package de.tivsource.page.admin.actions.locations.request;
   
   import java.io.File;
   import java.io.IOException;
   import java.text.SimpleDateFormat;
   import java.util.Calendar;
   import java.util.GregorianCalendar;
   
   import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  import org.apache.struts2.ServletActionContext;
  import org.apache.struts2.convention.annotation.Action;
  import org.apache.struts2.convention.annotation.Actions;
  import org.apache.struts2.convention.annotation.Result;
  import org.apache.struts2.interceptor.ServletRequestAware;
  import org.apache.tika.Tika;
  
  import com.opensymphony.xwork2.ActionSupport;
  
  import de.tivsource.ejb3plugin.InjectEJB;
  import de.tivsource.page.dao.property.PropertyDaoLocal;
  import de.tivsource.page.dao.request.RequestDaoLocal;
  import de.tivsource.page.entity.request.Request;
  
  /**
   *
   * @author Marc Michele
   */
  public class ImageAction extends ActionSupport implements ServletRequestAware {
  
      /**
       * Generierte Versions-Kennung der Klasse.
       */
      private static final long serialVersionUID = 7367696315767291095L;
  
      private static final Logger logger = LogManager.getLogger(ImageAction.class);
  
      /**
       * Servlet-Request der die Post und Get Daten der Session enthält.
       */
      private HttpServletRequest servletRequest;
  
      @InjectEJB(name="PropertyDao")
      private PropertyDaoLocal propertyDaoLocal;
  
      @InjectEJB(name="RequestDao")
      private RequestDaoLocal requestDaoLocal;
  
      /**
       * Aktueller Antrag.
       */
      private Request request;
  
      /**
       * 
       */
      private String mimeType = "image/png";
      
      /**
       * Das Bild darf normalerweise aus dem Cache geladen werden.
       */
      private boolean cache = true;
  
      public void setServletRequest(HttpServletRequest servletRequest) {
          this.servletRequest = servletRequest;
      }
  
      /**
       * @return the request
       */
      public Request getRequest() {
          return request;
      }
  
      /**
       * @return the mimeType
       */
      public String getMimeType() {
          return mimeType;
      }
  
      /**
       * @param cache the cache to set
       */
      public void setCache(boolean cache) {
          this.cache = cache;
      }
  
      /**
       * Die Methode get() laedt eine Kategorie anhand des
       * ServletRequest-Parameters "category_id" aus der entsprechenden
       * Datenbanktabelle und speichert diese in die Variable "this.category"
       * 
       * @return SUCCESS oder ERROR (wenn Exception);
       */
      @Actions({
         @Action(
             value = "*/original",
             results = {
                 @Result(
                     name = "success", 
                     type="stream", 
                     params= { "contentType","mimeType","inputName","request.proofOfAuthorityFileInputStream"}
                 ),
                 @Result(name = "input", type="tiles", location="imageTemplate")
             }
         )
     })
     public String execute() {
         logger.trace("execute() aufgerufen.");
 
         // Lese lastModified aus der Datenbank
         String lastModified = propertyDaoLocal.findByKey("captcha.image.lastModified").getValue();
         // Hole If-Modified-Since aus der Anfrage
         String since = servletRequest.getHeader("If-Modified-Since");
         logger.info("If-Modified-Since: " + since);
 
         // Setze Fomatierung
         // "Thu, 01 Dec 1994 16:00:00 GMT"
         SimpleDateFormat simpleDateFormat = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz");
         Calendar gregorianCalendar = new GregorianCalendar();
         gregorianCalendar.add(Calendar.HOUR, 12);
         String expires = simpleDateFormat.format(gregorianCalendar.getTime());
 
         HttpServletResponse response = ServletActionContext.getResponse();
         //response.setHeader("Cache-control", "no-cache, no-store");
         //response.setHeader("Pragma", "no-cache");
 
         if(cache) {
             response.setHeader("Expires", expires);
             response.setHeader("Last-Modified", lastModified);
             response.setHeader("Retry-After", expires);
         } else {
             response.setHeader("Cache-control", "no-cache, no-store, must-revalidate");
             response.setHeader("Pragma", "no-cache");
             response.setHeader("Expires", "-1");
         }
 
         if(cache && since!=null && since.equals(lastModified)) {
             response.setStatus(304);
             return INPUT;
         }
 
         String requestUuid = ServletActionContext.getRequest().getServletPath();
 
         logger.info("Request UUID: " + requestUuid);
         requestUuid = requestUuid.replaceAll("/locations/request/", "");
         requestUuid = requestUuid.replaceAll("/original.html", "");
         logger.info("Request UUID: " + requestUuid);
 
         try {
             this.request = this.requestDaoLocal.findByUuid(requestUuid);
             Tika tika = new Tika();
             mimeType = tika.detect(new File(request.getProofOfAuthority()));
             return SUCCESS;
         } catch (NumberFormatException exception) {
             addActionError(getText("request.actionError.get.numberFormatException"));
             exception.printStackTrace();
             return ERROR;
         } catch (NullPointerException exception) {
             addActionError(getText("request.actionError.get.nullPointerException"));
             exception.printStackTrace();
             return ERROR;
         } catch (IOException exception) {
             addActionError(getText("request.actionError.get.iOException"));
             exception.printStackTrace();
             return ERROR;
         }
     }
 
 }// Ende class