/*
 * Copyright 2015-Present Entando Inc. (http://www.entando.com) All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */
package com.agiletec.plugins.jacms.aps.system.services.content.parse.extraAttribute;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

import com.agiletec.aps.system.common.entity.parse.attribute.TextAttributeHandler;
import com.agiletec.plugins.jacms.aps.system.services.content.model.extraAttribute.ResourceAttributeInterface;
import com.agiletec.plugins.jacms.aps.system.services.resource.IResourceManager;
import com.agiletec.plugins.jacms.aps.system.services.resource.model.ResourceInterface;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Classe handler per l'interpretazione della porzione di xml 
 * relativo all'attributo di tipo risorsa (Image o Attach).
 * @author E.Santoboni
 */
public class ResourceAttributeHandler extends TextAttributeHandler {
	
	private static final Logger _logger = LoggerFactory.getLogger(ResourceAttributeHandler.class);
	
	@Override
	public Object getAttributeHandlerPrototype() {
		ResourceAttributeHandler handler = (ResourceAttributeHandler) super.getAttributeHandlerPrototype();
		handler.setResourceManager(this.getResourceManager());
		return handler;
	}
	
	@Override
	public void startAttribute(Attributes attributes, String qName) throws SAXException {
		if (qName.equals("resource")) {
			this.startResource(attributes, qName);
		} else {
			super.startAttribute(attributes, qName);
		}
	}
	
	private void startResource(Attributes attributes, String qName) throws SAXException {
		String id = extractAttribute(attributes, "id", qName, true);
		String langCode = extractAttribute(attributes, "lang", qName, false);
		try {
			ResourceInterface resource = this.getResourceManager().loadResource(id);
			if (null != this.getCurrentAttr() && null != resource) {
				((ResourceAttributeInterface) this.getCurrentAttr()).setResource(resource, langCode);
			}
		} catch (Exception e) {
			_logger.error("Error loading resource {}", id, e);
		}
	}
	
	@Override
	public void endAttribute(String qName, StringBuffer textBuffer) {
		if (qName.equals("resource")) {
			this.endResource();
		} else {
			super.endAttribute(qName, textBuffer);
		}
	}
	
	private void endResource() {
		return; // nulla da fare
	}
	
	/**
	 * Restituisce il manager delle risorse.
	 * @return Il Manager delle risorse.
	 */
	protected IResourceManager getResourceManager() {
		return this._resourceManager;
	}
	
	/**
	 * Setta il Manager delle risorse.
	 * @param resourceManager Il manager delle risorse.
	 */
	public void setResourceManager(IResourceManager resourceManager) {
		this._resourceManager = resourceManager;
	}
	
	private IResourceManager _resourceManager;
	
}