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index.js
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index.js
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'use strict';
/**
* Combined `input` and `password` type prompt
* with auto submit support
*/
const chalk = require('chalk');
const {map, takeUntil} = require('rxjs/operators');
const Base = require('inquirer/lib/prompts/base');
const observe = require('inquirer/lib/utils/events');
function mask(input, maskChar) {
input = String(input);
maskChar = typeof maskChar === 'string' ? maskChar : '*';
if (input.length === 0) {
return '';
}
return new Array(input.length + 1).join(maskChar);
}
class InputPrompt extends Base {
/**
* Start the Inquiry session
* @param {Function} cb Callback when prompt is done
* @return {this}
*/
_run(cb) {
this.done = cb;
// Once user confirm (enter key)
const events = observe(this.rl);
const submit = events.line.pipe(map(this.filterInput.bind(this)));
const validation = this.handleSubmitEvents(submit);
validation.success.forEach(this.onEnd.bind(this));
validation.error.forEach(this.onError.bind(this));
events.keypress
.pipe(takeUntil(validation.success))
.forEach(this.onKeypress.bind(this));
// Init
this.render();
return this;
}
/**
* Render the prompt to screen
* @return {InputPrompt} self
*/
render(error) {
let bottomContent = '';
let appendContent = '';
let message = this.getQuestion();
const {transformer} = this.opt;
const isFinal = this.status === 'answered';
if (isFinal) {
appendContent = this.answer;
} else {
appendContent = this.rl.line || '';
}
if (this.opt.secret) {
// Password transform
if (isFinal) {
message += this.opt.mask ?
chalk.cyan(mask(appendContent, this.opt.mask)) :
chalk.italic.dim('[hidden]');
} else if (this.opt.mask) {
message += mask(appendContent, this.opt.mask);
} else {
message += chalk.italic.dim('[input is hidden] ');
}
// Input transform
} else if (transformer) {
message += transformer(appendContent, this.answers, {isFinal});
} else {
message += isFinal ? chalk.cyan(appendContent) : appendContent;
}
if (error) {
bottomContent = chalk.red('>> ') + error;
}
this.screen.render(message, bottomContent);
}
/**
* When user press `enter` key
*/
filterInput(input) {
if (!input) {
return this.opt.default === null ? '' : this.opt.default;
}
return input;
}
onEnd(state) {
this.answer = state.value;
this.status = 'answered';
// Re-render prompt
this.render();
this.screen.done();
this.done(state.value);
}
onError(state) {
this.render(state.isValid);
}
/**
* When user press a key
*/
onKeypress() {
// If user press a key, just clear the default value
const {autoSubmit} = this.opt;
if (this.opt.default) {
this.opt.default = undefined;
}
if (autoSubmit && typeof autoSubmit === 'function') {
if (autoSubmit(this.rl.line)) {
this.rl.emit('line', this.rl.line);
this.rl.line = '';
}
}
this.render();
}
}
module.exports = InputPrompt;