rapier/example/example.js

A JavaScript Dota 2 (Source 2) replay parsing library.

var Parser = require('../Parser');
//parser accepts a stream or buffer, returns an eventemitter
var p = new Parser(process.stdin);
//var p = new Parser(require('fs').readFileSync('./testfiles/1698148651_source2.dem'));
//PROPERTIES
//the parser exposes these properties in order to help you interpret the content of the messages
var types = p.types;
var game_event_descriptors = p.game_event_descriptors;
var string_tables = p.string_tables;
var entities = p.entities;
//EVENTS
//add an event listener with the name of the protobuf message in order to listen for it
//full dem/packet listing is in build/types.json, or user can refer to original .proto files
//WARNING: not every type listed is actually in the replay--it's automatically generated from enums in .protos!
//-
//game epilogue
p.on("CDemoFileInfo", function(data) {
    console.log(data);
});

//all chat
p.on("CUserMessageSayText2", function(data) {
    console.log(data);
});
//map pings
p.on("CDOTAUserMsg_LocationPing", function(data) {
    //console.log(data);
});
//user actions
p.on("CDOTAUserMsg_SpectatorPlayerUnitOrders", function(data) {
    //console.log(data);
});
//objectives
p.on("CDOTAUserMsg_ChatEvent", function(data) {
    //look up the type with DOTA_CHAT_MESSAGE
    data.type = types.DOTA_CHAT_MESSAGE[data.type];
    //console.log(data);
});
//gameevents
p.on("CMsgSource1LegacyGameEvent", function(data) {
    //get the event name from descriptor
    data.event_name = game_event_descriptors[data.eventid].name;
    //use the descriptor to read the gameevent data
    var gameEvent = {};
    data.keys.forEach(function(k, i) {
        var key = game_event_descriptors[data.eventid].keys[i].name;
        var index = game_event_descriptors[data.eventid].keys[i].type;
        //get the value of the key in object for that type
        var value = k[Object.keys(k)[index]];
        //populate the gameevent
        gameEvent[key] = value;
    });
    //combat log is a type of gameevent
    //gameevent types are not listed in the .protos, but are defined in the GameEventDescriptors contained within a replay
    //therefore we don't know what game event types are available or what data they contain until runtime 
    if (data.event_name === "dota_combatlog") {
        var cle = gameEvent;
        //look up the type with DOTA_COMBATLOG_TYPES
        cle.type = types.DOTA_COMBATLOG_TYPES[cle.type];
        //translate the entries using stringtable
        var combatLogNames = string_tables.byName["CombatLogNames"];
        //following fields might require a translation with stringtable, but whether they do is dependent on the combat log type
        cle.sourcename = combatLogNames.string_data[cle.sourcename].key;
        cle.targetname = combatLogNames.string_data[cle.targetname].key;
        cle.attackername = combatLogNames.string_data[cle.attackername].key;
        cle.inflictorname = combatLogNames.string_data[cle.inflictorname].key;
        cle.targetsourcename = combatLogNames.string_data[cle.targetsourcename].key;
        //value needs a translation for certain types (for example, purchases), other times it's just an integer
        cle.valuename = combatLogNames[cle.value] ? combatLogNames[cle.value].key : null;
        //console.log(cle);
    }
});
//every tick
p.on("CNETMsg_Tick", function(data){
    //console.log(data);
});
//console data (includes some stun/slow data and damage breakdown by target/ability)
p.on("CUserMessageTextMsg", function(data){
    //console.log(data);
});

//everything
//p.on("*", function(data){console.log(data);})
console.time('parse');
//start takes a callback function that is called when the parse completes
p.start(function(err) {
    if (err) {
        console.log(err);
    }
    console.timeEnd('parse');
});