498 lines
12 KiB
JavaScript
498 lines
12 KiB
JavaScript
'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;
|