#!/usr/bin/perl -w

use esmith::AccountsDB;
use esmith::ConfigDB;
use esmith::event;
use Text::Template;
use DateTime;
use Getopt::Long;

my $a = esmith::AccountsDB->open || die "Couldn't open the AccountsDB";
my $c = esmith::ConfigDB->open   || die "Couldn't open the ConfigDB";
my $domain = $c->get_value('DomainName');

my $debug   = 0;

GetOptions(
  debug    => \$debug,
);


my $service = $c->get('ExpireAccounts') ||
  $c->new_record('ExpireAccounts',
                   {
                     type   => 'service',
                     status => 'enabled'
                   }
  );

my $warn_delay        = $service->prop('WarningDelay')        || '30';
my $warn_users        = $service->prop('WarnUsers')           || 'no';
my $recipient         = $service->prop('WarningRecipient')    || 'root';
my $days_between_warn = $service->prop('DaysBetweenWarnings') || '5';

my $rem = {};
my @lock = ();

my $now = DateTime->now;

foreach my $user ($a->users){
  my $date = $user->prop('ExpiresOn') || 'never';
  if ($date eq 'never'){
    print $user->key . ": No expiration date set\n" if $debug;
    next;
  }
  elsif ($date !~ m/^(\d{4})\-(\d{1,2})\-(\d{1,2})/){
    print $user->key . ": Invalide expiration date ($date)\n" if $debug;
    next;
  }
  my $exp = DateTime->new(
    year  => $1,
    month => $2,
    day   => $3,
  );

  if ($exp < $now){
    print $user->key . ": Expiration date is passed, account must be locked\n" if $debug;
    push @lock, $user->key;
  }
  else{
    my $remaining = ($exp - $now)->in_units('days');
    print $user->key . ": Account will expire on $date ($remaining days)\n" if $debug;
    $rem->{$user->key} = $remaining if $remaining < $warn_delay;
  }
}

# Lock accounts which need to be locked now
foreach my $u (@lock){
    event_signal('user-lock', $u);
    $a->del_prop($u, 'ExpiresOn');
    $a->del_prop($u, 'ExpirationLastNotified');
}

# Send a warning for accounts which will be locked soon
my $send_warn_for = {};
foreach my $user (keys %$rem){
  my $rec = $a->get($user) || next;
  my $last_notif = $rec->prop('ExpirationLastNotified') || 'never';
  if ($last_notif =~ m/^(\d{4})\-(\d{1,2})\-(\d{1,2})/){
    $last_notif = DateTime->new(
      year  => $1,
      month => $2,
      day   => $3,
    );
    if (($last_notif - $now)->in_units('days') < $days_between_warn){
      next;
    }
  }

  my $templates = '/etc/e-smith/templates';
  my $source = '/usr/lib/smeserver-expire-accounts/userNotifAccountExpiration.tmpl';
  # Use templates-custom version by preference if it exists
  -f "${templates}-custom${source}" and $templates .= "-custom";

  if ($warn_users){
    my $t = new Text::Template(TYPE   => 'FILE',
                             SOURCE => "${templates}${source}");

    open(QMAIL, "|/var/qmail/bin/qmail-inject -fdo-not-reply\@$domain $user")
        || die "Could not send mail via qmail-inject!\n";

    print QMAIL $t->fill_in( HASH => {
      conf     => \$c,
      user     => $user,
      days     => $rem->{$user}
    });

    close QMAIL;
  }

  $rec->set_prop('ExpirationLastNotified', $now->ymd);
  # This one will be notified to the admin
  $send_warn_for->{$user} = {
    remaining => $rem->{$user},
    name      => $rec->prop('FirstName') . ' ' . $rec->prop('LastName')
  };
}

if (keys %$send_warn_for > 0){
  $templates = '/etc/e-smith/templates';
  $source = '/usr/lib/smeserver-expire-accounts/adminNotifNextExpirations.tmpl';

  # Use templates-custom version by preference if it exists
  -f "${templates}-custom${source}" and $templates .= "-custom";

  my $t = new Text::Template(TYPE   => 'FILE',
                             SOURCE => "${templates}${source}");

  open(QMAIL, "|/var/qmail/bin/qmail-inject -fdo-not-reply\@$domain $recipient")
      || die "Could not send mail via qmail-inject!\n";

  print QMAIL $t->fill_in( HASH => {
    conf    => \$c,
    users   => \$send_warn_for
  });

  close QMAIL;
}

exit 0;