...

src/server/chunk.zig

@@ -0,0 +1,30 @@
+const std = @import("std");
+const shared = @import("shared");
+const server = @import("server.zig");
+
+pub fn spawn(chunk: *shared.chunk.Chunk(), comptime T: type, allocator: std.mem.Allocator, value: T, w: *std.Io.Writer) !void {
+    const id = server.next_entity_id;
+    server.next_entity_id += 1;
+
+    var entity = value;
+    entity.id = id;
+
+    inline for (@typeInfo(shared.chunk.Chunk()).@"struct".fields) |field| {
+        if (field.type == shared.chunk.Storage(T)) {
+            try @field(chunk, field.name).items.append(allocator, entity);
+            return;
+        }
+    }
+
+    // serialize entity
+    var buffer: [64]u8 = undefined;
+    var fbs = std.io.fixedBufferStream(&buffer);
+    try T.encode(entity, fbs.writer());
+
+    try shared.protocol.write_message(
+        w,
+        .spawn_entity,
+        fbs.getWritten(),
+    );
+    try w.flush();
+}