<?php

/**

 * WordPress Export Administration API

 *

 * @package WordPress

 * @subpackage Administration

 */

/**

 * Version number for the export format.

 *

 * Bump this when something changes that might affect compatibility.

 *

 * @since 2.5.0

 */

define( 'WXR_VERSION', '1.2' );

/**

 * Generates the WXR export file for download.

 *

 * @since 2.1.0

 *

 * @param array $args Filters defining what should be included in the export.

 */

function export_wp( $args = array() ) {

	global $wpdb, $post;

	$defaults = array( 'content' => 'all', 'author' => false, 'category' => false,

		'start_date' => false, 'end_date' => false, 'status' => false,

	);

	$args = wp_parse_args( $args, $defaults );

	/**

	 * Fires at the beginning of an export, before any headers are sent.

	 *

	 * @since 2.3.0

	 *

	 * @param array $args An array of export arguments.

	 */

	do_action( 'export_wp', $args );

	$sitename = sanitize_key( get_bloginfo( 'name' ) );

	if ( ! empty($sitename) ) $sitename .= '.';

	$filename = $sitename . 'wordpress.' . date( 'Y-m-d' ) . '.xml';

	header( 'Content-Description: File Transfer' );

	header( 'Content-Disposition: attachment; filename=' . $filename );

	header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ), true );

	if ( 'all' != $args['content'] && post_type_exists( $args['content'] ) ) {

		$ptype = get_post_type_object( $args['content'] );

		if ( ! $ptype->can_export )

			$args['content'] = 'post';

		$where = $wpdb->prepare( "{$wpdb->posts}.post_type = %s", $args['content'] );

	} else {

		$post_types = get_post_types( array( 'can_export' => true ) );

		$esses = array_fill( 0, count($post_types), '%s' );

		$where = $wpdb->prepare( "{$wpdb->posts}.post_type IN (" . implode( ',', $esses ) . ')', $post_types );

	}

	if ( $args['status'] && ( 'post' == $args['content'] || 'page' == $args['content'] ) )

		$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_status = %s", $args['status'] );

	else

		$where .= " AND {$wpdb->posts}.post_status != 'auto-draft'";

	$join = '';

	if ( $args['category'] && 'post' == $args['content'] ) {

		if ( $term = term_exists( $args['category'], 'category' ) ) {

			$join = "INNER JOIN {$wpdb->term_relationships} ON ({$wpdb->posts}.ID = {$wpdb->term_relationships}.object_id)";

			$where .= $wpdb->prepare( " AND {$wpdb->term_relationships}.term_taxonomy_id = %d", $term['term_taxonomy_id'] );

		}

	}

	if ( 'post' == $args['content'] || 'page' == $args['content'] ) {

		if ( $args['author'] )

			$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_author = %d", $args['author'] );

		if ( $args['start_date'] )

			$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date >= %s", date( 'Y-m-d', strtotime($args['start_date']) ) );

		if ( $args['end_date'] )

			$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date < %s", date( 'Y-m-d', strtotime('+1 month', strtotime($args['end_date'])) ) );

	}

	// Grab a snapshot of post IDs, just in case it changes during the export.

	$post_ids = $wpdb->get_col( "SELECT ID FROM {$wpdb->posts} $join WHERE $where" );

	/*

	 * Get the requested terms ready, empty unless posts filtered by category

	 * or all content.

	 */

	$cats = $tags = $terms = array();

	if ( isset( $term ) && $term ) {

		$cat = get_term( $term['term_id'], 'category' );

		$cats = array( $cat->term_id => $cat );

		unset( $term, $cat );

	} elseif ( 'all' == $args['content'] ) {

		$categories = (array) get_categories( array( 'get' => 'all' ) );

		$tags = (array) get_tags( array( 'get' => 'all' ) );

		$custom_taxonomies = get_taxonomies( array( '_builtin' => false ) );

		$custom_terms = (array) get_terms( $custom_taxonomies, array( 'get' => 'all' ) );

