From 4b33575af1ecfd173f14307654c4567f8665d8d0 Mon Sep 17 00:00:00 2001
From: Links <help.markus+gitk@gmail.com>
Date: Thu, 10 May 2018 20:42:03 +0200
Subject: [PATCH] add connectedClients see #242

---
 src/WebSocketsServer.cpp | 18 ++++++++++++++++++
 src/WebSocketsServer.h   |  2 ++
 2 files changed, 20 insertions(+)

diff --git a/src/WebSocketsServer.cpp b/src/WebSocketsServer.cpp
index 4a841c2..6c76af7 100644
--- a/src/WebSocketsServer.cpp
+++ b/src/WebSocketsServer.cpp
@@ -403,6 +403,24 @@ void WebSocketsServer::setAuthorization(const char * auth) {
     }
 }
 
+/**
+ * count the connected clients (optional ping them)
+ * @param ping bool ping the connected clients
+ */
+int WebSocketsServer::connectedClients(bool ping) {
+    WSclient_t * client;
+    int count = 0;
+	for(uint8_t i = 0; i < WEBSOCKETS_SERVER_CLIENT_MAX; i++) {
+		client = &_clients[i];
+		if(client->status == WSC_CONNECTED) {
+			if(ping != true || sendPing(i)) {
+				count++;
+			}
+		}
+	}
+    return count;
+}
+
 #if (WEBSOCKETS_NETWORK_TYPE == NETWORK_ESP8266) || (WEBSOCKETS_NETWORK_TYPE == NETWORK_ESP8266_ASYNC) || (WEBSOCKETS_NETWORK_TYPE == NETWORK_ESP32)
 /**
  * get an IP for a client
diff --git a/src/WebSocketsServer.h b/src/WebSocketsServer.h
index a8dcf6e..e010488 100644
--- a/src/WebSocketsServer.h
+++ b/src/WebSocketsServer.h
@@ -95,6 +95,8 @@ public:
         void setAuthorization(const char * user, const char * password);
         void setAuthorization(const char * auth);
 
+        int connectedClients(bool ping = false);
+
 #if (WEBSOCKETS_NETWORK_TYPE == NETWORK_ESP8266) || (WEBSOCKETS_NETWORK_TYPE == NETWORK_ESP8266_ASYNC) || (WEBSOCKETS_NETWORK_TYPE == NETWORK_ESP32)
         IPAddress remoteIP(uint8_t num);
 #endif