add mcd

solanaceae/message3/message_command_dispatcher.hpp

@@ -0,0 +1,85 @@
+#pragma once
+
+#include <solanaceae/message3/registry_message_model.hpp>
+#include <solanaceae/contact/contact_model3.hpp>
+
+#include <deque>
+#include <string>
+#include <string_view>
+#include <functional>
+#include <unordered_map>
+
+// fwd
+struct ConfigModelI;
+
+class MessageCommandDispatcher : public RegistryMessageModelEventI {
+	Contact3Registry& _cr;
+	RegistryMessageModel& _rmm;
+	ConfigModelI& _conf;
+
+	public:
+		enum Perms {
+			BLACKLIST = 1 << 0,
+			WHITELIST = 1 << 1,
+
+			// can only be trumped by blacklist
+			EVERYONE = 1 << 2,
+
+			// can only be trumped by blacklist
+			// TODO: replace with groups?
+			ADMIN = 1 << 3,
+			MODERATOR = 1 << 4,
+		};
+
+	private:
+		struct Command {
+			std::string m; // module
+			std::string m_prefix; // module prefix (if any)
+			std::string command; // command
+			std::function<bool(std::string_view params, Message3Handle m)> fn;
+			std::string help_text;
+
+			Perms perms = Perms::ADMIN; // default to highest
+
+			//Command(const Command&) = delete;
+		};
+		std::unordered_map<std::string, Command> _command_map;
+
+		struct QueuedMessage {
+			Contact3 to;
+			std::string message;
+		};
+		std::deque<QueuedMessage> _message_queue;
+
+		uint64_t _program_started_at {0};
+
+	public:
+		MessageCommandDispatcher(Contact3Registry& cr, RegistryMessageModel& rmm, ConfigModelI& conf);
+		~MessageCommandDispatcher(void);
+
+		void iterate(float time_delta);
+
+		// TODO: think more about permissions?
+		//  - user(s)
+		//  - group(s)
+		//  - everyone else?
+
+		void registerCommand(
+			std::string_view m, // module
+			std::string_view m_prefix, // module prefix (if any)
+			std::string_view command, // command
+			std::function<bool(std::string_view params, Message3Handle m)>&& fn,
+			std::string_view help_text,
+			Perms perms = Perms::ADMIN
+		);
+
+		// generates a help
+		bool helpCommand(std::string_view params, Message3Handle m);
+
+		bool hasPermission(const Command& cmd, const Contact3 contact);
+
+	protected: // mm
+		bool onEvent(const Message::Events::MessageConstruct& e) override;
+		bool onEvent(const Message::Events::MessageUpdated& e) override;
+};
+