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app_vue/node_modules/enquirer/lib/prompt.js

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+'use strict';
+
+const Events = require('events');
+const stripAnsi = require('strip-ansi');
+const keypress = require('./keypress');
+const timer = require('./timer');
+const State = require('./state');
+const theme = require('./theme');
+const utils = require('./utils');
+const ansi = require('./ansi');
+
+/**
+ * Base class for creating a new Prompt.
+ * @param {Object} `options` Question object.
+ */
+
+class Prompt extends Events {
+  constructor(options = {}) {
+    super();
+    this.name = options.name;
+    this.type = options.type;
+    this.options = options;
+    theme(this);
+    timer(this);
+    this.state = new State(this);
+    this.initial = [options.initial, options.default].find(v => v != null);
+    this.stdout = options.stdout || process.stdout;
+    this.stdin = options.stdin || process.stdin;
+    this.scale = options.scale || 1;
+    this.term = this.options.term || process.env.TERM_PROGRAM;
+    this.margin = margin(this.options.margin);
+    this.setMaxListeners(0);
+    setOptions(this);
+  }
+
+  async keypress(input, event = {}) {
+    this.keypressed = true;
+    let key = keypress.action(input, keypress(input, event), this.options.actions);
+    this.state.keypress = key;
+    this.emit('keypress', input, key);
+    this.emit('state', this.state.clone());
+
+    const fn = this.options[key.action] || this[key.action] || this.dispatch;
+
+    if (typeof fn === 'function') {
+      return await fn.call(this, input, key);
+    }
+
+    this.alert();
+  }
+
+  alert() {
+    delete this.state.alert;
+    if (this.options.show === false) {
+      this.emit('alert');
+    } else {
+      this.stdout.write(ansi.code.beep);
+    }
+  }
+
+  cursorHide() {
+    this.stdout.write(ansi.cursor.hide());
+    const releaseOnExit = utils.onExit(() => this.cursorShow());
+    this.on('close', () => {
+      this.cursorShow();
+      releaseOnExit();
+    });
+  }
+
+  cursorShow() {
+    this.stdout.write(ansi.cursor.show());
+  }
+
+  write(str) {
+    if (!str) return;
+    if (this.stdout && this.state.show !== false) {
+      this.stdout.write(str);
+    }
+    this.state.buffer += str;
+  }
+
+  clear(lines = 0) {
+    let buffer = this.state.buffer;
+    this.state.buffer = '';
+    if ((!buffer && !lines) || this.options.show === false) return;
+    this.stdout.write(ansi.cursor.down(lines) + ansi.clear(buffer, this.width));
+  }
+
+  restore() {
+    if (this.state.closed || this.options.show === false) return;
+
+    let { prompt, after, rest } = this.sections();
+    let { cursor, initial = '', input = '', value = '' } = this;
+
+    let size = this.state.size = rest.length;
+    let state = { after, cursor, initial, input, prompt, size, value };
+    let codes = ansi.cursor.restore(state);
+    if (codes) {
+      this.stdout.write(codes);
+    }
+  }
+
+  sections() {
+    let { buffer, input, prompt } = this.state;
+    prompt = stripAnsi(prompt);
+    let buf = stripAnsi(buffer);
+    let idx = buf.indexOf(prompt);
+    let header = buf.slice(0, idx);
+    let rest = buf.slice(idx);
+    let lines = rest.split('\n');
+    let first = lines[0];
+    let last = lines[lines.length - 1];
+    let promptLine = prompt + (input ? ' ' + input : '');
+    let len = promptLine.length;
+    let after = len < first.length ? first.slice(len + 1) : '';
+    return { header, prompt: first, after, rest: lines.slice(1), last };
+  }
+
+  async submit() {
+    this.state.submitted = true;
+    this.state.validating = true;
+
+    // this will only be called when the prompt is directly submitted
+    // without initializing, i.e. when the prompt is skipped, etc. Otherwize,
+    // "options.onSubmit" is will be handled by the "initialize()" method.
