index.js

'use strict';

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

const prompts = require('./prompts');

const passOn = ['suggest', 'format', 'onState', 'validate', 'onRender', 'type'];

const noop = () => {};
/**
 * Prompt for a series of questions
 * @param {Array|Object} questions Single question object or Array of question objects
 * @param {Function} [onSubmit] Callback function called on prompt submit
 * @param {Function} [onCancel] Callback function called on cancel/abort
 * @returns {Object} Object with values from user input
 */


function prompt() {
  return _prompt.apply(this, arguments);
}

function _prompt() {
  _prompt = _asyncToGenerator(function* (questions = [], {
    onSubmit = noop,
    onCancel = noop
  } = {}) {
    const answers = {};
    const override = prompt._override || {};
    questions = [].concat(questions);
    let answer, question, quit, name, type, lastPrompt;

    const getFormattedAnswer = /*#__PURE__*/function () {
      var _ref = _asyncToGenerator(function* (question, answer, skipValidation = false) {
        if (!skipValidation && question.validate && question.validate(answer) !== true) {
          return;
        }

        return question.format ? yield question.format(answer, answers) : answer;
      });

      return function getFormattedAnswer(_x, _x2) {
        return _ref.apply(this, arguments);
      };
    }();

    var _iteratorNormalCompletion = true;
    var _didIteratorError = false;
    var _iteratorError = undefined;

    try {
      for (var _iterator = questions[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
        question = _step.value;
        var _question = question;
        name = _question.name;
        type = _question.type;

        // evaluate type first and skip if type is a falsy value
        if (typeof type === 'function') {
          type = yield type(answer, _objectSpread({}, answers), question);
          question['type'] = type;
        }

        if (!type) continue; // if property is a function, invoke it unless it's a special function

        for (let key in question) {
          if (passOn.includes(key)) continue;
          let value = question[key];
          question[key] = typeof value === 'function' ? yield value(answer, _objectSpread({}, answers), lastPrompt) : value;
        }

        lastPrompt = question;

        if (typeof question.message !== 'string') {
          throw new Error('prompt message is required');
        } // update vars in case they changed


        var _question2 = question;
        name = _question2.name;
        type = _question2.type;

        if (prompts[type] === void 0) {
          throw new Error(`prompt type (${type}) is not defined`);
        }

        if (override[question.name] !== undefined) {
          answer = yield getFormattedAnswer(question, override[question.name]);

          if (answer !== undefined) {
            answers[name] = answer;
            continue;
          }
        }

        try {
          // Get the injected answer if there is one or prompt the user
          answer = prompt._injected ? getInjectedAnswer(prompt._injected) : yield prompts[type](question);
          answers[name] = answer = yield getFormattedAnswer(question, answer, true);
          quit = yield onSubmit(question, answer, answers);
        } catch (err) {
          quit = !(yield onCancel(question, answers));
        }

        if (quit) return answers;
      }
    } catch (err) {
      _didIteratorError = true;
      _iteratorError = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion && _iterator.return != null) {
          _iterator.return();
        }
      } finally {
        if (_didIteratorError) {
          throw _iteratorError;
        }
      }
    }

    return answers;
  });
  return _prompt.apply(this, arguments);
}

function getInjectedAnswer(injected) {
  const answer = injected.shift();

  if (answer instanceof Error) {
    throw answer;
  }

  return answer;
}

function inject(answers) {
  prompt._injected = (prompt._injected || []).concat(answers);
}

function override(answers) {
  prompt._override = Object.assign({}, answers);
}

module.exports = Object.assign(prompt, {
  prompt,
  prompts,
  inject,
  override
});