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convert.js

Welcome to the conversion module. It takes care of turning an AST into something you can use a little more easily. Note that this is a one way operation - JavaScript doesn't keep enough information about numeric types to go back to AST from an object.

 
module.exports = Convert;

Here's the main entry point!

var converted_object = nibbit.convert(ast);

Basically it wraps the whole thing in an object if the first level tag has a name. If this makes no sense, go check out the NBT documentation.

 
function Convert(ast) {
  if (ast[1] !== null) {
    var r = {};
    r[ast[1]] = Convert[ast[0]](ast);
    return r;
  } else {
    return Convert[ast[0]](ast);
  }
}

All these types just pass right on through, pretty simple. These are the byte, short, int, long, float, double, byte array and int array types.

 
[1,2,3,4,5,6,7,8,11].forEach(function(t) {
  Convert[t] = function(v) { return v[2]; };
});

This is a list - think list<object> in C++

 
Convert[9] = function(v) {
  var r = [];

  v[2].forEach(function(e) {
    r.push(Convert[e[0]](e));
  });

  return r;
};

This is a compound - think list<pair<string,object>> in C++

 
Convert[10] = function(v) {
  var r = {};

  v[2].forEach(function(e) {
    r[e[1]] = Convert[e[0]](e);
  });

  return r;
};