content: /*
   * Copyright (C) 2013 MILLAU Julien
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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 io.github.tapcard.emvnfccard.utils;
  
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Calendar;
  import java.util.Locale;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import io.github.tapcard.emvnfccard.log.Logger;
  import io.github.tapcard.emvnfccard.log.LoggerFactory;
  
  import io.github.tapcard.emvnfccard.iso7816emv.EmvTags;
  import io.github.tapcard.emvnfccard.model.EmvCard;
  import io.github.tapcard.emvnfccard.model.Service;
  
  import io.github.tapcard.emvnfccard.utils.BytesUtils;
  
  /**
   * Extract track data
   * 
   * @author MILLAU Julien
   * 
   */
  public final class TrackUtils {
  
  	/**
  	 * Class logger
  	 */
  	private static final Logger LOGGER = LoggerFactory.getLogger(TrackUtils.class);
  
  	/**
  	 * Track 2 pattern
  	 */
  	private static final Pattern TRACK2_PATTERN = Pattern.compile("([0-9]{1,19})D([0-9]{4})([0-9]{3})?(.*)");
  
  	/**
  	 * Extract track 2 data
  	 * 
  	 * @param pEmvCard
  	 *            Object card representation
  	 * @param pData
  	 *            data to parse
  	 * @return true if the extraction succeed false otherwise
  	 */
  	public static boolean extractTrack2Data(final EmvCard pEmvCard, final byte[] pData) {
  		boolean ret = false;
  		byte[] track2 = TlvUtil.getValue(pData, EmvTags.TRACK_2_EQV_DATA, EmvTags.TRACK2_DATA);
  
  		if (track2 != null) {
  			String data = BytesUtils.bytesToStringNoSpace(track2);
  			Matcher m = TRACK2_PATTERN.matcher(data);
  			// Check pattern
  			if (m.find()) {
  				// read card number
  				pEmvCard.setCardNumber(m.group(1));
  				// Read expire date
  				SimpleDateFormat sdf = new SimpleDateFormat("yyMM", Locale.getDefault());
  				try {
  					pEmvCard.setExpireDate(CommonsUtils.truncate(sdf.parse(m.group(2)), Calendar.MONTH));
  				} catch (ParseException e) {
  					LOGGER.error("Unparsable expire card date : {}", e);
  					return ret;
  				}
  				// Read service
  				pEmvCard.setService(new Service(m.group(3)));
  				ret = true;
  			}
  		}
  		return ret;
  	}
  
  	/**
  	 * Private constructor
  	 */
  	private TrackUtils() {
  	}
  
  }
  