import java.io.*;
import java.net.*;

/* 
javaMailTo.java
Send email via mailto: URL
RJM Programming
February, 2018
Usage: 
Text in Body Usage: java javaMailTo [<mailhost>] [<From> [<To> [<Subject> [<TextOfBody>]]]]
Attachment Usage: uuencode <file.nam> [<attachmentfile.nam>] | java javaMailTo [<mailhost>] [<From> [<To> [<Subject>]]]
Attachments Usage: ( uuencode <file.nam> [<attachmentfile.nam>]; uuencode <file2.nam> [<attachmentfile2.nam>] ) | java javaMailTo [<mailhost>] [<From> [<To> [<Subject>]]]
Attachments Zipped Usage: zip <zipfile.nam> <file1.nam> [ <file2.nam>[ <file3.nam>]]; uuencode <zipfile.nam> [<attachmentzipfile.nam>] | java javaMailTo [<mailhost>] [<From> [<To> [<Subject>]]]
Attachment with Text Body Usage: ( echo 'Text of Body'; uuencode <file.nam> [<attachmentfile.nam>] ) | java javaMailTo [<mailhost>] [<From> [<To> [<Subject>]]]
Attachments with Text Body Usage: ( echo 'Text of Body'; uuencode <file.nam> [<attachmentfile.nam>]; uuencode <file2.nam> [<attachmentfile2.nam>] ) | java javaMailTo [<mailhost>] [<From> [<To> [<Subject>]]]
Attachments Zipped with Text Body Usage: zip <zipfile.nam> <file1.nam> [ <file2.nam>[ <file3.nam>]]; ( echo 'Text of Body'; uuencode <zipfile.nam> [<attachmentzipfile.nam>] ) | java javaMailTo [<mailhost>] [<From> [<To> [<Subject>]]]
*/

public class javaMailTo {
  public static void main(String[] args) {
    try {
      int next = 0;
      BufferedReader myIn = null;
      if (args.length >= (next + 1)) {
       if (args[next].indexOf("@") == -1) {
        System.getProperties().put("mail.host", args[next]);
        next++;
       }
      }
      
      String myFrom = "";
      String myTo = "";
      String mySubject = "";
      String myBody = "";
      String mySubjectSpare = "";
      String myBodySpare = "";
      String replyTo = "";
      String cc = "";
      String bcc = "";
      
      if (args.length >= (next + 1)) {
       myFrom = args[next];
       next++;
      } else {
       if (myIn == null) myIn = new BufferedReader(new InputStreamReader(System.in));
       System.out.print("From: ");
       myFrom = myIn.readLine();
      }
      
      if (args.length >= (next + 1)) {
       myTo = args[next];
       next++;
      } else {
       if (myIn == null) myIn = new BufferedReader(new InputStreamReader(System.in));
       System.out.print("To: ");
       myTo = myIn.readLine();
      }
      
      if (args.length >= (next + 1)) {
       mySubjectSpare = args[next];
       next++;
       if (mySubjectSpare.indexOf("@") == -1) {
         mySubject = "" + mySubjectSpare;
       } else if (cc == "") {
         if (replyTo == "") replyTo = "Reply-To: " + mySubjectSpare;
         cc = "CC: " + mySubjectSpare;
         if (args.length >= (next + 1)) {
          mySubjectSpare = args[next];
          next++;
          if (mySubjectSpare.indexOf("@") == -1) {
            mySubject = "" + mySubjectSpare;
          } else if (bcc == "") {
            bcc = "BCC: " + mySubjectSpare;
          }
         }
       }
      }
      
      if (args.length >= (next + 1) || mySubject != "") {
       if (mySubject == "") {
        mySubject = args[next];
        next++;
       }
      } else {
       if (myIn == null) myIn = new BufferedReader(new InputStreamReader(System.in));
       System.out.print("Subject: ");
       mySubject = myIn.readLine();
      }
      