		// Put categories in order with no child going before its parent.

		while ( $cat = array_shift( $categories ) ) {

			if ( $cat->parent == 0 || isset( $cats[$cat->parent] ) )

				$cats[$cat->term_id] = $cat;

			else

				$categories[] = $cat;

		}

		// Put terms in order with no child going before its parent.

		while ( $t = array_shift( $custom_terms ) ) {

			if ( $t->parent == 0 || isset( $terms[$t->parent] ) )

				$terms[$t->term_id] = $t;

			else

				$custom_terms[] = $t;

		}

		unset( $categories, $custom_taxonomies, $custom_terms );

	}

	/**

	 * Wrap given string in XML CDATA tag.

	 *

	 * @since 2.1.0

	 *

	 * @param string $str String to wrap in XML CDATA tag.

	 * @return string

	 */

	function wxr_cdata( $str ) {

		if ( seems_utf8( $str ) == false )

			$str = utf8_encode( $str );

		// $str = ent2ncr(esc_html($str));

		$str = '<![CDATA[' . str_replace( ']]>', ']]]]><![CDATA[>', $str ) . ']]>';

		return $str;

	}

	/**

	 * Return the URL of the site

	 *

	 * @since 2.5.0

	 *

	 * @return string Site URL.

	 */

	function wxr_site_url() {

		// Multisite: the base URL.

		if ( is_multisite() )

			return network_home_url();

		// WordPress (single site): the blog URL.

		else

			return get_bloginfo_rss( 'url' );

	}

	/**

	 * Output a cat_name XML tag from a given category object

	 *

	 * @since 2.1.0

	 *

	 * @param object $category Category Object

	 */

	function wxr_cat_name( $category ) {

		if ( empty( $category->name ) )

			return;

		echo '<wp:cat_name>' . wxr_cdata( $category->name ) . '</wp:cat_name>';

	}

	/**

	 * Output a category_description XML tag from a given category object

	 *

	 * @since 2.1.0

	 *

	 * @param object $category Category Object

	 */

	function wxr_category_description( $category ) {

		if ( empty( $category->description ) )

			return;

		echo '<wp:category_description>' . wxr_cdata( $category->description ) . '</wp:category_description>';

	}

	/**

	 * Output a tag_name XML tag from a given tag object

	 *

	 * @since 2.3.0

	 *

	 * @param object $tag Tag Object

	 */

	function wxr_tag_name( $tag ) {

		if ( empty( $tag->name ) )

			return;

		echo '<wp:tag_name>' . wxr_cdata( $tag->name ) . '</wp:tag_name>';

	}

	/**

	 * Output a tag_description XML tag from a given tag object

	 *

	 * @since 2.3.0

	 *

	 * @param object $tag Tag Object

	 */

	function wxr_tag_description( $tag ) {

		if ( empty( $tag->description ) )

			return;

		echo '<wp:tag_description>' . wxr_cdata( $tag->description ) . '</wp:tag_description>';

	}

	/**

	 * Output a term_name XML tag from a given term object

	 *

	 * @since 2.9.0

	 *

	 * @param object $term Term Object

	 */

	function wxr_term_name( $term ) {

		if ( empty( $term->name ) )

			return;

		echo '<wp:term_name>' . wxr_cdata( $term->name ) . '</wp:term_name>';

	}

	/**

	 * Output a term_description XML tag from a given term object

	 *

	 * @since 2.9.0

	 *

	 * @param object $term Term Object

	 */

	function wxr_term_description( $term ) {

		if ( empty( $term->description ) )

			return;

		echo '<wp:term_description>' . wxr_cdata( $term->description ) . '</wp:term_description>';

	}

	/**

	 * Output list of authors with posts

	 *

	 * @since 3.1.0

	 *

	 * @param array $post_ids Array of post IDs to filter the query by. Optional.

