source: gsdl/trunk/perllib/classify/Collage.pm@ 17209

##########################################################################
#
# Collage.pm --
# A component of the Greenstone digital library software
# from the New Zealand Digital Library Project at the 
# University of Waikato, New Zealand.
#
# Copyright (C) 1999 New Zealand Digital Library Project
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
###########################################################################

package Collage;

use BaseClassifier;
use sorttools;

use strict;
no strict 'refs'; # allow filehandles to be variables and viceversa

sub BEGIN {
    @Collage::ISA = ('BaseClassifier');
}

my $arguments = 
    [ { 'name' => "buttonname",
    'desc' => "{Collage.buttonname}",
    'type' => "string",
    'deft' => "Collage",
    'reqd' => "no" }, 
      { 'name' => "geometry",
    'desc' => "{Collage.geometry}",
    'type' => "string",
    'deft' => "600x300",
    'reqd' => "no" },
      { 'name' => "verbosity",
    'desc' => "{BasClas.verbosity}",
    'type' => "string",
    'deft' => "5",
    'reqd' => "no" },
      { 'name' => "maxDepth",
    'desc' => "{Collage.maxDepth}",
    'type' => "string",
    'deft' => "500"},
#      { 'name' => "maxDownloads",
#   'desc' => "{Collage.maxDownloads}",
#   'type' => "string",
#   'deft' => "",
#   'reqd' => "no" },
      { 'name' => "maxDisplay",
    'desc' => "{Collage.maxDisplay}",
    'type' => "string",
    'deft' => "25",
    'reqd' => "no" },
      { 'name' => "imageType",
    'desc' => "{Collage.imageType}",
    'type' => "string",
    'deft' => ".jpg%%.png",
    'reqd' => "no" },
      { 'name' => "bgcolor",
    'desc' => "{Collage.bgcolor}",
    'type' => "string",
    'deft' => "#96c29a",
    'reqd' => "no" },
      { 'name' => "refreshDelay",
    'desc' => "{Collage.refreshDelay}",
    'type' => "string",
    'deft' => "1500",
    'reqd' => "no" },
      { 'name' => "isJava2",
    'desc' => "{Collage.isJava2}",
    'type' => "string",
    'deft' => "auto",
    'reqd' => "no" },
      { 'name' => "imageMustNotHave",
    'desc' => "{Collage.imageMustNotHave}",
    'type' => "string",
    'deft' => "hl=%%x=%%gt=%%gc=%%.pr",
    'reqd' => "no" },
      { 'name' => "caption",
    'desc' => "{Collage.caption}",
    'type' => "string",
    'deft' => " ",
    'reqd' => "no" }
      ];




my $options = { 'name'     => "Collage",
        'desc'     => "{Collage.desc}",
        'abstract' => "no",
        'inherits' => "Yes",
        'args'     => $arguments };


sub new {
    my ($class) = shift (@_);
    my ($classifierslist,$inputargs,$hashArgOptLists) = @_;
    push(@$classifierslist, $class);

    push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
    push(@{$hashArgOptLists->{"OptList"}},$options);

    my $self = new BaseClassifier($classifierslist, $inputargs, $hashArgOptLists);
    
    if ($self->{'info_only'}) {
    # don't worry about any options etc
    return bless $self, $class;
    }

    # Manually set $self parameters.
    $self->{'list'} = {};
    $self->{'buttonname'} = 'Collage' unless ($self->{'buttonname'});

    return bless $self, $class;
}

sub init {
    my $self = shift (@_);