      URL myU = new URL("mailto:" + myTo);
      URLConnection myC = myU.openConnection();  
      myC.setDoInput(false);
      myC.setDoOutput(true);
      System.out.println("Connecting...");
      System.out.flush();
      myC.connect();
      PrintWriter myOut = new PrintWriter(new OutputStreamWriter(myC.getOutputStream()));
      
     
      if (args.length >= (next + 1) || myBody != "") {
       if (myBody == "") {
        myBody = args[next];
        next++;
       }
       myOut.println("From: \"" + myFrom + "\" <" + 
            System.getProperty("user.name") + "@" + 
            InetAddress.getLocalHost().getHostName() + ">");
       /* if (replyTo != "") myOut.println(replyTo); */
       myOut.println("To: " + myTo);
       if (cc != "") myOut.println(cc);
       if (bcc != "") myOut.println(bcc);
       myOut.println("Subject: " + mySubject);
       myOut.println();
       myOut.println(myBody);
       
       myOut.close();
       
       System.out.println("Message sent now.");
       System.out.flush();
      } else {
       myOut.println("From: \"" + myFrom + "\" <" + 
            System.getProperty("user.name") + "@" + 
            InetAddress.getLocalHost().getHostName() + ">");
       /* if (replyTo != "") myOut.println(replyTo); */
       myOut.println("To: " + myTo);
       if (cc != "") myOut.println(cc);
       if (bcc != "") myOut.println(bcc);
       myOut.println("Subject: " + mySubject);
       myOut.println();
       System.out.println("Enter the message. " + 
            "End with a '.' on a line by itself.");
            
       if (myIn == null) myIn = new BufferedReader(new InputStreamReader(System.in));
       String myLine;
       for (;;) {
         myLine = myIn.readLine();
         if ((myLine == null) || myLine.equals(".")) break;
         myOut.println(myLine);
       }
       
       myOut.close();
       
       System.out.println("Message sent.");
       System.out.flush();
      }
      
    } catch (Exception err) {
      System.err.println(err);
      System.err.println("Text Body Usage: java javaMailTo [<mailhost>] [<From> [<To> [<Subject> [<TextOfBody>]]]]");
      System.err.println("Attachment Usage: uuencode <file.nam> [<attachmentfile.nam>] | java javaMailTo [<mailhost>] [<From> [<To> [<Subject> [<TextOfBody>]]]]");
      System.err.println("Attachments Usage: ( uuencode <file.nam> [<attachmentfile.nam>]; uuencode <file2.nam> [<attachmentfile2.nam>] ) | java javaMailTo [<mailhost>] [<From> [<To> [<Subject> [<TextOfBody>]]]]");
      System.err.println("Attachments Zipped Usage: zip <zipfile.nam> <file1.nam> [ <file2.nam>[ <file3.nam>]]; uuencode <zipfile.nam> [<attachmentzipfile.nam>] | java javaMailTo [<mailhost>] [<From> [<To> [<Subject> [<TextOfBody>]]]]");
      System.err.println("Attachment with Text Body Usage: ( echo 'Text of Body'; uuencode <file.nam> [<attachmentfile.nam>] ) | java javaMailTo [<mailhost>] [<From> [<To> [<Subject>]]]");
      System.err.println("Attachments with Text Body Usage: ( echo 'Text of Body'; uuencode <file.nam> [<attachmentfile.nam>]; uuencode <file2.nam> [<attachmentfile2.nam>] ) | java javaMailTo [<mailhost>] [<From> [<To> [<Subject>]]]");
      System.err.println("Attachments Zipped with Text Body Usage: zip <zipfile.nam> <file1.nam> [ <file2.nam>[ <file3.nam>]];  ( echo 'Text of Body'; uuencode <zipfile.nam> [<attachmentzipfile.nam>] ) | java javaMailTo [<mailhost>] [<From> [<To> [<Subject>]]]");
    }
  }
}