<?php

/**
 *  @author      Ben XO (me@ben-xo.com)
 *  @copyright   Copyright (c) 2010 Ben XO
 *  @license     MIT License (http://www.opensource.org/licenses/mit-license.html)
 *  
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *  
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 *  
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *  THE SOFTWARE.
 */

/**
 * Handler designed to accept keyboard commands to allow SSL to be quit
 * gracefully from the console, for example when Ctrl-C isn't graceful
 * because your PHP doesn't have the PCNTL extension present.
 * 
 * NOTE: this is NOT cross platform because PHP on Windows sucks. So,
 * this is not active by default.
 * 
 * @author ben
 */
class InputHandler
{
    protected $should_exit = false;
    
    public function install()
    {
        stream_set_blocking(STDIN, 0);
    }
    
    public function process()
    {
        $this->clear();
        $buffer = array();
        while(($char = fgetc(STDIN)) !== false)
        {
            switch($char)
            {
                case 'x':
                case 'X':
                    $this->should_exit = true;
                    break;
                    
                default:
            }
        }
    }
    
    public function shouldExit()
    {
        return $this->should_exit;
    }
    
    protected function clear()
    {
        $this->should_exit = false;
    }
    
    public function close()
    {
        fclose($this->fp);
    }
}