csharp/client/result/EmailDoCoMoResultParser.cs

   1 /*\r
   2 * Copyright 2007 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> Implements the "MATMSG" email message entry format.\r
  22         /// \r
  23         /// Supported keys: TO, SUB, BODY\r
  24         /// \r
  25         /// </summary>\r
  26         /// <author>  Sean Owen\r
  27         /// </author>\r
  28         /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
  29         /// </author>\r
  30         sealed class EmailDoCoMoResultParser:AbstractDoCoMoResultParser\r
  31         {\r
  32                 \r
  33                 //UPGRADE_NOTE: Final was removed from the declaration of 'ATEXT_SYMBOLS'. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"\r
  34                 private static readonly char[] ATEXT_SYMBOLS = new char[]{'@', '.', '!', '#', '$', '%', '&', '\'', '*', '+', '-', '/', '=', '?', '^', '_', '`', '{', '|', '}', '~'};\r
  35                 \r
  36                 public static EmailAddressParsedResult parse(Result result)\r
  37                 {\r
  38                         System.String rawText = result.Text;\r
  39                         if (rawText == null || !rawText.StartsWith("MATMSG:"))\r
  40                         {\r
  41                                 return null;\r
  42                         }\r
  43                         System.String[] rawTo = matchDoCoMoPrefixedField("TO:", rawText, true);\r
  44                         if (rawTo == null)\r
  45                         {\r
  46                                 return null;\r
  47                         }\r
  48                         System.String to = rawTo[0];\r
  49                         if (!isBasicallyValidEmailAddress(to))\r
  50                         {\r
  51                                 return null;\r
  52                         }\r
  53                         System.String subject = matchSingleDoCoMoPrefixedField("SUB:", rawText, false);\r
  54                         System.String body = matchSingleDoCoMoPrefixedField("BODY:", rawText, false);\r
  55                         return new EmailAddressParsedResult(to, subject, body, "mailto:" + to);\r
  56                 }\r
  57                 \r
  58                 /// <summary> This implements only the most basic checking for an email address's validity -- that it contains\r
  59                 /// an '@' contains no characters disallowed by RFC 2822. This is an overly lenient definition of\r
  60                 /// validity. We want to generally be lenient here since this class is only intended to encapsulate what's\r
  61                 /// in a barcode, not "judge" it.\r
  62                 /// </summary>\r
  63                 internal static bool isBasicallyValidEmailAddress(System.String email)\r
  64                 {\r
  65                         if (email == null)\r
  66                         {\r
  67                                 return false;\r
  68                         }\r
  69                         bool atFound = false;\r
  70                         for (int i = 0; i < email.Length; i++)\r
  71                         {\r
  72                                 char c = email[i];\r
  73                                 if ((c < 'a' || c > 'z') && (c < 'A' || c > 'Z') && (c < '0' || c > '9') && !isAtextSymbol(c))\r
  74                                 {\r
  75                                         return false;\r
  76                                 }\r
  77                                 if (c == '@')\r
  78                                 {\r
  79                                         if (atFound)\r
  80                                         {\r
  81                                                 return false;\r
  82                                         }\r
  83                                         atFound = true;\r
  84                                 }\r
  85                         }\r
  86                         return atFound;\r
  87                 }\r
  88                 \r
  89                 private static bool isAtextSymbol(char c)\r
  90                 {\r
  91                         for (int i = 0; i < ATEXT_SYMBOLS.Length; i++)\r
  92                         {\r
  93                                 if (c == ATEXT_SYMBOLS[i])\r
  94                                 {\r
  95                                         return true;\r
  96                                 }\r
  97                         }\r
  98                         return false;\r
  99                 }\r
 100         }\r
 101 }