mvp irc client for solanaceae with plugin

non exhausitve list of missing stuff:
 - notices (only channel partly implemented)
 - invites
 - initiating private chat
 - channel membership status and other flags

src/solanaceae/ircclient_contacts/ircclient_contact_model.hpp

@@ -0,0 +1,62 @@
+#pragma once
+
+#include <solanaceae/contact/contact_model3.hpp>
+#include <solanaceae/util/config_model.hpp>
+
+#include <solanaceae/ircclient/ircclient.hpp>
+
+#include <vector>
+#include <string>
+#include <queue>
+#include <cstdint>
+
+#include <iostream> // tmp
+
+class IRCClientContactModel : public IRCClientEventI, public ContactModel3I {
+	Contact3Registry& _cr;
+	ConfigModelI& _conf;
+	IRCClient1& _ircc;
+
+	// cm needs the connect event to happen
+	bool _connected {false};
+
+	std::vector<uint8_t> _server_hash; // cached for id gen
+	Contact3 _server = entt::null;
+	Contact3 _self = entt::null;
+
+	// used if not connected
+	std::queue<std::string> _join_queue;
+
+	public:
+		IRCClientContactModel(
+			Contact3Registry& cr,
+			ConfigModelI& conf,
+			IRCClient1& ircc
+		);
+
+		virtual ~IRCClientContactModel(void);
+
+		void join(const std::string& channel);
+
+	private:
+		// just the hash algo
+		std::vector<uint8_t> getHash(std::string_view value);
+
+	public:
+		// the actually ID is a chain containing the server+channel or server+name
+		// eg: hash(hash(ServerName)+ChannelName)
+		std::vector<uint8_t> getIDHash(std::string_view name);
+
+		Contact3Handle getC(std::string_view channel);
+		Contact3Handle getU(std::string_view nick);
+		// user or channel using channel prefix
+		Contact3Handle getCU(std::string_view name);
+
+	private: // ircclient
+		bool onEvent(const IRCClient::Events::Connect& e) override;
+		bool onEvent(const IRCClient::Events::Numeric& e) override;
+		bool onEvent(const IRCClient::Events::Join& e) override;
+		bool onEvent(const IRCClient::Events::Part& e) override;
+		bool onEvent(const IRCClient::Events::Quit& e) override;
+		bool onEvent(const IRCClient::Events::CTCP_Req&) override;
+};