Added an ApplicationGroup system to track the multiple sessions open by a user

src/ui/LmsApplicationGroup.hpp

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2018 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS 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 LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <map>
+
+#include <Wt/WSignal.h>
+#include <Wt/WEnvironment.h>
+
+namespace UserInterface {
+
+
+struct LmsApplicationInfo
+{
+	Wt::UserAgent userAgent;
+
+	static LmsApplicationInfo fromEnvironment(const Wt::WEnvironment& env);
+};
+
+// LmsApplication instances are grouped by User
+class LmsApplicationGroup
+{
+	public:
+		void join(LmsApplicationInfo info);
+		void leave();
+
+		std::vector<LmsApplicationInfo> list() const;
+
+		void postOthers(std::function<void()> func) const;
+
+	private:
+
+		std::vector<std::string>  getOtherSessionIds() const;
+
+		std::map<std::string, LmsApplicationInfo> _apps;
+};
+
+using LmsApplicationGroups = std::map<Wt::WString, LmsApplicationGroup>;
+
+} // UserInterface