package org.argeo.connect.ui.widgets;
   
   import javax.jcr.Item;
   import javax.jcr.Node;
   import javax.jcr.Property;
   import javax.jcr.RepositoryException;
   
   import org.argeo.cms.CmsException;
   import org.argeo.cms.text.TextInterpreter;
  import org.argeo.docbook.jcr.DocBookNames;
  import org.argeo.docbook.jcr.DocBookTypes;
  
  /** Based on HTML with a few Wiki-like shortcuts. */
  public class DbkTextInterpreter implements TextInterpreter {
  
  	@Override
  	public void write(Item item, String content) {
  		try {
  			if (item instanceof Node) {
  				Node node = (Node) item;
  				if (node.isNodeType(DocBookTypes.PARA)) {
  					String raw = convertToStorage(node, content);
  					validateBeforeStoring(raw);
  					Node jcrText;
  					if (!node.hasNode(DocBookNames.JCR_XMLTEXT))
  						jcrText = node.addNode(DocBookNames.JCR_XMLTEXT, DocBookTypes.XMLTEXT);
  					else
  						jcrText = node.getNode(DocBookNames.JCR_XMLTEXT);
  					jcrText.setProperty(DocBookNames.JCR_XMLCHARACTERS, raw);
  				} else {
  					throw new CmsException("Don't know how to interpret " + node);
  				}
  			} else {// property
  				Property property = (Property) item;
  				property.setValue(content);
  			}
  			// item.getSession().save();
  		} catch (RepositoryException e) {
  			throw new CmsException("Cannot set content on " + item, e);
  		}
  	}
  
  	@Override
  	public String read(Item item) {
  		try {
  			String raw = raw(item);
  			return convertFromStorage(item, raw);
  		} catch (RepositoryException e) {
  			throw new CmsException("Cannot get " + item + " for edit", e);
  		}
  	}
  
  	@Override
  	public String raw(Item item) {
  		try {
  			item.getSession().refresh(true);
  			if (item instanceof Node) {
  				Node node = (Node) item;
  				if (node.isNodeType(DocBookTypes.PARA)) {
  					// WORKAROUND FOR BROKEN PARARAPHS
  					// if (!node.hasProperty(CMS_CONTENT)) {
  					// node.setProperty(CMS_CONTENT, "");
  					// node.getSession().save();
  					// }
  					Node jcrText = node.getNode(DocBookNames.JCR_XMLTEXT);
  					return jcrText.getProperty(DocBookNames.JCR_XMLCHARACTERS).getString();
  				} else {
  					throw new CmsException("Don't know how to interpret " + node);
  				}
  			} else {// property
  				Property property = (Property) item;
  				return property.getString();
  			}
  		} catch (RepositoryException e) {
  			throw new CmsException("Cannot get " + item + " content", e);
  		}
  	}
  
  	// EXTENSIBILITY
  	/**
  	 * To be overridden, in order to make sure that only valid strings are being
  	 * stored.
  	 */
  	protected void validateBeforeStoring(String raw) {
  	}
  
  	/** To be overridden, in order to support additional formatting. */
  	protected String convertToStorage(Item item, String content) throws RepositoryException {
  		return content;
  
  	}
  
  	/** To be overridden, in order to support additional formatting. */
  	protected String convertFromStorage(Item item, String content) throws RepositoryException {
  		return content;
  	}
  }