	 */

	function wxr_authors_list( array $post_ids = null ) {

		global $wpdb;

		if ( !empty( $post_ids ) ) {

			$post_ids = array_map( 'absint', $post_ids );

			$and = 'AND ID IN ( ' . implode( ', ', $post_ids ) . ')';

		} else {

			$and = '';

		}

		$authors = array();

		$results = $wpdb->get_results( "SELECT DISTINCT post_author FROM $wpdb->posts WHERE post_status != 'auto-draft' $and" );

		foreach ( (array) $results as $result )

			$authors[] = get_userdata( $result->post_author );

		$authors = array_filter( $authors );

		foreach ( $authors as $author ) {

			echo "\t<wp:author>";

			echo '<wp:author_id>' . $author->ID . '</wp:author_id>';

			echo '<wp:author_login>' . $author->user_login . '</wp:author_login>';

			echo '<wp:author_email>' . $author->user_email . '</wp:author_email>';

			echo '<wp:author_display_name>' . wxr_cdata( $author->display_name ) . '</wp:author_display_name>';

			echo '<wp:author_first_name>' . wxr_cdata( $author->user_firstname ) . '</wp:author_first_name>';

			echo '<wp:author_last_name>' . wxr_cdata( $author->user_lastname ) . '</wp:author_last_name>';

			echo "</wp:author>\n";

		}

	}

	/**

	 * Ouput all navigation menu terms

	 *

	 * @since 3.1.0

	 */

	function wxr_nav_menu_terms() {

		$nav_menus = wp_get_nav_menus();

		if ( empty( $nav_menus ) || ! is_array( $nav_menus ) )

			return;

		foreach ( $nav_menus as $menu ) {

			echo "\t<wp:term><wp:term_id>{$menu->term_id}</wp:term_id><wp:term_taxonomy>nav_menu</wp:term_taxonomy><wp:term_slug>{$menu->slug}</wp:term_slug>";

			wxr_term_name( $menu );

			echo "</wp:term>\n";

		}

	}

	/**

	 * Output list of taxonomy terms, in XML tag format, associated with a post

	 *

	 * @since 2.3.0

	 */

	function wxr_post_taxonomy() {

		$post = get_post();

		$taxonomies = get_object_taxonomies( $post->post_type );

		if ( empty( $taxonomies ) )

			return;

		$terms = wp_get_object_terms( $post->ID, $taxonomies );

		foreach ( (array) $terms as $term ) {

			echo "\t\t<category domain=\"{$term->taxonomy}\" nicename=\"{$term->slug}\">" . wxr_cdata( $term->name ) . "</category>\n";

		}

	}

	function wxr_filter_postmeta( $return_me, $meta_key ) {

		if ( '_edit_lock' == $meta_key )

			$return_me = true;

		return $return_me;

	}

	add_filter( 'wxr_export_skip_postmeta', 'wxr_filter_postmeta', 10, 2 );

	echo '<?xml version="1.0" encoding="' . get_bloginfo('charset') . "\" ?>\n";

	?>

<!-- This is a WordPress eXtended RSS file generated by WordPress as an export of your site. -->

<!-- It contains information about your site's posts, pages, comments, categories, and other content. -->

<!-- You may use this file to transfer that content from one site to another. -->

<!-- This file is not intended to serve as a complete backup of your site. -->

<!-- To import this information into a WordPress site follow these steps: -->

<!-- 1. Log in to that site as an administrator. -->

<!-- 2. Go to Tools: Import in the WordPress admin panel. -->

<!-- 3. Install the "WordPress" importer from the list. -->

<!-- 4. Activate & Run Importer. -->

<!-- 5. Upload this file using the form provided on that page. -->

<!-- 6. You will first be asked to map the authors in this export file to users -->

<!--    on the site. For each author, you may choose to map to an -->

<!--    existing user on the site or to create a new user. -->

<!-- 7. WordPress will then import each of the posts, pages, comments, categories, etc. -->

