Add support for IRCv3 message-tags Implement draft/multiline

src/irc/irc_message.cpp

@@ -1,8 +1,27 @@
 #include <irc/irc_message.hpp>
 #include <iostream>
+#include <string>
+#include <utils/split.hpp>
+#include <optional>
 
 IrcMessage::IrcMessage(std::stringstream ss)
 {
+  if (ss.peek() == '@')
+    {
+      std::string raw_tags;
+      ss.ignore();
+      ss >> raw_tags;
+      std::vector<std::string> tags = utils::split(raw_tags, ';', false);
+      for (auto &tag: tags)
+        {
+          auto pos = tag.find('=');
+          if (pos == std::string::npos)
+              this->tags[tag] = {};
+          else
+              this->tags[tag.substr(0, pos)] = tag.substr(pos+1);
+        }
+      ss.ignore();
+    }
   if (ss.peek() == ':')
     {
       ss.ignore();
@@ -30,6 +49,7 @@ IrcMessage::IrcMessage(std::stringstream ss)
 IrcMessage::IrcMessage(std::string&& prefix,
                        std::string&& command,
                        std::vector<std::string>&& args):
+  tags(),
   prefix(std::move(prefix)),
   command(std::move(command)),
   arguments(std::move(args))
@@ -38,16 +58,36 @@ IrcMessage::IrcMessage(std::string&& prefix,
 
 IrcMessage::IrcMessage(std::string&& command,
                        std::vector<std::string>&& args):
+  tags(),
   prefix(),
   command(std::move(command)),
   arguments(std::move(args))
 {
 }
 
+IrcMessage::IrcMessage(std::unordered_map<std::string, std::optional<std::string>>&& tags,
+                       std::string&& prefix,
+                       std::string&& command,
+                       std::vector<std::string>&& args):
+  tags(std::move(tags)),
+  prefix(std::move(prefix)),
+  command(std::move(command)),
+  arguments(std::move(args))
+{
+}
+
 std::ostream& operator<<(std::ostream& os, const IrcMessage& message)
 {
   os << "IrcMessage";
-  os << "[" << message.command << "]";
+  os << "{";
+  for (auto& tag: message.tags)
+    {
+      os << tag.first;
+      if (tag.second.has_value())
+         os << "=" << tag.second.value();
+      os << ";";
+    }
+  os << "}[" << message.command << "]";
   for (const std::string& arg: message.arguments)
     {
       os << "{" << arg << "}";