#include "getln.h"

#include "substdio.h"

#include "subfd.h"

#include "prioq.h"

#include "stralloc.h"

#include "str.h"

#include "exit.h"

#include "hfield.h"

#include "readwrite.h"

#include "open.h"

#include "headerbody.h"

#include "maildir.h"

#define FATAL "maildirwatch: fatal: "

void die_nomem() { strerr_die2x(111,FATAL,"out of memory"); }

stralloc recipient = {0};

stralloc sender = {0};

stralloc fromline = {0};

stralloc text = {0};

void addtext(s,n) char *s; int n;

{

 if (!stralloc_catb(&text,s,n)) die_nomem();

 if (text.len > 158) text.len = 158;

}

void dobody(h) stralloc *h; { addtext(h->s,h->len); }

void doheader(h) stralloc *h;

{

 int i;

 switch(hfield_known(h->s,h->len))

  {

   case H_SUBJECT:

     i = hfield_skipname(h->s,h->len);

     addtext(h->s + i,h->len - i);

     break;

   case H_DELIVEREDTO:

     i = hfield_skipname(h->s,h->len);

     if (i < h->len)

       if (!stralloc_copyb(&recipient,h->s + i,h->len - i - 1)) die_nomem();

     break;

   case H_RETURNPATH:

     i = hfield_skipname(h->s,h->len);

     if (i < h->len)

       if (!stralloc_copyb(&sender,h->s + i,h->len - i - 1)) die_nomem();

     break;

   case H_FROM:

     if (!stralloc_copyb(&fromline,h->s,h->len - 1)) die_nomem();

     break;

  }

}

void finishheader() { ; }

stralloc filenames = {0};

prioq pq = {0};

char inbuf[SUBSTDIO_INSIZE];

substdio ssin;

void main()

{

 struct prioq_elt pe;

 int fd;

 int i;

 if (maildir_chdir() == -1)

   strerr_die1(111,FATAL,&maildir_chdir_err);

 for (;;)

  {

   maildir_clean(&filenames);

   if (maildir_scan(&pq,&filenames,1,0) == -1)

     strerr_die1(111,FATAL,&maildir_scan_err);

   substdio_putsflush(subfdout,"\033[;H\033[;J");

   while (prioq_min(&pq,&pe))

    {

     prioq_delmin(&pq);

     fd = open_read(filenames.s + pe.id);

     if (fd == -1) continue;

     substdio_fdbuf(&ssin,read,fd,inbuf,sizeof(inbuf));

     if (!stralloc_copys(&sender,"?")) die_nomem();

     if (!stralloc_copys(&recipient,"?")) die_nomem();

     if (!stralloc_copys(&fromline,"")) die_nomem();

     if (!stralloc_copys(&text,"")) die_nomem();

     if (headerbody(&ssin,doheader,finishheader,dobody) == -1)

       strerr_die2x(111,FATAL,"trouble reading new message");

     for (i = 0;i < fromline.len;++i)

       if ((fromline.s[i] < 32) || (fromline.s[i] > 126))

         fromline.s[i] = '/';

     for (i = 0;i < sender.len;++i)

       if ((sender.s[i] < 32) || (sender.s[i] > 126))

         sender.s[i] = '?';

     for (i = 0;i < recipient.len;++i)

       if ((recipient.s[i] < 32) || (recipient.s[i] > 126))

         recipient.s[i] = '?';

     for (i = 0;i < text.len;++i)

       if ((text.s[i] < 32) || (text.s[i] > 126))

         text.s[i] = '/';

     substdio_puts(subfdout,"FROM ");

     substdio_put(subfdout,sender.s,sender.len);

     substdio_puts(subfdout," TO <");

     substdio_put(subfdout,recipient.s,recipient.len);

     substdio_puts(subfdout,">\n");

     if (fromline.len)

      {

       substdio_puts(subfdout,"\033[1m");

       substdio_put(subfdout,fromline.s,fromline.len);

       substdio_puts(subfdout,"\033[0m\n");

      }

     substdio_put(subfdout,text.s,text.len);

     substdio_puts(subfdout,"\n\n");

     close(fd);

    }

   substdio_flush(subfdout);

   sleep(30);

  }

}