6 var chalk = require('chalk');
7 var { map, takeUntil } = require('rxjs/operators');
8 var Base = require('./base');
9 var observe = require('../utils/events');
11 class InputPrompt extends Base {
13 * Start the Inquiry session
14 * @param {Function} cb Callback when prompt is done
21 // Once user confirm (enter key)
22 var events = observe(this.rl);
23 var submit = events.line.pipe(map(this.filterInput.bind(this)));
25 var validation = this.handleSubmitEvents(submit);
26 validation.success.forEach(this.onEnd.bind(this));
27 validation.error.forEach(this.onError.bind(this));
30 .pipe(takeUntil(validation.success))
31 .forEach(this.onKeypress.bind(this));
40 * Render the prompt to screen
41 * @return {InputPrompt} self
45 var bottomContent = '';
46 var appendContent = '';
47 var message = this.getQuestion();
48 var transformer = this.opt.transformer;
49 var isFinal = this.status === 'answered';
52 appendContent = this.answer;
54 appendContent = this.rl.line;
58 message += transformer(appendContent, this.answers, { isFinal });
60 message += isFinal ? chalk.cyan(appendContent) : appendContent;
64 bottomContent = chalk.red('>> ') + error;
67 this.screen.render(message, bottomContent);
71 * When user press `enter` key
76 return this.opt.default == null ? '' : this.opt.default;
83 this.answer = state.value;
84 this.status = 'answered';
90 this.done(state.value);
93 onError({ value = '', isValid }) {
94 this.rl.line += value;
95 this.rl.cursor += value.length;
100 * When user press a key
104 // If user press a key, just clear the default value
105 if (this.opt.default) {
106 this.opt.default = undefined;
113 module.exports = InputPrompt;