Better way to leave the dummy room

src/bridge/bridge.cpp

@@ -44,7 +44,9 @@ void Bridge::shutdown()
 {
   for (auto it = this->irc_clients.begin(); it != this->irc_clients.end(); ++it)
   {
-    it->second->send_quit_command("Gateway shutdown");
+    const std::string exit_message("Gateway shutdown");
+    it->second->send_quit_command(exit_message);
+    it->second->leave_dummy_channel(exit_message);
   }
 }
 

src/irc/irc_channel.cpp

@@ -48,6 +48,12 @@ void IrcChannel::remove_user(const IrcUser* user)
     }
 }
 
+void IrcChannel::remove_all_users()
+{
+  this->users.clear();
+  this->self.reset();
+}
+
 DummyIrcChannel::DummyIrcChannel():
   IrcChannel(),
   joining(false)

src/irc/irc_channel.hpp

@@ -24,6 +24,7 @@ public:
                     const std::map<char, char> prefix_to_mode);
   IrcUser* find_user(const std::string& name) const;
   void remove_user(const IrcUser* user);
+  void remove_all_users();
 
 protected:
   std::unique_ptr<IrcUser> self;

src/irc/irc_client.cpp

@@ -199,7 +199,7 @@ void IrcClient::send_part_command(const std::string& chan_name, const std::strin
   if (channel->joined == true)
     {
       if (chan_name.empty())
-        this->bridge->send_muc_leave(Iid(std::string("%") + this->hostname), std::string(this->current_nick), "", true);
+        this->leave_dummy_channel(status_message);
       else
         this->send_message(IrcMessage("PART", {chan_name, status_message}));
     }
@@ -652,3 +652,13 @@ DummyIrcChannel& IrcClient::get_dummy_channel()
 {
   return this->dummy_channel;
 }
+
+void IrcClient::leave_dummy_channel(const std::string& exit_message)
+{
+  if (!this->dummy_channel.joined)
+    return;
+  this->dummy_channel.joined = false;
+  this->dummy_channel.joining = false;
+  this->dummy_channel.remove_all_users();
+  this->bridge->send_muc_leave(Iid(std::string("%") + this->hostname), std::string(this->current_nick), exit_message, true);
+}

src/irc/irc_client.hpp

@@ -198,6 +198,11 @@ public:
    * Get a reference to the unique dummy channel
    */
   DummyIrcChannel& get_dummy_channel();
+  /**
+   * Leave the dummy channel: forward a message to the user to indicate that
+   * he left it, and mark it as not joined.
+   */
+  void leave_dummy_channel(const std::string& exit_message);
 
   const std::string& get_hostname() const { return this->hostname; }
   std::string get_nick() const { return this->current_nick; }