#!/usr/bin/perl
#
#
# This file is part of Koha.
#
# Koha 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 of the License, or (at your option) any later
# version.
#
# Koha 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
# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA  02111-1307 USA
#
#
#

#use strict;
#use warnings; FIXME - Bug 2505

use File::Temp;
use File::Copy;
use CGI;
use GD;
use C4::Context;
use C4::Auth;
use C4::Output;
use C4::Members;
use C4::Debug;

my $input = new CGI;

my ($template, $loggedinuser, $cookie)
	= get_template_and_user({template_name => "tools/picture-upload.tmpl",
					query => $input,
					type => "intranet",
					authnotrequired => 0,
					flagsrequired => { tools => 'batch_upload_patron_images'},
					debug => 0,
					});

my $filetype            = $input->param('filetype');
my $cardnumber          = $input->param('cardnumber');
my $uploadfilename      = $input->param('uploadfile');
my $uploadfile          = $input->upload('uploadfile');
my $borrowernumber      = $input->param('borrowernumber');
my $op                  = $input->param('op');

#FIXME: This code is really in the rough. The variables need to be re-scoped as the two subs depend on global vars to operate.
#       Other parts of this code could be optimized as well, I think. Perhaps the file upload could be done with YUI's upload
#       coded. -fbcit

$debug and warn "Params are: filetype=$filetype, cardnumber=$cardnumber, borrowernumber=$borrowernumber, uploadfile=$uploadfilename";

=head1 NAME

picture-upload.pl - Script for handling uploading of both single and bulk patronimages and importing them into the database.

=head1 SYNOPSIS

picture-upload.pl

=head1 DESCRIPTION

This script is called and presents the user with an interface allowing him/her to upload a single patron image or bulk patron images via a zip file.
Files greater than 100K will be refused. Images should be 140x200 pixels. If they are larger they will be auto-resized to comply.

=cut

$debug and warn "Operation requested: $op";

my ( $total, $handled, @counts, $tempfile, $tfh );

if ( ($op eq 'Upload') && $uploadfile ) {       # Case is important in these operational values as the template must use case to be visually pleasing!
    my $dirname = File::Temp::tempdir( CLEANUP => 1);
    $debug and warn "dirname = $dirname";
    my $filesuffix;
    if ( $uploadfilename =~ m/(\..+)$/i ) {
        $filesuffix = $1;
    }
    ( $tfh, $tempfile ) = File::Temp::tempfile( SUFFIX => $filesuffix, UNLINK => 1 );
    $debug and warn "tempfile = $tempfile";
    my ( @directories, $errors );

    $errors{'NOTZIP'} = 1 if ( $uploadfilename !~ /\.zip$/i && $filetype =~ m/zip/i );
    $errors{'NOWRITETEMP'} = 1 unless ( -w $dirname );
    $errors{'EMPTYUPLOAD'} = 1 unless ( length( $uploadfile ) > 0 );

    if ( %errors ) {
	$template->param( ERRORS => [ \%errors ] );
    } else {
	while ( <$uploadfile> ) {
	    print $tfh $_;
        }
        close $tfh;
        if ( $filetype eq 'zip' ) {
            unless (system("unzip", $tempfile,  '-d', $dirname) == 0) {
                $errors{'UZIPFAIL'} = $uploadfilename;
	        $template->param( ERRORS => [ \%errors ] );
                output_html_with_http_headers $input, $cookie, $template->output;   # This error is fatal to the import, so bail out here
                exit;
            }
            push @directories, "$dirname";
            foreach $recursive_dir ( @directories ) {
                opendir $dir, $recursive_dir;
                while ( my $entry = readdir $dir ) {
	        push @directories, "$recursive_dir/$entry" if ( -d "$recursive_dir/$entry" and $entry !~ /^\./ );
                $debug and warn "$recursive_dir/$entry";
                }
                closedir $dir;
            }
            my $results;
            foreach my $dir ( @directories ) {
                $results = handle_dir( $dir, $filesuffix, $template );
                $handled++ if $results == 1;
            }
            $total = scalar @directories;
        } else {       #if ($filetype eq 'zip' )
            $results = handle_dir( $dirname, $filesuffix, $template, $cardnumber, $tempfile );
            $handled = 1;
            $total = 1;
        }

