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::UploadedFiles;
  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     foreach my $HTML5Media_field (@HTML5Media_fields) {
  54         my $is_youtube            = 0;
  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                     my $url = $HTML5Media_field->subfield('u');
 104                     # Credit for regex goes to https://stackoverflow.com/questions/3452546/how-do-i-get-the-youtube-video-id-from-a-url
 105                     next unless $url =~ m{^.*(youtu\.be\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=)([^#\&\?]*).*};
 106                     my $video_id = $2;
 107                     next unless length($video_id) == 11; # Youtube video ids are 11 chars length
 108                     $HTML5Media{srcblock} = sprintf '%s://www.youtube.com/embed/%s', $HTML5Media{protocol}, $video_id;
 109                     $HTML5Media{is_youtube} = 1;
 110                     $is_youtube = 1;
 111                 }
 112                else {
 113                    next; # do not embed youtube videos
 114                }
 115             }
 116         }
 117         elsif ( $HTML5Media_field->subfield('a') && $HTML5Media_field->subfield('d') && $HTML5Media_field->subfield('f') ) {
 118             $HTML5Media{host}        = $HTML5Media_field->subfield('a');
 119             $HTML5Media{host}        =~ s/(^\/|\/$)//g;
 120             $HTML5Media{path}        = $HTML5Media_field->subfield('d');
 121             $HTML5Media{path}        =~ s/(^\/|\/$)//g; # TODO we could check for youtube here too, but nobody uses these fields anyway…
 122             $HTML5Media{file}        = $HTML5Media_field->subfield('f');
 123             $HTML5Media{srcblock}    = $HTML5Media{protocol} . '://' . $HTML5Media{loginblock} . $HTML5Media{host} . $HTML5Media{portblock} . '/' . $HTML5Media{path} . '/' . $HTML5Media{file};
 124         }
 125         else {
 126             next; # no file to play
 127         }
 128         # extension
 129         # check uploaded files
 130         if ( $HTML5Media{srcblock} =~ /\Qopac-retrieve-file.pl\E/ ) {
 131             my ( undef, $id ) = split /id=/, $HTML5Media{srcblock};
 132             next if !$id;
 133             my %public = ( ( caller )[1] =~ /opac/ ) ? ( public => 1 ): ();
 134             my $upload = Koha::UploadedFiles->search({
 135                 hashvalue => $id, %public,
 136             })->next;
 137             next if !$upload || $upload->filename !~ /\./;
 138             $HTML5Media{extension} = ( $upload->filename =~ m/([^.]+)$/ )[0];
 139         }
 140         # check remote files
 141         else {
 142             $HTML5Media{extension} = ($HTML5Media{srcblock} =~ m/([^.]+)$/)[0];
 143         }
 144         if ( ( !grep /\Q$HTML5Media{extension}\E/, @HTML5MediaExtensions ) && ( $is_youtube != 1) ) {
 145             next; # not a specified media file
 146         }
 147         # youtube
 148         if ($is_youtube == 1) {
 149             $HTML5Media{mime} = 'video/webm';
 150             $HTML5Media{type} = 'video';
 151         }
 152         # mime
 153         if ( $HTML5Media_field->subfield('c') ) {
 154             $HTML5Media{codecs} = $HTML5Media_field->subfield('c');
 155         }
 156         ### from subfield q…
 157         if ( $HTML5Media_field->subfield('q') ) {
 158             $HTML5Media{mime} = $HTML5Media_field->subfield('q');
 159         }
 160         ### …or from file extension and codecs…
 161         elsif ( $HTML5Media{codecs} ) {
 162             if ( $HTML5Media{codecs} =~ /theora.*vorbis/ ) {
 163                 $HTML5Media{mime} = 'video/ogg';
 164             }
