292 lines
7 KiB
PHP
292 lines
7 KiB
PHP
<?php
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/**
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* RSS Helper class file.
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*
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* Simplifies the output of RSS feeds.
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.view.helpers
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* @since CakePHP(tm) v 1.2
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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App::import('Helper', 'Xml');
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/**
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* XML Helper class for easy output of XML structures.
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*
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* XmlHelper encloses all methods needed while working with XML documents.
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*
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* @package cake
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* @subpackage cake.cake.libs.view.helpers
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* @link http://book.cakephp.org/view/1460/RSS
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*/
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class RssHelper extends XmlHelper {
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/**
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* Helpers used by RSS Helper
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*
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* @var array
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* @access public
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*/
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var $helpers = array('Time');
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/**
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* Base URL
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*
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* @access public
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* @var string
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*/
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var $base = null;
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/**
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* URL to current action.
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*
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* @access public
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* @var string
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*/
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var $here = null;
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/**
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* Parameter array.
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*
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* @access public
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* @var array
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*/
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var $params = array();
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/**
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* Current action.
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*
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* @access public
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* @var string
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*/
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var $action = null;
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/**
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* POSTed model data
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*
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* @access public
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* @var array
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*/
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var $data = null;
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/**
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* Name of the current model
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*
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* @access public
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* @var string
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*/
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var $model = null;
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/**
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* Name of the current field
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*
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* @access public
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* @var string
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*/
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var $field = null;
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/**
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* Default spec version of generated RSS
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*
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* @access public
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* @var string
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*/
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var $version = '2.0';
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/**
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* Returns an RSS document wrapped in `<rss />` tags
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*
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* @param array $attrib `<rss />` tag attributes
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* @return string An RSS document
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* @access public
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*/
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function document($attrib = array(), $content = null) {
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if ($content === null) {
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$content = $attrib;
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$attrib = array();
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}
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if (!isset($attrib['version']) || empty($attrib['version'])) {
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$attrib['version'] = $this->version;
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}
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return $this->elem('rss', $attrib, $content);
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}
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/**
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* Returns an RSS `<channel />` element
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*
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* @param array $attrib `<channel />` tag attributes
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* @param mixed $elements Named array elements which are converted to tags
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* @param mixed $content Content (`<item />`'s belonging to this channel
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* @return string An RSS `<channel />`
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* @access public
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*/
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function channel($attrib = array(), $elements = array(), $content = null) {
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$view =& ClassRegistry::getObject('view');
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if (!isset($elements['title']) && !empty($view->pageTitle)) {
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$elements['title'] = $view->pageTitle;
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}
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if (!isset($elements['link'])) {
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$elements['link'] = '/';
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}
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if (!isset($elements['description'])) {
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$elements['description'] = '';
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}
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$elements['link'] = $this->url($elements['link'], true);
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$elems = '';
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foreach ($elements as $elem => $data) {
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$attributes = array();
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if (is_array($data)) {
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if (strtolower($elem) == 'cloud') {
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$attributes = $data;
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$data = array();
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} elseif (isset($data['attrib']) && is_array($data['attrib'])) {
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$attributes = $data['attrib'];
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unset($data['attrib']);
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} else {
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$innerElements = '';
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foreach ($data as $subElement => $value) {
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$innerElements .= $this->elem($subElement, array(), $value);
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}
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$data = $innerElements;
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}
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}
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$elems .= $this->elem($elem, $attributes, $data);
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}
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return $this->elem('channel', $attrib, $elems . $content, !($content === null));
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}
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/**
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* Transforms an array of data using an optional callback, and maps it to a set
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* of `<item />` tags
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*
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* @param array $items The list of items to be mapped
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* @param mixed $callback A string function name, or array containing an object
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* and a string method name
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* @return string A set of RSS `<item />` elements
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* @access public
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*/
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function items($items, $callback = null) {
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if ($callback != null) {
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$items = array_map($callback, $items);
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}
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$out = '';
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$c = count($items);
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for ($i = 0; $i < $c; $i++) {
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$out .= $this->item(array(), $items[$i]);
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}
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return $out;
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}
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/**
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* Converts an array into an `<item />` element and its contents
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*
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* @param array $attrib The attributes of the `<item />` element
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* @param array $elements The list of elements contained in this `<item />`
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* @return string An RSS `<item />` element
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* @access public
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*/
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function item($att = array(), $elements = array()) {
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$content = null;
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if (isset($elements['link']) && !isset($elements['guid'])) {
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$elements['guid'] = $elements['link'];
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}
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foreach ($elements as $key => $val) {
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$attrib = array();
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$escape = true;
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if (is_array($val) && isset($val['convertEntities'])) {
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$escape = $val['convertEntities'];
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unset($val['convertEntities']);
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}
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switch ($key) {
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case 'pubDate' :
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$val = $this->time($val);
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break;
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case 'category' :
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if (is_array($val) && !empty($val[0])) {
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foreach ($val as $category) {
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$attrib = array();
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if (isset($category['domain'])) {
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$attrib['domain'] = $category['domain'];
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unset($category['domain']);
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}
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$categories[] = $this->elem($key, $attrib, $category);
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}
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$elements[$key] = implode('', $categories);
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continue 2;
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} else if (is_array($val) && isset($val['domain'])) {
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$attrib['domain'] = $val['domain'];
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}
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break;
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case 'link':
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case 'guid':
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case 'comments':
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if (is_array($val) && isset($val['url'])) {
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$attrib = $val;
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unset($attrib['url']);
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$val = $val['url'];
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}
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$val = $this->url($val, true);
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break;
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case 'source':
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if (is_array($val) && isset($val['url'])) {
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$attrib['url'] = $this->url($val['url'], true);
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$val = $val['title'];
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} elseif (is_array($val)) {
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$attrib['url'] = $this->url($val[0], true);
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$val = $val[1];
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}
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break;
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case 'enclosure':
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if (is_string($val['url']) && is_file(WWW_ROOT . $val['url']) && file_exists(WWW_ROOT . $val['url'])) {
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if (!isset($val['length']) && strpos($val['url'], '://') === false) {
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$val['length'] = sprintf("%u", filesize(WWW_ROOT . $val['url']));
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}
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if (!isset($val['type']) && function_exists('mime_content_type')) {
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$val['type'] = mime_content_type(WWW_ROOT . $val['url']);
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}
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}
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$val['url'] = $this->url($val['url'], true);
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$attrib = $val;
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$val = null;
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break;
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}
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if (!is_null($val) && $escape) {
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$val = h($val);
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}
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$elements[$key] = $this->elem($key, $attrib, $val);
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}
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if (!empty($elements)) {
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$content = implode('', $elements);
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}
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return $this->elem('item', $att, $content, !($content === null));
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}
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/**
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* Converts a time in any format to an RSS time
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*
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* @param mixed $time
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* @return string An RSS-formatted timestamp
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* @see TimeHelper::toRSS
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*/
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function time($time) {
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return $this->Time->toRSS($time);
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}
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}
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