Fix repeated signal connects on reconnect in irc server (#1576)

src/providers/irc/AbstractIrcServer.hpp

@@ -21,6 +21,10 @@ public:
 
     virtual ~AbstractIrcServer() = default;
 
+    // initializeIrc must be called from the derived class
+    // this allows us to initialize the abstract irc server based on the derived class's parameters
+    void initializeIrc();
+
     // connection
     void connect();
     void disconnect();
@@ -45,8 +49,15 @@ public:
 protected:
     AbstractIrcServer();
 
+    // initializeConnectionSignals is called on a connection once in its lifetime.
+    // it can be used to connect signals to your class
+    virtual void initializeConnectionSignals(IrcConnection *connection,
+                                             ConnectionType type){};
+
+    // initializeConnection is called every time before we try to connect to the irc server
     virtual void initializeConnection(IrcConnection *connection,
                                       ConnectionType type) = 0;
+
     virtual std::shared_ptr<Channel> createChannel(
         const QString &channelName) = 0;
 
@@ -83,6 +94,8 @@ private:
 
     //    bool autoReconnect_ = false;
     pajlada::Signals::SignalHolder connections_;
+
+    bool initialized_{false};
 };
 
 }  // namespace chatterino