minet-protocol-converter
Version:
288 lines (265 loc) • 8.69 kB
JavaScript
;
let fs = require('fs'),
download = require('download-file-sync'),
xml = require('xml2js').parseString;
let mappings = {};
let fields_switch = {};
let template = {
"types": {
//Types
"string": [
"pstring", {
"countType":"i16"
}],
"lstring": [
"pstring", {
"countType":"li16"
}],
"vector3":[
"container", [{
"name": "x",
"type": "f32"
}, {
"name": "y",
"type": "f32"
}, {
"name": "z",
"type": "f32"
}]],
"vector2":[
"container", [{
"name": "x",
"type": "f32"
}, {
"name": "y",
"type": "f32"
}]],
"playerlocation": [
"array", {
"countType":"i16",
"type": [
"container", [{
"name": "x",
"type": "f32"
}, {
"name": "y",
"type": "f32"
}, {
"name": "z",
"type": "f32"
}, {
"name": "yaw",
"type": "f32"
}, {
"name": "pitch",
"type": "f32"
}, {
"name": "headYaw",
"type": "f32"
}]]}],
//Packets
"encapsulated_packet":[
"container",
[
{
"name": "name",
"type": [
"mapper",
{
"type": "u8",
"mappings": {
"0xfe": "mcpe"
}
}
]
},
{
"name": "params",
"type":[
"switch",
{
"compareTo": "name",
"fields":{
"mcpe": "mcpe_packet"
}
}
]
}
]
],
"mcpe_packet": [
"container",
[
{
"name": "name",
"type": [
"mapper",
{
"type": "u8",
"mappings": mappings
}
]
},
{
"name": "params",
"type": [
"switch",
{
"compareTo": "name",
"fields": fields_switch
}
]
}
]
]
}
}
module.exports = (callback) => {
/* Download the protocol from the MiNET repo */
xml(download('https://raw.githubusercontent.com/NiclasOlofsson/MiNET/master/src/MiNET/MiNET/Net/MCPE%20Protocol.xml'), (err, res) => {
const Protocol = res.protocol.pdu;
/* Parse and add every packet */
Protocol.forEach((packet) => {
let Packet = {
name: convertName(packet.$.name.toLowerCase().split(' ').join('_').replace('mcpe_', '')),
id: packet.$.id,
type: 'packet_',
online: packet.$.online,
fields: []
};
Packet.type += Packet.name;
if (!Packet.name)
return;
Packet.fields = customPacket(Packet.name);
if (packet.field && Packet.fields.length <= 0)
packet.field.forEach((field) => {
Packet.fields.push({
name: field.$.name.toLowerCase().split(' ').join('_'),
type: convertType(field.$.type.toLowerCase().split(' ').join('_'))
});
});
mappings[Packet.id] = Packet.name;
fields_switch[Packet.name] = Packet.type;
template.types[Packet.type] = ['container', Packet.fields];
});
fs.writeFileSync('output.json', JSON.stringify(template, null, 4));
callback();
});
/* Handle edge-cases (thanks protodef :P) */
function convertType (type) {
switch (type) {
case 'signedvarlong':
case 'unsignedvarlong':
case 'varlong':
case 'signedvarint':
case 'unsignedvarint':
return 'varint';
case 'byte':
return 'u8';
case 'short':
return 'i16';
case 'int':
return 'i32';
case 'uint':
return 'u32';
case 'float':
return 'f32';
case 'long':
return 'i64';
case 'ulong':
return 'u64';
case 'bytearray':
case 'byte[]':
return ["buffer", {
"countType": "varint",
"type": "i8"
}]; //FIXME: is this right?
//FIXME: !!!
case 'blockcoordinates':
case 'mapinfo':
case 'nbt':
case 'item':
case 'itemstacks':
case 'recipes':
case 'playerrecords':
case 'playerattributes':
case 'entityattributes':
case 'records':
case 'metadatadictionary':
case 'metadataints':
case 'rules':
case 'resourcepackidversions':
case 'resourcepackinfos':
return 'varint';
default:
return type;
}
}
function convertName (name) {
if (name.substring(0, 3) == 'id_')
return null;
switch (name) {
case 'login':
return 'game_login';
case 'server_exchange':
return 'server_to_client_handshake';
case 'client_magic':
return 'client_to_server_handshake';
case 'ftl_create_player':
return 'game_login';
case 'wrapper': //MCPE packet
return null;
default:
return name;
}
}
function customPacket (name) {
switch (name) {
case 'game_login':
return [{
"name": "protocol",
"type": "i32"
}, {
"name": "edition",
"type": "i8"
}, {
"name": "body",
"type": [
"buffer", {
"countType": "varint"
}]}];
case 'text':
return [{
"name": "type",
"type": "i8"
}, {
"name": "source",
"type": [
"switch", {
"compareTo": "type",
"fields": {
"1": "string",
"3": "string"
},
"default": "void"
}
]}, {
"name": "message",
"type": [
"switch", {
"compareTo": "type",
"fields": {
"0": "string",
"1": "string",
"2": "string",
"3": "string",
"4": "string",
"5": "string"
},
"default": "void"
}]}];
default:
return [];
}
}
};