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/* $Cambridge: hermes/src/prayer/cmd/cmd_checkpoint.c,v 1.3 2008/09/16 09:59:55 dpc22 Exp $ */
/************************************************
* Prayer - a Webmail Interface *
************************************************/
/* Copyright (c) University of Cambridge 2000 - 2008 */
/* See the file NOTICE for conditions of use and distribution. */
#include "prayer_session.h"
/* Unix Date conversion is ghastly. Stole following from c-client */
static char *current_time(void)
{
static char current[64];
time_t tn = time(0);
struct tm *t = gmtime(&tn);
int zone = t->tm_hour * 60 + t->tm_min;
int julian = t->tm_yday;
t = localtime(&tn); /* get local time now */
/* minus UTC minutes since midnight */
zone = t->tm_hour * 60 + t->tm_min - zone;
/* julian can be one of:
* 36x local time is December 31, UTC is January 1, offset -24 hours
* 1 local time is 1 day ahead of UTC, offset +24 hours
* 0 local time is same day as UTC, no offset
* -1 local time is 1 day behind UTC, offset -24 hours
* -36x local time is January 1, UTC is December 31, offset +24 hours
*/
if ((julian = t->tm_yday - julian) != 0)
zone += ((julian < 0) == (abs(julian) == 1)) ? -24 * 60 : 24 * 60;
/* output the time */
sprintf(current, "%02d:%02d:%02d %+03d%02d",
t->tm_hour, t->tm_min, t->tm_sec, zone / 60, abs(zone) % 60);
return (current);
}
void cmd_checkpoint(struct session *session)
{
struct request *request = session->request;
MAILSTREAM *stream = session->stream;
struct msgmap *zm = session->zm;
unsigned long count = zm->nmsgs;
time_t last, now;
if (stream == session->inbox_stream)
last = session->inbox_last_ping_time;
else if (stream == session->draft_stream)
last = session->draft_last_ping_time;
else
last = session->other_last_ping_time;
now = time(NIL);
if ((last > 0) && (now > last) && ((now - last) < 5)) {
/* Prevent denial of service attack */
session_message(session, "No new mail at %s", current_time());
session_redirect(session, request, "list");
return;
}
if (!ml_check(session, stream)) {
session_redirect(session, request, "restart");
return;
}
msgmap_update(session->zm);
if (stream == session->inbox_stream)
session->inbox_last_ping_time = now;
else if (stream == session->draft_stream)
session->draft_last_ping_time = now;
else
session->other_last_ping_time = now;
if (zm->nmsgs > count) {
session->current = zm->nmsgs;
session_message(session, "New mail has arrived at %s",
current_time());
session_redirect(session, request, "list");
} else {
session_message(session, "No new mail at %s", current_time());
session_redirect(session, request, "list");
}
}
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