Bio::GMOD::Admin::Monitor - Monitor the status of an installed MOD

package Bio::GMOD::Admin::Monitor;

use strict;
use vars qw/@ISA/;
use Bio::GMOD;
#use Bio::GMOD::Util::Email;
use Bio::GMOD::Util::Rearrange;

@ISA = qw/Bio::GMOD Bio::GMOD::Util::Email/;

# A simple generic new method - no need to reload a MOD adaptor
# since most monitoring options are site-specific
sub new {
  my ($class,@p) = @_;
  my ($mod) = rearrange([qw/MOD/],@p);
  if ($mod) {
    my $gmod = Bio::GMOD->new(-mod=>$mod,-class=>$class);
    return $gmod;
  } else {
    my $this   = bless {},$class;
    return $this;
  }
}

sub generate_report {
  my ($self,@p) = @_;
  my ($email_report,$log_report,$components,$email_to_ok,$email_to_warn,$email_from,$email_subject)
    = rearrange([qw/EMAIL_REPORT LOG_REPORT COMPONENTS EMAIL_TO_OK EMAIL_TO_WARN EMAIL_FROM EMAIL_SUBJECT/],@p);

  $email_report ||= 'none';
  $log_report   ||= 'all';

  my $date = $self->fetch_date;
  my $msg = <<END;
$email_subject
DATE: $date

END

  my $failed_flag;   # Track whether any of the tests failed
  foreach my $component (@$components) {
    $msg .= $component->initial_status_string. "\n";
    $msg .= $component->final_status_string . "\n" if ($component->final_status_string);
    $msg .= "\n";
    $failed_flag++ if $component->final_status_string;
  }

  unless ($email_report eq 'none') {
    my @to;
    push (@to,$email_to_ok) if $email_to_ok;
    push (@to,$email_to_warn) if $email_to_warn && $email_to_ok && ($email_to_warn ne $email_to_ok);

    unless ($email_report eq 'failures' && !$failed_flag) {
      #      Bio::GMOD::Util::Email->send_email(-to      => \@to,
      #					 -from    => $email_from,
      #				 -subject => $email_subject,
      #				 -content => $msg
      #				);
    }
  }
  print $msg;
}


# Generic accessors
sub status         { return shift->{status}; }
sub tested_at      { return shift->{tested_at}; }
sub testing        { return shift->{testing}; }

sub is_up          { return shift->{is_up};   }
sub is_down        { return shift->{is_down}  }

sub initial_status_string { return shift->{initial_status_string}; }
sub final_status_string   { return shift->{final_status_string}; }


# Create a formatted string - useful for emails and such
sub build_status_string {
  my ($self,@p) = @_;
  my ($timing,$msg) = rearrange([qw/TIMING MSG/],@p);
  my $status = $self->{$timing}->{status};

  my $MAX_LENGTH = 60;

  my $date = $self->fetch_date;
  # Pad the string with '.' up to MAX_LENGTH in length;
  my $string = sprintf("%-*s %*s [%s]",
		       (length $msg) + 1,$msg,
		       $MAX_LENGTH - ((length $msg) + 2),
		       ("." x ($MAX_LENGTH - ((length $msg) + 2))),
		       $status);
  my $full_string = "[$date] $string";
  $self->{$timing . "_status_string"} = $full_string;
  return $full_string;
}


# Status flags are used for testing various services like acedb,
# mysqld, httpd or whatever
sub set_status {
  my ($self,@p) = @_;
  my ($timing,$msg,$status) = rearrange([qw/TIMING MSG STATUS/],@p);
  # Timing is one of initial or final
  # Status is true or false if the service is available

  $self->{$timing}->{status} = $status;
  $self->{$timing}->{msg}    = $msg;

  # Set up some redundant flags, provided as a convenience
  if ($status eq 'up' || $status eq 'succeeded') {
    $self->{is_up}++;
    $self->{is_down} = undef;
  }

  my $string = $self->build_status_string(-timing=>$timing,-msg=>$msg);

  # Return a boolean for status for easy testing
  return ($string,$self->is_up ? 1 : 0);
}


__END__

1;