83 lines
2.0 KiB
PHP
83 lines
2.0 KiB
PHP
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<?php
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/**
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* ConsoleInput file.
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package Cake.Console
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* @since CakePHP(tm) v 2.0
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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/**
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* Object wrapper for interacting with stdin
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*
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* @package Cake.Console
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*/
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class ConsoleInput {
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/**
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* Input value.
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*
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* @var resource
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*/
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protected $_input;
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/**
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* Can this instance use readline?
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* Two conditions must be met:
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* 1. Readline support must be enabled.
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* 2. Handle we are attached to must be stdin.
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* Allows rich editing with arrow keys and history when inputting a string.
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*
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* @var boolean
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*/
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protected $_canReadline;
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/**
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* Constructor
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*
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* @param string $handle The location of the stream to use as input.
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*/
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public function __construct($handle = 'php://stdin') {
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$this->_canReadline = extension_loaded('readline') && $handle == 'php://stdin' ? true : false;
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$this->_input = fopen($handle, 'r');
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}
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/**
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* Read a value from the stream
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*
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* @return mixed The value of the stream
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*/
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public function read() {
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if ($this->_canReadline) {
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$line = readline('');
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if (!empty($line)) {
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readline_add_history($line);
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}
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return $line;
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}
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return fgets($this->_input);
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}
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/**
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* Checks if data is available on the stream
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*
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* @param integer $timeout An optional time to wait for data
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* @return boolean True for data available, false otherwise
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*/
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public function dataAvailable($timeout = 0) {
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$readFds = array($this->_input);
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$readyFds = stream_select($readFds, $writeFds, $errorFds, $timeout);
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return ($readyFds > 0);
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}
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}
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