paterns_menu: load patern from the selected file

includes/paterns_menu.hpp

@@ -25,7 +25,7 @@ public:
   void display();
   void refresh();
 private:
-  void loadPatern(std::string &path);
+  bool loadPatern(std::string &path);
   bool is_open_ = false;
   std::shared_ptr<ctx> context_ = nullptr;
   std::map<std::string,std::string> paterns_paths_list_;

src/paterns_menu.cpp

@@ -6,34 +6,34 @@
 * ------
 */
 
-#include <paterns_menu.hpp>
-
-#include <filesystem>
-#include <iostream>
-
 #include <imgui.h>
 #include <raylib.h>
 #include <rlImGui.h>
 
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <paterns_menu.hpp>
+#include <sstream>
+
 namespace gol {
 
-PaternsMenu::PaternsMenu(std::shared_ptr<ctx> ctx): context_(ctx) {} 
+PaternsMenu::PaternsMenu(std::shared_ptr<ctx> ctx) : context_(ctx) {}
 
-void PaternsMenu::Toogle() {
-  is_open_ = !is_open_;
-}
+void PaternsMenu::Toogle() { is_open_ = !is_open_; }
 
-bool PaternsMenu::isOpen() {
-  return is_open_;
-}
+bool PaternsMenu::isOpen() { return is_open_; }
 
 void PaternsMenu::refresh() {
   paterns_name_list_.clear();
   paterns_paths_list_.clear();
   auto paterns_path = context_->program_dir / "paterns";
-  if (std::filesystem::exists(paterns_path) && std::filesystem::is_directory(paterns_path)) {
-    for (const auto& entry : std::filesystem::directory_iterator(paterns_path)) {
-      if (!std::filesystem::is_directory(entry) && entry.path().has_filename()) {
+  if (std::filesystem::exists(paterns_path) &&
+      std::filesystem::is_directory(paterns_path)) {
+    for (const auto &entry :
+         std::filesystem::directory_iterator(paterns_path)) {
+      if (!std::filesystem::is_directory(entry) &&
+          entry.path().has_filename()) {
         paterns_paths_list_[entry.path().filename()] = entry.path();
         paterns_name_list_.push_back(entry.path().filename());
       }
@@ -41,19 +41,45 @@ void PaternsMenu::refresh() {
   }
 }
 
-void PaternsMenu::loadPatern(std::string &path) {
-
+bool PaternsMenu::loadPatern(std::string &path) {
+  std::ifstream file(path);
+  std::string file_data;
+  if (!file.is_open()) {
+    std::cerr << "Failure in opening patern : " << path << std::endl;
+    return false;
+  }
+  loaded_patern_.clear();
+  try {
+    std::getline(file, file_data);
+    std::stringstream ss(file_data);
+    std::string width, height, data;
+    std::getline(ss, width, '|');
+    std::getline(ss, height, '|');
+    std::getline(ss, data, '|');
+    patern_width_ = std::stoi(width);
+    patern_height_ = std::stoi(height);
+    for (int i = 0; i < patern_width_ * patern_height_; i++) {
+      loaded_patern_.push_back((data[i] == '1') ? 1 : 0);
+    }
+  } catch (std::exception &e) {
+    std::cerr << "Failure in loading patern : " << path << std::endl;
+    return 1;
+  }
+  return true;
 }
 
 void PaternsMenu::display() {
   if (is_open_) {
-    ImGuiWindowFlags paterns_flags = ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoResize;
+    ImGuiWindowFlags paterns_flags =
+        ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoResize;
     ImGui::SetNextWindowSize(ImVec2(200, 250), ImGuiCond_Always);
     ImGui::Begin("paterns", &is_open_, paterns_flags);
-    for (auto patern_name: paterns_name_list_) {
+    for (auto patern_name : paterns_name_list_) {
       ImGui::PushID(patern_name.c_str());
-      if (ImGui::Button(patern_name.c_str())) {
-        loadPatern(paterns_paths_list_[patern_name]);
+      if (ImGui::Button(patern_name.c_str()) &&
+          loadPatern(paterns_paths_list_[patern_name])) {
+        // TODO: If patern is loaded successfuly, start the preview in the
+        // editor
       }
       ImGui::PopID();
       ImGui::SameLine(ImGui::GetWindowWidth() - 57.);