Export and import custom taxonomies. Props chrisscott. fixes #10012

git-svn-id: http://svn.automattic.com/wordpress/trunk@12109 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/import/wordpress.php

@@ -27,6 +27,7 @@ class WP_Import {
 	var $author_ids = array ();
 	var $tags = array ();
 	var $categories = array ();
+	var $terms = array ();
 
 	var $j = -1;
 	var $fetch_attachments = false;
@@ -122,6 +123,11 @@ class WP_Import {
 					$this->tags[] = $tag[1];
 					continue;
 				}
+				if ( false !== strpos($importline, '<wp:term>') ) {
+					preg_match('|<wp:term>(.*?)</wp:term>|is', $importline, $term);
+					$this->terms[] = $term[1];
+					continue;
+				}
 				if ( false !== strpos($importline, '<item>') ) {
 					$this->post = '';
 					$doing_entry = true;
@@ -337,6 +343,43 @@ class WP_Import {
 			$tag_ID = wp_insert_term($tag_name, 'post_tag', $tagarr);
 		}
 	}
+	
+	function process_terms() {
+		global $wpdb, $wp_taxonomies;
+		
+		$custom_taxonomies = $wp_taxonomies;
+		// get rid of the standard taxonomies
+		unset( $custom_taxonomies['category'] );
+		unset( $custom_taxonomies['post_tag'] );
+		unset( $custom_taxonomies['link_category'] );
+		
+		$custom_taxonomies = array_keys( $custom_taxonomies );
+		$current_terms = (array) get_terms( $custom_taxonomies, 'get=all' );
+		$taxonomies = array();
+		foreach ( $current_terms as $term ) {
+			if ( isset( $_terms[$term->taxonomy] ) ) {
+				$taxonomies[$term->taxonomy] = array_merge( $taxonomies[$term->taxonomy], array($term->name) );
+			} else {
+				$taxonomies[$term->taxonomy] = array($term->name);
+			}
+		}
+
+		while ( $c = array_shift($this->terms) ) {
+			$term_name = trim($this->get_tag( $c, 'wp:term_name' ));
+			$term_taxonomy = trim($this->get_tag( $c, 'wp:term_taxonomy' ));
+
+			// If the term exists in the taxonomy we leave it alone
+			if ( isset($taxonomies[$term_taxonomy] ) && in_array( $term_name, $taxonomies[$term_taxonomy] ) )
+				continue;
+
+			$slug = $this->get_tag( $c, 'wp:term_slug' );
+			$description = $this->get_tag( $c, 'wp:term_description' );
+
+			$termarr = compact('slug', 'description');
+
+			$term_ID = wp_insert_term($term_name, $this->get_tag( $c, 'wp:term_taxonomy' ), $termarr);
+		}
+	}
 
 	function process_author($post) {
 		$author = $this->get_tag( $post, 'dc:creator' );
@@ -748,6 +791,7 @@ class WP_Import {
 		$this->get_entries();
 		$this->process_categories();
 		$this->process_tags();
+		$this->process_terms();
 		$result = $this->process_posts();
 		wp_suspend_cache_invalidation(false);
 		$this->backfill_parents();

wp-admin/includes/export.php

@@ -24,7 +24,7 @@ define('WXR_VERSION', '1.0');
  * @param unknown_type $author
  */
 function export_wp($author='') {
-global $wpdb, $post_ids, $post;
+global $wpdb, $post_ids, $post, $wp_taxonomies;
 
 do_action('export_wp');
 
@@ -46,6 +46,13 @@ $post_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts $where ORDER BY post_dat
 $categories = (array) get_categories('get=all');
 $tags = (array) get_tags('get=all');
 
+$custom_taxonomies = $wp_taxonomies;
+unset($custom_taxonomies['category']);
+unset($custom_taxonomies['post_tag']);
+unset($custom_taxonomies['link_category']);
+$custom_taxonomies = array_keys($custom_taxonomies);
+$terms = (array) get_terms($custom_taxonomies, 'get=all');
+
 /**
  * {@internal Missing Short Description}}
  *
@@ -182,6 +189,34 @@ function wxr_tag_description($t) {
 	echo '<wp:tag_description>' . wxr_cdata($t->description) . '</wp:tag_description>';
 }
 
+/**
+ * {@internal Missing Short Description}}
+ *
+ * @since unknown
+ *
+ * @param object $t Term Object
+ */
+function wxr_term_name($t) {
+	if ( empty($t->name) )
+		return;
+
+	echo '<wp:term_name>' . wxr_cdata($t->name) . '</wp:term_name>';
+}
+
+/**
+ * {@internal Missing Short Description}}
+ *
+ * @since unknown
+ *
+ * @param object $t Term Object
+ */
+function wxr_term_description($t) {
+	if ( empty($t->description) )
+		return;
+
+	echo '<wp:term_description>' . wxr_cdata($t->description) . '</wp:term_description>';
+}
+
 /**
  * {@internal Missing Short Description}}
  *
@@ -255,6 +290,9 @@ echo '<?xml version="1.0" encoding="' . get_bloginfo('charset') . '"?' . ">\n";
 <?php endforeach; endif; ?>
 <?php if ( $tags ) : foreach ( $tags as $t ) : ?>
 	<wp:tag><wp:tag_slug><?php echo $t->slug; ?></wp:tag_slug><?php wxr_tag_name($t); ?><?php wxr_tag_description($t); ?></wp:tag>
+<?php endforeach; endif; ?>
+<?php if ( $terms ) : foreach ( $terms as $t ) : ?>
+	<wp:term><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 ? $custom_taxonomies[$t->parent]->name : ''; ?></wp:term_parent><?php wxr_term_name($t); ?><?php wxr_term_description($t); ?></wp:term>
 <?php endforeach; endif; ?>
 	<?php do_action('rss2_head'); ?>
 	<?php if ($post_ids) {