hopefully save the hand and also when the player leaves or server closes

src/Inventory.zig

@@ -310,14 +310,14 @@ pub const Sync = struct { // MARK: Sync
 						}
 					}
 				},
-				.playerInventory, .other => {},
+				.playerInventory, .hand, .other => {},
 				.alreadyFreed => unreachable,
 			}
 			const inventory = ServerInventory.init(len, typ, source);
 
 			switch (source) {
 				.sharedTestingInventory => {},
-				.playerInventory => {
+				.playerInventory, .hand => {
 					const dest: []u8 = main.stackAllocator.alloc(u8, std.base64.url_safe.Encoder.calcSize(user.name.len));
 					defer main.stackAllocator.free(dest);
 					const hashedName = std.base64.url_safe.Encoder.encode(dest, user.name);
@@ -328,7 +328,7 @@ pub const Sync = struct { // MARK: Sync
 					const playerData = main.files.readToZon(main.stackAllocator, path) catch .null;
 					defer playerData.deinit(main.stackAllocator);
 
-					const inventoryZon = playerData.getChild("inventory");
+					const inventoryZon = playerData.getChild(@tagName(source));
 
 					inventory.inv.loadFromZon(inventoryZon);
 				},
@@ -352,10 +352,10 @@ pub const Sync = struct { // MARK: Sync
 			return inventories.items[serverId].inv;
 		}
 
-		pub fn getInventoryFromSource(source: SourceType) ?Inventory {
+		pub fn getInventoryFromSource(source: Source) ?Inventory {
 			main.utils.assertLocked(&mutex);
 			for(inventories.items) |inv| {
-				if (inv.source == source) {
+				if (std.meta.eql(inv.source, source)) {
 					return inv.inv;
 				}
 			}
@@ -1059,8 +1059,14 @@ pub const Command = struct { // MARK: Command
 			std.mem.writeInt(usize, data.addMany(8)[0..8], self.inv._items.len, .big);
 			data.append(@intFromEnum(self.inv.type));
 			data.append(@intFromEnum(self.source));
+			switch (self.source) {
+				.playerInventory, .hand => |val| {
+					std.mem.writeInt(u32, data.addMany(4)[0..4], val, .big);
+				},
+				else => {}
+			}
 			switch(self.source) {
-				.playerInventory, .sharedTestingInventory, .other => {},
+				.playerInventory, .sharedTestingInventory, .hand, .other => {},
 				.alreadyFreed => unreachable,
 			}
 		}
@@ -1073,8 +1079,9 @@ pub const Command = struct { // MARK: Command
 			const typ: Inventory.Type = @enumFromInt(data[12]);
 			const sourceType: SourceType = @enumFromInt(data[13]);
 			const source: Source = switch(sourceType) {
-				.playerInventory => .{.playerInventory = {}},
+				.playerInventory => .{.playerInventory = std.mem.readInt(u32, data[14..18], .big)},
 				.sharedTestingInventory => .{.sharedTestingInventory = {}},
+				.hand => .{.hand = std.mem.readInt(u32, data[14..18], .big)},
 				.other => .{.other = {}},
 				.alreadyFreed => unreachable,
 			};
@@ -1647,12 +1654,14 @@ const SourceType = enum(u8) {
 	alreadyFreed = 0,
 	playerInventory = 1,
 	sharedTestingInventory = 2,
+	hand = 3,
 	other = 0xff, // TODO: List every type separately here.
 };
 const Source = union(SourceType) {
 	alreadyFreed: void,
-	playerInventory: void,
+	playerInventory: u32,
 	sharedTestingInventory: void,
+	hand: u32,
 	other: void,
 };
 

src/game.zig

@@ -580,7 +580,7 @@ pub const World = struct { // MARK: World
 		try assets.loadWorldAssets("serverAssets", self.blockPalette, self.biomePalette);
 		Player.loadFrom(zon.getChild("player"));
 		Player.id = zon.get(u32, "player_id", std.math.maxInt(u32));
-		Player.inventory = Inventory.init(main.globalAllocator, 32, .normal, .playerInventory);
+		Player.inventory = Inventory.init(main.globalAllocator, 32, .normal, .{.playerInventory = Player.id});
 	}
 
 	pub fn update(self: *World) void {

src/gui/gui.zig

@@ -593,7 +593,7 @@ pub const inventory = struct { // MARK: inventory
 	var initialized: bool = false;
 
 	pub fn init() void {
-		carried = Inventory.init(main.globalAllocator, 1, .normal, .other);
+		carried = Inventory.init(main.globalAllocator, 1, .normal, .{.hand = main.game.Player.id});
 		leftClickSlots = .init(main.globalAllocator);
 		rightClickSlots = .init(main.globalAllocator);
 		carriedItemSlot = ItemSlot.init(.{0, 0}, carried, 0, .default, .normal);

src/server/server.zig

@@ -70,6 +70,12 @@ pub const User = struct { // MARK: User
 
 	pub fn deinit(self: *User) void {
 		std.debug.assert(self.refCount.load(.monotonic) == 0);
+
+		world.?.savePlayer(self) catch |err| {
+			std.log.err("Failed to save player: {s}", .{@errorName(err)});
+			return;
+		};
+
 		main.items.Inventory.Sync.ServerSide.disconnectUser(self);
 		std.debug.assert(self.inventoryClientToServerIdMap.count() == 0); // leak
 		self.inventoryClientToServerIdMap.deinit();

src/server/world.zig

@@ -815,8 +815,12 @@ pub const ServerWorld = struct { // MARK: ServerWorld
 		{
 			main.items.Inventory.Sync.ServerSide.mutex.lock();
 			defer main.items.Inventory.Sync.ServerSide.mutex.unlock();
-			if (main.items.Inventory.Sync.ServerSide.getInventoryFromSource(.playerInventory)) |inv| {
-				playerZon.put("inventory", inv.save(main.stackAllocator));
+			if (main.items.Inventory.Sync.ServerSide.getInventoryFromSource(.{.playerInventory = user.id})) |inv| {
+				playerZon.put("playerInventory", inv.save(main.stackAllocator));
+			}
+
+			if (main.items.Inventory.Sync.ServerSide.getInventoryFromSource(.{.hand = user.id})) |inv| {
+				playerZon.put("hand", inv.save(main.stackAllocator));
 			}
 		}