Avancing in profile.php module to show public profile

* Get urlargs correctly (username from URL)
* Validate the username by the regex
* Get $actor to be used in page HTML

web/src/public/profile.php

@@ -1,3 +1,15 @@
+<?php require 'base.php' ?>
+<?php require 'database.php' ?>
 <?php
 
-echo 'PROFILE';
+$args = urlargs();
+$database = new DB();
+$username = substr($args[0], 1);
+if (!validate_username($username))
+	$username = false;
+
+$actor = null;
+if ($username !== false)
+	$actor = $database->getActorByUsername($username);
+
+echo json_encode($actor);