--- /dev/null
+'use strict';
+/**
+ * `confirm` type prompt
+ */
+
+var _ = {
+ extend: require('lodash/extend'),
+ isBoolean: require('lodash/isBoolean'),
+};
+var chalk = require('chalk');
+var { take, takeUntil } = require('rxjs/operators');
+var Base = require('./base');
+var observe = require('../utils/events');
+
+class ConfirmPrompt extends Base {
+ constructor(questions, rl, answers) {
+ super(questions, rl, answers);
+
+ var rawDefault = true;
+
+ _.extend(this.opt, {
+ filter: function (input) {
+ var value = rawDefault;
+ if (input != null && input !== '') {
+ value = /^y(es)?/i.test(input);
+ }
+
+ return value;
+ },
+ });
+
+ if (_.isBoolean(this.opt.default)) {
+ rawDefault = this.opt.default;
+ }
+
+ this.opt.default = rawDefault ? 'Y/n' : 'y/N';
+ }
+
+ /**
+ * Start the Inquiry session
+ * @param {Function} cb Callback when prompt is done
+ * @return {this}
+ */
+
+ _run(cb) {
+ this.done = cb;
+
+ // Once user confirm (enter key)
+ var events = observe(this.rl);
+ events.keypress.pipe(takeUntil(events.line)).forEach(this.onKeypress.bind(this));
+
+ events.line.pipe(take(1)).forEach(this.onEnd.bind(this));
+
+ // Init
+ this.render();
+
+ return this;
+ }
+
+ /**
+ * Render the prompt to screen
+ * @return {ConfirmPrompt} self
+ */
+
+ render(answer) {
+ var message = this.getQuestion();
+
+ if (typeof answer === 'boolean') {
+ message += chalk.cyan(answer ? 'Yes' : 'No');
+ } else {
+ message += this.rl.line;
+ }
+
+ this.screen.render(message);
+
+ return this;
+ }
+
+ /**
+ * When user press `enter` key
+ */
+
+ onEnd(input) {
+ this.status = 'answered';
+
+ var output = this.opt.filter(input);
+ this.render(output);
+
+ this.screen.done();
+ this.done(output);
+ }
+
+ /**
+ * When user press a key
+ */
+
+ onKeypress() {
+ this.render();
+ }
+}
+
+module.exports = ConfirmPrompt;