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<?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_Service
* @subpackage Delicious
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: PostList.php 16211 2009-06-21 19:23:55Z thomas $
*/
/**
* List of posts retrived from the del.icio.us web service
*
* @category Zend
* @package Zend_Service
* @subpackage Delicious
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Service_Delicious_PostList implements Countable, Iterator, ArrayAccess
{
/**
* @var array Array of Zend_Service_Delicious_Post
*/
protected $_posts = array();
/**
* @var Zend_Service_Delicious Service that has downloaded the post list
*/
protected $_service;
/**
* @var int Iterator key
*/
protected $_iteratorKey = 0;
/**
* @param Zend_Service_Delicious $service Service that has downloaded the post
* @param DOMNodeList|array $posts
* @return void
*/
public function __construct(Zend_Service_Delicious $service, $posts = null)
{
$this->_service = $service;
if ($posts instanceof DOMNodeList) {
$this->_constructFromNodeList($posts);
} else if (is_array($posts)) {
$this->_constructFromArray($posts);
}
}
/**
* Transforms DOMNodeList to array of posts
*
* @param DOMNodeList $nodeList
* @return void
*/
private function _constructFromNodeList(DOMNodeList $nodeList)
{
for ($i = 0; $i < $nodeList->length; $i++) {
$curentNode = $nodeList->item($i);
if($curentNode->nodeName == 'post') {
$this->_addPost(new Zend_Service_Delicious_Post($this->_service, $curentNode));
}
}
}
/**
* Transforms the Array to array of posts
*
* @param array $postList
* @return void
*/
private function _constructFromArray(array $postList)
{
foreach ($postList as $f_post) {
$this->_addPost(new Zend_Service_Delicious_SimplePost($f_post));
}
}
/**
* Add a post
*
* @param Zend_Service_Delicious_SimplePost $post
* @return Zend_Service_Delicious_PostList
*/
protected function _addPost(Zend_Service_Delicious_SimplePost $post)
{
$this->_posts[] = $post;
return $this;
}
/**
* Filter list by list of tags
*
* @param array $tags
* @return Zend_Service_Delicious_PostList
*/
public function withTags(array $tags)
{
$postList = new self($this->_service);
foreach ($this->_posts as $post) {
if (count(array_diff($tags, $post->getTags())) == 0) {
$postList->_addPost($post);
}
}
return $postList;
}
/**
* Filter list by tag
*
* @param string $tag
* @return Zend_Service_Delicious_PostList
*/
public function withTag($tag)
{
return $this->withTags(func_get_args());
}
/**
* Filter list by urls matching a regular expression
*
* @param string $regexp
* @return Zend_Service_Delicious_PostList
*/
public function withUrl($regexp)
{
$postList = new self($this->_service);
foreach ($this->_posts as $post) {
if (preg_match($regexp, $post->getUrl())) {
$postList->_addPost($post);
}
}
return $postList;
}
/**
* Return number of posts
*
* Implement Countable::count()
*
* @return int
*/
public function count()
{
return count($this->_posts);
}
/**
* Return the current element
*
* Implement Iterator::current()
*
* @return Zend_Service_Delicious_SimplePost
*/
public function current()
{
return $this->_posts[$this->_iteratorKey];
}
/**
* Return the key of the current element
*
* Implement Iterator::key()
*
* @return int
*/
public function key()
{
return $this->_iteratorKey;
}
/**
* Move forward to next element
*
* Implement Iterator::next()
*
* @return void
*/
public function next()
{
$this->_iteratorKey += 1;
}
/**
* Rewind the Iterator to the first element
*
* Implement Iterator::rewind()
*
* @return void
*/
public function rewind()
{
$this->_iteratorKey = 0;
}
/**
* Check if there is a current element after calls to rewind() or next()
*
* Implement Iterator::valid()
*
* @return bool
*/
public function valid()
{
$numItems = $this->count();
if ($numItems > 0 && $this->_iteratorKey < $numItems) {
return true;
} else {
return false;
}
}
/**
* Whether the offset exists
*
* Implement ArrayAccess::offsetExists()
*
* @param int $offset
* @return bool
*/
public function offsetExists($offset)
{
return ($offset < $this->count());
}
/**
* Return value at given offset
*
* Implement ArrayAccess::offsetGet()
*
* @param int $offset
* @throws OutOfBoundsException
* @return Zend_Service_Delicious_SimplePost
*/
public function offsetGet($offset)
{
if ($this->offsetExists($offset)) {
return $this->_posts[$offset];
} else {
throw new OutOfBoundsException('Illegal index');
}
}
/**
* Throws exception because all values are read-only
*
* Implement ArrayAccess::offsetSet()
*
* @param int $offset
* @param string $value
* @throws Zend_Service_Delicious_Exception
*/
public function offsetSet($offset, $value)
{
/**
* @see Zend_Service_Delicious_Exception
*/
require_once 'Zend/Service/Delicious/Exception.php';
throw new Zend_Service_Delicious_Exception('You are trying to set read-only property');
}
/**
* Throws exception because all values are read-only
*
* Implement ArrayAccess::offsetUnset()
*
* @param int $offset
* @throws Zend_Service_Delicious_Exception
*/
public function offsetUnset($offset)
{
/**
* @see Zend_Service_Delicious_Exception
*/
require_once 'Zend/Service/Delicious/Exception.php';
throw new Zend_Service_Delicious_Exception('You are trying to unset read-only property');
}
}
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