protocol:

	a bit of work with "client_event_subscription_request"
	some comments
server:
	event subsystem:
		event's object class skeleton
		very basic event subscription handler

5 files changed, 145 insertions, 2 deletions

diff --git a/server/include/api_module_base.h b/server/include/api_module_base.h
index 6f01746..9c1b639 100644
--- a/server/include/api_module_base.h
+++ b/server/include/api_module_base.h
@@ -49,7 +49,7 @@ class module_base
 		{
 			return settings;
 		}
-		virtual ~module_base() = 0;
+		virtual ~module_base(){};
 	protected:
 		std::map<std::string, setting_s> settings;
 		module_info_base info;
diff --git a/server/include/client.h b/server/include/client.h
index f9daff6..d6668a3 100644
--- a/server/include/client.h
+++ b/server/include/client.h
@@ -1,19 +1,47 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
 #ifndef CLIENT_H
 #define CLIENT_H
 
 #include <string>
+#include <list>
+#include "event_subscription_base.h"
+
+class server_session;
 
 class client
 {
 	public:
-		client(std::string &client_auth_token);
+		client(std::string &client_auth_token, server_session *sess = nullptr);
+		void add_event_subscription(event_subscription_base* e);
 		virtual ~client();
 	protected:
 	private:
 		//TODO: client subscriptions should be stored here
 		//TODO: list of timers with direct callbacks to functions for periodic subscription (bost::asio::deadline_timer)
 		//TODO: store sessions ptr list
+		//TODO: some way to call core and mopdules api from here
 		std::string auth_token;
+		server_session *session;
+		std::list<event_subscription_base*> subscriptions;
 };
 
 #endif // CLIENT_H
diff --git a/server/include/event_subscription_base.h b/server/include/event_subscription_base.h
new file mode 100644
index 0000000..19b184f
--- /dev/null
+++ b/server/include/event_subscription_base.h
@@ -0,0 +1,42 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#ifndef EVENT_SUBSCRIPTION_H
+#define EVENT_SUBSCRIPTION_H
+
+#include "../../protocol/udm.pb.h"
+
+//TODO: rework (events and polls separated ?)
+
+enum EVENT_SUBTYPE {
+	EVENT_SUBTYPE_REPEATED = 0, //periodic firing based on timer
+	EVENT_SUBTYPE_EVENT = 1, //fired on event occurs (only can be used for data which support this event type)
+};
+
+class event_subscription_base
+{
+public:
+	event_subscription_base(){};
+	virtual ~event_subscription_base(){};
+protected:
+	SUBSCRIPTION_TYPE type = SUBSCRIPTION_TYPE::S_DOWNLOAD_STATE_CHANGE;
+	EVENT_SUBTYPE subtype = EVENT_SUBTYPE::EVENT_SUBTYPE_EVENT;
+};
+#endif // EVENT_SUBSCRIPTION_H
diff --git a/server/include/event_subscription_event.h b/server/include/event_subscription_event.h
new file mode 100644
index 0000000..16172cf
--- /dev/null
+++ b/server/include/event_subscription_event.h
@@ -0,0 +1,35 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#ifndef EVENT_SUBSCRIPTION_EVENT_H
+#define EVENT_SUBSCRIPTION_EVENT_H
+
+#include "event_subscription_base.h"
+
+class event_subscription_event : public event_subscription_base
+{
+public:
+	event_subscription_event(client_event_subscription_request *req);
+	~event_subscription_event();
+
+};
+
+#endif // EVENT_SUBSCRIPTION_EVENT_H
diff --git a/server/include/event_subscription_repeated.h b/server/include/event_subscription_repeated.h
new file mode 100644
index 0000000..bb676a3
--- /dev/null
+++ b/server/include/event_subscription_repeated.h
@@ -0,0 +1,38 @@
+/*
+        Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#ifndef EVENT_SUBSCRIPTION_PERIODIC_H
+#define EVENT_SUBSCRIPTION_PERIODIC_H
+
+#include "event_subscription_base.h"
+
+class event_subscription_repeated : public event_subscription_base
+{
+public:
+	event_subscription_repeated(client_event_subscription_request *req);
+	~event_subscription_repeated();
+private:
+	bool one_time;
+	int64_t interval;
+
+};
+
+#endif // EVENT_SUBSCRIPTION_PERIODIC_H