        if ( %$results || %errors ) {
            $template->param( ERRORS => [ \%$results ] );
        } else {
			my $filecount;
			map {$filecount += $_->{count}} @counts;
            $debug and warn "Total directories processed: $total";
            $debug and warn "Total files processed: $filecount";
            $template->param(
		 	TOTAL => $total,
		 	HANDLED => $handled,
		 	COUNTS => \@counts,
			TCOUNTS => ($filecount > 0 ? $filecount : undef),
            );
			$template->param( borrowernumber => $borrowernumber ) if $borrowernumber;
        }
    }
} elsif ( ($op eq 'Upload') && !$uploadfile ) {
    warn "Problem uploading file or no file uploaded.";
    $template->param(cardnumber => $cardnumber);
    $template->param(filetype => $filetype);
} elsif ( $op eq 'Delete' ) {
    my $dberror = RmPatronImage($borrowernumber);
	$debug and warn "Patron image deleted for $cardnumber";
    warn "Database returned $dberror" if $dberror;
}
if ( $borrowernumber && !$errors && !$template->param('ERRORS') ) {
    print $input->redirect ("/cgi-bin/koha/members/moremember.pl?borrowernumber=$borrowernumber");
} else {
    output_html_with_http_headers $input, $cookie, $template->output;
}

sub handle_dir {
    my ( $dir, $suffix, $template, $cardnumber, $source ) = @_;
    $debug and warn "Entering sub handle_dir; passed \$dir=$dir, \$suffix=$suffix";
    if ($suffix =~ m/zip/i) {     # If we were sent a zip file, process any included data/idlink.txt files
        my ( $file, $filename );
        undef $cardnumber;
        $debug and warn "Passed a zip file.";
        opendir my $dirhandle, $dir;
        while ( my $filename = readdir $dirhandle ) {
            $file = "$dir/$filename" if ($filename =~ m/datalink\.txt/i || $filename =~ m/idlink\.txt/i);
        }
        unless (open (FILE, $file)) {
		warn "Opening $dir/$file failed!";
                $errors{'OPNLINK'} = $file;
		return $errors; # This error is fatal to the import of this directory contents, so bail and return the error to the caller
        };

        while (my $line = <FILE>) {
            $debug and warn "Reading contents of $file";
	    chomp $line;
            $debug and warn "Examining line: $line";
	    my $delim = ($line =~ /\t/) ? "\t" : ($line =~ /,/) ? "," : "";
            $debug and warn "Delimeter is \'$delim\'";
            unless ( $delim eq "," || $delim eq "\t" ) {
                warn "Unrecognized or missing field delimeter. Please verify that you are using either a ',' or a 'tab'";
                $errors{'DELERR'} = 1;      # This error is fatal to the import of this directory contents, so bail and return the error to the caller
                return $errors;
            }
	    ($cardnumber, $filename) = split $delim, $line;
	    $cardnumber =~ s/[\"\r\n]//g;  # remove offensive characters
	    $filename   =~ s/[\"\r\n\s]//g;
            $debug and warn "Cardnumber: $cardnumber Filename: $filename";
            $source = "$dir/$filename";
            %counts = handle_file($cardnumber, $source, $template, %counts);
        }
        close FILE;
        closedir ($dirhandle);
    } else {
        %counts = handle_file($cardnumber, $source, $template, %counts);
    }
push @counts, \%counts;
return 1;
}

