Embeds. Props Viper007Bond. see #10337

git-svn-id: https://develop.svn.wordpress.org/trunk@12023 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/capabilities.php

@@ -959,6 +959,30 @@ function current_user_can( $capability ) {
 	return call_user_func_array( array( &$current_user, 'has_cap' ), $args );
 }
 
+/**
+ * Whether author of supplied post has capability or role.
+ *
+ * @since 2.9
+ *
+ * @param int|object $post Post ID or post object.
+ * @param string $capability Capability or role name.
+ * @return bool
+ */
+function author_can( $post, $capability ) {
+	if ( !$post = get_post($post) )
+		return false;
+
+	$author = new WP_User( $post->post_author );
+
+	if ( empty( $author ) )
+		return false;
+
+	$args = array_slice( func_get_args(), 2 );
+	$args = array_merge( array( $capability ), $args );
+
+	return call_user_func_array( array( &$author, 'has_cap' ), $args );
+}
+
 /**
  * Retrieve role object.
  *