mapEntityIdGenerator.js

var idableLayers = ['entities', 'switches']

module.exports = function(content) {
  this.cacheable && this.cacheable();
  var map = JSON.parse(content);
  var pathBits = this.resourcePath.split('/');
  var mapFilename = pathBits[pathBits.length - 1];
  if (map.layers) {
    map.layers.forEach(function(layer) {
      if (idableLayers.indexOf(layer.name) === -1 ) {
        return;
      }

      layer.objects.forEach(function(obj, i) {
        obj.properties = obj.properties || {};
        // Generate the ID.
        var idPieces = [];
        idPieces.push(mapFilename);
        idPieces.push(layer.name);
        idPieces.push(obj.name);
        idPieces.push(i);
        obj.properties.id = new Buffer(idPieces.join('|'), 'utf8').toString('base64');
      });
    });
  }
  return JSON.stringify(map);
};