1 | ###########################################################################
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2 | #
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3 | # HTML.pm --
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4 | # A component of the Greenstone digital library software
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5 | # from the New Zealand Digital Library Project at the
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6 | # University of Waikato, New Zealand.
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7 | #
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8 | # Copyright (C) 1999 New Zealand Digital Library Project
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9 | #
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10 | # This program is free software; you can redistribute it and/or modify
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11 | # it under the terms of the GNU General Public License as published by
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12 | # the Free Software Foundation; either version 2 of the License, or
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13 | # (at your option) any later version.
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14 | #
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15 | # This program is distributed in the hope that it will be useful,
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16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | # GNU General Public License for more details.
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19 | #
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20 | # You should have received a copy of the GNU General Public License
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21 | # along with this program; if not, write to the Free Software
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22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | #
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24 | ###########################################################################
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25 |
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26 | # html classifier plugin - creates an empty classification
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27 | # that's simply a link to a web page
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28 |
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29 | package HTML;
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30 |
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31 | use BaseClassifier;
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32 |
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33 | use strict;
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34 | no strict 'refs'; # allow filehandles to be variables and viceversa
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35 |
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36 | sub BEGIN {
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37 | @HTML::ISA = ('BaseClassifier');
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38 | }
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39 |
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40 | my $arguments =
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41 | [ { 'name' => "url",
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42 | 'desc' => "{HTML.url}",
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43 | 'type' => "string",
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44 | 'reqd' => "yes" } ,
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45 | { 'name' => "buttonname",
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46 | 'desc' => "{BasClas.buttonname}",
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47 | 'type' => "string",
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48 | 'deft' => "Browse",
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49 | 'reqd' => "no" } ];
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50 |
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51 | my $options = { 'name' => "HTML",
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52 | 'desc' => "{HTML.desc}",
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53 | 'abstract' => "no",
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54 | 'inherits' => "yes",
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55 | 'args' => $arguments };
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56 |
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57 |
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58 | sub new {
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59 | my ($class) = shift (@_);
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60 | my ($classifierslist,$inputargs,$hashArgOptLists) = @_;
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61 | push(@$classifierslist, $class);
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62 |
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63 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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64 | push(@{$hashArgOptLists->{"OptList"}},$options);
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65 |
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66 | my $self = new BaseClassifier($classifierslist, $inputargs, $hashArgOptLists);
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67 |
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68 | if ($self->{'info_only'}) {
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69 | # don't worry about any options etc
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70 | return bless $self, $class;
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71 | }
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72 |
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73 | if (!$self->{'url'}) {
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74 | my $outhandle = $self->{'outhandle'};
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75 | print $outhandle "HTML Error: required option -url not supplied\n";
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76 | $self->print_txt_usage("");
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77 | die "HTML Error: required option -url not supplied\n";
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78 | }
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79 | return bless $self, $class;
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80 | }
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81 |
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82 | sub init {
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83 | my $self = shift (@_);
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84 | }
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85 |
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86 | sub classify {
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87 | my $self = shift (@_);
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88 | my ($doc_obj) = @_;
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89 |
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90 | # we don't do anything for individual documents
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91 | }
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92 |
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93 | sub get_classify_info {
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94 | my $self = shift (@_);
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95 |
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96 | my %classifyinfo = ('thistype'=>'Invisible',
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97 | 'childtype'=>'HTML',
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98 | 'Title'=>$self->{'buttonname'},
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99 | 'contains'=>[]);
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100 |
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101 | push (@{$classifyinfo{'contains'}}, {'OID'=>$self->{'url'}});
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102 |
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103 | return \%classifyinfo;
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104 | }
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105 |
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106 |
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107 | 1;
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