nflow/src/routes/current.js

event/data/control flow

import { createMatcher } from '../utils'
import { DIRECTION } from '../consts'
/*
 *  returns: only itself and the node emitting it
 */
export default (flow, matcher) => {
  const match = createMatcher(matcher)
  return [flow]
    .concat(flow.parent())
    .map((flow, i, arr) => ({
      flow,
      route: arr
        .slice(0, i + 1)
        .map((f, i) => ({
          flow: f,
          direction: i ? DIRECTION.UPSTREAM : DIRECTION.CURRENT
        }))
    }))
    .filter(f => match(f.flow))
}