Index: wp-admin/import/stp.php
===================================================================
--- wp-admin/import/stp.php	(revision 0)
+++ wp-admin/import/stp.php	(revision 0)
@@ -0,0 +1,198 @@
+<?php
+
+class STP_Import {
+	
+	function header()  {
+		echo '<div class="wrap">';
+		echo '<h2>'.__('Import Simple Tagging').'</h2>';
+		echo '<p>'.__('Steps may take a few minutes depending on the size of your database. Please be patient.').'<br /><br /></p>';
+	}
+
+	function footer() {
+		echo '</div>';
+	}
+
+	function greet() {
+		echo '<div class="narrow">';
+		echo '<p>'.__('Howdy! This imports tags from an existing Simple Tagging 1.6.2 installation into this blog using the new WordPress native tagging structure.').'</p>';
+		echo '<p>'.__('This has not been tested on any other versions of Simple Tagging. Mileage may vary.').'</p>';
+		echo '<p>'.__('To accommodate larger databases for those tag-crazy authors out there, we have made this into an easy 4-step program to help you kick that nasty Simple Tagging habit. Just keep clicking along and we will let you know when you are in the clear!').'</p>';
+		echo '<p><strong>'.__('Don&#8217;t be stupid - backup your database before proceeding!').'</strong></p>';
+		echo '<form action="admin.php?import=stp&amp;step=1" method="post">';
+		wp_nonce_field('import-utw'); 
+		echo '<p class="submit"><input type="submit" name="submit" value="'.__('Step 1 &raquo;').'" /></p>';
+		echo '</form>';
+		echo '</div>';
+	}
+	
+	
+	function dispatch () {
+		if ( empty( $_GET['step'] ) ) {
+			$step = 0;
+		} else {
+			$step = (int) $_GET['step'];
+		}
+		
+		// load the header
+		$this->header();
+		
+		switch ( $step ) {
+			case 0 :
+				$this->greet();
+				break;
+			case 1 :
+				check_admin_referer('import-utw');
+				$this->import_posts();
+				break;
+			case 2:
+				check_admin_referer('import-utw');
+				$this->import_t2p();
+				break;
+			case 3:
+				check_admin_referer('import-utw');
+				$this->cleanup_import();
+				break;
+		}
+		
+		// load the footer
+		$this->footer();
+	}
+	
+	
+	function import_posts ( ) {
+		echo '<div class="narrow">';
+		echo '<p><h3>'.__('Reading STP Post Tags&#8230;').'</h3></p>';
+
+		// read in all the STP tag -> post settings
+		$posts = $this->get_stp_posts();
+
+		// if we didn't get any tags back, that's all there is folks!
+		if ( !is_array($posts) ) {
+			echo '<p>' . __('No posts were found to have tags!') . '</p>';
+			return false;
+		}
+		else {
+
+			// if there's an existing entry, delete it
+			if ( get_option('stpimp_posts') ) {
+				delete_option('stpimp_posts');
+			}
+
+			add_option('stpimp_posts', $posts);
+				
+
+			$count = count($posts);
+				
+			echo '<p>' . sprintf( __('Done! <strong>%s</strong> tag to post relationships were read.'), $count ) . '<br /></p>';
+				
+		}
+
+		echo '<form action="admin.php?import=stp&amp;step=2" method="post">';
+		wp_nonce_field('import-utw'); 
+		echo '<p class="submit"><input type="submit" name="submit" value="'.__('Step 2 &raquo;').'" /></p>';
+		echo '</form>';
+		echo '</div>';
+
+	}
+	
+	
+	function import_t2p ( ) {
+
+		echo '<div class="narrow">';
+		echo '<p><h3>'.__('Adding Tags to Posts&#8230;').'</h3></p>';
+
+		// run that funky magic!
+		$tags_added = $this->tag2post();
+		
+		echo '<p>' . sprintf( __('Done! <strong>%s</strong> tags where added!'), $tags_added ) . '<br /></p>';
+
+		echo '<form action="admin.php?import=stp&amp;step=3" method="post">';
+		wp_nonce_field('import-utw'); 
+		echo '<p class="submit"><input type="submit" name="submit" value="'.__('Step 3 &raquo;').'" /></p>';
+		echo '</form>';
+		echo '</div>';
+
+	}
+	
+	
+	function get_stp_posts ( ) {
+		
+		global $wpdb;
+		
+		// read in all the posts from the STP post->tag table: should be wp_post2tag
+		$posts_query = "SELECT post_id, tag_name FROM " . $wpdb->prefix . "stp_tags";
+		
+		$posts = $wpdb->get_results($posts_query);
+		
+		return $posts;
+		
+	}
+	
+	
+	function tag2post ( ) {
+		
+		// get the tags and posts we imported in the last 2 steps
+		$posts = get_option('stpimp_posts');
+		
+		// null out our results
+		$tags_added = 0;
+		
+		// loop through each post and add its tags to the db
+                foreach ( $posts as $this_post ) {
+                        
+			$the_post = (int) $this_post->post_id;
+                        $the_tag = $this_post->tag_name;
+
+			// try to add the tag
+			wp_add_post_tags($the_post, $the_tag);
+
+			$tags_added++;
+			
+		}
+		
+		// that's it, all posts should be linked to their tags properly, pending any errors we just spit out!
+		return $tags_added;
+		
+		
+	}
+	
+	
+	function cleanup_import ( ) {
+		
+		delete_option('stpimp_posts');
+		
+		$this->done();
+		
+	}
+	
+	
+	function done ( ) {
+		
+		echo '<div class="narrow">';
+		echo '<p><h3>'.__('Import Complete!').'</h3></p>';
+		
+		echo '<p>' . __('OK, so we lied about this being a 4-step program! You&#8217;re done!') . '</p>';
+		
+		echo '<p>' . __('Now wasn&#8217;t that easy?') . '</p>';
+		
+		echo '</div>';
+		
+	}
+	
+
+	function STP_Import ( ) {
+		
+		// Nothing.
+		
+	}
+	
+}
+
+
+// create the import object
+$stp_import = new STP_Import();
+
+// add it to the import page!
+register_importer('stp', 'Simple Tagging', __('Import Simple Tagging tags into the new native tagging structure.'), array($stp_import, 'dispatch'));
+
+?>