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<?php
/**
* RSS Helper class file.
*
* Simplifies the output of RSS feeds.
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.View.Helper
* @since CakePHP(tm) v 1.2
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
App::uses('AppHelper', 'View/Helper');
App::uses('Xml', 'Utility');
/**
* RSS Helper class for easy output RSS structures.
*
* @package Cake.View.Helper
* @property TimeHelper $Time
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/rss.html
*/
class RssHelper extends AppHelper {
/**
* Helpers used by RSS Helper
*
* @var array
*/
public $helpers = array('Time');
/**
* Base URL
*
* @var string
*/
public $base = null;
/**
* URL to current action.
*
* @var string
*/
public $here = null;
/**
* Parameter array.
*
* @var array
*/
public $params = array();
/**
* Current action.
*
* @var string
*/
public $action = null;
/**
* POSTed model data
*
* @var array
*/
public $data = null;
/**
* Name of the current model
*
* @var string
*/
public $model = null;
/**
* Name of the current field
*
* @var string
*/
public $field = null;
/**
* Default spec version of generated RSS
*
* @var string
*/
public $version = '2.0';
/**
* Returns an RSS document wrapped in `<rss />` tags
*
* @param array $attrib `<rss />` tag attributes
* @param string $content
* @return string An RSS document
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/rss.html#RssHelper::document
*/
public function document($attrib = array(), $content = null) {
if ($content === null) {
$content = $attrib;
$attrib = array();
}
if (!isset($attrib['version']) || empty($attrib['version'])) {
$attrib['version'] = $this->version;
}
return $this->elem('rss', $attrib, $content);
}
/**
* Returns an RSS `<channel />` element
*
* @param array $attrib `<channel />` tag attributes
* @param array $elements Named array elements which are converted to tags
* @param string $content Content (`<item />`'s belonging to this channel
* @return string An RSS `<channel />`
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/rss.html#RssHelper::channel
*/
public function channel($attrib = array(), $elements = array(), $content = null) {
if (!isset($elements['title']) && !empty($this->_View->pageTitle)) {
$elements['title'] = $this->_View->pageTitle;
}
if (!isset($elements['link'])) {
$elements['link'] = '/';
}
if (!isset($elements['description'])) {
$elements['description'] = '';
}
$elements['link'] = $this->url($elements['link'], true);
$elems = '';
foreach ($elements as $elem => $data) {
$attributes = array();
if (is_array($data)) {
if (strtolower($elem) == 'cloud') {
$attributes = $data;
$data = array();
} elseif (isset($data['attrib']) && is_array($data['attrib'])) {
$attributes = $data['attrib'];
unset($data['attrib']);
} else {
$innerElements = '';
foreach ($data as $subElement => $value) {
$innerElements .= $this->elem($subElement, array(), $value);
}
$data = $innerElements;
}
}
$elems .= $this->elem($elem, $attributes, $data);
}
return $this->elem('channel', $attrib, $elems . $content, !($content === null));
}
/**
* Transforms an array of data using an optional callback, and maps it to a set
* of `<item />` tags
*
* @param array $items The list of items to be mapped
* @param string|array $callback A string function name, or array containing an object
* and a string method name
* @return string A set of RSS `<item />` elements
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/rss.html#RssHelper::items
*/
public function items($items, $callback = null) {
if ($callback != null) {
$items = array_map($callback, $items);
}
$out = '';
$c = count($items);
for ($i = 0; $i < $c; $i++) {
$out .= $this->item(array(), $items[$i]);
}
return $out;
}
/**
* Converts an array into an `<item />` element and its contents
*
* @param array $att The attributes of the `<item />` element
* @param array $elements The list of elements contained in this `<item />`
* @return string An RSS `<item />` element
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/rss.html#RssHelper::item
