node-midi-helpers.js

export function listNodeMidiPorts(portType) {
  const io = new require('midi')[portType]()

  return Array(io.getPortCount())
    .fill(null)
    .map((_, index) => io.getPortName(index))
}

export function getNodeMidiPortNumberByName(portType, name) {
  const io = new require('midi')[portType]()
  const matches = str =>
    name instanceof RegExp ? name.test(str) : str === name

  for (let i = 0; i < io.getPortCount(); i++) {
    if (matches(io.getPortName(i))) {
      return i
    }
  }
}