Validation and (.) support

Added validation for the username in the install proces.
Added dot (.) to the list of allowed symbols.

src/psm/Module/Install/Controller/InstallController.php

@@ -244,6 +244,7 @@ class InstallController extends AbstractController {
 		} else {
 			// validate the lot
 			try {
+				$validator->username_new($new_user['user_name']);
 				$validator->email($new_user['email']);
 				$validator->password($new_user['password'], $new_user['password_repeat']);
 			} catch(\InvalidArgumentException $e) {

src/psm/Util/User/UserValidator.php

@@ -78,7 +78,7 @@ class UserValidator {
 		if(strlen($username) > 64 || strlen($username) < 2) {
             throw new \InvalidArgumentException('user_name_bad_length');
         }
-		if (!preg_match('/^[a-zA-Z\d_]{2,64}$/i', $username)) {
+		if (!preg_match('/^[a-zA-Z\d_\.]{2,64}$/i', $username)) {
             throw new \InvalidArgumentException('user_name_invalid');
 		}
 		$user_exists = $this->user->getUserByUsername($username);
@@ -107,11 +107,30 @@ class UserValidator {
 	}
 
 	/**
-	 * Check email
+	* Install only; Check username on:
-	 * @param string $email
+	*
-	 * @return boolean
+	* - Length (2-64 chars)
-	 * @throws \InvalidArgumentException
+	* - Contents (alphabetic chars and digits only)
-	 */
+	* @param string $username
+	* @return boolean
+	* @throws \InvalidArgumentException
+	*/
+	public function username_new($username) {
+		if(strlen($username) > 64 || strlen($username) < 2) {
+			throw new \InvalidArgumentException('user_name_bad_length');
+		}
+		if (!preg_match('/^[a-zA-Z\d_\.]{2,64}$/i', $username)) {
+			throw new \InvalidArgumentException('user_name_invalid');
+		}
+		return true;
+	}
+
+	/**
+	* Check email
+	* @param string $email
+	* @return boolean
+	* @throws \InvalidArgumentException
+	*/
 	public function email($email) {
 		if(strlen($email) > 255 || strlen($email) < 5) {
 			throw new \InvalidArgumentException('user_email_bad_length');