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pictcode_admin / lib / Cake / Console / ConsoleInput.php @ 5ad38a95

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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 bool
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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 int $timeout An optional time to wait for data
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 * @return bool True for data available, false otherwise
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 */
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        public function dataAvailable($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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}