sub handle_file {
    my ($cardnumber, $source, $template, %count) = @_;
    $debug and warn "Entering sub handle_file; passed \$cardnumber=$cardnumber, \$source=$source";
    $count{filenames} = () if !$count{filenames};
    $count{source} = $source if !$count{source};
    if ($cardnumber && $source) {     # Now process any imagefiles
        my %filerrors;
        my $filename;
        if ($filetype eq 'image') {
            $filename = $uploadfilename;
        } else {
            $filename = $1 if ($source =~ /\/([^\/]+)$/);
        }
        $debug and warn "Source: $source";
        my $size = (stat($source))[7];
            if ($size > 550000) {    # This check is necessary even with image resizing to avoid possible security/performance issues...
                $filerrors{'OVRSIZ'} = 1;
                push my @filerrors, \%filerrors;
                push @{ $count{filenames} }, { filerrors => \@filerrors, source => $filename, cardnumber => $cardnumber };
                $template->param( ERRORS => 1 );
                return %count;    # this one is fatal so bail here...
            }
        my ($srcimage, $image);
        if (open (IMG, "$source")) {
            $srcimage = GD::Image->new(*IMG);
            close (IMG);
			if (defined $srcimage) {
				my $mimetype = 'image/png';	# GD autodetects three basic image formats: PNG, JPEG, XPM; we will convert all to PNG which is lossless...
				# Check the pixel size of the image we are about to import...
				my ($width, $height) = $srcimage->getBounds();
				$debug and warn "$filename is $width pix X $height pix.";
				if ($width > 200 || $height > 300) {    # MAX pixel dims are 200 X 300...
					$debug and warn "$filename exceeds the maximum pixel dimensions of 200 X 300. Resizing...";
					my $percent_reduce;    # Percent we will reduce the image dimensions by...
					if ($width > 200) {
						$percent_reduce = sprintf("%.5f",(140/$width));    # If the width is oversize, scale based on width overage...
					} else {
						$percent_reduce = sprintf("%.5f",(200/$height));    # otherwise scale based on height overage.
					}
					my $width_reduce = sprintf("%.0f", ($width * $percent_reduce));
					my $height_reduce = sprintf("%.0f", ($height * $percent_reduce));
					$debug and warn "Reducing $filename by " . ($percent_reduce * 100) . "\% or to $width_reduce pix X $height_reduce pix";
					$image = GD::Image->new($width_reduce, $height_reduce, 1); #'1' creates true color image...
					$image->copyResampled($srcimage,0,0,0,0,$width_reduce,$height_reduce,$width,$height);
					$imgfile = $image->png();
					$debug and warn "$filename is " . length($imgfile) . " bytes after resizing.";
					undef $image;
					undef $srcimage;    # This object can get big...
				} else {
					$image = $srcimage;
					$imgfile = $image->png();
					$debug and warn "$filename is " . length($imgfile) . " bytes.";
					undef $image;
					undef $srcimage;    # This object can get big...
				}
				$debug and warn "Image is of mimetype $mimetype";
                my $dberror;
                if ($mimetype) {
                    $dberror = PutPatronImage( $cardnumber, $mimetype, $imgfile );
                }
                if ( !$dberror && $mimetype ) { # Errors from here on are fatal only to the import of a particular image, so don't bail, just note the error and keep going
					$count{count}++;
					push @{ $count{filenames} }, { source => $filename, cardnumber => $cardnumber };
				} elsif ( $dberror ) {
						warn "Database returned error: $dberror";
						($dberror =~ /patronimage_fk1/) ? $filerrors{'IMGEXISTS'} = 1 : $filerrors{'DBERR'} = 1;
						push my @filerrors, \%filerrors;
						push @{ $count{filenames} }, { filerrors => \@filerrors, source => $filename, cardnumber => $cardnumber };
						$template->param( ERRORS => 1 );
				} elsif ( !$mimetype ) {
					warn "Unable to determine mime type of $filename. Please verify mimetype.";
					$filerrors{'MIMERR'} = 1;
					push my @filerrors, \%filerrors;
					push @{ $count{filenames} }, { filerrors => \@filerrors, source => $filename, cardnumber => $cardnumber };
					$template->param( ERRORS => 1 );
				}
			} else {
				warn "Contents of $filename corrupted!";
			#	$count{count}--;
				$filerrors{'CORERR'} = 1;
				push my @filerrors, \%filerrors;
				push @{ $count{filenames} }, { filerrors => \@filerrors, source => $filename, cardnumber => $cardnumber };
				$template->param( ERRORS => 1 );
			}
		} else {
			warn "Opening $dir/$filename failed!";
			$filerrors{'OPNERR'} = 1;
			push my @filerrors, \%filerrors;
			push @{ $count{filenames} }, { filerrors => \@filerrors, source => $filename, cardnumber => $cardnumber };
			$template->param( ERRORS => 1 );
		}
    } else {    # The need for this seems a bit unlikely, however, to maximize error trapping it is included
        warn "Missing " . ($cardnumber ? "filename" : ($filename ? "cardnumber" : "cardnumber and filename"));
        $filerrors{'CRDFIL'} = ($cardnumber ? "filename" : ($filename ? "cardnumber" : "cardnumber and filename"));
        push my @filerrors, \%filerrors;
		push @{ $count{filenames} }, { filerrors => \@filerrors, source => $filename, cardnumber => $cardnumber };
        $template->param( ERRORS => 1 );
    }
    return (%count);
}

=head1 AUTHORS

Original contributor(s) undocumented

Database storage, single patronimage upload option, and extensive error trapping contributed by Chris Nighswonger cnighswonger <at> foundations <dot> edu
Image scaling/resizing contributed by the same.

=cut