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+//
+// VMime library (http://www.vmime.org)
+// Copyright (C) 2002 Vincent Richard <vincent@vmime.org>
+//
+// This program 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.
+//
+// This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// Linking this library statically or dynamically with other modules is making
+// a combined work based on this library.  Thus, the terms and conditions of
+// the GNU General Public License cover the whole combination.
+//
+
+#ifndef VMIME_MISC_IMPORTANCEHELPER_HPP_INCLUDED
+#define VMIME_MISC_IMPORTANCEHELPER_HPP_INCLUDED
+
+
+#include "vmime/message.hpp"
+
+
+namespace vmime {
+namespace misc {
+
+
+/** Deals with setting and retrieving message importance (also
+  * known as priority).
+  *
+  * Basically, it wraps the use of the 'X-Priority' (non standard)
+  * and 'Importance' (RFC-1327, RFC-1911) fields.
+  */
+class VMIME_EXPORT importanceHelper {
+
+public:
+
+	/** Different levels of importance. */
+	enum Importance {
+		IMPORTANCE_HIGHEST,
+		IMPORTANCE_HIGH,
+		IMPORTANCE_NORMAL,
+		IMPORTANCE_LOW,
+		IMPORTANCE_LOWEST
+	};
+
+
+	/** Reset the importance of the message to the default importance.
+	  *
+	  * @param msg message on which to reset importance
+	  */
+	static void resetImportance(const shared_ptr <message>& msg);
+
+	/** Reset the importance of a message to the default importance.
+	  *
+	  * @param hdr message header on which to reset importance
+	  */
+	static void resetImportanceHeader(const shared_ptr <header>& hdr);
+
+	/** Return the importance of the specified message.
+	  *
+	  * @param msg message from which to retrieve importance
+	  * @return importance of the message, or default importance is no
+	  * information about importance is given in the message
+	  */
+	static Importance getImportance(const shared_ptr <const message>& msg);
+
+	/** Return the importance of a message, given its header.
+	  *
+	  * @param hdr message header from which to retrieve importance
+	  * @return importance of the message, or default importance is no
+	  * information about importance is given in the message
+	  */
+	static Importance getImportanceHeader(const shared_ptr <const header>& hdr);
+
+	/** Set the importance of the specified message.
+	  *
+	  * @param msg message on which to set importance
+	  * @param i new message importance
+	  */
+	static void setImportance(const shared_ptr <message>& msg, const Importance i);
+
+	/** Set the importance of a message, given its header.
+	  *
+	  * @param hdr message header on which to set importance
+	  * @param i new message importance
+	  */
+	static void setImportanceHeader(const shared_ptr <header>& hdr, const Importance i);
+};
+
+
+} // misc
+} // vmime
+
+
+#endif // VMIME_MISC_IMPORTANCEHELPER_HPP_INCLUDED