 165             elsif ( $HTML5Media{codecs} =~ /vp8.*vorbis/ ) {
 166                 $HTML5Media{mime} = 'video/webm';
 167             }
 168             elsif ( ($HTML5Media{codecs} =~ /^vorbis$/) && ($HTML5Media{extension} eq 'ogg') ) {
 169                 $HTML5Media{mime} = 'audio/ogg';
 170             }
 171             elsif ( ($HTML5Media{codecs} =~ /^vorbis$/) && ($HTML5Media{extension} eq 'webm') ) {
 172                 $HTML5Media{mime} = 'audio/webm';
 173             }
 174         }
 175         ### …or just from file extension
 176         else {
 177             if ( $HTML5Media{extension} eq 'ogv' ) {
 178                 $HTML5Media{mime} = 'video/ogg';
 179                 $HTML5Media{codecs} = 'theora,vorbis';
 180             }
 181             if ( $HTML5Media{extension} eq 'oga' ) {
 182                 $HTML5Media{mime} = 'audio/ogg';
 183                 $HTML5Media{codecs} = 'vorbis';
 184             }
 185             elsif ( $HTML5Media{extension} eq 'spx' ) {
 186                 $HTML5Media{mime} = 'audio/ogg';
 187                 $HTML5Media{codecs} = 'speex';
 188             }
 189             elsif ( $HTML5Media{extension} eq 'opus' ) {
 190                 $HTML5Media{mime} = 'audio/ogg';
 191                 $HTML5Media{codecs} = 'opus';
 192             }
 193             elsif ( $HTML5Media{extension} eq 'vtt' ) {
 194                 $HTML5Media{mime} = 'text/vtt';
 195             }
 196         }
 197         # codecs
 198         if ( $HTML5Media{codecs} ) {
 199             $HTML5Media{codecblock} = '; codecs="' . $HTML5Media{codecs} . '"';
 200         }
 201         else {
 202             $HTML5Media{codecblock} = '';
 203         }
 204         # type
 205         if ( $HTML5Media{mime} ) {
 206             $HTML5Media{typeblock} = ' type=\'' . $HTML5Media{mime} . $HTML5Media{codecblock} . '\'';
 207         }
 208         else {
 209           $HTML5Media{typeblock} = '';
 210         }
 211         # element
 212         if ( $HTML5Media{mime} =~ /audio/ ) {
 213             $HTML5Media{type} = 'audio';
 214         }
 215         elsif ( $HTML5Media{mime} =~ /video/ ) {
 216             $HTML5Media{type} = 'video';
 217         }
 218         elsif ( $HTML5Media{mime} =~ /text/ ) {
 219             $HTML5Media{type} = 'track';
 220         }
 221         # push
 222         if ( $HTML5Media{srcblock} && $HTML5Media{type} ) {
 223             push (@HTML5Media_sets, \%HTML5Media);
 224         }
 225     }
 226     # parent element
 227     for my $media ( @HTML5Media_sets ) {
 228         if ( ($media->{mime}) && ($media->{mime} =~ /audio/) ) {
 229             if ( $HTML5MediaParent ne 'video' ) {
 230                 $HTML5MediaParent = 'audio';
 231                 $HTML5MediaWidth = '';
 232             }
 233         }
 234         elsif ( ($media->{mime}) && ($media->{mime} =~ /video/) ) {
 235             $HTML5MediaParent = 'video';
 236             $HTML5MediaWidth = ' width="480"';
 237         }
 238     }
 239     # child element
 240     for my $media ( @HTML5Media_sets ) {
 241         if ( ($media->{type}) && ( ($media->{type} eq 'video') || ($media->{type} eq 'audio') ) ) {
 242             if ( $media->{type} eq $HTML5MediaParent ) {
 243                 $media->{child} = 'source';
 244             }
 245         }
 246         else {
 247             $media->{child} = $media->{type};
 248         }
 249     }
 250
 251     return (
 252         HTML5MediaEnabled  => ( (scalar(@HTML5Media_sets) > 0) && ($HTML5MediaParent) ),
 253         HTML5MediaSets     => \@HTML5Media_sets,
 254         HTML5MediaParent   => $HTML5MediaParent,
 255         HTML5MediaWidth    => $HTML5MediaWidth,
 256     );
 257 }
 258
 259 1;