C4/HTML5Media.pm

   1 package C4::HTML5Media;
   2
   3 # Copyright 2012/2015 Mirko Tietgen
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  19
  20 use strict;
  21 use warnings;
  22
  23 use C4::Context;
  24 use MARC::Field;
  25 use Koha::Upload;
  26
  27 =head1 HTML5Media
  28
  29 C4::HTML5Media
  30
  31 =head1 Description
  32
  33 This module gets the relevant data from field 856 (MARC21/UNIMARC) to create a HTML5 audio or video element containing the file(s) catalogued in 856.
  34
  35 =cut
  36
  37 =head2 gethtml5media
  38
  39 Get all relevant data from field 856. Takes a $record in the subroutine call, sets appropriate params.
  40
  41 =cut
  42
  43 sub gethtml5media {
  44     my $self = shift;
  45     my $record = shift;
  46     my @HTML5Media_sets = ();
  47     my @HTML5Media_fields = $record->field(856);
  48     my $HTML5MediaParent;
  49     my $HTML5MediaWidth;
  50     my @HTML5MediaExtensions = split( /\|/, C4::Context->preference("HTML5MediaExtensions") );
  51     my $HTML5MediaYouTube    = C4::Context->preference("HTML5MediaYouTube");
  52     my $marcflavour          = C4::Context->preference("marcflavour");
  53     my $isyoutube            = 0;
  54     foreach my $HTML5Media_field (@HTML5Media_fields) {
  55         my %HTML5Media;
  56         # protocol
  57         if ( $HTML5Media_field->indicator(1) eq '1' ) {
  58             $HTML5Media{protocol} = 'ftp';
  59         }
  60         elsif ( $HTML5Media_field->indicator(1) eq '4' ) {
  61             $HTML5Media{protocol} = 'http';
  62         }
  63         elsif ( $HTML5Media_field->indicator(1) eq '7' ) {
  64             if ($marcflavour eq 'MARC21' || $marcflavour eq 'NORMARC') {
  65                 $HTML5Media{protocol} = $HTML5Media_field->subfield('2');
  66             }
  67             elsif ($marcflavour eq 'UNIMARC') {
  68                 $HTML5Media{protocol} = $HTML5Media_field->subfield('y');
  69             }
  70         }
  71         else {
  72             $HTML5Media{protocol} = 'http';
  73         }
  74         # user
  75         if ( $HTML5Media_field->subfield('l') ) {
  76             $HTML5Media{username} = $HTML5Media_field->subfield('l'); # yes, that is arbitrary if h and l are not the same. originally i flipped a coin in that case.
  77         }
  78         elsif ( $HTML5Media_field->subfield('h') ) {
  79             $HTML5Media{username} = $HTML5Media_field->subfield('h');
  80         }
  81         # user/pass
  82         if ( $HTML5Media{username} && $HTML5Media_field->subfield('k') ) {
  83             $HTML5Media{loginblock} = $HTML5Media{username} . ':' . $HTML5Media_field->subfield('k') . '@';
  84         }
  85         elsif ( $HTML5Media{username} ) {
  86             $HTML5Media{loginblock} = $HTML5Media{username} . '@';
  87         }
  88         else {
  89             $HTML5Media{loginblock} = '';
  90         }
  91         # port
  92         if ( $HTML5Media_field->subfield('p') ) {
  93             $HTML5Media{portblock} = ':' . $HTML5Media_field->subfield('k');
  94         }
  95         else {
  96             $HTML5Media{portblock} = '';
  97         }
  98         # src
  99         if ( $HTML5Media_field->subfield('u') ) {
 100             $HTML5Media{srcblock} = $HTML5Media_field->subfield('u');
 101             if (grep /youtu\.?be/, $HTML5Media_field->subfield('u') ) {
 102                 if ($HTML5MediaYouTube == 1) {
 103                     require WWW::YouTube::Download;
 104                     import  WWW::YouTube::Download qw(playback_url);
 105                     my $youtube           = WWW::YouTube::Download->new;
 106                     eval {
 107                         $HTML5Media{srcblock} = $youtube->playback_url(
 108                             $HTML5Media_field->subfield('u'), {
 109                                 'fmt' => '43' #webm is the only format compatible to all modern browsers. maybe check for available qualities
 110                             }
 111                         );
 112                     };
 113                     if ($@) { warn $@; }
 114                     else  { $isyoutube = 1;}
 115                 }
 116                else {
 117                    next; # do not embed youtube videos
 118                }
 119             }
 120         }
 121         elsif ( $HTML5Media_field->subfield('a') && $HTML5Media_field->subfield('d') && $HTML5Media_field->subfield('f') ) {
 122             $HTML5Media{host}        = $HTML5Media_field->subfield('a');
 123             $HTML5Media{host}        =~ s/(^\/|\/$)//g;
 124             $HTML5Media{path}        = $HTML5Media_field->subfield('d');
 125             $HTML5Media{path}        =~ s/(^\/|\/$)//g; # TODO we could check for youtube here too, but nobody uses these fields anyway…
 126             $HTML5Media{file}        = $HTML5Media_field->subfield('f');
 127             $HTML5Media{srcblock}    = $HTML5Media{protocol} . '://' . $HTML5Media{loginblock} . $HTML5Media{host} . $HTML5Media{portblock} . '/' . $HTML5Media{path} . '/' . $HTML5Media{file};
 128         }
 129         else {
 130             next; # no file to play
 131         }
 132         # extension
 133         # check uploaded files
