Do not reply with an error when receiving a presence for a user JID

fix #3224

src/xmpp/biboumi_component.cpp

@@ -210,11 +210,8 @@ void BiboumiComponent::handle_presence(const Stanza& stanza)
             this->send_presence_to_contact(to_str, from.bare(), "");
         }
     }
-  else
-    {
-      // A user wants to join an invalid IRC channel, return a presence error to him/her
-      if (type.empty())
-        this->send_invalid_room_error(to.local, to.resource, from_str);
+  else if (iid.type == Iid::Type::User)
+    { // Do nothing yet
     }
   }
   catch (const IRCNotConnected& ex)

src/xmpp/xmpp_component.cpp

@@ -261,7 +261,6 @@ void XmppComponent::handle_error(const Stanza& stanza)
   if (!this->ever_auth)
     sd_notifyf(0, "STATUS=Failed to authenticate to the XMPP server: %s", error_message.data());
 #endif
-
 }
 
 void* XmppComponent::get_receive_buffer(const size_t size) const
@@ -338,35 +337,6 @@ void XmppComponent::send_user_join(const std::string& from,
   this->send_stanza(presence);
 }
 
-void XmppComponent::send_invalid_room_error(const std::string& muc_name,
-                                            const std::string& nick,
-                                            const std::string& to)
-{
-  Stanza presence("presence");
-  {
-    if (!muc_name.empty ())
-      presence["from"] = muc_name + "@" + this->served_hostname + "/" + nick;
-    else
-      presence["from"] = this->served_hostname;
-    presence["to"] = to;
-    presence["type"] = "error";
-    XmlSubNode x(presence, "x");
-    x["xmlns"] = MUC_NS;
-    XmlSubNode error(presence, "error");
-    error["by"] = muc_name + "@" + this->served_hostname;
-    error["type"] = "cancel";
-    XmlSubNode item_not_found(error, "item-not-found");
-    item_not_found["xmlns"] = STANZA_NS;
-    XmlSubNode text(error, "text");
-    text["xmlns"] = STANZA_NS;
-    text["xml:lang"] = "en";
-    text.set_inner(muc_name +
-                   " is not a valid IRC channel name. A correct room jid is of the form: #<chan>%<server>@" +
-                   this->served_hostname);
-  }
-  this->send_stanza(presence);
-}
-
 void XmppComponent::send_topic(const std::string& from, Xmpp::body&& topic, const std::string& to, const std::string& who)
 {
   Stanza message("message");

src/xmpp/xmpp_component.hpp

@@ -123,12 +123,6 @@ public:
                       const std::string& role,
                       const std::string& to,
                       const bool self);
-  /**
-   * Send an error to indicate that the user tried to join an invalid room
-   */
-  void send_invalid_room_error(const std::string& muc_jid,
-                               const std::string& nick,
-                               const std::string& to);
   /**
    * Send the MUC topic to the user
    */