Be verbose about the connection status, and some errors

src/irc/irc_client.hpp

@@ -99,6 +99,12 @@ public:
    * Send the QUIT irc command
    */
   void send_quit_command();
+  /**
+   * Send a message to the gateway user, not generated by the IRC server,
+   * but that might be useful because we want to be verbose (for example we
+   * might want to notify the user about the connexion state)
+   */
+  void send_gateway_message(const std::string& message, const std::string& from="");
   /**
    * Forward the server message received from IRC to the XMPP component
    */
@@ -138,6 +144,14 @@ public:
    * received etc), send the self presence and topic to the XMPP user.
    */
   void on_channel_completely_joined(const IrcMessage& message);
+  /**
+   * We tried to set an invalid nickname
+   */
+  void on_erroneous_nickname(const IrcMessage& message);
+  /**
+   * Handles most errors from the server by just forwarding the message to the user.
+   */
+  void on_generic_error(const IrcMessage& message);
   /**
    * When a message 001 is received, join the rooms we wanted to join, and set our actual nickname
    */
@@ -208,6 +222,8 @@ typedef void (IrcClient::*irc_callback_t)(const IrcMessage&);
 
 static const std::unordered_map<std::string, irc_callback_t> irc_callbacks = {
   {"NOTICE", &IrcClient::forward_server_message},
+  {"002", &IrcClient::forward_server_message},
+  {"003", &IrcClient::forward_server_message},
   {"RPL_MOTDSTART", &IrcClient::empty_motd},
   {"375", &IrcClient::empty_motd},
   {"RPL_MOTD", &IrcClient::on_motd_line},
@@ -220,6 +236,8 @@ static const std::unordered_map<std::string, irc_callback_t> irc_callbacks = {
   {"332", &IrcClient::on_topic_received},
   {"TOPIC", &IrcClient::on_topic_received},
   {"366", &IrcClient::on_channel_completely_joined},
+  {"432", &IrcClient::on_erroneous_nickname},
+  {"461", &IrcClient::on_generic_error},
   {"001", &IrcClient::on_welcome_message},
   {"PART", &IrcClient::on_part},
   {"ERROR", &IrcClient::on_error},