<?php

/**

 * RSS Importer

 *

 * @package WordPress

 * @subpackage Importer

 */

/**

 * RSS Importer

 *

 * Will process a RSS feed for importing posts into WordPress. This is a very

 * limited importer and should only be used as the last resort, when no other

 * importer is available.

 *

 * @since unknown

 */

class RSS_Import {

	var $posts = array ();

	var $file;

	function header() {

		echo '<div class="wrap">';

		screen_icon();

		echo '<h2>'.__('Import RSS').'</h2>';

	}

	function footer() {

		echo '</div>';

	}

	function unhtmlentities($string) { // From php.net for < 4.3 compat

		$trans_tbl = get_html_translation_table(HTML_ENTITIES);

		$trans_tbl = array_flip($trans_tbl);

		return strtr($string, $trans_tbl);

	}

	function greet() {

		echo '<div class="narrow">';

		echo '<p>'.__('Howdy! This importer allows you to extract posts from an RSS 2.0 file into your blog. This is useful if you want to import your posts from a system that is not handled by a custom import tool. Pick an RSS file to upload and click Import.').'</p>';

		wp_import_upload_form("admin.php?import=rss&step=1");

		echo '</div>';

	}

	function _normalize_tag( $matches ) {

		return '<' . strtolower( $matches[1] );

	}

	function get_posts() {

		global $wpdb;

		set_magic_quotes_runtime(0);

		$datalines = file($this->file); // Read the file into an array

		$importdata = implode('', $datalines); // squish it

		$importdata = str_replace(array ("\r\n", "\r"), "\n", $importdata);

		preg_match_all('|<item>(.*?)</item>|is', $importdata, $this->posts);

		$this->posts = $this->posts[1];

		$index = 0;

		foreach ($this->posts as $post) {

			preg_match('|<title>(.*?)</title>|is', $post, $post_title);

			$post_title = str_replace(array('<![CDATA[', ']]>'), '', $wpdb->escape( trim($post_title[1]) ));

			preg_match('|<pubdate>(.*?)</pubdate>|is', $post, $post_date_gmt);

			if ($post_date_gmt) {

				$post_date_gmt = strtotime($post_date_gmt[1]);

			} else {

				// if we don't already have something from pubDate

				preg_match('|<dc:date>(.*?)</dc:date>|is', $post, $post_date_gmt);

				$post_date_gmt = preg_replace('|([-+])([0-9]+):([0-9]+)$|', '\1\2\3', $post_date_gmt[1]);

				$post_date_gmt = str_replace('T', ' ', $post_date_gmt);

				$post_date_gmt = strtotime($post_date_gmt);

			}

			$post_date_gmt = gmdate('Y-m-d H:i:s', $post_date_gmt);

			$post_date = get_date_from_gmt( $post_date_gmt );

			preg_match_all('|<category>(.*?)</category>|is', $post, $categories);

			$categories = $categories[1];

			if (!$categories) {

				preg_match_all('|<dc:subject>(.*?)</dc:subject>|is', $post, $categories);

				$categories = $categories[1];

			}

			$cat_index = 0;

			foreach ($categories as $category) {

				$categories[$cat_index] = $wpdb->escape($this->unhtmlentities($category));

				$cat_index++;

			}

			preg_match('|<guid.*?>(.*?)</guid>|is', $post, $guid);

			if ($guid)

				$guid = $wpdb->escape(trim($guid[1]));

			else

				$guid = '';

			preg_match('|<content:encoded>(.*?)</content:encoded>|is', $post, $post_content);

			$post_content = str_replace(array ('<![CDATA[', ']]>'), '', $wpdb->escape(trim($post_content[1])));

			if (!$post_content) {

				// This is for feeds that put content in description

				preg_match('|<description>(.*?)</description>|is', $post, $post_content);

				$post_content = $wpdb->escape($this->unhtmlentities(trim($post_content[1])));

			}

			// Clean up content

			$post_content = preg_replace_callback('|<(/?[A-Z]+)|', array( &$this, '_normalize_tag' ), $post_content);

			$post_content = str_replace('<br>', '<br />', $post_content);

			$post_content = str_replace('<hr>', '<hr />', $post_content);

			$post_author = 1;

			$post_status = 'publish';

			$this->posts[$index] = compact('post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_title', 'post_status', 'guid', 'categories');

			$index++;

		}

	}

	function import_posts() {

		echo '<ol>';

		foreach ($this->posts as $post) {

			echo "<li>".__('Importing post...');

			extract($post);

			if ($post_id = post_exists($post_title, $post_content, $post_date)) {

				_e('Post already imported');

			} else {

				$post_id = wp_insert_post($post);

				if ( is_wp_error( $post_id ) )

					return $post_id;

				if (!$post_id) {

					_e('Couldn’t get post ID');

					return;

				}

				if (0 != count($categories))

					wp_create_categories($categories, $post_id);

				_e('Done !');

			}

			echo '</li>';

		}

		echo '</ol>';

	}

	function import() {

		$file = wp_import_handle_upload();

		if ( isset($file['error']) ) {

			echo $file['error'];

			return;

		}

		$this->file = $file['file'];

		$this->get_posts();

		$result = $this->import_posts();

		if ( is_wp_error( $result ) )

			return $result;

		wp_import_cleanup($file['id']);

		do_action('import_done', 'rss');

		echo '<h3>';

		printf(__('All done. <a href="%s">Have fun!</a>'), get_option('home'));

		echo '</h3>';

	}

	function dispatch() {

		if (empty ($_GET['step']))

			$step = 0;

		else

			$step = (int) $_GET['step'];

		$this->header();

		switch ($step) {

			case 0 :

				$this->greet();

				break;

			case 1 :

				check_admin_referer('import-upload');

				$result = $this->import();

				if ( is_wp_error( $result ) )

					echo $result->get_error_message();

				break;

		}

		$this->footer();

	}

	function RSS_Import() {

		// Nothing.

	}

}

$rss_import = new RSS_Import();

register_importer('rss', __('RSS'), __('Import posts from an RSS feed.'), array ($rss_import, 'dispatch'));

?>