OTHER: Handle source preferences correctly

This is done through some ugly hack, that will have to exist until
xmms2d or the c++ bindings make things easier for us client developers
;-)

lib/sourcepref.h

@@ -0,0 +1,78 @@
+/** 
+ *  This file is a part of Promoe, an XMMS2 Client.
+ *
+ *  Copyright (C) 2008 XMMS2 Team
+ *
+ *  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 2
+ *  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.
+ */
+
+/*
+ * This file contains a hack to be able to honor source preferences when
+ * converting a Propdicts to a QHash<QString, QVariant>.
+ * It is only included in xclient.cpp and only used internally in that class
+ *
+ * The limitations that make this file necessary will be fixed with Coll2. So
+ * this file can be removed as soon as Coll2 reaches xmms2-stabe
+ *
+ *
+ * Minor note: At the time of writing this file, Coll2 wasn't in -devel, so
+ * this might still take some time
+ */
+
+#ifndef __SOURCEPREF__
+#define __SOURCEPREF__
+
+#include <xmmsclient/xmmsclient++/dict.h>
+
+#include <QList>
+#include <QRegExp>
+
+#include <QDebug>
+
+/*
+ * This class is used to get the source preference from a propdict as a
+ * QList<QRegExp>.
+ */
+class MyPropDict : public Xmms::PropDict
+{
+	public:
+		MyPropDict (const Xmms::PropDict &d) : PropDict (d) {}
+
+		QList<QRegExp> getSourcePreference () {
+			const char **sourcepref =
+			           xmmsc_result_source_preference_get (result_);
+			QList<QRegExp> prio_list;
+
+			for (; *sourcepref; ++sourcepref) {
+				prio_list.append (QRegExp (*sourcepref,
+				                           Qt::CaseSensitive,
+										   QRegExp::Wildcard));
+			}
+
+			return prio_list;
+		}
+};
+
+int
+getPriority (const QString source, const QList<QRegExp> prio_list) {
+	for (int i=0; i < prio_list.size (); ++i) {
+		if (prio_list[i].exactMatch (source))
+			return i;
+	}
+
+	// If source doesn't match any expression in prio_list return an invalid
+	// value. (The biggest valid value is prio_list.length () -1 )
+	// In that case, the caller should not use the value corresponding with
+	// this source
+	return prio_list.size ();
+}
+
+#endif