From a366ee01ef9b0b3af60d37a91a5fe9108c8e447c Mon Sep 17 00:00:00 2001
From: ryan <ryan@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Fri, 21 Sep 2007 18:34:28 +0000
Subject: [PATCH] Export and import of post tags. fixes #4682

git-svn-id: http://svn.automattic.com/wordpress/trunk@6149 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-admin/export.php           | 23 ++++++++++++++++++++++-
 wp-admin/import/wordpress.php | 28 ++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/wp-admin/export.php b/wp-admin/export.php
index 27fbe523b..c8090e4dd 100644
--- a/wp-admin/export.php
+++ b/wp-admin/export.php
@@ -141,6 +141,27 @@ function wxr_tag_description($t) {
 	echo '<wp:tag_description>' . wxr_cdata($t->description) . '</wp:tag_description>';
 }
 
+function wxr_post_taxonomy() {
+	$categories = get_the_category();
+	$tags = get_the_tags();
+	$cat_names = array();
+	$tag_names = array();
+	$the_list = '';
+	$filter = 'rss';
+
+	if ( !empty($categories) ) foreach ( (array) $categories as $category ) {
+		$cat_name = sanitize_term_field('name', $category->name, $category->term_id, 'category', $filter);
+		$the_list .= "\n\t\t<category><![CDATA[$cat_name]]></category>\n";
+	}
+
+	if ( !empty($tags) ) foreach ( (array) $tags as $tag ) {
+		$tag_name = sanitize_term_field('name', $tag->name, $tag->term_id, 'post_tag', $filter);
+		$the_list .= "\n\t\t<category domain=\"tag\"><![CDATA[$tag_name]]></category>\n";
+	}
+
+	echo $the_list;
+}
+
 print '<?xml version="1.0" encoding="' . get_bloginfo('charset') . '"?' . ">\n";
 
 ?>
@@ -201,7 +222,7 @@ print '<?xml version="1.0" encoding="' . get_bloginfo('charset') . '"?' . ">\n";
 <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 the_author() ?></dc:creator>
-<?php the_category_rss() ?>
+<?php wxr_post_taxonomy() ?>
 
 <guid isPermaLink="false"><?php the_guid(); ?></guid>
 <description></description>
diff --git a/wp-admin/import/wordpress.php b/wp-admin/import/wordpress.php
index df1b67bd0..d15f3a43b 100644
--- a/wp-admin/import/wordpress.php
+++ b/wp-admin/import/wordpress.php
@@ -316,6 +316,15 @@ class WP_Import {
 		$post_content = str_replace('<br>', '<br />', $post_content);
 		$post_content = str_replace('<hr>', '<hr />', $post_content);
 
+		preg_match_all('|<category domain="tag">(.*?)</category>|is', $post, $tags);
+		$tags = $tags[1];
+
+		$tag_index = 0;
+		foreach ($tags as $tag) {
+			$tags[$tag_index] = $wpdb->escape($this->unhtmlentities(str_replace(array ('<![CDATA[', ']]>'), '', $tag)));
+			$tag_index++;
+		}
+
 		preg_match_all('|<category>(.*?)</category>|is', $post, $categories);
 		$categories = $categories[1];
 
@@ -372,6 +381,25 @@ class WP_Import {
 				}
 				wp_set_post_categories($post_id, $post_cats);
 			}
+
+			// Add tags.
+			if (count($tags) > 0) {
+				$post_tags = array();
+				foreach ($tags as $tag) {
+					$slug = sanitize_term_field('slug', $tag, 0, 'post_tag', 'db');
+					$tag_obj = get_term_by('slug', $slug, 'post_tag');
+					$tag_id = 0;
+					if ( ! empty($tag_obj) )
+						$tag_id = $tag_obj->term_id;
+					if ( $tag_id == 0 ) {
+						$tag = $wpdb->escape($tag);
+						$tag_id = wp_insert_term($tag, 'post_tag');
+						$tag_id = $tag_id['term_id'];
+					}
+					$post_tags[] = $tag_id;
+				}
+				wp_set_post_tags($post_id, $post_tags);
+			}
 		}
 
 		// Now for comments