C4/HTML5Media.pm

   1 package C4::HTML5Media;
   2
   3 # Copyright 2012 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
  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 $marcflavour          = C4::Context->preference("marcflavour");
  52     foreach my $HTML5Media_field (@HTML5Media_fields) {
  53         my %HTML5Media;
  54         # protocol
  55         if ( $HTML5Media_field->indicator(1) eq '1' ) {
  56             $HTML5Media{protocol} = 'ftp';
  57         }
  58         elsif ( $HTML5Media_field->indicator(1) eq '4' ) {
  59             $HTML5Media{protocol} = 'http';
  60         }
  61         elsif ( $HTML5Media_field->indicator(1) eq '7' ) {
  62             if ($marcflavour eq 'MARC21' || $marcflavour eq 'NORMARC') {
  63                 $HTML5Media{protocol} = $HTML5Media_field->subfield('2');
  64             }
  65             elsif ($marcflavour eq 'UNIMARC') {
  66                 $HTML5Media{protocol} = $HTML5Media_field->subfield('y');
  67             }
  68         }
  69         else {
  70             $HTML5Media{protocol} = 'http';
  71         }
  72         # user
  73         if ( $HTML5Media_field->subfield('l') ) {
  74             $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.
  75         }
  76         elsif ( $HTML5Media_field->subfield('h') ) {
  77             $HTML5Media{username} = $HTML5Media_field->subfield('h');
  78         }
  79         # user/pass
  80         if ( $HTML5Media{username} && $HTML5Media_field->subfield('k') ) {
  81             $HTML5Media{loginblock} = $HTML5Media{username} . ':' . $HTML5Media_field->subfield('k') . '@';
  82         }
  83         elsif ( $HTML5Media{username} ) {
  84             $HTML5Media{loginblock} = $HTML5Media{username} . '@';
  85         }
  86         else {
  87             $HTML5Media{loginblock} = '';
  88         }
  89         # port
  90         if ( $HTML5Media_field->subfield('p') ) {
  91             $HTML5Media{portblock} = ':' . $HTML5Media_field->subfield('k');
  92         }
  93         else {
  94             $HTML5Media{portblock} = '';
  95         }
  96         # src
  97         if ( $HTML5Media_field->subfield('u') ) {
  98             $HTML5Media{srcblock} = $HTML5Media_field->subfield('u');
  99         }
 100         elsif ( $HTML5Media_field->subfield('a') && $HTML5Media_field->subfield('d') && $HTML5Media_field->subfield('f') ) {
 101             $HTML5Media{host}        = $HTML5Media_field->subfield('a');
 102             $HTML5Media{host}        =~ s/(^\/|\/$)//g;
 103             $HTML5Media{path}        = $HTML5Media_field->subfield('d');
 104             $HTML5Media{path}        =~ s/(^\/|\/$)//g;
 105             $HTML5Media{file}        = $HTML5Media_field->subfield('f');
 106             $HTML5Media{srcblock}    = $HTML5Media{protocol} . '://' . $HTML5Media{loginblock} . $HTML5Media{host} . $HTML5Media{portblock} . '/' . $HTML5Media{path} . '/' . $HTML5Media{file};
 107         }
 108         else {
 109             next; # no file to play
 110         }
 111         # extension
 112         $HTML5Media{extension} = ($HTML5Media{srcblock} =~ m/([^.]+)$/)[0];
 113         if ( !grep /\Q$HTML5Media{extension}\E/, @HTML5MediaExtensions ) {
 114             next; # not a specified media file
 115         }
 116         # mime
 117         if ( $HTML5Media_field->subfield('c') ) {
 118             $HTML5Media{codecs} = $HTML5Media_field->subfield('c');
 119         }
 120         ### from subfield q…
 121         if ( $HTML5Media_field->subfield('q') ) {
 122             $HTML5Media{mime} = $HTML5Media_field->subfield('q');
 123         }
 124         ### …or from file extension and codecs…
 125         elsif ( $HTML5Media{codecs} ) {
 126             if ( $HTML5Media{codecs} =~ /theora.*vorbis/ ) {
