/
ConsoleInput.php
81 lines (74 loc) · 1.96 KB
/
ConsoleInput.php
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<?php
/**
* ConsoleInput file.
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @since CakePHP(tm) v 2.0
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\Console;
/**
* Object wrapper for interacting with stdin
*
*/
class ConsoleInput {
/**
* Input value.
*
* @var resource
*/
protected $_input;
/**
* Can this instance use readline?
* Two conditions must be met:
* 1. Readline support must be enabled.
* 2. Handle we are attached to must be stdin.
* Allows rich editing with arrow keys and history when inputting a string.
*
* @var boolean
*/
protected $_canReadline;
/**
* Constructor
*
* @param string $handle The location of the stream to use as input.
*/
public function __construct($handle = 'php://stdin') {
$this->_canReadline = extension_loaded('readline') && $handle == 'php://stdin' ? true : false;
$this->_input = fopen($handle, 'r');
}
/**
* Read a value from the stream
*
* @return mixed The value of the stream
*/
public function read() {
if ($this->_canReadline) {
$line = readline('');
if (!empty($line)) {
readline_add_history($line);
}
return $line;
}
return fgets($this->_input);
}
/**
* Check if data is available on stdin
*
* @param integer $timeout An optional time to wait for data
* @return boolean True for data available, false otherwise
*/
public function dataAvailable($timeout = 0) {
$readFds = array($this->_input);
$readyFds = stream_select($readFds, $writeFds, $errorFds, $timeout);
return ($readyFds > 0);
}
}