basic file format

src/mainwindow.cc

@@ -1,7 +1,10 @@
 #include "mainwindow.h"
+#include "common.h"
 #include <QDebug>
 #include <QFileDialog>
+#include <QTreeWidgetItem>
 #include <fstream>
+#include <iostream>
 
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent), ui(new Ui::MainWindow) {
@@ -15,7 +18,65 @@ MainWindow::MainWindow(QWidget *parent)
       return;
     }
 
-    std::ofstream file(path.toStdString(), std::ios::binary);
-    file.write("TEST", 4);
+    {
+      std::ofstream file(path.toStdString(), std::ios::binary);
+      file.write("DULL", 4);
+
+      std::string file_name = "hello.txt";
+      u64 file_name_size = file_name.size();
+      std::string file_content = "Hello, World!";
+      u64 file_size = file_content.size();
+      file.write(reinterpret_cast<const char *>(&file_name_size), sizeof(u64));
+      file.write(file_name.data(), static_cast<i64>(file_name_size));
+      file.write(reinterpret_cast<const char *>(&file_size), sizeof(u64));
+      file.write(file_content.data(), static_cast<i64>(file_size));
+    }
+
+    m_vault_path = path;
+    reload_vault();
+  });
+
+  connect(ui->actionOpen, &QAction::triggered, this, [this]() {
+    QString path = QFileDialog::getOpenFileName(this, "Choose vault to open",
+                                                QDir::currentPath(),
+                                                "Dull Vaults (*.dull)");
+    if (path.isEmpty()) {
+      return;
+    }
+
+    m_vault_path = path;
+    reload_vault();
   });
 }
+
+void MainWindow::reload_vault() {
+  ui->fsTreeWidget->clear();
+
+  std::ifstream file(m_vault_path.toStdString(), std::ios::binary);
+  ASSERT(file.good());
+
+  std::array<i8, 4> header{};
+  ASSERT(file.read(header.data(), header.size()));
+
+  ASSERT(std::string_view(reinterpret_cast<i8 *>(header.data()),
+                          header.size()) == "DULL");
+
+  while (true) {
+    u64 name_size = 0;
+    if (!file.read(reinterpret_cast<char *>(&name_size), sizeof(u64))) {
+      break;
+    }
+
+    std::string name(name_size, '\0');
+    file.read(name.data(), static_cast<i64>(name_size));
+
+    u64 content_size = 0;
+    file.read(reinterpret_cast<char *>(&content_size), sizeof(u64));
+
+    std::string content(content_size, '\0');
+    file.read(content.data(), static_cast<i64>(content_size));
+
+    auto *item = new QTreeWidgetItem(ui->fsTreeWidget);
+    item->setText(0, QString::fromStdString(name));
+  }
+}