+    if (this.options.onSubmit) {
+      await this.options.onSubmit.call(this, this.name, this.value, this);
+    }
+
+    let result = this.state.error || await this.validate(this.value, this.state);
+    if (result !== true) {
+      let error = '\n' + this.symbols.pointer + ' ';
+
+      if (typeof result === 'string') {
+        error += result.trim();
+      } else {
+        error += 'Invalid input';
+      }
+
+      this.state.error = '\n' + this.styles.danger(error);
+      this.state.submitted = false;
+      await this.render();
+      await this.alert();
+      this.state.validating = false;
+      this.state.error = void 0;
+      return;
+    }
+
+    this.state.validating = false;
+    await this.render();
+    await this.close();
+
+    this.value = await this.result(this.value);
+    this.emit('submit', this.value);
+  }
+
+  async cancel(err) {
+    this.state.cancelled = this.state.submitted = true;
+
+    await this.render();
+    await this.close();
+
+    if (typeof this.options.onCancel === 'function') {
+      await this.options.onCancel.call(this, this.name, this.value, this);
+    }
+
+    this.emit('cancel', await this.error(err));
+  }
+
+  async close() {
+    this.state.closed = true;
+
+    try {
+      let sections = this.sections();
+      let lines = Math.ceil(sections.prompt.length / this.width);
+      if (sections.rest) {
+        this.write(ansi.cursor.down(sections.rest.length));
+      }
+      this.write('\n'.repeat(lines));
+    } catch (err) { /* do nothing */ }
+
+    this.emit('close');
+  }
+
+  start() {
+    if (!this.stop && this.options.show !== false) {
+      this.stop = keypress.listen(this, this.keypress.bind(this));
+      this.once('close', this.stop);
+      this.emit('start', this);
+    }
+  }
+
+  async skip() {
+    this.skipped = this.options.skip === true;
+    if (typeof this.options.skip === 'function') {
+      this.skipped = await this.options.skip.call(this, this.name, this.value);
+    }
+    return this.skipped;
+  }
+
+  async initialize() {
+    let { format, options, result } = this;
+
+    this.format = () => format.call(this, this.value);
+    this.result = () => result.call(this, this.value);
+
+    if (typeof options.initial === 'function') {
+      this.initial = await options.initial.call(this, this);
+    }
+
+    if (typeof options.onRun === 'function') {
+      await options.onRun.call(this, this);
+    }
+
+    // if "options.onSubmit" is defined, we wrap the "submit" method to guarantee
+    // that "onSubmit" will always called first thing inside the submit
+    // method, regardless of how it's handled in inheriting prompts.
+    if (typeof options.onSubmit === 'function') {
+      let onSubmit = options.onSubmit.bind(this);
+      let submit = this.submit.bind(this);
+      delete this.options.onSubmit;
+      this.submit = async() => {
+        await onSubmit(this.name, this.value, this);
+        return submit();
+      };
+    }
+
+    await this.start();
+    await this.render();
+  }
+
+  render() {
+    throw new Error('expected prompt to have a custom render method');
+  }
+
+  run() {
+    return new Promise(async(resolve, reject) => {
+      this.once('submit', resolve);
+      this.once('cancel', reject);
+
+      if (await this.skip()) {
+        this.render = () => {};
+        return this.submit();
+      }
+
+      await this.initialize();
+      this.emit('run');
+    });
+  }
+
+  async element(name, choice, i) {
+    let { options, state, symbols, timers } = this;
+    let timer = timers && timers[name];
+    state.timer = timer;
+    let value = options[name] || state[name] || symbols[name];
+    let val = choice && choice[name] != null ? choice[name] : await value;
+    if (val === '') return val;
+
+    let res = await this.resolve(val, state, choice, i);
+    if (!res && choice && choice[name]) {
+      return this.resolve(value, state, choice, i);
+    }
+    return res;
+  }
+
+  async prefix() {
+    let element = await this.element('prefix') || this.symbols;
+    let timer = this.timers && this.timers.prefix;
+    let state = this.state;
+    state.timer = timer;
+    if (utils.isObject(element)) element = element[state.status] || element.pending;
+    if (!utils.hasColor(element)) {
+      let style = this.styles[state.status] || this.styles.pending;
+      return style(element);
+    }
+    return element;
+  }
+
+  async message() {
+    let message = await this.element('message');
+    if (!utils.hasColor(message)) {
+      return this.styles.strong(message);
+    }
+    return message;
+  }
+
+  async separator() {
+    let element = await this.element('separator') || this.symbols;
