content: /**
   * ﻿Copyright (C) 2007 - 2019 52°North Initiative for Geospatial Open Source
   * Software GmbH
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published
   * by the Free Software Foundation.
   *
   * If the program is linked with libraries which are licensed under one of
   * the following licenses, the combination of the program with the linked
   * library is not considered a "derivative work" of the program:
   *
   *       • Apache License, version 2.0
   *       • Apache Software License, version 1.0
   *       • GNU Lesser General Public License, version 3
   *       • Mozilla Public License, versions 1.0, 1.1 and 2.0
   *       • Common Development and Distribution License (CDDL), version 1.0
   *
   * Therefore the distribution of the program linked with libraries licensed
   * under the aforementioned licenses, is permitted by the copyright holders
   * if the distribution is compliant with both the GNU General Public
   * License version 2 and the aforementioned licenses.
   *
   * As an exception to the terms of the GPL, you may copy, modify,
   * propagate, and distribute a work formed by combining 52°North WPS
   * GeoTools Modules with the Eclipse Libraries, or a work derivative of
   * such a combination, even if such copying, modification, propagation, or
   * distribution would otherwise violate the terms of the GPL. Nothing in
   * this exception exempts you from complying with the GPL in all respects
   * for all of the code used other than the Eclipse Libraries. You may
   * include this exception and its grant of permissions when you distribute
   * 52°North WPS GeoTools Modules. Inclusion of this notice with such a
   * distribution constitutes a grant of such permissions. If you do not wish
   * to grant these permissions, remove this paragraph from your
   * distribution. "52°North WPS GeoTools Modules" means the 52°North WPS
   * modules using GeoTools functionality - software licensed under version 2
   * or any later version of the GPL, or a work based on such software and
   * licensed under the GPL. "Eclipse Libraries" means Eclipse Modeling
   * Framework Project and XML Schema Definition software distributed by the
   * Eclipse Foundation and licensed under the Eclipse Public License Version
   * 1.0 ("EPL"), or a work based on such software and licensed under the EPL.
   *
   * 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.
   */
  package org.n52.wps.io.datahandler.generator;
  
  import java.io.ByteArrayInputStream;
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.UUID;
  
  import javax.xml.parsers.DocumentBuilderFactory;
  import javax.xml.parsers.ParserConfigurationException;
  import javax.xml.transform.TransformerException;
  
  import org.apache.commons.httpclient.HttpException;
  import org.n52.wps.PropertyDocument.Property;
  import org.n52.wps.commons.WPSConfig;
  import org.n52.wps.commons.XMLUtil;
  import org.n52.wps.io.data.GenericFileDataWithGT;
  import org.n52.wps.io.data.IData;
  import org.n52.wps.io.data.binding.complex.GTRasterDataBinding;
  import org.n52.wps.io.data.binding.complex.GeotiffBinding;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.w3c.dom.Document;
  import org.w3c.dom.Element;
  
  
  //TODO: compact the 3 OWS Generators into a single one
  
  public class GeoserverWCSGenerator extends AbstractGenerator {
  	
  	private static Logger LOGGER = LoggerFactory.getLogger(GeoserverWCSGenerator.class);
  	private String username;
  	private String password;
  	private String host;
  	private String port;
  	
  	public GeoserverWCSGenerator() {
  		
  		super();
  		this.supportedIDataTypes.add(GTRasterDataBinding.class);
  		this.supportedIDataTypes.add(GeotiffBinding.class);
  		
  		properties = WPSConfig.getInstance().getPropertiesForGeneratorClass(this.getClass().getName());
  		for(Property property : properties){
  			if(property.getName().equalsIgnoreCase("Geoserver_username")){
  				username = property.getStringValue();
  			}
  			if(property.getName().equalsIgnoreCase("Geoserver_password")){
  				password = property.getStringValue();
  			}
  			if(property.getName().equalsIgnoreCase("Geoserver_host")){
  				host = property.getStringValue();
  			}
  			if(property.getName().equalsIgnoreCase("Geoserver_port")){
  				port = property.getStringValue();
  			}
  		}
  		if(port == null){
  			port = WPSConfig.getInstance().getWPSConfig().getServer().getHostport();
  		}
  		
  		for(String supportedFormat : supportedFormats){
  			if(supportedFormat.equals("text/xml")){
  				supportedFormats.remove(supportedFormat);
  			}
  		}
  		
