package C4::HTML5Media; # Copyright 2012/2015 Mirko Tietgen # # This file is part of Koha. # # Koha 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 3 of the License, or # (at your option) any later version. # # Koha 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 Koha; if not, see . use strict; use warnings; use C4::Context; use MARC::Field; use Koha::UploadedFiles; =head1 HTML5Media C4::HTML5Media =head1 Description 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. =cut =head2 gethtml5media Get all relevant data from field 856. Takes a $record in the subroutine call, sets appropriate params. =cut sub gethtml5media { my $self = shift; my $record = shift; my @HTML5Media_sets = (); my @HTML5Media_fields = $record->field(856); my $HTML5MediaParent; my $HTML5MediaWidth; my @HTML5MediaExtensions = split( /\|/, C4::Context->preference("HTML5MediaExtensions") ); my $HTML5MediaYouTube = C4::Context->preference("HTML5MediaYouTube"); my $marcflavour = C4::Context->preference("marcflavour"); foreach my $HTML5Media_field (@HTML5Media_fields) { my $is_youtube = 0; my %HTML5Media; # protocol if ( $HTML5Media_field->indicator(1) eq '1' ) { $HTML5Media{protocol} = 'ftp'; } elsif ( $HTML5Media_field->indicator(1) eq '4' ) { $HTML5Media{protocol} = 'http'; } elsif ( $HTML5Media_field->indicator(1) eq '7' ) { if ($marcflavour eq 'MARC21') { $HTML5Media{protocol} = $HTML5Media_field->subfield('2'); } elsif ($marcflavour eq 'UNIMARC') { $HTML5Media{protocol} = $HTML5Media_field->subfield('y'); } } else { $HTML5Media{protocol} = 'http'; } # user if ( $HTML5Media_field->subfield('l') ) { $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. } elsif ( $HTML5Media_field->subfield('h') ) { $HTML5Media{username} = $HTML5Media_field->subfield('h'); } # user/pass if ( $HTML5Media{username} && $HTML5Media_field->subfield('k') ) { $HTML5Media{loginblock} = $HTML5Media{username} . ':' . $HTML5Media_field->subfield('k') . '@'; } elsif ( $HTML5Media{username} ) { $HTML5Media{loginblock} = $HTML5Media{username} . '@'; } else { $HTML5Media{loginblock} = ''; } # port if ( $HTML5Media_field->subfield('p') ) { $HTML5Media{portblock} = ':' . $HTML5Media_field->subfield('k'); } else { $HTML5Media{portblock} = ''; } # src if ( $HTML5Media_field->subfield('u') ) { $HTML5Media{srcblock} = $HTML5Media_field->subfield('u'); if (grep /youtu\.?be/, $HTML5Media_field->subfield('u') ) { if ($HTML5MediaYouTube == 1) { my $url = $HTML5Media_field->subfield('u'); # Credit for regex goes to https://stackoverflow.com/questions/3452546/how-do-i-get-the-youtube-video-id-from-a-url next unless $url =~ m{^.*(youtu\.be\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=)([^#\&\?]*).*}; my $video_id = $2; next unless length($video_id) == 11; # Youtube video ids are 11 chars length $HTML5Media{srcblock} = sprintf 'https://www.youtube.com/embed/%s', $video_id; $HTML5Media{is_youtube} = 1; $is_youtube = 1; } else { next; # do not embed youtube videos } } } elsif ( $HTML5Media_field->subfield('a') && $HTML5Media_field->subfield('d') && $HTML5Media_field->subfield('f') ) { $HTML5Media{host} = $HTML5Media_field->subfield('a'); $HTML5Media{host} =~ s/(^\/|\/$)//g; $HTML5Media{path} = $HTML5Media_field->subfield('d'); $HTML5Media{path} =~ s/(^\/|\/$)//g; # TODO we could check for youtube here too, but nobody uses these fields anyway… $HTML5Media{file} = $HTML5Media_field->subfield('f'); $HTML5Media{srcblock} = $HTML5Media{protocol} . '://' . $HTML5Media{loginblock} . $HTML5Media{host} . $HTML5Media{portblock} . '/' . $HTML5Media{path} . '/' . $HTML5Media{file}; } else { next; # no file to play } # extension # check uploaded files if ( $HTML5Media{srcblock} =~ /\Qopac-retrieve-file.pl\E/ ) { my ( undef, $id ) = split /id=/, $HTML5Media{srcblock}; next if !