<!--    contained in this file into your site. -->

<?php the_generator( 'export' ); ?>

<rss version="2.0"

	xmlns:excerpt="http://wordpress.org/export/<?php echo WXR_VERSION; ?>/excerpt/"

	xmlns:content="http://purl.org/rss/1.0/modules/content/"

	xmlns:wfw="http://wellformedweb.org/CommentAPI/"

	xmlns:dc="http://purl.org/dc/elements/1.1/"

	xmlns:wp="http://wordpress.org/export/<?php echo WXR_VERSION; ?>/"

>

<channel>

	<title><?php bloginfo_rss( 'name' ); ?></title>

	<link><?php bloginfo_rss( 'url' ); ?></link>

	<description><?php bloginfo_rss( 'description' ); ?></description>

	<pubDate><?php echo date( 'D, d M Y H:i:s +0000' ); ?></pubDate>

	<language><?php bloginfo_rss( 'language' ); ?></language>

	<wp:wxr_version><?php echo WXR_VERSION; ?></wp:wxr_version>

	<wp:base_site_url><?php echo wxr_site_url(); ?></wp:base_site_url>

	<wp:base_blog_url><?php bloginfo_rss( 'url' ); ?></wp:base_blog_url>

<?php wxr_authors_list( $post_ids ); ?>

<?php foreach ( $cats as $c ) : ?>

	<wp:category><wp:term_id><?php echo $c->term_id ?></wp:term_id><wp:category_nicename><?php echo $c->slug; ?></wp:category_nicename><wp:category_parent><?php echo $c->parent ? $cats[$c->parent]->slug : ''; ?></wp:category_parent><?php wxr_cat_name( $c ); ?><?php wxr_category_description( $c ); ?></wp:category>

<?php endforeach; ?>

<?php foreach ( $tags as $t ) : ?>

	<wp:tag><wp:term_id><?php echo $t->term_id ?></wp:term_id><wp:tag_slug><?php echo $t->slug; ?></wp:tag_slug><?php wxr_tag_name( $t ); ?><?php wxr_tag_description( $t ); ?></wp:tag>

<?php endforeach; ?>

<?php foreach ( $terms as $t ) : ?>

	<wp:term><wp:term_id><?php echo $t->term_id ?></wp:term_id><wp:term_taxonomy><?php echo $t->taxonomy; ?></wp:term_taxonomy><wp:term_slug><?php echo $t->slug; ?></wp:term_slug><wp:term_parent><?php echo $t->parent ? $terms[$t->parent]->slug : ''; ?></wp:term_parent><?php wxr_term_name( $t ); ?><?php wxr_term_description( $t ); ?></wp:term>

<?php endforeach; ?>

<?php if ( 'all' == $args['content'] ) wxr_nav_menu_terms(); ?>

	<?php

	/** This action is documented in wp-includes/feed-rss2.php */

	do_action( 'rss2_head' );

	?>

<?php if ( $post_ids ) {

	global $wp_query;

	// Fake being in the loop.

	$wp_query->in_the_loop = true;

	// Fetch 20 posts at a time rather than loading the entire table into memory.

	while ( $next_posts = array_splice( $post_ids, 0, 20 ) ) {

	$where = 'WHERE ID IN (' . join( ',', $next_posts ) . ')';

	$posts = $wpdb->get_results( "SELECT * FROM {$wpdb->posts} $where" );

	// Begin Loop.

	foreach ( $posts as $post ) {

		setup_postdata( $post );

		$is_sticky = is_sticky( $post->ID ) ? 1 : 0;

?>

	<item>

		<title><?php

			/** This filter is documented in wp-includes/feed.php */

			echo apply_filters( 'the_title_rss', $post->post_title );

		?></title>

		<link><?php the_permalink_rss() ?></link>

		<pubDate><?php echo mysql2date( 'D, d M Y H:i:s +0000', get_post_time( 'Y-m-d H:i:s', true ), false ); ?></pubDate>

		<dc:creator><?php echo wxr_cdata( get_the_author_meta( 'login' ) ); ?></dc:creator>