*/
public function item($att = array(), $elements = array()) {
$content = null;
if (isset($elements['link']) && !isset($elements['guid'])) {
$elements['guid'] = $elements['link'];
}
foreach ($elements as $key => $val) {
$attrib = array();
$escape = true;
if (is_array($val) && isset($val['convertEntities'])) {
$escape = $val['convertEntities'];
unset($val['convertEntities']);
}
switch ($key) {
case 'pubDate' :
$val = $this->time($val);
break;
case 'category' :
if (is_array($val) && !empty($val[0])) {
foreach ($val as $category) {
$attrib = array();
if (is_array($category) && isset($category['domain'])) {
$attrib['domain'] = $category['domain'];
unset($category['domain']);
}
$categories[] = $this->elem($key, $attrib, $category);
}
$elements[$key] = implode('', $categories);
continue 2;
} elseif (is_array($val) && isset($val['domain'])) {
$attrib['domain'] = $val['domain'];
}
break;
case 'link':
case 'guid':
case 'comments':
if (is_array($val) && isset($val['url'])) {
$attrib = $val;
unset($attrib['url']);
$val = $val['url'];
}
$val = $this->url($val, true);
break;
case 'source':
if (is_array($val) && isset($val['url'])) {
$attrib['url'] = $this->url($val['url'], true);
$val = $val['title'];
} elseif (is_array($val)) {
$attrib['url'] = $this->url($val[0], true);
$val = $val[1];
}
break;
case 'enclosure':
if (is_string($val['url']) && is_file(WWW_ROOT . $val['url']) && file_exists(WWW_ROOT . $val['url'])) {
if (!isset($val['length']) && strpos($val['url'], '://') === false) {
$val['length'] = sprintf("%u", filesize(WWW_ROOT . $val['url']));
}
if (!isset($val['type']) && function_exists('mime_content_type')) {
$val['type'] = mime_content_type(WWW_ROOT . $val['url']);
}
}
$val['url'] = $this->url($val['url'], true);
$attrib = $val;
$val = null;
break;
}
if (!is_null($val) && $escape) {
$val = h($val);
}
$elements[$key] = $this->elem($key, $attrib, $val);
}
if (!empty($elements)) {
$content = implode('', $elements);
}
return $this->elem('item', (array)$att, $content, !($content === null));
}
/**
* Converts a time in any format to an RSS time
*
* @param integer|string|DateTime $time
* @return string An RSS-formatted timestamp
* @see TimeHelper::toRSS
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/rss.html#RssHelper::time
*/
public function time($time) {
return $this->Time->toRSS($time);
}
/**
* Generates an XML element
*
* @param string $name The name of the XML element
* @param array $attrib The attributes of the XML element
* @param string|array $content XML element content
* @param boolean $endTag Whether the end tag of the element should be printed
* @return string XML
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/rss.html#RssHelper::elem
*/
public function elem($name, $attrib = array(), $content = null, $endTag = true) {
$namespace = null;
if (isset($attrib['namespace'])) {
$namespace = $attrib['namespace'];
unset($attrib['namespace']);
}
$cdata = false;
if (is_array($content) && isset($content['cdata'])) {
$cdata = true;
unset($content['cdata']);
}
if (is_array($content) && array_key_exists('value', $content)) {
$content = $content['value'];
}
$children = array();
if (is_array($content)) {
$children = $content;
$content = null;
}
$xml = '<' . $name;
if (!empty($namespace)) {
$xml .= ' xmlns:"' . $namespace . '"';
}
$bareName = $name;
if (strpos($name, ':') !== false) {
list($prefix, $bareName) = explode(':', $name, 2);
switch ($prefix) {
case 'atom':
$xml .= ' xmlns:atom="http://www.w3.org/2005/Atom"';
break;
}
}
if ($cdata && !empty($content)) {
$content = '<![CDATA[' . $content . ']]>';
}
$xml .= '>' . $content . '</' . $name . '>';
$elem = Xml::build($xml, array('return' => 'domdocument'));
$nodes = $elem->getElementsByTagName($bareName);
foreach ($attrib as $key => $value) {
$nodes->item(0)->setAttribute($key, $value);
}
foreach ($children as $k => $child) {
$child = $elem->createElement($name, $child);
$nodes->item(0)->appendChild($child);
}
$xml = $elem->saveXml();
$xml = trim(substr($xml, strpos($xml, '?>') + 2));
return $xml;
}
}
|