$id; my %public = ( ( caller )[1] =~ /opac/ ) ? ( public => 1 ): (); my $upload = Koha::UploadedFiles->search({ hashvalue => $id, %public, })->next; next if !$upload || $upload->filename !~ /\./; $HTML5Media{extension} = ( $upload->filename =~ m/([^.]+)$/ )[0]; } # check remote files else { $HTML5Media{extension} = ($HTML5Media{srcblock} =~ m/([^.]+)$/)[0]; } if ( ( !grep /\Q$HTML5Media{extension}\E/, @HTML5MediaExtensions ) && ( $is_youtube != 1) ) { next; # not a specified media file } # youtube if ($is_youtube == 1) { $HTML5Media{mime} = 'video/webm'; $HTML5Media{type} = 'video'; } # mime if ( $HTML5Media_field->subfield('c') ) { $HTML5Media{codecs} = $HTML5Media_field->subfield('c'); } ### from subfield q… if ( $HTML5Media_field->subfield('q') ) { $HTML5Media{mime} = $HTML5Media_field->subfield('q'); } ### …or from file extension and codecs… elsif ( $HTML5Media{codecs} ) { if ( $HTML5Media{codecs} =~ /theora.*vorbis/ ) { $HTML5Media{mime} = 'video/ogg'; } elsif ( $HTML5Media{codecs} =~ /vp8.*vorbis/ ) { $HTML5Media{mime} = 'video/webm'; } elsif ( ($HTML5Media{codecs} =~ /^vorbis$/) && ($HTML5Media{extension} eq 'ogg') ) { $HTML5Media{mime} = 'audio/ogg'; } elsif ( ($HTML5Media{codecs} =~ /^vorbis$/) && ($HTML5Media{extension} eq 'webm') ) { $HTML5Media{mime} = 'audio/webm'; } } ### …or just from file extension else { if ( $HTML5Media{extension} eq 'ogv' ) { $HTML5Media{mime} = 'video/ogg'; $HTML5Media{codecs} = 'theora,vorbis'; } if ( $HTML5Media{extension} eq 'oga' ) { $HTML5Media{mime} = 'audio/ogg'; $HTML5Media{codecs} = 'vorbis'; } elsif ( $HTML5Media{extension} eq 'spx' ) { $HTML5Media{mime} = 'audio/ogg'; $HTML5Media{codecs} = 'speex'; } elsif ( $HTML5Media{extension} eq 'opus' ) { $HTML5Media{mime} = 'audio/ogg'; $HTML5Media{codecs} = 'opus'; } elsif ( $HTML5Media{extension} eq 'vtt' ) { $HTML5Media{mime} = 'text/vtt'; } } # codecs if ( $HTML5Media{codecs} ) { $HTML5Media{codecblock} = '; codecs="' . $HTML5Media{codecs} . '"'; } else { $HTML5Media{codecblock} = ''; } # type if ( $HTML5Media{mime} ) { $HTML5Media{typeblock} = ' type=\'' . $HTML5Media{mime} . $HTML5Media{codecblock} . '\''; } else { $HTML5Media{typeblock} = ''; } # element if ( $HTML5Media{mime} =~ /audio/ ) { $HTML5Media{type} = 'audio'; } elsif ( $HTML5Media{mime} =~ /video/ ) { $HTML5Media{type} = 'video'; } elsif ( $HTML5Media{mime} =~ /text/ ) { $HTML5Media{type} = 'track'; } # push if ( $HTML5Media{srcblock} && $HTML5Media{type} ) { push (@HTML5Media_sets, \%HTML5Media); } } # parent element for my $media ( @HTML5Media_sets ) { if ( ($media->{mime}) && ($media->{mime} =~ /audio/) ) { if ( $HTML5MediaParent ne 'video' ) { $HTML5MediaParent = 'audio'; $HTML5MediaWidth = ''; } } elsif ( ($media->{mime}) && ($media->{mime} =~ /video/) ) { $HTML5MediaParent = 'video'; $HTML5MediaWidth = ' width="480"'; } } # child element for my $media ( @HTML5Media_sets ) { if ( ($media->{type}) && ( ($media->{type} eq 'video') || ($media->{type} eq 'audio') ) ) { if ( $media->{type} eq $HTML5MediaParent ) { $media->{child} = 'source'; } } else { $media->{child} = $media->{type}; } } return ( HTML5MediaEnabled => ( (scalar(@HTML5Media_sets) > 0) && ($HTML5MediaParent) ), HTML5MediaSets => \@HTML5Media_sets, HTML5MediaParent => $HTML5MediaParent, HTML5MediaWidth => $HTML5MediaWidth, ); } 1;