/* $Id: mail.c,v 1.1 2001/02/18 22:11:34 reinelt Exp $
 *
 * email specific functions
 *
 * Copyright 2001 by Axel Ehnert <Axel@Ehnert.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 * $Log: mail.c,v $
 * Revision 1.1  2001/02/18 22:11:34  reinelt
 * *** empty log message ***
 *
 */

/* 
 * exported functions:
 *
 * Mail (int index, int *num)
 *   returns 0 if ok, -1 if error
 *   sets num to number of emails in mailbox #index
 *
 */

#define FALSE 0
#define TRUE 1

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/time.h>

#include "cfg.h"
#include "debug.h"
#include "mail.h"

int Mail (int index, int *num)
{
  FILE *fstr;
  char buffer[32];
  static time_t cntfreq[MAILBOXES+1];     // Time of last calculation
  static int cfgmbx[MAILBOXES+1]={[0 ... MAILBOXES]=TRUE,};
  char *fnp1;
  int v1=0;
  int last_line_blank1;                   // Was the last line blank?
  int interv=-1;                          // Interval in sec.
  char *cinterv;

  char *txt;
  char txt1[100];

  if (index<1 || index>MAILBOXES) return -1;
  /*
    Interval set?
  */  
  if (interv < 0) {
    cinterv = cfg_get("pollintmail");
    if ( cinterv == NULL ) {
      interv=DEFMAILPOLLEXT;
    }
    else {
      interv = atoi(cinterv);  
    }
  }
  /*
    Is it time to look into the files?
  */
  if (time(NULL)>cntfreq[index]+interv-1) {
    cntfreq[index]=time(NULL);
  }
  else {
    return 0;
  }
  /*
    Reread pollext, because it could be changed due to reading a new conf file
  */
  cinterv = cfg_get("pollintmail");
  if ( cinterv == NULL ) {
    interv=DEFMAILPOLLEXT;
  }
  else {
    interv = atoi(cinterv);  
  }
  /*
    Build the filename from the config
  */
  snprintf(buffer, 32, "Mailbox%d", index);
  fnp1=cfg_get(buffer);
  if (fnp1==NULL || *fnp1=='\0') {
    cfgmbx[index]=FALSE;
  }
  v1=0;
  /*
    Open the file
  */
  if (cfgmbx[index]==TRUE) {
    fstr=fopen(fnp1,"r");

    if (fstr != NULL) {
      txt=&txt1[0];
      last_line_blank1=TRUE;

      while ( ( fgets ( txt1, 100, fstr ) ) != NULL ) {
        txt1[strlen(txt1)-1]='\0';                 // cut the newline
	/*
	  Is there a "From ..." line. Count only, if a blank line was directly before this
	*/
        if ( strncmp (txt1, "From ", 5 ) == 0 ) {
          if ( last_line_blank1 == TRUE ) {
            v1++;
            debug ("mailbox%d found mail %d",index, v1);
            last_line_blank1 = FALSE;
          }
        }
        if ( strlen (txt1) == 0 ) {
	  last_line_blank1 = TRUE;
        }
        else {
	  last_line_blank1 = FALSE;
        }
      }
    }
    fclose (fstr);
  }
  *cnt=v1;
  return (0);
}