/*
    * #%L
    * Bitrepository Webclient
    * %%
    * Copyright (C) 2010 - 2012 The State and University Library, The Royal Library and The State Archives, Denmark
    * %%
    * This program 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 program 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 General Lesser Public License for more details.
   * 
   * You should have received a copy of the GNU General Lesser Public 
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/lgpl-2.1.html>.
   * #L%
   */
  package org.bitrepository.webservice;
  
  import java.net.MalformedURLException;
  import java.net.URL;
  
  public class WebserviceInputChecker {
  
      public static void checkFileIDParameter(String fileID) throws WebserviceIllegalArgumentException {
          if(fileID == null || fileID.isEmpty()) {
              throw new WebserviceIllegalArgumentException("Failure: missing fileID parameter."); 
          }
      }
  
      public static void checkFileSizeParameter(String fileSize) throws WebserviceIllegalArgumentException {
          if(fileSize == null || fileSize.isEmpty()) {
              throw new WebserviceIllegalArgumentException("Failure: missing filesize");
          }
          try {
              Long.parseLong(fileSize);
          } catch (Exception e) {
              throw new WebserviceIllegalArgumentException("Failure: " + fileSize + " is not a valid number value");
          }
      }
  
      public static void checkURLParameter(String URL) throws WebserviceIllegalArgumentException {
          if(URL == null || URL.isEmpty()) {
              throw new  WebserviceIllegalArgumentException("Failure: missing url parameter.");
          }
          @SuppressWarnings("unused")
          URL url;
          try {
              url = new URL(URL);
          } catch (MalformedURLException e) {
              throw new  WebserviceIllegalArgumentException("Failure: malformed url parameter.");
          }
      }
  
      public static void checkChecksumTypeParameter(String checksumType) throws WebserviceIllegalArgumentException {
          if(checksumType == null || checksumType.isEmpty()) {
              throw new WebserviceIllegalArgumentException("Failure: missing checksumType parameter."); 
          }
          // check for supported types?
      }
  
      public static void checkPillarIDParameter(String pillarID) throws WebserviceIllegalArgumentException {
          if(pillarID == null || pillarID.isEmpty()) {
              throw new WebserviceIllegalArgumentException("Failure: missing pillarID parameter."); 
          }
      }
  
      public static void checkChecksumParameter(String checksum) throws WebserviceIllegalArgumentException {
          if(checksum != null && !checksum.isEmpty()) {
              if((checksum.length() % 2) != 0) {
                  throw new WebserviceIllegalArgumentException("Failure: checksum parameter contains an uneven number of characters.");
              }
              if(!checksum.matches("^\\p{XDigit}*$")) {
                  throw new WebserviceIllegalArgumentException("Failure: checksum parameter contains a non hexadecimal value.");
              }
          }    
      }
  
      public static void checkSaltParameter(String salt) throws WebserviceIllegalArgumentException {
          if(salt != null && !salt.isEmpty()) {
              if((salt.length() % 2) != 0) {
                  throw new WebserviceIllegalArgumentException("Failure: salt parameter contains an uneven number of characters.");
              }
              if(!salt.matches("^\\p{XDigit}*$")) {
                  throw new WebserviceIllegalArgumentException("Failure: salt parameter contains a non hexadecimal value.");
              }
          }    
      }
  }