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Diffstat (limited to 'kohana/helpers/feed.php')
| -rw-r--r-- | kohana/helpers/feed.php | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/kohana/helpers/feed.php b/kohana/helpers/feed.php new file mode 100644 index 00000000..2049c7bd --- /dev/null +++ b/kohana/helpers/feed.php @@ -0,0 +1,116 @@ +<?php defined('SYSPATH') or die('No direct script access.'); +/** + * Feed helper class. + * + * $Id$ + * + * @package Core + * @author Kohana Team + * @copyright (c) 2007-2008 Kohana Team + * @license http://kohanaphp.com/license.html + */ +class feed_Core { + + /** + * Parses a remote feed into an array. + * + * @param string remote feed URL + * @param integer item limit to fetch + * @return array + */ + public static function parse($feed, $limit = 0) + { + // Make limit an integer + $limit = (int) $limit; + + // Disable error reporting while opening the feed + $ER = error_reporting(0); + + // Allow loading by filename or raw XML string + $load = (is_file($feed) OR valid::url($feed)) ? 'simplexml_load_file' : 'simplexml_load_string'; + + // Load the feed + $feed = $load($feed, 'SimpleXMLElement', LIBXML_NOCDATA); + + // Restore error reporting + error_reporting($ER); + + // Feed could not be loaded + if ($feed === FALSE) + return array(); + + // Detect the feed type. RSS 1.0/2.0 and Atom 1.0 are supported. + $feed = isset($feed->channel) ? $feed->xpath('//item') : $feed->entry; + + $i = 0; + $items = array(); + + foreach ($feed as $item) + { + if ($limit > 0 AND $i++ === $limit) + break; + + $items[] = (array) $item; + } + + return $items; + } + + /** + * Creates a feed from the given parameters. + * + * @param array feed information + * @param array items to add to the feed + * @return string + */ + public static function create($info, $items, $format = 'rss2') + { + $info += array('title' => 'Generated Feed', 'link' => '', 'generator' => 'KohanaPHP'); + + $feed = '<?xml version="1.0"?><rss version="2.0"><channel></channel></rss>'; + $feed = simplexml_load_string($feed); + + foreach ($info as $name => $value) + { + if (($name === 'pubDate' OR $name === 'lastBuildDate') AND (is_int($value) OR ctype_digit($value))) + { + // Convert timestamps to RFC 822 formatted dates + $value = date(DATE_RFC822, $value); + } + elseif (($name === 'link' OR $name === 'docs') AND strpos($value, '://') === FALSE) + { + // Convert URIs to URLs + $value = url::site($value, 'http'); + } + + // Add the info to the channel + $feed->channel->addChild($name, $value); + } + + foreach ($items as $item) + { + // Add the item to the channel + $row = $feed->channel->addChild('item'); + + foreach ($item as $name => $value) + { + if ($name === 'pubDate' AND (is_int($value) OR ctype_digit($value))) + { + // Convert timestamps to RFC 822 formatted dates + $value = date(DATE_RFC822, $value); + } + elseif (($name === 'link' OR $name === 'guid') AND strpos($value, '://') === FALSE) + { + // Convert URIs to URLs + $value = url::site($value, 'http'); + } + + // Add the info to the row + $row->addChild($name, $value); + } + } + + return $feed->asXML(); + } + +} // End feed
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