fix(eventsub): check keepalive (#6058)

lib/twitch-eventsub-ws/include/twitch-eventsub-ws/payloads/session-welcome.hpp

@@ -24,7 +24,8 @@ namespace chatterino::eventsub::lib::payload::session_welcome {
 /// json_inner=session
 struct Payload {
     std::string id;
-    std::optional<std::string> reconnectURL;
+    std::optional<std::string> reconnectURL;     // null in welcome message
+    std::optional<int> keepaliveTimeoutSeconds;  // null in reconnect message
 };
 
 #include "twitch-eventsub-ws/payloads/session-welcome.inc"

lib/twitch-eventsub-ws/include/twitch-eventsub-ws/session.hpp

@@ -7,21 +7,16 @@
 #include <boost/beast/websocket/ssl.hpp>
 #include <boost/json.hpp>
 
+namespace chatterino::eventsub::lib::messages {
+
+struct Metadata;
+
+}  // namespace chatterino::eventsub::lib::messages
+
 namespace chatterino::eventsub::lib {
 
 class Listener;
 
-/**
- * handleMessage takes the incoming message in the buffer, parses it
- * as JSON then forwards it to the listener, if applicable.
- *
- * This is called from the Session, and is only provided if you are interested
- * in building your own boost asio framework thing
- **/
-boost::system::error_code handleMessage(
-    std::unique_ptr<Listener> &listener,
-    const boost::beast::flat_buffer &buffer);
-
 class Session : public std::enable_shared_from_this<Session>
 {
 public:
@@ -38,13 +33,17 @@ public:
 
     Listener *getListener();
 
+    // public for testing
+    boost::system::error_code handleMessage(
+        const boost::beast::flat_buffer &buffer);
+
 private:
     void onResolve(boost::beast::error_code ec,
-                   boost::asio::ip::tcp::resolver::results_type results);
+                   const boost::asio::ip::tcp::resolver::results_type &results);
 
     void onConnect(
         boost::beast::error_code ec,
-        boost::asio::ip::tcp::resolver::results_type::endpoint_type ep);
+        const boost::asio::ip::tcp::resolver::results_type::endpoint_type &ep);
 
     void onSSLHandshake(boost::beast::error_code ec);
 
@@ -56,6 +55,14 @@ private:
 
     void fail(boost::beast::error_code ec, std::string_view op);
 
+    boost::system::error_code onSessionWelcome(
+        const messages::Metadata &metadata, const boost::json::value &jv);
+    boost::system::error_code onSessionReconnect(const boost::json::value &jv);
+    boost::system::error_code onNotification(const messages::Metadata &metadata,
+                                             const boost::json::value &jv);
+
+    void checkKeepalive();
+
     boost::asio::ip::tcp::resolver resolver;
     boost::beast::websocket::stream<
         boost::beast::ssl_stream<boost::beast::tcp_stream>>
@@ -66,6 +73,10 @@ private:
     std::string path;
     std::string userAgent;
     std::unique_ptr<Listener> listener;
+
+    std::chrono::seconds keepaliveTimeout{0};
+    bool receivedMessage = false;
+    std::unique_ptr<boost::asio::system_timer> keepaliveTimer;
 };
 
 }  // namespace chatterino::eventsub::lib