From 1d86d24ed14822d0e78d90e8043a52a36c8527dc Mon Sep 17 00:00:00 2001
From: Toni <antpiasecki@gmail.com>
Date: Sun, 2 Nov 2025 16:15:12 +0100
Subject: [PATCH] basic file format

---
 .clang-tidy       |  2 +-
 src/common.h      | 21 +++++++++++++++
 src/mainwindow.cc | 65 +++++++++++++++++++++++++++++++++++++++++++++--
 src/mainwindow.h  |  4 +++
 src/mainwindow.ui |  6 +++++
 5 files changed, 95 insertions(+), 3 deletions(-)
 create mode 100644 src/common.h

diff --git a/.clang-tidy b/.clang-tidy
index 3cda293..2445ece 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -1 +1 @@
-Checks: '*,clang-analyzer-*,-llvmlibc-*,-fuchsia-*,-altera-*,-abseil-*,-android-*,-modernize-use-trailing-return-type,-readability-identifier-length,-*-readability-todo,-*-magic-numbers,-readability-function-cognitive-complexity,-*-easily-swappable-parameters'
\ No newline at end of file
+Checks: '*,clang-analyzer-*,-llvmlibc-*,-fuchsia-*,-altera-*,-abseil-*,-android-*,-modernize-use-trailing-return-type,-readability-identifier-length,-*-readability-todo,-*-magic-numbers,-readability-function-cognitive-complexity,-*-easily-swappable-parameters,-*-pro-type-reinterpret-cast,-*-owning-memory'
\ No newline at end of file
diff --git a/src/common.h b/src/common.h
new file mode 100644
index 0000000..7fa147a
--- /dev/null
+++ b/src/common.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <cstdint>
+
+#define ASSERT(cond)                                                           \
+  if (!(cond)) {                                                               \
+    std::cerr << "ASSERTION FAILED at " << __FILE__ << ":" << __LINE__ << "\n" \
+              << #cond << std::endl;                                           \
+    abort();                                                                   \
+  }
+
+using u8 = unsigned char;
+using i8 = char;
+using i32 = int32_t;
+using u32 = uint32_t;
+using i64 = int64_t;
+using u64 = uint64_t;
+static_assert(sizeof(float) * 8 == 32);
+using f32 = float;
+static_assert(sizeof(double) * 8 == 64);
+using f64 = double;
\ No newline at end of file
diff --git a/src/mainwindow.cc b/src/mainwindow.cc
index 30b7dc0..54eaaca 100644
--- a/src/mainwindow.cc
+++ b/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));
+  }
+}
diff --git a/src/mainwindow.h b/src/mainwindow.h
index eb858d3..c3cf4ec 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -11,4 +11,8 @@ public:
 
 private:
   Ui::MainWindow *ui;
+
+  QString m_vault_path;
+
+  void reload_vault();
 };
diff --git a/src/mainwindow.ui b/src/mainwindow.ui
index 1acf7e6..20d0e8c 100644
--- a/src/mainwindow.ui
+++ b/src/mainwindow.ui
@@ -28,6 +28,7 @@
      <string>Vault</string>
     </property>
     <addaction name="actionNew"/>
+    <addaction name="actionOpen"/>
    </widget>
    <addaction name="menuFile"/>
   </widget>
@@ -36,6 +37,11 @@
     <string>New</string>
    </property>
   </action>
+  <action name="actionOpen">
+   <property name="text">
+    <string>Open</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections/>