content: /*
   * Copyright 2007 ZXing authors
   *
   * 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 com.ailiwean.core.zxing.core.client.result;
  
  import com.ailiwean.core.zxing.core.Result;
  
  import java.util.regex.Pattern;
  
  /**
   * Implements the "MATMSG" email message entry format.
   *
   * Supported keys: TO, SUB, BODY
   *
   * @author Sean Owen
   */
  public final class EmailDoCoMoResultParser extends AbstractDoCoMoResultParser {
  
    private static final Pattern ATEXT_ALPHANUMERIC = Pattern.compile("[a-zA-Z0-9@.!#$%&'*+\\-/=?^_`{|}~]+");
  
    @Override
    public EmailAddressParsedResult parse(Result result) {
      String rawText = getMassagedText(result);
      if (!rawText.startsWith("MATMSG:")) {
        return null;
      }
      String[] tos = matchDoCoMoPrefixedField("TO:", rawText);
      if (tos == null) {
        return null;
      }
      for (String to : tos) {
        if (!isBasicallyValidEmailAddress(to)) {
          return null;
        }
      }
      String subject = matchSingleDoCoMoPrefixedField("SUB:", rawText, false);
      String body = matchSingleDoCoMoPrefixedField("BODY:", rawText, false);
      return new EmailAddressParsedResult(tos, null, null, subject, body);
    }
  
    /**
     * This implements only the most basic checking for an email address's validity -- that it contains
     * an '@' and contains no characters disallowed by RFC 2822. This is an overly lenient definition of
     * validity. We want to generally be lenient here since this class is only intended to encapsulate what's
     * in a barcode, not "judge" it.
     */
    static boolean isBasicallyValidEmailAddress(String email) {
      return email != null && ATEXT_ALPHANUMERIC.matcher(email).matches() && email.indexOf('@') >= 0;
    }
  
  }
  