Subj : Reading the scan_ptr for the 'mail sub'
To   : Nightfox
From : Digital Man
Date : Sun Mar 22 2015 08:57 pm

  Re: Reading the scan_ptr for the 'mail sub'
  By: Nightfox to Khelair on Sun Mar 22 2015 08:29 am

 >   Re: Reading the scan_ptr for the 'mail sub'
 >   By: Khelair to All on Sat Mar 21 2015 10:42:31
 >
 >  Kh> While implementing a new mail interface for my shell, it appears that
 >  Kh> I'm  not able to utilize the scan_ptr in the same way that I have been
 >  Kh> using in  the message base interface that I've done... There, I was
 >  Kh> utilizing  msg_area.sub[bbs.cursub_code].whatever... Here, even when I
 >  Kh> specify  manually msg_area.sub['mail'].scan_ptr, I still find it
 >  Kh> undefined. Can  anybody tell me if there is a different way to go about
 >  Kh> locating the  current message/scan_ptr in mail or should I get ready to
 >  Kh> toss up some  code snippets?
 >
 > I've been working on a new message reader, and I've found that the msg_area,
 > and it seems to me that the "mail" is a special case in that the
 > msg_area.grp, msg_ara.sub, etc. arrays don't seem to be defined for the
 > "mail" area.  Those arrays seem to be only defined for the sub-boards.  So,
 > I don't think there is a last-read pointer, etc. defined for the "mail"
 > area.  If you want to find the last read message for a user in the "mail"
 > area, you'll need to go through all messages in the "mail" area, look for
 > the ones written to the current logged-in user, and look at the 'attr' field
 > in the message headers and find the last one that has the MSG_READ attribute
 > set.  For example, something like this:
 >
 > var msgbase = new MsgBase("mail");
 > if (msgbase.is_open)
 > {
 >    var lastReadMsgIdx = 0;
 >    for (var i = 0; i < msgbase.total_msgs; ++i)
 >    {
 >       var msgHdr = msgbase.get_msg_header(true, i, true);
 >       if ((msgHdr.to_ext == user.number) && ((msgHdr.attr & MSG_READ) ==
 > MSG_READ))
 >          lastReadMsgIdx = i;
 >    }
 >    msgbase.close();
 > }
 > else
 >    console.print("Uh-oh, failed to open personal mail!\r\n\1p");

Users can read their mail out-of-order, so the concept of "lastReadMsgIdx" 
doesn't really apply here.

                                            digital man

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