  	}
  	
  	@Override
  	public InputStream generateStream(IData data, String mimeType, String schema) throws IOException {
  
  		InputStream stream = null;	
  		try {
  			Document doc = storeLayer(data);
  			String xmlString = XMLUtil.nodeToString(doc);			
  			stream = new ByteArrayInputStream(xmlString.getBytes("UTF-8"));			
  	    } catch(TransformerException e){
  	    	LOGGER.error("Error generating WCS output. Reason: ", e);
  	    	throw new RuntimeException("Error generating WCS output. Reason: " + e);
  	    } catch (IOException e) {
  	    	LOGGER.error("Error generating WCS output. Reason: ", e);
  	    	throw new RuntimeException("Error generating WCS output. Reason: " + e);
  		} catch (ParserConfigurationException e) {
  	    	LOGGER.error("Error generating WCS output. Reason: ", e);
  			throw new RuntimeException("Error generating WCS output. Reason: " + e);
  		}	
  		return stream;
  	}
  	
  	private Document storeLayer(IData coll) throws HttpException, IOException, ParserConfigurationException{
  		File file = null;
  		String storeName = "";
  		
  		if(coll instanceof GTRasterDataBinding){
  			GTRasterDataBinding gtData = (GTRasterDataBinding) coll;
  			GenericFileDataWithGT fileData = new GenericFileDataWithGT(gtData.getPayload(), null);
  			file = fileData.getBaseFile(true);			
  		}
  		if(coll instanceof GeotiffBinding){
  			GeotiffBinding data = (GeotiffBinding) coll;
  			file = (File) data.getPayload();
  		}
  		
  		storeName = file.getName();			
  	
  		storeName = storeName +"_" + UUID.randomUUID();
  		GeoServerUploader geoserverUploader = new GeoServerUploader(username, password, host, port);
  		
  		String result = geoserverUploader.createWorkspace();
  		LOGGER.debug(result);
  		if(coll instanceof GTRasterDataBinding){
  			result = geoserverUploader.uploadGeotiff(file, storeName);
  		}		
  		LOGGER.debug(result);
  				
  		String capabilitiesLink = "http://"+host+":"+port+"/geoserver/wcs?Service=WCS&Request=GetCapabilities&Version=1.1.1";
  				
  		Document doc = createXML(storeName, capabilitiesLink);
  		return doc;
  	
  	}
  	
  	private Document createXML(String layerName, String getCapabilitiesLink) throws ParserConfigurationException{
  		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
  		Document doc = factory.newDocumentBuilder().newDocument();
  		
  		Element root = doc.createElement("OWSResponse");
  		root.setAttribute("type", "WMS");
  		
  		Element resourceIDElement = doc.createElement("ResourceID");
  		resourceIDElement.appendChild(doc.createTextNode(layerName));
  		root.appendChild(resourceIDElement);
  		
  		Element getCapabilitiesLinkElement = doc.createElement("GetCapabilitiesLink");
  		getCapabilitiesLinkElement.appendChild(doc.createTextNode(getCapabilitiesLink));
  		root.appendChild(getCapabilitiesLinkElement);
  		/*
  		Element directResourceLinkElement = doc.createElement("DirectResourceLink");
  		directResourceLinkElement.appendChild(doc.createTextNode(getMapRequest));
  		root.appendChild(directResourceLinkElement);
  		*/
  		doc.appendChild(root);
  		
  		return doc;
  	}
  	
  }
  