<?php

/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Gdata
 * @subpackage App
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/**
 * @see Zend_Gdata_App_MediaSource
 */
require_once 'Zend/Gdata/App/MediaSource.php';

/**
 * Concrete class to use a file handle as an attachment within a MediaEntry.
 *
 * @category   Zend
 * @package    Zend_Gdata
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
abstract class Zend_Gdata_App_BaseMediaSource implements Zend_Gdata_App_MediaSource
{

    /**
     * The content type for the attached file (example image/png)
     *
     * @var string
     */
    protected $_contentType = null;

    /**
     * The slug header value representing the attached file title, or null if
     * no slug should be used.  The slug header is only necessary in some cases,
     * usually when a multipart upload is not being performed.
     *
     * @var string
     */
    protected $_slug = null;
    
    /** 
     * The content type for the attached file (example image/png)
     *
     * @return string The content type
     */
    public function getContentType()
    {
        return $this->_contentType;
    }

    /** 
     * Set the content type for the file attached (example image/png)
     *
     * @param string $value The content type
     * @return Zend_Gdata_App_MediaFileSource Provides a fluent interface
     */
    public function setContentType($value)
    {
        $this->_contentType = $value;
        return $this;
    }

    /**
     * Returns the Slug header value.  Used by some services to determine the 
     * title for the uploaded file.  Returns null if no slug should be used.
     *
     * @return string
     */
    public function getSlug(){
        return $this->_slug;
    }

    /**
     * Sets the Slug header value.  Used by some services to determine the 
     * title for the uploaded file.  A null value indicates no slug header.
     *
     * @var string The slug value
     * @return Zend_Gdata_App_MediaSource Provides a fluent interface
     */
    public function setSlug($value){
        $this->_slug = $value;
        return $this;
    }


    /**
     * Magic getter to allow acces like $source->foo to call $source->getFoo()
     * Alternatively, if no getFoo() is defined, but a $_foo protected variable
     * is defined, this is returned.
     *
     * TODO Remove ability to bypass getFoo() methods??
     *
     * @param string $name The variable name sought
     */
    public function __get($name)
    {
        $method = 'get'.ucfirst($name);
        if (method_exists($this, $method)) {
            return call_user_func(array(&$this, $method));
        } else if (property_exists($this, "_${name}")) {
            return $this->{'_' . $name};
        } else {
            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
            throw new Zend_Gdata_App_InvalidArgumentException(
                    'Property ' . $name . ' does not exist');
        }
    }

    /**
     * Magic setter to allow acces like $source->foo='bar' to call
     * $source->setFoo('bar') automatically.
     *
     * Alternatively, if no setFoo() is defined, but a $_foo protected variable
     * is defined, this is returned.
     *
     * @param string $name
     * @param string $value
     */
    public function __set($name, $val)
    {
        $method = 'set'.ucfirst($name);
        if (method_exists($this, $method)) {
            return call_user_func(array(&$this, $method), $val);
        } else if (isset($this->{'_' . $name}) || is_null($this->{'_' . $name})) {
            $this->{'_' . $name} = $val;
        } else {
            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
            throw new Zend_Gdata_App_InvalidArgumentException(
                    'Property ' . $name . '  does not exist');
        }
    }

    /**
     * Magic __isset method
     *
     * @param string $name
     */
    public function __isset($name)
    {
        $rc = new ReflectionClass(get_class($this));
        $privName = '_' . $name;
        if (!($rc->hasProperty($privName))) {
            require_once 'Zend/Gdata/App/InvalidArgumentException.php';
            throw new Zend_Gdata_App_InvalidArgumentException(
                    'Property ' . $name . ' does not exist');
        } else {
            if (isset($this->{$privName})) {
                if (is_array($this->{$privName})) {
                    if (count($this->{$privName}) > 0) {
                        return true;
                    } else {
                        return false;
                    }
                } else {
                    return true;
                }
            } else {
                return false;
            }
        }
    }
    
}
