Channel names are case insensitive

But some servers (epiknet for example) send channel names with an uppercase

src/irc/irc_client.cpp

@@ -4,6 +4,7 @@
 #include <irc/irc_user.hpp>
 
 #include <utils/make_unique.hpp>
+#include <utils/tolower.hpp>
 #include <utils/split.hpp>
 
 #include <iostream>
@@ -174,7 +175,7 @@ void IrcClient::forward_server_message(const IrcMessage& message)
 
 void IrcClient::set_and_forward_user_list(const IrcMessage& message)
 {
-  const std::string chan_name = message.arguments[2];
+  const std::string chan_name = utils::tolower(message.arguments[2]);
   IrcChannel* channel = this->get_channel(chan_name);
   std::vector<std::string> nicks = utils::split(message.arguments[3], ' ');
   for (const std::string& nick: nicks)
@@ -190,7 +191,7 @@ void IrcClient::set_and_forward_user_list(const IrcMessage& message)
 
 void IrcClient::on_channel_join(const IrcMessage& message)
 {
-  const std::string chan_name = message.arguments[0];
+  const std::string chan_name = utils::tolower(message.arguments[0]);
   IrcChannel* channel = this->get_channel(chan_name);
   const std::string nick = message.prefix;
   if (channel->joined == false)
@@ -252,14 +253,14 @@ void IrcClient::send_motd(const IrcMessage& message)
 
 void IrcClient::on_topic_received(const IrcMessage& message)
 {
-  const std::string chan_name = message.arguments[1];
+  const std::string chan_name = utils::tolower(message.arguments[1]);
   IrcChannel* channel = this->get_channel(chan_name);
   channel->topic = message.arguments[2];
 }
 
 void IrcClient::on_channel_completely_joined(const IrcMessage& message)
 {
-  const std::string chan_name = message.arguments[1];
+  const std::string chan_name = utils::tolower(message.arguments[1]);
   IrcChannel* channel = this->get_channel(chan_name);
   this->bridge->send_self_join(this->hostname, chan_name, channel->get_self()->nick);
   this->bridge->send_topic(this->hostname, chan_name, channel->topic);
@@ -276,7 +277,7 @@ void IrcClient::on_welcome_message(const IrcMessage& message)
 
 void IrcClient::on_part(const IrcMessage& message)
 {
-  const std::string chan_name = message.arguments[0];
+  const std::string chan_name = utils::tolower(message.arguments[0]);
   IrcChannel* channel = this->get_channel(chan_name);
   std::string txt;
   if (message.arguments.size() >= 2)
@@ -348,7 +349,7 @@ void IrcClient::on_kick(const IrcMessage& message)
 {
   const std::string target = message.arguments[1];
   const std::string reason = message.arguments[2];
-  const std::string chan_name = message.arguments[0];
+  const std::string chan_name = utils::tolower(message.arguments[0]);
   IrcChannel* channel = this->get_channel(chan_name);
   if (channel->get_self()->nick == target)
     channel->joined = false;

src/test.cpp

@@ -6,6 +6,7 @@
 #include <utils/encoding.hpp>
 #include <config/config.hpp>
 #include <bridge/colors.hpp>
+#include <utils/tolower.hpp>
 #include <utils/split.hpp>
 #include <xmpp/jid.hpp>
 #include <string.h>
@@ -66,6 +67,10 @@ int main()
   assert(splitted[0] == "");
   assert(splitted[1] == "a");
 
+  const std::string lowercase = utils::tolower("CoUcOu LeS CoPaiNs ♥");
+  std::cout << lowercase << std::endl;
+  assert(lowercase == "coucou les copains ♥");
+
   /**
    * XML parsing
    */

src/utils/tolower.hpp

@@ -0,0 +1,18 @@
+#ifndef TOLOWER_INCLUDED
+# define TOLOWER_INCLUDED
+
+#include <string>
+
+namespace utils
+{
+  std::string tolower(const std::string& original)
+  {
+    std::string res;
+    res.reserve(original.size());
+    for (const char c: original)
+      res += static_cast<char>(std::tolower(c));
+    return res;
+  }
+}
+
+#endif // SPLIT_INCLUDED