94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
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/*
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* <Short Description>
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* Copyright (C) 2024 Brett Terpstra
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <loader.h>
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#include <blt/std/logging.h>
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#include <fstream>
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#include <istream>
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#include <random>
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#include <nlohmann/json.hpp>
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using json = nlohmann::json;
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template<typename T>
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T load_with_default(const json& data, std::string_view key, T def)
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{
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if (data.contains(key))
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return data[key].get<T>();
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return def;
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}
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std::optional<loader_t> loader_t::load_for(engine_t& engine, const blt::gfx::window_data& window_data, std::string_view path,
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std::optional<std::string_view> save_path)
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{
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auto& graph = engine.graph;
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static std::random_device dev;
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std::uniform_real_distribution pos_x_dist(0.0, static_cast<blt::f64>(window_data.width));
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std::uniform_real_distribution pos_y_dist(0.0, static_cast<blt::f64>(window_data.height));
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if (save_path && std::filesystem::exists(*save_path))
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path = *save_path;
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if (!std::filesystem::exists(path))
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{
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BLT_WARN("Unable to load graph file!");
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return {};
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}
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std::ifstream file{std::string(path)};
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json data = json::parse(file);
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loader_t loader;
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if (data.contains("textures"))
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{
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for (const auto& texture : data["textures"])
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{
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auto texture_path = texture["path"].get<std::string>();
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auto texture_key = load_with_default(texture, "name", texture_path);
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loader.textures.emplace_back(texture_key, texture_path);
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}
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}
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if (data.contains("nodes"))
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{
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graph.nodes.clear();
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for (const auto& node : data["nodes"])
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{
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auto x = static_cast<blt::f32>(load_with_default(node, "x", pos_x_dist(dev)));
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auto y = static_cast<blt::f32>(load_with_default(node, "y", pos_y_dist(dev)));
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auto size = static_cast<blt::f32>(load_with_default(node, "size", static_cast<f64>(conf::POINT_SIZE)));
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auto name = load_with_default<std::string>(node, "name", "unnamed");
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graph.names_to_node.insert({name, static_cast<blt::u64>(graph.nodes.size())});
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graph.nodes.emplace_back(blt::gfx::point2d_t{x, y, size});
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graph.nodes.back().name = std::move(name);
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}
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}
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if (data.contains("connections"))
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{
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graph.edges.clear();
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graph.connected_nodes.clear();
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}
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return loader;
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}
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void loader_t::save_for(engine_t& engine, const loader_t& loader, std::string_view path)
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{
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}
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