ProtoDef TEST

const ProtoDef = require("protodef").ProtoDef;
const Serializer = require("protodef").Serializer;
const Parser = require("protodef").Parser;

// the protocol can be in a separate json file
const example_protocol={
  "container": "native",
  "varint": "native",
  "byte": "native",
  "bool": "native",
  "switch": "native",
  "entity_look": [
        "container",
        [
            {
                "name": "entityId",
                "type": "varint"
            },
            {
                "name": "yaw",
                "type": "i8"
            },
            {
                "name": "pitch",
                "type": "i8"
            },
            {
                "name": "onGround",
                "type": "bool"
            }
        ]
  ],
  "packet": [
        "container",
        [
            {
                "name": "name",
                "type": [
                    "mapper",
                    {
                        "type": "varint",
                        "mappings": {
                            "22": "entity_look"
                        }
                    }
                ]
            },
            {
                "name": "params",
                "type": [
                    "switch",
                    {
                        "compareTo": "name",
                        "fields": {
                            "entity_look": "entity_look"
                        }
                    }
                ]
            }
        ]
  ]
};

const proto = new ProtoDef();
proto.addTypes(example_protocol);
const parser = new Parser(proto, "packet");
const serializer = new Serializer(proto, "packet");

serializer.write({
  name: "entity_look",
  params: {
    "entityId": 1,
    "yaw": 1,
    "pitch": 1,
    "onGround": true
  }
});
serializer.pipe(parser);

parser.on('data', function (chunk) {
  console.log(JSON.stringify(chunk, null, 2));
});


##############################################
#               Результат:                   #
##############################################

{
    "data": {
        "name": "entity_look",
        "params": {
            "entityId": 1,
            "yaw": 1,
            "pitch": 1,
            "onGround": true
        }
    },
    "metadata": {
        "size": 5
    },
    "buffer": {
        "type": "Buffer",
        "data": [
            22,
            1,
            1,
            1,
            1
        ]
    }
}