feat: persist win count to disk

src/main.zig

@@ -28,6 +28,8 @@ const MENU_ITEMS = [_][]const u8{
     "Quit",
 };
 
+var app_data_dir: std.fs.Dir = undefined;
+var win_count_file: std.fs.File = undefined;
 var win_count: u32 = 0;
 var win_triggered: bool = false;
 
@@ -83,6 +85,22 @@ pub fn init(context: *seizer.Context) !void {
         .on_event = toggleMenu,
         .default_bindings = &.{.start},
     });
+
+    const app_data_dir_path = try std.fs.getAppDataDir(gpa, "seizer-solitaire");
+    defer gpa.free(app_data_dir_path);
+
+    app_data_dir = try std.fs.cwd().makeOpenPath(app_data_dir_path, .{});
+    win_count_file = try app_data_dir.createFile("win_count.bin", .{ .read = true, .truncate = false });
+
+    var win_count_buffer: [4]u8 = undefined;
+    const bytes_read = try win_count_file.preadAll(&win_count_buffer, 0);
+    if (bytes_read < win_count_buffer.len) {
+        win_count = 0;
+        std.mem.writeInt(u32, &win_count_buffer, win_count, .little);
+        try win_count_file.pwriteAll(&win_count_buffer, 0);
+    } else {
+        win_count = std.mem.readInt(u32, &win_count_buffer, .little);
+    }
 }
 
 fn resetGame() !void {
@@ -138,6 +156,11 @@ fn destroy(window: *seizer.Window) void {
 fn render(window: *seizer.Window) !void {
     if (haveWon() and !win_triggered) {
         win_count += 1;
+
+        var win_count_buffer: [4]u8 = undefined;
+        std.mem.writeInt(u32, &win_count_buffer, win_count, .little);
+        try win_count_file.pwriteAll(&win_count_buffer, 0);
+
         win_triggered = true;
     }