    $self->{'list'} = [];
}

sub classify {
   
    my $self = shift (@_);
    my ($doc_obj) = @_;

    my $has_image_type = 0;

    my @image_type_split = split(/%/,$self->{'imageType'});
    my @image_type_ext = map { "($_)" } @image_type_split;
    my $image_type_re = join("|",@image_type_ext);
    $image_type_re =~ s/\./\\\./g;

    my $assoc_files = $doc_obj->{'associated_files'};

    foreach my $af ( @$assoc_files ) {
    my ($real_filename, $assoc_filename, $mime_type, $section) = @$af;
    if ($assoc_filename =~ m/$image_type_re/) {
        $has_image_type = 1;
        last;
    }
    }

    if ($has_image_type) {
    my $doc_OID = $doc_obj->get_OID();
    push (@{$self->{'list'}}, $doc_OID);
    }

}

sub get_classify_info {
    my $self = shift (@_);
    
    my $items_per_page = 2; 
    my $max_items_per_page = 20;

    my @list      = @{$self->{'list'}};

    my $outhandle = $self->{'outhandle'};
    my $verbosity = $self->{'verbosity'};

    if ($verbosity>1) {
    print $outhandle ("$self->{'buttonname'}\n");
    }

    my $collage_head = $self->get_entry ($self->{'buttonname'}, "Collage", "Invisible");
    my $collage_curr = $self->get_entry("Collage","VList");
    push (@{$collage_head->{'contains'}},$collage_curr);

    my $global_c=1;
    my $within_page_c=1;

    foreach my $oid (@list) {
    if ($within_page_c>$items_per_page) {
        my $title = "Items $global_c+";
        my $nested_node = $self->get_entry($title,"VList");
        push (@{$collage_curr->{'contains'}}, $nested_node);
        $collage_curr = $nested_node;

        $within_page_c=1;
        
        $items_per_page++ if ($items_per_page < $max_items_per_page);
    }

    push (@{$collage_curr->{'contains'}}, {'OID'=>$oid});
    $global_c++;
    $within_page_c++;
    }
   
    return $collage_head;
}


sub get_entry {
    my $self = shift (@_);
    my ($title, $childtype, $thistype) = @_;

    # organise into classification structure
    my %classifyinfo = ('childtype'=>$childtype,
            'Title'=>$title,
            'contains'=>[]);

    $classifyinfo{'thistype'} = $thistype if (defined $thistype);

    if ($childtype eq "Collage") {
    my $geometry = $self->{'geometry'};
    my ($x_dim,$y_dim) = ($geometry =~ m/^(.*)x(.*)$/);
    my $verbosity = $self->{'verbosity'};
    my $maxDepth = $self->{'maxDepth'};
#   my $maxDownloads = $self->{'maxDownloads'};
    my $maxDisplay = $self->{'maxDisplay'};
    my $imageType = $self->{'imageType'};
    my $bgcolor = $self->{'bgcolor'};
    my $refreshDelay = $self->{'refreshDelay'};
    my $isJava2 = $self->{'isJava2'};
    my $imageMustNotHave = $self->{'imageMustNotHave'};
    my $caption = $self->{'caption'};
    
    #if (!defined($maxDownloads)) {
    #    $maxDownloads="";
    #}

    my $parameters;

    $parameters = "xdim=".$x_dim;
    $parameters .= ";ydim=".$y_dim;
    $parameters .= ";geometry=".$self->{'geometry'};
    $parameters .= ";verbosity=".$self->{'verbosity'};
    $parameters .= ";maxDepth=".$self->{'maxDepth'};
#   $parameters .= ";maxDownloads=".$maxDownloads;
    $parameters .= ";maxDisplay=".$self->{'maxDisplay'};
    $parameters .= ";imageType=".$self->{'imageType'};
    $parameters .= ";bgcolor=".$self->{'bgcolor'};
    $parameters .= ";refreshDelay=".$self->{'refreshDelay'};
    $parameters .= ";isJava2=".$self->{'isJava2'};
    $parameters .= ";caption=".$self->{'caption'};

#   $parameters .= ";imageMustNotHave=".$self->{'imageMustNotHave'};

    
    $classifyinfo{'parameters'} = $parameters;
    }

    return \%classifyinfo;
}

1;