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525 lines
21 KiB
525 lines
21 KiB
package C4::Languages;
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# Copyright 2006 (C) LibLime
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# Joshua Ferraro <jmf@liblime.com>
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# Portions Copyright 2009 Chris Cormack and the Koha Dev Team
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# This file is part of Koha.
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#
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# Koha is free software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with Koha; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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use strict;
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#use warnings; FIXME - Bug 2505
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use Carp;
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use C4::Context;
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use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $DEBUG);
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eval {
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if (C4::Context->ismemcached) {
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require Memoize::Memcached;
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import Memoize::Memcached qw(memoize_memcached);
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memoize_memcached('getTranslatedLanguages', memcached => C4::Context->memcached);
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memoize_memcached('getFrameworkLanguages' , memcached => C4::Context->memcached);
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memoize_memcached('getAllLanguages', memcached => C4::Context->memcached);
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}
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};
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BEGIN {
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$VERSION = 3.07.00.049;
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require Exporter;
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@ISA = qw(Exporter);
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@EXPORT = qw(
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&getFrameworkLanguages
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&getTranslatedLanguages
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&getAllLanguages
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);
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@EXPORT_OK = qw(getFrameworkLanguages getTranslatedLanguages getAllLanguages get_bidi regex_lang_subtags language_get_description accept_language);
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$DEBUG = 0;
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}
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=head1 NAME
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C4::Languages - Perl Module containing language list functions for Koha
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=head1 SYNOPSIS
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use C4::Languages;
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=head1 DESCRIPTION
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=cut
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=head1 FUNCTIONS
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=head2 getFrameworkLanguages
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Returns a reference to an array of hashes:
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my $languages = getFrameworkLanguages();
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for my $language(@$languages) {
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print "$language->{language_code}\n"; # language code in iso 639-2
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print "$language->{language_name}\n"; # language name in native script
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print "$language->{language_locale_name}\n"; # language name in current locale
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}
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=cut
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sub getFrameworkLanguages {
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# get a hash with all language codes, names, and locale names
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my $all_languages = getAllLanguages();
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my @languages;
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# find the available directory names
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my $dir=C4::Context->config('intranetdir')."/installer/data/";
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opendir (MYDIR,$dir);
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my @listdir= grep { !/^\.|CVS/ && -d "$dir/$_"} readdir(MYDIR);
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closedir MYDIR;
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# pull out all data for the dir names that exist
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for my $dirname (@listdir) {
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for my $language_set (@$all_languages) {
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if ($dirname eq $language_set->{language_code}) {
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push @languages, {
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'language_code'=>$dirname,
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'language_description'=>$language_set->{language_description},
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'native_descrition'=>$language_set->{language_native_description} }
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}
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}
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}
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return \@languages;
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}
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=head2 getTranslatedLanguages
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Returns a reference to an array of hashes:
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my $languages = getTranslatedLanguages();
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print "Available translated languages:\n";
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for my $language(@$trlanguages) {
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print "$language->{language_code}\n"; # language code in iso 639-2
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print "$language->{language_name}\n"; # language name in native script
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print "$language->{language_locale_name}\n"; # language name in current locale
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}
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=cut
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sub getTranslatedLanguages {
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my ($interface, $theme, $current_language, $which) = @_;
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my $htdocs;
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my $all_languages = getAllLanguages();
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my @languages;
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my @enabled_languages;
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if ($interface && $interface eq 'opac' ) {
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@enabled_languages = split ",", C4::Context->preference('opaclanguages');
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$htdocs = C4::Context->config('opachtdocs');
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if ( $theme and -d "$htdocs/$theme" ) {
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(@languages) = _get_language_dirs($htdocs,$theme);
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}
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else {
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for my $theme ( _get_themes('opac') ) {
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push @languages, _get_language_dirs($htdocs,$theme);
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}
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}
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}
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elsif ($interface && $interface eq 'intranet' ) {
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@enabled_languages = split ",", C4::Context->preference('language');
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$htdocs = C4::Context->config('intrahtdocs');
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if ( $theme and -d "$htdocs/$theme" ) {
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@languages = _get_language_dirs($htdocs,$theme);
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}
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else {
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foreach my $theme ( _get_themes('intranet') ) {
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push @languages, _get_language_dirs($htdocs,$theme);
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}
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}
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}
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else {
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@enabled_languages = split ",", C4::Context->preference('opaclanguages');
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my $htdocs = C4::Context->config('intrahtdocs');
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foreach my $theme ( _get_themes('intranet') ) {
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push @languages, _get_language_dirs($htdocs,$theme);
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}
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$htdocs = C4::Context->config('opachtdocs');
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foreach my $theme ( _get_themes('opac') ) {
