pictcode / lib / Cake / Console / ConsoleInput.php @ master
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| 1 | 635eef61 | spyder1211 | <?php
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| 2 | /**
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| 3 | * ConsoleInput file.
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| 4 | *
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| 5 | * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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| 6 | * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 7 | *
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| 8 | * Licensed under The MIT License
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| 9 | * For full copyright and license information, please see the LICENSE.txt
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| 10 | * Redistributions of files must retain the above copyright notice.
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| 11 | *
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| 12 | * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 13 | * @link http://cakephp.org CakePHP(tm) Project
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| 14 | * @package Cake.Console
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| 15 | * @since CakePHP(tm) v 2.0
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| 16 | * @license http://www.opensource.org/licenses/mit-license.php MIT License
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| 17 | */
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| 18 | |||
| 19 | /**
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| 20 | * Object wrapper for interacting with stdin
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| 21 | *
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| 22 | * @package Cake.Console
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| 23 | */
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| 24 | class ConsoleInput { |
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| 25 | |||
| 26 | /**
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| 27 | * Input value.
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| 28 | *
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| 29 | * @var resource
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| 30 | */
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| 31 | protected $_input; |
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| 32 | |||
| 33 | /**
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| 34 | * Can this instance use readline?
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| 35 | * Two conditions must be met:
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| 36 | * 1. Readline support must be enabled.
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| 37 | * 2. Handle we are attached to must be stdin.
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| 38 | * Allows rich editing with arrow keys and history when inputting a string.
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| 39 | *
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| 40 | * @var bool
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| 41 | */
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| 42 | protected $_canReadline; |
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| 43 | |||
| 44 | /**
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| 45 | * Constructor
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| 46 | *
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| 47 | * @param string $handle The location of the stream to use as input.
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| 48 | */
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| 49 | public function __construct($handle = 'php://stdin') { |
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| 50 | $this->_canReadline = extension_loaded('readline') && $handle === 'php://stdin' ? true : false; |
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| 51 | $this->_input = fopen($handle, 'r'); |
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| 52 | } |
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| 53 | |||
| 54 | /**
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| 55 | * Read a value from the stream
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| 56 | *
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| 57 | * @return mixed The value of the stream
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| 58 | */
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| 59 | public function read() { |
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| 60 | if ($this->_canReadline) { |
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| 61 | $line = readline(''); |
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| 62 | if (!empty($line)) { |
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| 63 | readline_add_history($line);
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| 64 | } |
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| 65 | return $line; |
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| 66 | } |
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| 67 | return fgets($this->_input); |
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| 68 | } |
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| 69 | |||
| 70 | /**
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| 71 | * Checks if data is available on the stream
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| 72 | *
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| 73 | * @param int $timeout An optional time to wait for data
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| 74 | * @return bool True for data available, false otherwise
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| 75 | */
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| 76 | public function dataAvailable($timeout = 0) { |
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| 77 | $readFds = array($this->_input); |
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| 78 | $readyFds = stream_select($readFds, $writeFds, $errorFds, $timeout); |
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| 79 | return ($readyFds > 0); |
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| 80 | } |
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| 81 | |||
| 82 | } |