const Core = require('./core'); class OpenTtd extends Core { async run(state) { { const [reader, version] = await this.query(0, 1, 1, 4); if (version >= 4) { const numGrf = reader.uint(1); state.raw.grfs = []; for (let i = 0; i < numGrf; i++) { const grf = {}; grf.id = reader.part(4).toString('hex'); grf.md5 = reader.part(16).toString('hex'); state.raw.grfs.push(grf); } } if (version >= 3) { state.raw.date_current = this.readDate(reader); state.raw.date_start = this.readDate(reader); } if (version >= 2) { state.raw.maxcompanies = reader.uint(1); state.raw.numcompanies = reader.uint(1); state.raw.maxspectators = reader.uint(1); } state.name = reader.string(); state.raw.version = reader.string(); state.raw.language = this.decode( reader.uint(1), ['any', 'en', 'de', 'fr'] ); state.password = !!reader.uint(1); state.maxplayers = reader.uint(1); state.players.setNum(reader.uint(1)); state.raw.numspectators = reader.uint(1); state.map = reader.string(); state.raw.map_width = reader.uint(2); state.raw.map_height = reader.uint(2); state.raw.landscape = this.decode( reader.uint(1), ['temperate', 'arctic', 'desert', 'toyland'] ); state.raw.dedicated = !!reader.uint(1); } { const [reader,version] = await this.query(2,3,-1,-1); // we don't know how to deal with companies outside version 6 if(version === 6) { state.raw.companies = []; const numCompanies = reader.uint(1); for (let iCompany = 0; iCompany < numCompanies; iCompany++) { const company = {}; company.id = reader.uint(1); company.name = reader.string(); company.year_start = reader.uint(4); company.value = reader.uint(8).toString(); company.money = reader.uint(8).toString(); company.income = reader.uint(8).toString(); company.performance = reader.uint(2); company.password = !!reader.uint(1); const vehicle_types = ['train', 'truck', 'bus', 'aircraft', 'ship']; const station_types = ['station', 'truckbay', 'busstation', 'airport', 'dock']; company.vehicles = {}; for (const type of vehicle_types) { company.vehicles[type] = reader.uint(2); } company.stations = {}; for (const type of station_types) { company.stations[type] = reader.uint(2); } company.clients = reader.string(); state.raw.companies.push(company); } } } } async query(type,expected,minver,maxver) { const b = Buffer.from([0x03,0x00,type]); return await this.udpSend(b,(buffer) => { const reader = this.reader(buffer); const packetLen = reader.uint(2); if(packetLen !== buffer.length) { this.debugLog('Invalid reported packet length: '+packetLen+' '+buffer.length); return; } const packetType = reader.uint(1); if(packetType !== expected) { this.debugLog('Unexpected response packet type: '+packetType); return; } const protocolVersion = reader.uint(1); if((minver !== -1 && protocolVersion < minver) || (maxver !== -1 && protocolVersion > maxver)) { throw new Error('Unknown protocol version: '+protocolVersion+' Expected: '+minver+'-'+maxver); } return [reader,protocolVersion]; }); } readDate(reader) { const daysSinceZero = reader.uint(4); const temp = new Date(0,0,1); temp.setFullYear(0); temp.setDate(daysSinceZero+1); return temp.toISOString().split('T')[0]; } decode(num,arr) { if(num < 0 || num >= arr.length) { return num; } return arr[num]; } } module.exports = OpenTtd;