pull metadata link from wcs capabilities

src/providers/wcs/qgswcscapabilities.cpp

@@ -736,6 +736,8 @@ void QgsWcsCapabilities::parseCoverageOfferingBrief( QDomElement const &e, QgsWc
   coverageSummary.title = firstChildText( e, QStringLiteral( "label" ) );
   coverageSummary.abstract = firstChildText( e, QStringLiteral( "description" ) );
 
+  parseMetadataLink( e, coverageSummary.metadataLink );
+
   QList<QDomElement> posElements = domElements( e, QStringLiteral( "lonLatEnvelope.pos" ) );
   if ( posElements.size() != 2 )
   {
@@ -765,6 +767,28 @@ void QgsWcsCapabilities::parseCoverageOfferingBrief( QDomElement const &e, QgsWc
   QgsDebugMsg( QStringLiteral( "coverage orderId = %1 identifier = %2" ).arg( coverageSummary.orderId ).arg( coverageSummary.identifier ) );
 }
 
+void QgsWcsCapabilities::parseMetadataLink( QDomElement const &e, QgsWcsMetadataLinkProperty &metadataLink )
+{
+  QDomElement metadataElement = firstChild( e, QStringLiteral( "metadataLink" ) );
+
+  if ( !metadataElement.isNull() )
+  {
+    metadataLink.metadataType = metadataElement.attribute( QStringLiteral( "metadataType" ) );
+    metadataLink.xlinkHref = elementLink( metadataElement );
+  }
+
+}
+
+QString QgsWcsCapabilities::elementLink( QDomElement const &e )
+{
+  if ( !e.isNull() )
+  {
+    return QUrl::fromEncoded( e.attribute( QStringLiteral( "xlink:href" ) ).toUtf8() ).toString();
+  }
+
+  return QString();
+}
+
 bool QgsWcsCapabilities::convertToDom( QByteArray const &xml )
 {
   QgsDebugMsgLevel( QStringLiteral( "Entered." ), 4 );

src/providers/wcs/qgswcscapabilities.h

@@ -34,6 +34,13 @@
 class QNetworkAccessManager;
 class QNetworkReply;
 
+//! Metadata Link Property structure
+struct QgsWcsMetadataLinkProperty
+{
+  QString metadataType;
+  QString xlinkHref;
+};
+
 //! CoverageSummary structure
 struct QgsWcsCoverageSummary
 {
@@ -48,6 +55,8 @@ struct QgsWcsCoverageSummary
   QList<double> nullValues;
   QgsRectangle  wgs84BoundingBox; // almost useless, we need the native
   QString       nativeCrs;
+  //Optional metadataLink
+  QgsWcsMetadataLinkProperty metadataLink;
   // Map of bounding boxes, key is CRS name (srsName), e.g. EPSG:4326
   QMap<QString, QgsRectangle> boundingBoxes;
   QgsRectangle  nativeBoundingBox;
@@ -114,6 +123,9 @@ class QgsWcsCapabilities : public QObject
      */
     void coverageParents( QMap<int, int> &parents, QMap<int, QStringList> &parentNames ) const;
 
+    // Parse metadata element from the document
+    void parseMetadataLink( QDomElement const &e, QgsWcsMetadataLinkProperty &metadataLink );
+
     //! Gets coverage summary for identifier
     QgsWcsCoverageSummary coverage( QString const &identifier );
 
@@ -212,6 +224,9 @@ class QgsWcsCapabilities : public QObject
     //! Gets sub elements texts by path
     static QStringList domElementsTexts( const QDomElement &element, const QString &path );
 
+    //! Gets given element link tag value
+    static QString elementLink( QDomElement const &e );
+
   signals:
     //! \brief emit a signal to notify of a progress event
     void progressChanged( int progress, int totalSteps );

src/providers/wcs/qgswcsprovider.cpp

@@ -1244,6 +1244,14 @@ QString QgsWcsProvider::coverageMetadata( const QgsWcsCoverageSummary &coverage
   metadata += htmlRow( tr( "Name (identifier)" ), coverage.identifier );
   metadata += htmlRow( tr( "Title" ), coverage.title );
   metadata += htmlRow( tr( "Abstract" ), coverage.abstract );
+
+  if ( !coverage.metadataLink.metadataType.isNull()  &&
+       !coverage.metadataLink.xlinkHref.isNull() )
+  {
+    metadata += htmlRow( tr( "Metadata Type" ), coverage.metadataLink.metadataType );
+    metadata += htmlRow( tr( "Metadata Link" ), coverage.metadataLink.xlinkHref );
+  }
+
 #if 0
   // We don't have size, nativeCrs, nativeBoundingBox etc. until describe coverage which would be heavy for all coverages
   metadata += htmlRow( tr( "Fixed Width" ), QString::number( coverage.width ) );