text: 'use strict';
  var { fromEvent } = require('rxjs');
  var { filter, map, share } = require('rxjs/operators');
  
  function normalizeKeypressEvents(value, key) {
    return { value: value, key: key || {} };
  }
  
  module.exports = function(rl) {
    var keypress = fromEvent(rl.input, 'keypress', normalizeKeypressEvents)
      // Ignore `enter` key. On the readline, we only care about the `line` event.
      .pipe(filter(({ key }) => key.name !== 'enter' && key.name !== 'return'));
  
    return {
      line: fromEvent(rl, 'line'),
      keypress: keypress,
  
      normalizedUpKey: keypress.pipe(
        filter(
          ({ key }) =>
            key.name === 'up' || key.name === 'k' || (key.name === 'p' && key.ctrl)
        ),
        share()
      ),
  
      normalizedDownKey: keypress.pipe(
        filter(
          ({ key }) =>
            key.name === 'down' || key.name === 'j' || (key.name === 'n' && key.ctrl)
        ),
        share()
      ),
  
      numberKey: keypress.pipe(
        filter(e => e.value && '123456789'.indexOf(e.value) >= 0),
        map(e => Number(e.value)),
        share()
      ),
  
      spaceKey: keypress.pipe(
        filter(({ key }) => key && key.name === 'space'),
        share()
      ),
      aKey: keypress.pipe(
        filter(({ key }) => key && key.name === 'a'),
        share()
      ),
      iKey: keypress.pipe(
        filter(({ key }) => key && key.name === 'i'),
        share()
      )
    };
  };
  