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#include <filesystem>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <map>
#include <sstream>
#include <stdexcept>
#include <string_view>
#include <variant>
#include "heading.h"
#include "scene.h"
Scene::Scene(const std::filesystem::path& path) {
std::ifstream input(path.c_str());
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(line);
if (heading.type() == "gd_scene") {
file_descriptor_ = heading;
} else if (heading.type() == "ext_resource") {
ext_resources_[std::get<int>(heading.GetKeyval("id"))] = heading;
} 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();
}
for (const auto& [id, stuff] : sub_resources_) {
if (id >= next_sub_id_) {
next_sub_id_ = id + 1;
}
}
}
int Scene::AddSubResource(const Script& script) {
int new_id = next_sub_id_++;
std::ostringstream resource_contents;
resource_contents << "script/source = " << std::quoted(script.ToString());
std::ostringstream variables_str;
for (const auto& [variable, value] : script.exports()) {
variables_str << variable << " = SubResource( " << value << " )"
<< std::endl;
}
Heading heading;
heading.set_type("sub_resource");
heading.SetKeyval("type", "GDScript");
heading.SetKeyval("id", new_id);
sub_resources_[new_id] = {heading, resource_contents.str(),
variables_str.str()};
return new_id;
}
void Scene::RemoveExtResource(int id) { ext_resources_.erase(id); }
void Scene::ReplaceScriptReferences(int ext_id, int sub_id) {
auto replace_refs = [&](std::string& text) {
std::ostringstream search_str;
search_str << "ExtResource( " << ext_id << " )";
std::string search = search_str.str();
bool found_it = false;
std::ostringstream new_text;
std::string_view corpus = text;
int location;
while ((location = corpus.find(search)) != std::string_view::npos) {
new_text << corpus.substr(0, location) << "SubResource( " << sub_id
<< " )";
corpus.remove_prefix(location + search.size());
found_it = true;
}
new_text << corpus;
if (found_it) {
const std::string& variables = std::get<2>(sub_resources_[sub_id]);
new_text << std::endl << variables;
}
text = new_text.str();
};
for (auto& [id, stuff] : sub_resources_) {
auto& [heading, text, variables] = stuff;
replace_refs(text);
}
for (auto& [heading, text] : other_) {
replace_refs(text);
}
}
std::string Scene::ToString() const {
std::ostringstream output;
output << file_descriptor_.ToString() << std::endl;
for (const auto& [id, heading] : ext_resources_) {
output << heading.ToString();
}
output << std::endl;
for (const auto& [id, resource] : sub_resources_) {
const auto& [heading, value, variables] = resource;
output << heading.ToString() << value << std::endl << std::endl;
}
for (const auto& [heading, value] : other_) {
output << heading.ToString() << value << std::endl << std::endl;
}
return output.str();
}
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