Rollbar transform to normalize filenames for multitenant sourcemap support

rollbarconfig.js

var _rollbarConfig = {
  // ...
  transform: function(payload) {
    var trace = payload.data.body.trace;
    if (trace && trace.frames) {
      for (var i = 0; i < trace.frames.length; i++) {
        var filename = trace.frames[i].filename;
        if (filename) {
          // we have a frame with a filename
          // 1. TODO - check if the filename looks like it's part of our app (and not some external js)
          // 2. TODO - if it does, replace the dynamic hostname with a constant string, like "dynamichost"
          // Make sure to save it back to trace.frames[i].filename so that the original payload object is modified.
        }
      }
    }
  }
}