3 files changed, 37 insertions, 0 deletions
diff --git a/Swiften/Elements/StatusShow.h b/Swiften/Elements/StatusShow.h
index 747ddf1..1bdae96 100644
--- a/Swiften/Elements/StatusShow.h
+++ b/Swiften/Elements/StatusShow.h
@@ -38,6 +38,22 @@ namespace Swift {
 				return "Unknown";
 			}
 
+			/**
+			 * Can be used for rough ordering of Types.
+			 * Greater magnitude = more available.
+			 */
+			static int typeToAvailabilityOrdering(Type type) {
+				switch (type) {
+				case Online: return 4;
+				case FFC: return 5;
+				case Away: return 2;
+				case XA: return 1;
+				case DND: return 3;
+				case None: return 0;
+				}
+				return -1;
+			}
+
 		private:
 			Type type_;
 	};
diff --git a/Swiften/Presence/PresenceOracle.cpp b/Swiften/Presence/PresenceOracle.cpp
index 758ae7c..439a84d 100644
--- a/Swiften/Presence/PresenceOracle.cpp
+++ b/Swiften/Presence/PresenceOracle.cpp
@@ -59,5 +59,25 @@ Presence::ref PresenceOracle::getLastPresence(const JID& jid) const {
 	}
 }
 
+Presence::ref PresenceOracle::getHighestPriorityPresence(const JID& bareJID) const {
+	PresencesMap::const_iterator i = entries_.find(bareJID);
+	if (i == entries_.end()) {
+		return Presence::ref();
+	}
+	PresenceMap presenceMap = i->second;
+	PresenceMap::const_iterator j = presenceMap.begin();
+	Presence::ref highest;
+	for (; j != presenceMap.end(); j++) {
+		Presence::ref current = j->second;
+		if (!highest
+				|| current->getPriority() > highest->getPriority()
+				|| (current->getPriority() == highest->getPriority()
+						&& StatusShow::typeToAvailabilityOrdering(current->getShow()) > StatusShow::typeToAvailabilityOrdering(highest->getShow()))) {
+			highest = current;
+		}
+
+	}
+	return highest;
+}
 
 }
diff --git a/Swiften/Presence/PresenceOracle.h b/Swiften/Presence/PresenceOracle.h
index e5f0372..8c4fce4 100644
--- a/Swiften/Presence/PresenceOracle.h
+++ b/Swiften/Presence/PresenceOracle.h
@@ -21,6 +21,7 @@ class StanzaChannel;
 			~PresenceOracle();
 
 			Presence::ref getLastPresence(const JID&) const;
+			Presence::ref getHighestPriorityPresence(const JID& bareJID) const;
 
 		public:
 			boost::signal<void (boost::shared_ptr<Presence>)> onPresenceChange;