Patch for shareadraft to add a box to the post edit page

gistfile1.diff

diff --git a/shareadraft.php b/shareadraft.php
index 4db1751..8fd329e 100644
--- a/shareadraft.php
+++ b/shareadraft.php
@@ -23,7 +23,8 @@ class ShareADraft                {
 		add_action('admin_menu', array($this, 'add_admin_pages'));
 		add_filter('the_posts', array($this, 'the_posts_intercept'));
 		add_filter('posts_results', array($this, 'posts_results_intercept'));
-
+                add_action('add_meta_boxes', array($this, 'add_meta_boxes'));
+                add_action('save_post', array($this, 'save_postdata'));
 		$this->admin_options = $this->get_admin_options();
 		$this->admin_options = $this->clear_expired($this->admin_options);
 		$this->user_options = ($current_user->id > 0 && isset($this->admin_options[$current_user->id]))? $this->admin_options[$current_user->id] : array();
@@ -411,6 +412,56 @@ SELECT;
 	</script>
 <?php
 	}
+
+        function add_meta_boxes() {
+		add_meta_box('shareadraft',
+			     __('Share a Draft', 'shareadraft'),
+			     array($this, 'shareadraft_custom_box'),
+			     'post');
+	}
+
+	function shareadraft_custom_box($post) {
+		if ($post->status == "publish") {
+			echo _e('The post is published!', 'shareadraft');
+			return;
+		}
+
+		wp_nonce_field(plugin_basename(__FILE__), 'shareadraft_nonce' );
+		$shared = $this->get_shared();
+		$found = null;
+		foreach ($shared as $share) {
+			if ($share['id'] == $post->ID) {
+				$found = $share;
+				break;
+			}
+		}
+		if ($found) {
+			echo '<label for="shareadraft_link">';
+			_e("Link", 'shareadraft' );
+			echo '</label> ';
+			$url = get_bloginfo('url') . '/?p=' . $post->ID . '&shareadraft='. $found['key'];
+			echo '<input name="shareadraft_link" value="' . esc_url($url) . '" /><br />';
+			echo _e('Expires after', 'shareadraft') . ': ' . $this->friendly_delta($found['expires'] - time()) . '<br />';
+		} else {
+			echo $this->tmpl_measure_select();
+			echo '<input type="submit" name="shareadraft_submit" value="' . __('Share a Draft', 'shareadraft') . '" class="button shareadraft" />';
+		}
+	}
+	
+        function save_postdata() {
+		// check if this isn't an auto save
+		if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
+			return;
+
+		// security check
+		if ( !wp_verify_nonce( $_POST['shareadraft_nonce'], plugin_basename( __FILE__ ) ) )
+			return;
+		if ($_POST['shareadraft_submit']) {
+			$this->process_post_options(array('post_id' => $_POST['post_ID'],
+							  'expires' => $_POST['expires'],
+							  'measure' => $_POST['measure']));
+		}
+        }
 }
 endif;