#!/usr/local/bin/perl

###############################################################################
# Program     : GetImage
# Author      : Eric Deutsch <edeutsch@systemsbiology.org>
# $Id$
#
# Description : This CGI program sends the requested image
#               based on various parameters
#
# SBEAMS is Copyright (C) 2000-2005 Institute for Systems Biology
# This program is governed by the terms of the GNU General Public License (GPL)
# version 2 as published by the Free Software Foundation.  It is provided
# WITHOUT ANY WARRANTY.  See the full description of GPL terms in the
# LICENSE file distributed with this software.
#
###############################################################################


###############################################################################
# Set up all needed modules and objects
###############################################################################
use strict;
use Getopt::Long;
use FindBin;

use lib "$FindBin::Bin/../../lib/perl";
use vars qw ($sbeams $sbeamsMOD $q $current_contact_id $current_username
             $PROG_NAME $USAGE %OPTIONS $QUIET $VERBOSE $DEBUG $DATABASE
             $TABLE_NAME $PROGRAM_FILE_NAME $CATEGORY $DB_TABLE_NAME
             @MENU_OPTIONS);

use SBEAMS::Connection qw($q);
use SBEAMS::Connection::Settings;
use SBEAMS::Connection::Tables;

use SBEAMS::Proteomics;
use SBEAMS::Proteomics::Settings;
use SBEAMS::Proteomics::Tables;

$sbeams = new SBEAMS::Connection;
$sbeamsMOD = new SBEAMS::Proteomics;
$sbeamsMOD->setSBEAMS($sbeams);
$sbeams->setSBEAMS_SUBDIR($SBEAMS_SUBDIR);


#use CGI;
#$q = new CGI;


###############################################################################
# Set program name and usage banner for command like use
###############################################################################
$PROG_NAME = $FindBin::Script;
$USAGE = <<EOU;
Usage: $PROG_NAME [OPTIONS] key=value kay=value ...
Options:
  --verbose n         Set verbosity level.  default is 0
  --quiet             Set flag to print nothing at all except errors
  --debug n           Set debug flag

 e.g.:  $PROG_NAME [OPTIONS] [keyword=value],...

EOU

#### Process options
unless (GetOptions(\%OPTIONS,"verbose:s","quiet","debug:s")) {
  print "$USAGE";
  exit;
}

$VERBOSE = $OPTIONS{"verbose"} || 0;
$QUIET = $OPTIONS{"quiet"} || 0;
$DEBUG = $OPTIONS{"debug"} || 0;
if ($DEBUG) {
  print "Options settings:\n";
  print "  VERBOSE = $VERBOSE\n";
  print "  QUIET = $QUIET\n";
  print "  DEBUG = $DEBUG\n";
}


###############################################################################
# Set Global Variables and execute main()
###############################################################################
main();
exit(0);


###############################################################################
# Main Program:
#
# Call $sbeams->Authenticate() and exit if it fails or continue if it works.
###############################################################################
sub main {

  #### Do the SBEAMS authentication and exit if a username is not returned
  exit unless ($current_username = $sbeams->Authenticate(
    permitted_work_groups_ref=>['Proteomics_user','Proteomics_admin',
      'Proteomics_readonly'],
    #connect_read_only=>1,
    #allow_anonymous_access=>1,
  ));


  #### Read in the default input parameters
  my %parameters;
  my $n_params_found = $sbeams->parse_input_parameters(
    q=>$q,parameters_ref=>\%parameters);
  #$sbeams->printDebuggingInfo($q);


  #### Process generic "state" parameters before we start
  $sbeams->processStandardParameters(parameters_ref=>\%parameters);


  #### Decide what action to take based on information so far
  if ($parameters{action} eq "???") {
    # Some action
  } else {
    #$sbeamsMOD->display_page_header();
    handle_request(ref_parameters=>\%parameters);
    #$sbeamsMOD->display_page_footer();
  }


} # end main


###############################################################################
# Handle Request
###############################################################################
sub handle_request {
  my %args = @_;


  #### Process the arguments list
  my $ref_parameters = $args{'ref_parameters'}
    || die "ref_parameters not passed";
  my %parameters = %{$ref_parameters};


  #### Define some generic varibles
  my ($i,$element,$key,$value,$line,$result,$sql);


  #### verify that needed parameters were passed
  unless ($parameters{fraction_id} && $parameters{search_batch_id}) {
    print "ERROR: not all needed parameters were passed.  This should never ".
      "happen!  Please report this error.<BR>\n";
    return;
  }


  #### Find the corresponding information for this fraction_id
  $sql = qq~
	SELECT fraction_tag,data_location
	  FROM $TBPR_FRACTION F
	 INNER JOIN $TBPR_SEARCH_BATCH SB
               ON ( F.experiment_id = SB.experiment_id )
	 WHERE fraction_id = '$parameters{fraction_id}'
           AND SB.search_batch_id = '$parameters{search_batch_id}'
  ~;

  my %fractions = $sbeams->selectTwoColumnHash($sql);
  unless (%fractions) {
    print "ERROR: Unable to find any fractions for fraction_id".
      " = '$parameters{fraction_id}'.  This really should never ".
      "happen!  Please report the problem.<BR>\n";
    return;
  }


  #### Send the data
  print "Content-type: image/png\n\n";
  while ( ($key,$value) = each %fractions ) {
    my $filename = "$value/../$key.png";
    $filename = "$value/$key.ms.png" if ($parameters{image_type} eq 'MSrun');
    $filename = "$value/$key.msvflip.png" if ($parameters{image_type} eq 'MSrun_vflip');

    unless ($filename =~ /^\//) {
      $filename = $RAW_DATA_DIR{Proteomics}."/$filename";
    }
    my $buffer;
    open(DATA, $filename)
      || die("Couldn't open $filename: ".$!);
    while (read(DATA, $buffer, 1024)) {
        print $buffer;
    }
    last;
  }



} # end handle_request