de.knurt.fam.template.controller.letter.LetterGeneratorShowLetter.java Source code

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Here is the source code for de.knurt.fam.template.controller.letter.LetterGeneratorShowLetter.java

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/*
 * Copyright 2009-2012 by KNURT Systeme (http://www.knurt.de)
 *
 * Licensed under the Creative Commons License Attribution-NonCommercial-ShareAlike 3.0 Unported;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://creativecommons.org/licenses/by-nc-sa/3.0/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.knurt.fam.template.controller.letter;

import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.tools.generic.MathTool;
import org.json.JSONObject;
import org.springframework.web.servlet.ModelAndView;

import de.knurt.fam.connector.FamConnector;
import de.knurt.fam.core.aspects.logging.FamLog;
import de.knurt.fam.core.model.persist.User;
import de.knurt.fam.core.view.text.FamDateFormat;
import de.knurt.fam.template.model.TemplateResource;

/**
 * resolve a request for a letter. answer with a pdf file.
 * 
 * @author Daniel Oltmanns <info@knurt.de>
 * @since 1.4.0 (06/13/2011)
 * 
 */
public class LetterGeneratorShowLetter {

    private DateFormat df = new SimpleDateFormat("yyyyMMddHHmm");

    /**
     * a pdf file styled as defined in configuration and the content of the request. the style is defined in custom/letter_style.json (no other
     * possibility by now)
     * 
     * @param response a pdf file
     * @param request original
     * @return a pdf file styled as defined in configuration and the content of the request
     */
    public ModelAndView processGeneralLetter(HttpServletResponse response, TemplateResource tr) {
        // get template from local filesystem
        String customid = tr.getAuthUser().getUsername() + "-s";
        PostMethod post = new LetterFromHttpServletRequestToPostMethod(customid).process(tr.getRequest());
        this.processIntern(response, post, customid);
        // set invoiced
        InvoiceBookingResolver lgub = new InvoiceBookingResolver(tr);
        lgub.invoice();
        return null;
    }

    private void processIntern(HttpServletResponse response, PostMethod post, String customid) {
        //  forward response got
        //  force "save as" in browser
        String downloadFilename = this.df.format(new Date()) + "-" + customid + ".pdf";
        response.setHeader("Content-Disposition", "attachment; filename=" + downloadFilename);
        //  it is a pdf
        response.setContentType("application/pdf");
        try {
            ServletOutputStream ouputStream = response.getOutputStream();
            ouputStream.write(post.getResponseBody());
            ouputStream.flush();
            ouputStream.close();
        } catch (IOException e) {
            FamLog.exception(e, 201106131408l);
        }
    }

    public JSONObject getTermsLetterStyle(User target, String customid) {
        VelocityContext context = new VelocityContext();
        context.put("user", target);
        context.put("FamDateFormat", FamDateFormat.class);
        context.put("math", new MathTool());
        context.put("templateurl", FamConnector.getGlobalProperty("service_termspdf__templateurl"));
        context.put("customid", customid);
        return new LetterFromVelocityContextToJSONObject("custom/letter_terms_style.json").process(context);
    }

    public ModelAndView processTerms(HttpServletResponse response, User target) {
        String customid = target.getUsername() + "-terms";
        PostMethod post = new FamServicePDFResolver().process(this.getTermsLetterStyle(target, customid));
        this.processIntern(response, post, customid);
        return null;
    }

}