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- /**
- * `input` type prompt
- */
- var _ = require("lodash");
- var util = require("util");
- var chalk = require("chalk");
- var Base = require("./base");
- var observe = require("../utils/events");
- /**
- * Module exports
- */
- module.exports = Prompt;
- /**
- * Constructor
- */
- function Prompt() {
- return Base.apply( this, arguments );
- }
- util.inherits( Prompt, Base );
- /**
- * Start the Inquiry session
- * @param {Function} cb Callback when prompt is done
- * @return {this}
- */
- Prompt.prototype._run = function( cb ) {
- this.done = cb;
- // Once user confirm (enter key)
- var events = observe(this.rl);
- var submit = events.line.map( this.filterInput.bind(this) );
- var validation = this.handleSubmitEvents( submit );
- validation.success.forEach( this.onEnd.bind(this) );
- validation.error.forEach( this.onError.bind(this) );
- events.keypress.takeUntil( validation.success ).forEach( this.onKeypress.bind(this) );
- // Init
- this.render();
- return this;
- };
- /**
- * Render the prompt to screen
- * @return {Prompt} self
- */
- Prompt.prototype.render = function (error) {
- var cursor = 0;
- var message = this.getQuestion();
- if (this.status === 'answered') {
- message += chalk.cyan(this.answer);
- } else {
- message += this.rl.line;
- }
- if (error) {
- message += '\n' + chalk.red('>> ') + error;
- cursor++;
- }
- this.screen.render(message, { cursor: cursor });
- };
- /**
- * When user press `enter` key
- */
- Prompt.prototype.filterInput = function( input ) {
- if ( !input ) {
- return this.opt.default != null ? this.opt.default : "";
- }
- return input;
- };
- Prompt.prototype.onEnd = function( state ) {
- this.filter( state.value, function( filteredValue ) {
- this.answer = filteredValue;
- this.status = "answered";
- // Re-render prompt
- this.render();
- this.screen.done();
- this.done( state.value );
- }.bind(this));
- };
- Prompt.prototype.onError = function( state ) {
- this.render(state.isValid);
- };
- /**
- * When user press a key
- */
- Prompt.prototype.onKeypress = function() {
- this.render();
- };
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