From bf2d1d401666a11d292e6c606d39d115f71a739e Mon Sep 17 00:00:00 2001
From: Rodrigo Primo <rodrigo@hacklab.com.br>
Date: Sun, 26 Jan 2014 20:14:13 -0200
Subject: [PATCH] don't create a new user if registration is disabled (fixes
 #19)

---
 social-connect.php | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/social-connect.php b/social-connect.php
index 725efc4..28326f6 100644
--- a/social-connect.php
+++ b/social-connect.php
@@ -214,15 +214,27 @@ function sc_social_connect_process_login( $is_ajax = false ) {
 		$user_login = $user_data->user_login;
 
 	} else { // Create new user and associate provider identity
-		$user_login = sc_get_unique_username($user_login);
-
-		$userdata = array( 'user_login' => $user_login, 'user_email' => $sc_email, 'first_name' => $sc_first_name, 'last_name' => $sc_last_name, 'user_url' => $sc_profile_url, 'user_pass' => wp_generate_password() );
-
-		// Create a new user
-		$user_id = wp_insert_user( $userdata );
-
-		if ( $user_id && is_integer( $user_id ) )
-			update_user_meta( $user_id, $sc_provider_identity_key, $sc_provider_identity );
+		if ( get_option( 'users_can_register' ) ) {
+			$user_login = sc_get_unique_username($user_login);
+	
+			$userdata = array( 'user_login' => $user_login, 'user_email' => $sc_email, 'first_name' => $sc_first_name, 'last_name' => $sc_last_name, 'user_url' => $sc_profile_url, 'user_pass' => wp_generate_password() );
+	
+			// Create a new user
+			$user_id = wp_insert_user( $userdata );
+	
+			if ( $user_id && is_integer( $user_id ) ) {
+				update_user_meta( $user_id, $sc_provider_identity_key, $sc_provider_identity );
+			}
+		} else {
+			add_filter( 'wp_login_errors', function ( $errors ) {
+				$errors->errors = array();
+				$errors->add( 'registration_disabled', __( '<strong>ERROR</strong>: Registration is disabled.', 'social-connect' ) );
+				
+				return $errors;
+			});
+			
+			return;
+		}
 	}
 
 	wp_set_auth_cookie( $user_id );