 127                 $HTML5Media{mime} = 'video/ogg';
 128             }
 129             elsif ( $HTML5Media{codecs} =~ /vp8.*vorbis/ ) {
 130                 $HTML5Media{mime} = 'video/webm';
 131             }
 132             elsif ( ($HTML5Media{codecs} =~ /^vorbis$/) && ($HTML5Media{extension} eq 'ogg') ) {
 133                 $HTML5Media{mime} = 'audio/ogg';
 134             }
 135             elsif ( ($HTML5Media{codecs} =~ /^vorbis$/) && ($HTML5Media{extension} eq 'webm') ) {
 136                 $HTML5Media{mime} = 'audio/webm';
 137             }
 138         }
 139         ### …or just from file extension
 140         else {
 141             if ( $HTML5Media{extension} eq 'ogv' ) {
 142                 $HTML5Media{mime} = 'video/ogg';
 143                 $HTML5Media{codecs} = 'theora,vorbis';
 144             }
 145             if ( $HTML5Media{extension} eq 'oga' ) {
 146                 $HTML5Media{mime} = 'audio/ogg';
 147               $HTML5Media{codecs} = 'vorbis';
 148             }
 149             elsif ( $HTML5Media{extension} eq 'spx' ) {
 150                 $HTML5Media{mime} = 'audio/ogg';
 151                 $HTML5Media{codecs} = 'speex';
 152             }
 153             elsif ( $HTML5Media{extension} eq 'opus' ) {
 154                 $HTML5Media{mime} = 'audio/ogg';
 155                 $HTML5Media{codecs} = 'opus';
 156             }
 157             elsif ( $HTML5Media{extension} eq 'vtt' ) {
 158                 $HTML5Media{mime} = 'text/vtt';
 159             }
 160         }
 161         # codecs
 162         if ( $HTML5Media{codecs} ) {
 163             $HTML5Media{codecblock} = '; codecs="' . $HTML5Media{codecs} . '"';
 164         }
 165         else {
 166             $HTML5Media{codecblock} = '';
 167         }
 168         # type
 169         if ( $HTML5Media{mime} ) {
 170             $HTML5Media{typeblock} = ' type=\'' . $HTML5Media{mime} . $HTML5Media{codecblock} . '\'';
 171         }
 172         else {
 173           $HTML5Media{typeblock} = '';
 174         }
 175         # element
 176         if ( $HTML5Media{mime} =~ /audio/ ) {
 177             $HTML5Media{type} = 'audio';
 178         }
 179         elsif ( $HTML5Media{mime} =~ /video/ ) {
 180             $HTML5Media{type} = 'video';
 181         }
 182         elsif ( $HTML5Media{mime} =~ /text/ ) {
 183             $HTML5Media{type} = 'track';
 184         }
 185         # push
 186         if ( $HTML5Media{srcblock} && $HTML5Media{type} ) {
 187             push (@HTML5Media_sets, \%HTML5Media);
 188         }
 189     }
 190     # parent element
 191     for my $media ( @HTML5Media_sets ) {
 192         if ( ($media->{mime}) && ($media->{mime} =~ /audio/) ) {
 193             if ( $HTML5MediaParent ne 'video' ) {
 194                 $HTML5MediaParent = 'audio';
 195                 $HTML5MediaWidth = '';
 196             }
 197         }
 198         elsif ( ($media->{mime}) && ($media->{mime} =~ /video/) ) {
 199             $HTML5MediaParent = 'video';
 200             $HTML5MediaWidth = ' width="480"';
 201         }
 202     }
 203     # child element
 204     for my $media ( @HTML5Media_sets ) {
 205         if ( ($media->{type}) && ( ($media->{type} eq 'video') || ($media->{type} eq 'audio') ) ) {
 206             if ( $media->{type} eq $HTML5MediaParent ) {
 207                 $media->{child} = 'source';
 208             }
 209         }
 210         else {
 211             $media->{child} = $media->{type};
 212         }
 213     }
 214
 215     return (
 216         HTML5MediaEnabled  => ( (scalar(@HTML5Media_sets) > 0) && ($HTML5MediaParent) ),
 217         HTML5MediaSets     => \@HTML5Media_sets,
 218         HTML5MediaParent   => $HTML5MediaParent,
 219         HTML5MediaWidth    => $HTML5MediaWidth,
 220     );
 221 }
 222
 223 1;