+    let timer = this.timers && this.timers.separator;
+    let state = this.state;
+    state.timer = timer;
+    let value = element[state.status] || element.pending || state.separator;
+    let ele = await this.resolve(value, state);
+    if (utils.isObject(ele)) ele = ele[state.status] || ele.pending;
+    if (!utils.hasColor(ele)) {
+      return this.styles.muted(ele);
+    }
+    return ele;
+  }
+
+  async pointer(choice, i) {
+    let val = await this.element('pointer', choice, i);
+
+    if (typeof val === 'string' && utils.hasColor(val)) {
+      return val;
+    }
+
+    if (val) {
+      let styles = this.styles;
+      let focused = this.index === i;
+      let style = focused ? styles.primary : val => val;
+      let ele = await this.resolve(val[focused ? 'on' : 'off'] || val, this.state);
+      let styled = !utils.hasColor(ele) ? style(ele) : ele;
+      return focused ? styled : ' '.repeat(ele.length);
+    }
+  }
+
+  async indicator(choice, i) {
+    let val = await this.element('indicator', choice, i);
+    if (typeof val === 'string' && utils.hasColor(val)) {
+      return val;
+    }
+
+    if (val) {
+      let styles = this.styles;
+      let enabled = choice.enabled === true;
+      let style = enabled ? styles.success : styles.dark;
+      let ele = val[enabled ? 'on' : 'off'] || val;
+      return !utils.hasColor(ele) ? style(ele) : ele;
+    }
+
+    return '';
+  }
+
+  body() {
+    return null;
+  }
+
+  footer() {
+    if (this.state.status === 'pending') {
+      return this.element('footer');
+    }
+  }
+
+  header() {
+    if (this.state.status === 'pending') {
+      return this.element('header');
+    }
+  }
+
+  async hint() {
+    if (this.state.status === 'pending' && !this.isValue(this.state.input)) {
+      let hint = await this.element('hint');
+      if (!utils.hasColor(hint)) {
+        return this.styles.muted(hint);
+      }
+      return hint;
+    }
+  }
+
+  error(err) {
+    return !this.state.submitted ? (err || this.state.error) : '';
+  }
+
+  format(value) {
+    return value;
+  }
+
+  result(value) {
+    return value;
+  }
+
+  validate(value) {
+    if (this.options.required === true) {
+      return this.isValue(value);
+    }
+    return true;
+  }
+
+  isValue(value) {
+    return value != null && value !== '';
+  }
+
+  resolve(value, ...args) {
+    return utils.resolve(this, value, ...args);
+  }
+
+  get base() {
+    return Prompt.prototype;
+  }
+
+  get style() {
+    return this.styles[this.state.status];
+  }
+
+  get height() {
+    return this.options.rows || utils.height(this.stdout, 25);
+  }
+  get width() {
+    return this.options.columns || utils.width(this.stdout, 80);
+  }
+  get size() {
+    return { width: this.width, height: this.height };
+  }
+
+  set cursor(value) {
+    this.state.cursor = value;
+  }
+  get cursor() {
+    return this.state.cursor;
+  }
+
+  set input(value) {
+    this.state.input = value;
+  }
+  get input() {
+    return this.state.input;
+  }
+
+  set value(value) {
+    this.state.value = value;
+  }
+  get value() {
+    let { input, value } = this.state;
+    let result = [value, input].find(this.isValue.bind(this));
+    return this.isValue(result) ? result : this.initial;
+  }
+
+  static get prompt() {
+    return options => new this(options).run();
+  }
+}
+
+function setOptions(prompt) {
+  let isValidKey = key => {
+    return prompt[key] === void 0 || typeof prompt[key] === 'function';
+  };
+
+  let ignore = [
+    'actions',
+    'choices',
+    'initial',
+    'margin',
+    'roles',
+    'styles',
+    'symbols',
+    'theme',
+    'timers',
+    'value'
+  ];
+
+  let ignoreFn = [
+    'body',
+    'footer',
+    'error',
+    'header',
+    'hint',
+    'indicator',
+    'message',
+    'prefix',
+    'separator',
+    'skip'
+  ];
+
+  for (let key of Object.keys(prompt.options)) {
+    if (ignore.includes(key)) continue;
+    if (/^on[A-Z]/.test(key)) continue;
+    let option = prompt.options[key];
+    if (typeof option === 'function' && isValidKey(key)) {
+      if (!ignoreFn.includes(key)) {
+        prompt[key] = option.bind(prompt);
+      }
+    } else if (typeof prompt[key] !== 'function') {
+      prompt[key] = option;
+    }
+  }
+}
+
+function margin(value) {
+  if (typeof value === 'number') {
+    value = [value, value, value, value];
+  }
+  let arr = [].concat(value || []);
+  let pad = i => i % 2 === 0 ? '\n' : ' ';
+  let res = [];
+  for (let i = 0; i < 4; i++) {
+    let char = pad(i);
+    if (arr[i]) {
+      res.push(char.repeat(arr[i]));
+    } else {
+      res.push('');
+    }
+  }
+  return res;
+}
+
+module.exports = Prompt;