csharp/client/result/SMSMMSResultParser.cs

   1 /*\r
   2 * Copyright 2008 ZXing authors\r
   3 *\r
   4 * Licensed under the Apache License, Version 2.0 (the "License");\r
   5 * you may not use this file except in compliance with the License.\r
   6 * You may obtain a copy of the License at\r
   7 *\r
   8 *      http://www.apache.org/licenses/LICENSE-2.0\r
   9 *\r
  10 * Unless required by applicable law or agreed to in writing, software\r
  11 * distributed under the License is distributed on an "AS IS" BASIS,\r
  12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  13 * See the License for the specific language governing permissions and\r
  14 * limitations under the License.\r
  15 */\r
  16 using System;\r
  17 using Result = com.google.zxing.Result;\r
  18 namespace com.google.zxing.client.result\r
  19 {\r
  20         \r
  21         /// <summary> <p>Parses an "sms:" URI result, which specifies a number to SMS and optional\r
  22         /// "via" number. See <a href="http://gbiv.com/protocols/uri/drafts/draft-antti-gsm-sms-url-04.txt">\r
  23         /// the IETF draft</a> on this.</p>\r
  24         /// \r
  25         /// <p>This actually also parses URIs starting with "mms:", "smsto:", "mmsto:", "SMSTO:", and\r
  26         /// "MMSTO:", and treats them all the same way, and effectively converts them to an "sms:" URI\r
  27         /// for purposes of forwarding to the platform.</p>\r
  28         /// \r
  29         /// </summary>\r
  30         /// <author>  Sean Owen\r
  31         /// </author>\r
  32         /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
  33         /// </author>\r
  34         sealed class SMSMMSResultParser:ResultParser\r
  35         {\r
  36                 \r
  37                 private SMSMMSResultParser()\r
  38                 {\r
  39                 }\r
  40                 \r
  41                 public static SMSParsedResult parse(Result result)\r
  42                 {\r
  43                         System.String rawText = result.Text;\r
  44                         if (rawText == null)\r
  45                         {\r
  46                                 return null;\r
  47                         }\r
  48                         int prefixLength;\r
  49                         if (rawText.StartsWith("sms:") || rawText.StartsWith("SMS:") || rawText.StartsWith("mms:") || rawText.StartsWith("MMS:"))\r
  50                         {\r
  51                                 prefixLength = 4;\r
  52                         }\r
  53                         else if (rawText.StartsWith("smsto:") || rawText.StartsWith("SMSTO:") || rawText.StartsWith("mmsto:") || rawText.StartsWith("MMSTO:"))\r
  54                         {\r
  55                                 prefixLength = 6;\r
  56                         }\r
  57                         else\r
  58                         {\r
  59                                 return null;\r
  60                         }\r
  61                         \r
  62                         // Check up front if this is a URI syntax string with query arguments\r
  63                         System.Collections.Hashtable nameValuePairs = parseNameValuePairs(rawText);\r
  64                         System.String subject = null;\r
  65                         System.String body = null;\r
  66                         bool querySyntax = false;\r
  67                         if (nameValuePairs != null && !(nameValuePairs.Count == 0))\r
  68                         {\r
  69                                 subject = ((System.String) nameValuePairs["subject"]);\r
  70                                 body = ((System.String) nameValuePairs["body"]);\r
  71                                 querySyntax = true;\r
  72                         }\r
  73                         \r
  74                         // Drop sms, query portion\r
  75                         //UPGRADE_WARNING: Method 'java.lang.String.indexOf' was converted to 'System.String.IndexOf' which may throw an exception. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1101'"\r
  76                         int queryStart = rawText.IndexOf('?', prefixLength);\r
  77                         System.String smsURIWithoutQuery;\r
  78                         // If it's not query syntax, the question mark is part of the subject or message\r
  79                         if (queryStart < 0 || !querySyntax)\r
  80                         {\r
  81                                 smsURIWithoutQuery = rawText.Substring(prefixLength);\r
  82                         }\r
  83                         else\r
  84                         {\r
  85                                 smsURIWithoutQuery = rawText.Substring(prefixLength, (queryStart) - (prefixLength));\r
  86                         }\r
  87                         int numberEnd = smsURIWithoutQuery.IndexOf(';');\r
  88                         System.String number;\r
  89                         System.String via;\r
  90                         if (numberEnd < 0)\r
  91                         {\r
  92                                 number = smsURIWithoutQuery;\r
  93                                 via = null;\r
  94                         }\r
  95                         else\r
  96                         {\r
  97                                 number = smsURIWithoutQuery.Substring(0, (numberEnd) - (0));\r
  98                                 System.String maybeVia = smsURIWithoutQuery.Substring(numberEnd + 1);\r
  99                                 if (maybeVia.StartsWith("via="))\r
 100                                 {\r
 101                                         via = maybeVia.Substring(4);\r
 102                                 }\r
 103                                 else\r
 104                                 {\r
 105                                         via = null;\r
 106                                 }\r
 107                         }\r
 108                         \r
 109                         // Thanks to dominik.wild for suggesting this enhancement to support\r
 110                         // smsto:number:body URIs\r
 111                         if (body == null)\r
 112                         {\r
 113                                 int bodyStart = number.IndexOf(':');\r
 114                                 if (bodyStart >= 0)\r
 115                                 {\r
 116                                         body = number.Substring(bodyStart + 1);\r
 117                                         number = number.Substring(0, (bodyStart) - (0));\r
 118                                 }\r
 119                         }\r
 120                         return new SMSParsedResult("sms:" + number, number, via, subject, body, null);\r
 121                 }\r
 122         }\r
 123 }