errormsg << "Malformatted heading: " << line << std::endl
<< "Original line: " << original_line;
throw std::invalid_argument(errormsg.str());
}
std::string strval(line.substr(0, divider));
line.remove_prefix(divider + 2);
if (key == "name") {
heading.name = strval;
} else if (key == "parent") {
heading.parent = strval;
} else if (key == "path") {
heading.path = strval;
} else if (key == "type") {
heading.resource_type = strval;
} else if (key == "id") {
heading.id = strval;
}
} else if (line[0] == 'S' || line[0] == 'E') {
GodotInstanceType rrval;
char internal = line[0];
line.remove_prefix(13); // SubResource("
divider = line.find_first_of("\"");
if (divider == std::string_view::npos) {
std::ostringstream errormsg;
errormsg << "Malformatted heading: " << line << std::endl
<< "Original line: " << original_line;
throw std::invalid_argument(errormsg.str());
}
std::string refid = std::string(line.substr(0, divider));
line.remove_prefix(divider + 3);
GodotInstanceType instance_type;
if (internal == 'E') {
instance_type = GodotExtResourceRef{.id = refid};
} else {
// SubResource is not supported right now.
}
if (key == "instance") {
heading.instance_type = instance_type;
} else {
// Other keys aren't supported right now.
}
} else {
divider = line.find_first_of(" ]");
if (divider == std::string_view::npos) {
std::ostringstream errormsg;
errormsg << "Malformatted heading: " << line << std::endl
<< "Original line: " << original_line;
throw std::invalid_argument(errormsg.str());
}
int numval = std::atoi(line.substr(0, divider).data());
line.remove_prefix(divider + 1);
// keyvals_[key] = numval;
}
}
return heading;
}
} // namespace
void GodotNode::AddChild(GodotNode& child) {
children_[child.GetName()] = &child;
child.parent_ = this;
}
std::string GodotNode::GetPath() const {
if (parent_ == nullptr || parent_->GetName() == "") {
return name_;
} else {
return parent_->GetPath() + "/" + name_;
}
}
const GodotNode* GodotNode::GetNode(absl::string_view path) const {
std::vector<std::string> names = absl::StrSplit(path, "/");
auto it = children_.find(names[0]);
if (it == children_.end()) {
return nullptr;
} else {
if (names.size() == 1) {
return it->second;
} else {
path.remove_prefix(names[0].size() + 1);
return it->second->GetNode(path);
}
}
}
GodotNode* GodotNode::GetNode(absl::string_view path) {
return const_cast<GodotNode*>(
const_cast<const GodotNode*>(this)->GetNode(path));
}
std::unique_ptr<GodotScene> ReadGodotSceneFromFile(const std::string& path) {
std::map<std::string, GodotExtResource> ext_resources;
auto root = std::make_unique<GodotNode>("", GodotInstanceType{});
std::vector<std::unique_ptr<GodotNode>> descendents;
std::ifstream input(path);
std::string line;
bool section_started = false;
Heading cur_heading;
std::ostringstream cur_value;
bool value_started = false;
auto handle_end_of_section = [&]() {
section_started = false;
value_started = false;
if (cur_heading.type == "sub_resource") {
// sub_resources_[std::get<int>(cur_heading.GetKeyval("id"))] =
// {cur_heading, cur_value.str(), ""};
} else {
// other_.emplace_back(cur_heading, cur_value.str());
}
cur_value = {};
};
while (std::getline(input, line)) {
if (section_started && (line.empty() || line[0] == '[')) {
handle_end_of_section();
}
if (!line.empty() && line[0] == '[') {
Heading heading = ParseTscnHeading(line);
if (heading.type == "gd_scene") {
// file_descriptor_ = heading;
} else if (heading.type == "ext_resource") {
GodotExtResource ext_resource;
ext_resource.path = heading.path;
ext_resource.type = heading.resource_type;
ext_resources[heading.id] = ext_resource;
} else if (heading.type == "node") {
if (heading.parent != "") {
descendents.push_back(
std::make_unique<GodotNode>(heading.name, heading.instance_type));
GodotNode* child = descendents.back().get();
if (heading.parent == ".") {
root->AddChild(*child);
} else {
root->GetNode(heading.parent)->AddChild(*child);
}
}
} else {
cur_heading = heading;
section_started = true;
}
} else if (!line.empty()) {
if (value_started) {
cur_value << std::endl;
} else {
value_started = true;
}
cur_value << line;
}
}
if (section_started) {
handle_end_of_section();
}
return std::make_unique<GodotSceneImpl>(
std::move(ext_resources), std::move(root), std::move(descendents));
}
} // namespace com::fourisland::lingo2_archipelago
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