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1 package nabble.model;
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2
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3 import fschmidt.util.mail.Content;
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4 import fschmidt.util.mail.Mail;
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5 import fschmidt.util.mail.MailAddress;
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6 import fschmidt.util.mail.MailHome;
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7 import fschmidt.util.mail.MailParseException;
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8 import fschmidt.util.mail.MixedMultipartContent;
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9 import fschmidt.util.mail.PlainTextContent;
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10 import org.slf4j.Logger;
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11 import org.slf4j.LoggerFactory;
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12
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13 import java.util.ArrayList;
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14 import java.util.Date;
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15 import java.util.List;
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16
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17
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18 final class MailSubsystem {
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19 private static final Logger logger = LoggerFactory.getLogger(MailSubsystem.class);
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20
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21 private MailSubsystem() {} // never
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22
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23 /**
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24 * Send an error message.
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25 *
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26 * @param mail a mail caused a message, may be null
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27 * @param mailTo sent error message to
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28 * @param subject message subject
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29 * @param errorText error text
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30 */
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31 static void sendErrorMail(Mail mail, MailAddress mailTo, String subject, String errorText) {
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32 Mail errMail = MailHome.newMail();
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33 errMail.setFrom(new MailAddress(ModelHome.noReply));
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34 errMail.setTo(mailTo);
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35 errMail.setSubject(subject);
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36 errMail.setSentDate(new Date());
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37 Content content = (mail != null) ?
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38 new MixedMultipartContent(new Content[]{
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39 new PlainTextContent(errorText),
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40 mail,
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41 }) :
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42 new MixedMultipartContent(new Content[]{
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43 new PlainTextContent(errorText)
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44 });
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45 errMail.setContent(content);
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46 ModelHome.send(errMail);
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47 }
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48
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49 /*
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50 static String stripBrackets(String s) {
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51 if (s == null) return null;
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52 int start = s.lastIndexOf('<');
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53 int end = s.lastIndexOf('>');
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54 if (start >= 0 && end > start)
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55 s = s.substring(start + 1, end);
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56 return s.trim();
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57 }
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58 */
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59 static String stripBrackets(String s) {
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60 int start = s.lastIndexOf('<');
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61 int end = s.indexOf('>');
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62 if( start == -1 && end == -1 )
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63 return s;
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64 if( start == -1 || end < start )
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65 throw new MailParseException("no brackets found in '"+s+"'");
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66 return s.substring(start + 1, end);
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67 }
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68
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69 static List<String> stripMultiBrackets(final String s) {
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70 List<String> list = new ArrayList<String>();
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71 for( int i=0; i<s.length(); ) {
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72 int start = s.indexOf('<',i);
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73 int end = s.indexOf('>',i);
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74 if( start == -1 && end == -1 )
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75 break;
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76 if( start == -1 || end < start )
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77 throw new MailParseException("malformed brackets found in '"+s+"'");
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78 list.add( s.substring(start + 1, end) );
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79 i = end + 1;
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80 }
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81 return list;
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82 }
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83
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84
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85
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86
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87 /**
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88 * Prepare message headers for sending
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89 *
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90 * @param mail to prepare
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91 * @param node node to be sent
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92 */
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93 static void setHeaders(Mail mail, NodeImpl node) {
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94 mail.setSentDate(new Date());
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95 mail.setMessageID("<" + node.getOrGenerateMessageID() + ">");
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96 NodeImpl parent = node.getParentImpl();
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97 if (parent != null && parent.getKind() != Node.Kind.APP) {
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98 mail.setHeader("In-Reply-To", "<" + parent.getOrGenerateMessageID() + ">");
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99 mail.setHeader("References", getReferences(parent, 0).trim());
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100 }
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101 }
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102
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103 private static final int MAX_REFERENCES = 10;
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104
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105 private static String getReferences(NodeImpl node, int count) {
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106 return (node == null || node.getKind() == Node.Kind.APP || count==MAX_REFERENCES) ?
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107 "" :
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108 getReferences(node.getParentImpl(), count+1) + " <" + node.getOrGenerateMessageID() + ">";
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109 }
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110
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111
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112 static String getReturnPath(Mail mail) {
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113 String[] a = mail.getHeader("Return-path");
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114 return a==null ? null : MailSubsystem.stripBrackets(a[0]);
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115 }
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116
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117 static void bounce(Mail mail,String msg) {
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118 Mail bounce = MailHome.newMail();
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119 bounce.setFrom( new MailAddress(ModelHome.noReply,"Nabble") );
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120 bounce.setTo( new MailAddress(getReturnPath(mail)) );
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121 bounce.setSubject( "Delivery Status Notification (Failure)" );
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122 bounce.setHeader( "X-Failed-Recipients", mail.getHeader("Envelope-To") );
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123 StringBuilder content = new StringBuilder();
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124 content
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125 .append( msg )
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126 .append( "\n----- Original message -----\n\n" )
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127 .append( mail.getRawInput() )
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128 ;
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129 bounce.setContent(new PlainTextContent(content.toString()));
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130 ModelHome.send(bounce);
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131 }
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132 }
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133
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