content: /*
   * Copyright 2008 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.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  
  /**
   * <p>Parses an "sms:" URI result, which specifies a number to SMS.
   * See <a href="http://tools.ietf.org/html/rfc5724"> RFC 5724</a> on this.</p>
   *
   * <p>This class supports "via" syntax for numbers, which is not part of the spec.
   * For example "+12125551212;via=+12124440101" may appear as a number.
   * It also supports a "subject" query parameter, which is not mentioned in the spec.
   * These are included since they were mentioned in earlier IETF drafts and might be
   * used.</p>
   *
   * <p>This actually also parses URIs starting with "mms:" and treats them all the same way,
   * and effectively converts them to an "sms:" URI for purposes of forwarding to the platform.</p>
   *
   * @author Sean Owen
   */
  public final class SMSMMSResultParser extends ResultParser {
  
    @Override
    public SMSParsedResult parse(Result result) {
      String rawText = getMassagedText(result);
      if (!(rawText.startsWith("sms:") || rawText.startsWith("SMS:") ||
            rawText.startsWith("mms:") || rawText.startsWith("MMS:"))) {
        return null;
      }
  
      // Check up front if this is a URI syntax string with query arguments
      Map<String,String> nameValuePairs = parseNameValuePairs(rawText);
      String subject = null;
      String body = null;
      boolean querySyntax = false;
      if (nameValuePairs != null && !nameValuePairs.isEmpty()) {
        subject = nameValuePairs.get("subject");
        body = nameValuePairs.get("body");
        querySyntax = true;
      }
  
      // Drop sms, query portion
      int queryStart = rawText.indexOf('?', 4);
      String smsURIWithoutQuery;
      // If it's not query syntax, the question mark is part of the subject or message
      if (queryStart < 0 || !querySyntax) {
        smsURIWithoutQuery = rawText.substring(4);
      } else {
        smsURIWithoutQuery = rawText.substring(4, queryStart);
      }
  
      int lastComma = -1;
      int comma;
      List<String> numbers = new ArrayList<>(1);
      List<String> vias = new ArrayList<>(1);
      while ((comma = smsURIWithoutQuery.indexOf(',', lastComma + 1)) > lastComma) {
        String numberPart = smsURIWithoutQuery.substring(lastComma + 1, comma);
        addNumberVia(numbers, vias, numberPart);
        lastComma = comma;
      }
      addNumberVia(numbers, vias, smsURIWithoutQuery.substring(lastComma + 1));    
  
      return new SMSParsedResult(numbers.toArray(EMPTY_STR_ARRAY),
                                 vias.toArray(EMPTY_STR_ARRAY),
                                 subject,
                                 body);
    }
  
    private static void addNumberVia(Collection<String> numbers,
                                     Collection<String> vias,
                                     String numberPart) {
      int numberEnd = numberPart.indexOf(';');
      if (numberEnd < 0) {
        numbers.add(numberPart);
        vias.add(null);
      } else {
        numbers.add(numberPart.substring(0, numberEnd));
        String maybeVia = numberPart.substring(numberEnd + 1);
        String via;
        if (maybeVia.startsWith("via=")) {
          via = maybeVia.substring(4);
        } else {
          via = null;
        }
        vias.add(via);
      }
    }
  
  }
  