 134         if ( $HTML5Media{srcblock} =~ /\Qopac-retrieve-file.pl\E/ ) {
 135             my ( undef, $id ) = split /id=/, $HTML5Media{srcblock};
 136             next if !$id;
 137             my $public = ( ( caller )[1] =~ /opac/ ) ? { public => 1 }: {};
 138             my $upl = Koha::Upload->new( $public )->get({ hashvalue => $id });
 139             next if !$upl || $upl->{name} !~ /\./;
 140             $HTML5Media{extension} = ( $upl->{name} =~ m/([^.]+)$/ )[0];
 141         }
 142         # check remote files
 143         else {
 144             $HTML5Media{extension} = ($HTML5Media{srcblock} =~ m/([^.]+)$/)[0];
 145         }
 146         if ( ( !grep /\Q$HTML5Media{extension}\E/, @HTML5MediaExtensions ) && ( $isyoutube != 1) ) {
 147             next; # not a specified media file
 148         }
 149         # youtube
 150         if ($isyoutube == 1) {
 151                 $HTML5Media{mime} = 'video/webm';
 152         }
 153         # mime
 154         if ( $HTML5Media_field->subfield('c') ) {
 155             $HTML5Media{codecs} = $HTML5Media_field->subfield('c');
 156         }
 157         ### from subfield q…
 158         if ( $HTML5Media_field->subfield('q') ) {
 159             $HTML5Media{mime} = $HTML5Media_field->subfield('q');
 160         }
 161         ### …or from file extension and codecs…
 162         elsif ( $HTML5Media{codecs} ) {
 163             if ( $HTML5Media{codecs} =~ /theora.*vorbis/ ) {
 164                 $HTML5Media{mime} = 'video/ogg';
 165             }
 166             elsif ( $HTML5Media{codecs} =~ /vp8.*vorbis/ ) {
 167                 $HTML5Media{mime} = 'video/webm';
 168             }
 169             elsif ( ($HTML5Media{codecs} =~ /^vorbis$/) && ($HTML5Media{extension} eq 'ogg') ) {
 170                 $HTML5Media{mime} = 'audio/ogg';
 171             }
 172             elsif ( ($HTML5Media{codecs} =~ /^vorbis$/) && ($HTML5Media{extension} eq 'webm') ) {
 173                 $HTML5Media{mime} = 'audio/webm';
 174             }
 175         }
 176         ### …or just from file extension
 177         else {
 178             if ( $HTML5Media{extension} eq 'ogv' ) {
 179                 $HTML5Media{mime} = 'video/ogg';
 180                 $HTML5Media{codecs} = 'theora,vorbis';
 181             }
 182             if ( $HTML5Media{extension} eq 'oga' ) {
 183                 $HTML5Media{mime} = 'audio/ogg';
 184                 $HTML5Media{codecs} = 'vorbis';
 185             }
 186             elsif ( $HTML5Media{extension} eq 'spx' ) {
 187                 $HTML5Media{mime} = 'audio/ogg';
 188                 $HTML5Media{codecs} = 'speex';
 189             }
 190             elsif ( $HTML5Media{extension} eq 'opus' ) {
 191                 $HTML5Media{mime} = 'audio/ogg';
 192                 $HTML5Media{codecs} = 'opus';
 193             }
 194             elsif ( $HTML5Media{extension} eq 'vtt' ) {
 195                 $HTML5Media{mime} = 'text/vtt';
 196             }
 197         }
 198         # codecs
 199         if ( $HTML5Media{codecs} ) {
 200             $HTML5Media{codecblock} = '; codecs="' . $HTML5Media{codecs} . '"';
 201         }
 202         else {
 203             $HTML5Media{codecblock} = '';
 204         }
 205         # type
 206         if ( $HTML5Media{mime} ) {
 207             $HTML5Media{typeblock} = ' type=\'' . $HTML5Media{mime} . $HTML5Media{codecblock} . '\'';
 208         }
 209         else {
 210           $HTML5Media{typeblock} = '';
 211         }
 212         # element
 213         if ( $HTML5Media{mime} =~ /audio/ ) {
 214             $HTML5Media{type} = 'audio';
 215         }
 216         elsif ( $HTML5Media{mime} =~ /video/ ) {
 217             $HTML5Media{type} = 'video';
 218         }
 219         elsif ( $HTML5Media{mime} =~ /text/ ) {
 220             $HTML5Media{type} = 'track';
 221         }
 222         # push
 223         if ( $HTML5Media{srcblock} && $HTML5Media{type} ) {
 224             push (@HTML5Media_sets, \%HTML5Media);
 225         }
 226     }
 227     # parent element
 228     for my $media ( @HTML5Media_sets ) {
 229         if ( ($media->{mime}) && ($media->{mime} =~ /audio/) ) {
 230             if ( $HTML5MediaParent ne 'video' ) {
 231                 $HTML5MediaParent = 'audio';
 232                 $HTML5MediaWidth = '';
 233             }
 234         }
 235         elsif ( ($media->{mime}) && ($media->{mime} =~ /video/) ) {
 236             $HTML5MediaParent = 'video';
 237             $HTML5MediaWidth = ' width="480"';
 238         }
 239     }
 240     # child element
 241     for my $media ( @HTML5Media_sets ) {
 242         if ( ($media->{type}) && ( ($media->{type} eq 'video') || ($media->{type} eq 'audio') ) ) {
 243             if ( $media->{type} eq $HTML5MediaParent ) {
 244                 $media->{child} = 'source';
 245             }
 246         }
 247         else {
 248             $media->{child} = $media->{type};
 249         }
 250     }
 251
 252     return (
 253         HTML5MediaEnabled  => ( (scalar(@HTML5Media_sets) > 0) && ($HTML5MediaParent) ),
 254         HTML5MediaSets     => \@HTML5Media_sets,
 255         HTML5MediaParent   => $HTML5MediaParent,
 256         HTML5MediaWidth    => $HTML5MediaWidth,
 257     );
 258 }
 259
 260 1;