/*
    * Licensed under the GPL License. You may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *   https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
    *
    * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
    * WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
    * PURPOSE.
   */
  package psiprobe.controllers;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.catalina.Context;
  import org.springframework.web.bind.ServletRequestUtils;
  import org.springframework.web.servlet.ModelAndView;
  
  /**
   * Base class for all controllers requiring "webapp" request parameter.
   */
  public abstract class AbstractContextHandlerController extends AbstractTomcatContainerController {
  
    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest request,
        HttpServletResponse response) throws Exception {
  
      String contextName = ServletRequestUtils.getStringParameter(request, "webapp");
      Context context = null;
      if (contextName != null) {
        contextName = getContainerWrapper().getTomcatContainer().formatContextName(contextName);
        context = getContainerWrapper().getTomcatContainer().findContext(contextName);
      }
  
      if (context != null || isContextOptional()) {
        return handleContext(contextName, context, request, response);
      }
      if (contextName != null) {
        request.setAttribute("errorMessage", getMessageSourceAccessor()
            .getMessage("probe.src.contextDoesntExist", new Object[] {contextName}));
      }
  
      return new ModelAndView("errors/paramerror");
    }
  
    /**
     * Checks if is context optional.
     *
     * @return true, if is context optional
     */
    protected boolean isContextOptional() {
      return false;
    }
  
    /**
     * Handle context.
     *
     * @param contextName the context name
     * @param context the context
     * @param request the request
     * @param response the response
     *
     * @return the model and view
     *
     * @throws Exception the exception
     */
    protected abstract ModelAndView handleContext(String contextName, Context context,
        HttpServletRequest request, HttpServletResponse response) throws Exception;
  }