+/***************************************************************************
+ * Copyright (C) 2012 by Peter Penz <peter.penz19@gmail.com> *
+ * *
+ * 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. *
+ * *
+ * 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 *
+ ***************************************************************************/
+
+#include "knepomukrolesprovider_p.h"
+
+#include <KDebug>
+#include <KGlobal>
+
+#include <Nepomuk/Resource>
+#include <Nepomuk/Tag>
+#include <Nepomuk/Types/Property>
+#include <Nepomuk/Variant>
+
+struct KNepomukRolesProviderSingleton
+{
+ KNepomukRolesProvider instance;
+};
+K_GLOBAL_STATIC(KNepomukRolesProviderSingleton, s_nepomukRolesProvider)
+
+
+KNepomukRolesProvider& KNepomukRolesProvider::instance()
+{
+ return s_nepomukRolesProvider->instance;
+}
+
+KNepomukRolesProvider::~KNepomukRolesProvider()
+{
+}
+
+bool KNepomukRolesProvider::isNepomukRole(const QByteArray& role) const
+{
+ return m_roles.contains(role);
+}
+
+QHash<QByteArray, QVariant> KNepomukRolesProvider::roleValues(const QUrl& url,
+ const QSet<QByteArray>& roles) const
+{
+ const Nepomuk::Resource resource(url);
+ if (!resource.isValid()) {
+ return QHash<QByteArray, QVariant>();
+ }
+
+ QHash<QByteArray, QVariant> values;
+
+ int width = -1;
+ int height = -1;
+
+ QHashIterator<QUrl, Nepomuk::Variant> it(resource.properties());
+ while (it.hasNext()) {
+ it.next();
+
+ const Nepomuk::Types::Property property = it.key();
+ const QByteArray role = m_roleForUri.value(property.uri());
+ if (role.isEmpty() || !roles.contains(role)) {
+ continue;
+ }
+
+ const Nepomuk::Variant value = it.value();
+
+ if (role == "imageSize") {
+ // Merge the two Nepomuk properties for width and height
+ // as one string into the "imageSize" role
+ const QString uri = property.uri().toString();
+ if (uri.endsWith("#width")) {
+ width = value.toInt();
+ } else if (uri.endsWith("#height")) {
+ height = value.toInt();
+ }
+
+ if (width >= 0 && height >= 0) {
+ const QString widthAndHeight = QString::number(width) +
+ QLatin1String(" x ") +
+ QString::number(height);
+ values.insert(role, widthAndHeight);
+ }
+ } else if (role == "tags") {
+ const QString tags = tagsFromValues(value.toStringList());
+ values.insert(role, tags);
+ } else {
+ values.insert(role, value.toString());
+ }
+ }
+
+ return values;
+}
+
+KNepomukRolesProvider::KNepomukRolesProvider() :
+ m_roles(),
+ m_roleForUri()
+{
+ struct UriInfo
+ {
+ const char* const uri;
+ const char* const role;
+ };
+
+ // Mapping from the URIs to the KFileItemModel roles. Note that this must not be
+ // a 1:1 mapping: One role may contain several URI-values (e.g. the URIs for height and
+ // width of an image are mapped to the role "imageSize")
+ static const UriInfo uriInfoList[] = {
+ { "http://www.semanticdesktop.org/ontologies/2007/08/15/nao#numericRating", "rating" },
+ { "http://www.semanticdesktop.org/ontologies/2007/08/15/nao#hasTag", "tags" },
+ { "http://www.semanticdesktop.org/ontologies/2007/08/15/nao#description", "comment" },
+ { "http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#wordCount", "wordCount" },
+ { "http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#lineCount", "lineCount" },
+ { "http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#width", "imageSize" },
+ { "http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#height", "imageSize" },
+ { "http://www.semanticdesktop.org/ontologies/2007/05/10/nexif#orientation", "orientation", },
+ { "http://www.semanticdesktop.org/ontologies/2009/02/19/nmm#performer", "artist" },
+ { "http://www.semanticdesktop.org/ontologies/2009/02/19/nmm#musicAlbum", "album" },
+ { "http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#duration", "duration" },
+ { "http://www.semanticdesktop.org/ontologies/2009/02/19/nmm#trackNumber", "track" },
+ { "http://www.semanticdesktop.org/ontologies/2010/04/30/ndo#copiedFrom", "copiedFrom" }
+ };
+
+ for (unsigned int i = 0; i < sizeof(uriInfoList) / sizeof(UriInfo); ++i) {
+ m_roleForUri.insert(QUrl(uriInfoList[i].uri), uriInfoList[i].role);
+ m_roles.insert(uriInfoList[i].role);
+ }
+}
+
+QString KNepomukRolesProvider::tagsFromValues(const QStringList& values) const
+{
+ QString tags;
+
+ for (int i = 0; i < values.count(); ++i) {
+ if (i > 0) {
+ tags.append(QLatin1String(", "));
+ }
+
+ const Nepomuk::Tag tag(values[i]);
+ tags += tag.genericLabel();
+ }
+
+ return tags;
+}
+
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