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push @languages, _get_language_dirs($htdocs,$theme);
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}
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my %seen;
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$seen{$_}++ for @languages;
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@languages = keys %seen;
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}
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return _build_languages_arrayref($all_languages,\@languages,$current_language,\@enabled_languages);
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}
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=head2 getAllLanguages
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Returns a reference to an array of hashes:
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my $alllanguages = getAllLanguages();
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print "Available translated languages:\n";
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for my $language(@$alllanguages) {
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print "$language->{language_code}\n";
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print "$language->{language_name}\n";
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print "$language->{language_locale_name}\n";
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}
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=cut
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sub getAllLanguages {
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my @languages_loop;
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my $dbh=C4::Context->dbh;
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my $current_language = shift || 'en';
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my $sth = $dbh->prepare('SELECT * FROM language_subtag_registry WHERE type=\'language\'');
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$sth->execute();
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while (my $language_subtag_registry = $sth->fetchrow_hashref) {
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# pull out all the script descriptions for each language
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my $sth2= $dbh->prepare("SELECT * FROM language_descriptions LEFT JOIN language_rfc4646_to_iso639 on language_rfc4646_to_iso639.rfc4646_subtag = language_descriptions.subtag WHERE type='language' AND subtag =? AND language_descriptions.lang = ?");
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$sth2->execute($language_subtag_registry->{subtag},$current_language);
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my $sth3 = $dbh->prepare("SELECT description FROM language_descriptions WHERE type='language' AND subtag=? AND lang=?");
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# add the correct description info
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while (my $language_descriptions = $sth2->fetchrow_hashref) {
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$sth3->execute($language_subtag_registry->{subtag},$language_subtag_registry->{subtag});
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my $native_description;
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while (my $description = $sth3->fetchrow_hashref) {
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$native_description = $description->{description};
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}
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# fill in the ISO6329 code
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$language_subtag_registry->{iso639_2_code} = $language_descriptions->{iso639_2_code};
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# fill in the native description of the language, as well as the current language's translation of that if it exists
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if ($native_description) {
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$language_subtag_registry->{language_description} = $native_description;
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$language_subtag_registry->{language_description}.=" ($language_descriptions->{description})" if $language_descriptions->{description};
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}
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else {
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$language_subtag_registry->{language_description} = $language_descriptions->{description};
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}
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}
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push @languages_loop, $language_subtag_registry;
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}
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return \@languages_loop;
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}
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=head2 _get_themes
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Internal function, returns an array of all available themes.
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(@themes) = &_get_themes('opac');
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(@themes) = &_get_themes('intranet');
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=cut
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sub _get_themes {
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my $interface = shift;
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my $htdocs;
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my @themes;
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if ( $interface eq 'intranet' ) {
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$htdocs = C4::Context->config('intrahtdocs');
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}
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else {
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$htdocs = C4::Context->config('opachtdocs');
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}
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opendir D, "$htdocs";
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my @dirlist = readdir D;
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foreach my $directory (@dirlist) {
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# if there's an en dir, it's a valid theme
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-d "$htdocs/$directory/en" and push @themes, $directory;
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}
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return @themes;
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}
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=head2 _get_language_dirs
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Internal function, returns an array of directory names, excluding non-language directories
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=cut
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sub _get_language_dirs {
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my ($htdocs,$theme) = @_;
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my @lang_strings;
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opendir D, "$htdocs/$theme";
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for my $lang_string ( readdir D ) {
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next if $lang_string =~/^\./;
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next if $lang_string eq 'all';
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next if $lang_string =~/png$/;
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next if $lang_string =~/css$/;
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next if $lang_string =~/CVS$/;
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next if $lang_string =~/\.txt$/i; #Don't read the readme.txt !
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next if $lang_string =~/img|images|famfam|sound|pdf/;
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push @lang_strings, $lang_string;
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}
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return (@lang_strings);
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}
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=head2 _build_languages_arrayref
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Internal function for building the ref to array of hashes
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FIXME: this could be rewritten and simplified using map
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=cut
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sub _build_languages_arrayref {
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my ($all_languages,$translated_languages,$current_language,$enabled_languages) = @_;
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my @translated_languages = @$translated_languages;
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my @languages_loop; # the final reference to an array of hashrefs
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my @enabled_languages = @$enabled_languages;
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# how many languages are enabled, if one, take note, some contexts won't need to display it
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my %seen_languages; # the language tags we've seen
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my %found_languages;
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my $language_groups;
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my $track_language_groups;
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my $current_language_regex = regex_lang_subtags($current_language);
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# Loop through the translated languages
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for my $translated_language (@translated_languages) {
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# separate the language string into its subtag types
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my $language_subtags_hashref = regex_lang_subtags($translated_language);
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# is this language string 'enabled'?
