Basic isupport support

CHANMODES and PREFIX only

src/irc/irc_client.cpp

@@ -16,7 +16,8 @@ IrcClient::IrcClient(const std::string& hostname, const std::string& username, B
   username(username),
   current_nick(username),
   bridge(bridge),
-  welcomed(false)
+  welcomed(false),
+  chanmodes({"", "", "", ""})
 {
 }
 
@@ -196,6 +197,32 @@ void IrcClient::forward_server_message(const IrcMessage& message)
   this->bridge->send_xmpp_message(this->hostname, from, body);
 }
 
+void IrcClient::on_isupport_message(const IrcMessage& message)
+{
+  const size_t len = message.arguments.size();
+  for (size_t i = 1; i < len; ++i)
+  {
+    const std::string token = message.arguments[i];
+    if (token.substr(0, 10) == "CHANMODES=")
+    {
+      this->chanmodes = utils::split(token.substr(11), ',');
+      // make sure we have 4 strings
+      this->chanmodes.resize(4);
+    }
+    else if (token.substr(0, 7) == "PREFIX=")
+      {
+        size_t i = 8;           // jump PREFIX=(
+        size_t j = 9;
+        // Find the ) char
+        while (j < token.size() && token[j] != ')')
+          j++;
+        j++;
+        while (j < token.size() && token[i] != ')')
+          this->prefix_to_mode[token[j++]] = token[i++];
+      }
+  }
+}
+
 void IrcClient::send_gateway_message(const std::string& message, const std::string& from)
 {
   this->bridge->send_xmpp_message(this->hostname, from, message);

src/irc/irc_client.hpp

@@ -8,7 +8,9 @@
 #include <network/socket_handler.hpp>
 
 #include <unordered_map>
+#include <vector>
 #include <string>
+#include <map>
 
 class Bridge;
 
@@ -109,6 +111,11 @@ public:
    * Forward the server message received from IRC to the XMPP component
    */
   void forward_server_message(const IrcMessage& message);
+  /**
+   * When receiving the isupport informations.  See
+   * http://www.irc.org/tech_docs/draft-brocklesby-irc-isupport-03.txt
+   */
+  void on_isupport_message(const IrcMessage& message);
   /**
    * Just empty the motd we kept as a string
    */
@@ -208,11 +215,24 @@ private:
    */
   std::vector<std::string> channels_to_join;
   bool welcomed;
+  /**
+   * See http://www.irc.org/tech_docs/draft-brocklesby-irc-isupport-03.txt section 3.3
+   * We store the possible chanmodes in this object.
+   * chanmodes[0] contains modes of type A, [1] of type B etc
+   */
+  std::vector<std::string> chanmodes;
   /**
    * Each motd line received is appended to this string, which we send when
    * the motd is completely received
    */
   std::string motd;
+  /**
+   * See http://www.irc.org/tech_docs/draft-brocklesby-irc-isupport-03.txt section 3.14
+   * The example given would be transformed into
+   * modes_to_prefix = {{'a', '&'}, {'b', '*'}}
+   */
+  std::map<char, char> prefix_to_mode;
+
   IrcClient(const IrcClient&) = delete;
   IrcClient(IrcClient&&) = delete;
   IrcClient& operator=(const IrcClient&) = delete;
@@ -229,6 +249,7 @@ 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},
+  {"005", &IrcClient::on_isupport_message},
   {"RPL_MOTDSTART", &IrcClient::empty_motd},
   {"375", &IrcClient::empty_motd},
   {"RPL_MOTD", &IrcClient::on_motd_line},