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for my $enabled_language (@enabled_languages) {
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#warn "Checking out if $translated_language eq $enabled_language";
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$language_subtags_hashref->{'enabled'} = 1 if $translated_language eq $enabled_language;
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}
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# group this language, key by langtag
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$language_subtags_hashref->{'sublanguage_current'} = 1 if $translated_language eq $current_language;
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$language_subtags_hashref->{'rfc4646_subtag'} = $translated_language;
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$language_subtags_hashref->{'native_description'} = language_get_description($language_subtags_hashref->{language},$language_subtags_hashref->{language},'language');
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$language_subtags_hashref->{'script_description'} = language_get_description($language_subtags_hashref->{script},$language_subtags_hashref->{'language'},'script');
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$language_subtags_hashref->{'region_description'} = language_get_description($language_subtags_hashref->{region},$language_subtags_hashref->{'language'},'region');
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$language_subtags_hashref->{'variant_description'} = language_get_description($language_subtags_hashref->{variant},$language_subtags_hashref->{'language'},'variant');
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$track_language_groups->{$language_subtags_hashref->{'language'}}++;
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push ( @{ $language_groups->{$language_subtags_hashref->{language}} }, $language_subtags_hashref );
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}
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# $key is a language subtag like 'en'
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while( my ($key, $value) = each %$language_groups) {
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# is this language group enabled? are any of the languages within it enabled?
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my $enabled;
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for my $enabled_language (@enabled_languages) {
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my $regex_enabled_language = regex_lang_subtags($enabled_language);
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$enabled = 1 if $key eq $regex_enabled_language->{language};
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}
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push @languages_loop, {
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# this is only use if there is one
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rfc4646_subtag => @$value[0]->{rfc4646_subtag},
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native_description => language_get_description($key,$key,'language'),
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language => $key,
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sublanguages_loop => $value,
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plural => $track_language_groups->{$key} >1 ? 1 : 0,
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current => $current_language_regex->{language} eq $key ? 1 : 0,
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group_enabled => $enabled,
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};
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}
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return \@languages_loop;
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}
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sub language_get_description {
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my ($script,$lang,$type) = @_;
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my $dbh = C4::Context->dbh;
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my $desc;
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my $sth = $dbh->prepare("SELECT description FROM language_descriptions WHERE subtag=? AND lang=? AND type=?");
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#warn "QUERY: SELECT description FROM language_descriptions WHERE subtag=$script AND lang=$lang AND type=$type";
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$sth->execute($script,$lang,$type);
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while (my $descriptions = $sth->fetchrow_hashref) {
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$desc = $descriptions->{'description'};
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}
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unless ($desc) {
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$sth = $dbh->prepare("SELECT description FROM language_descriptions WHERE subtag=? AND lang=? AND type=?");
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$sth->execute($script,'en',$type);
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while (my $descriptions = $sth->fetchrow_hashref) {
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$desc = $descriptions->{'description'};
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}
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}
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return $desc;
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}
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=head2 regex_lang_subtags
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This internal sub takes a string composed according to RFC 4646 as
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an input and returns a reference to a hash containing keys and values
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for ( language, script, region, variant, extension, privateuse )
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=cut
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sub regex_lang_subtags {
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my $string = shift;
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# Regex for recognizing RFC 4646 well-formed tags
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# http://www.rfc-editor.org/rfc/rfc4646.txt
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# regexes based on : http://unicode.org/cldr/data/tools/java/org/unicode/cldr/util/data/langtagRegex.txt
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# The structure requires no forward references, so it reverses the order.
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# The uppercase comments are fragments copied from RFC 4646
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#
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# Note: the tool requires that any real "=" or "#" or ";" in the regex be escaped.
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my $alpha = qr/[a-zA-Z]/ ; # ALPHA
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my $digit = qr/[0-9]/ ; # DIGIT
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my $alphanum = qr/[a-zA-Z0-9]/ ; # ALPHA / DIGIT
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my $x = qr/[xX]/ ; # private use singleton
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my $singleton = qr/[a-w y-z A-W Y-Z]/ ; # other singleton
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my $s = qr/[-]/ ; # separator -- lenient parsers will use [-_]
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# Now do the components. The structure is slightly different to allow for capturing the right components.
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# The notation (?:....) is a non-capturing version of (...): so the "?:" can be deleted if someone doesn't care about capturing.
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my $extlang = qr{(?: $s $alpha{3} )}x ; # *3("-" 3ALPHA)
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my $language = qr{(?: $alpha{2,3} | $alpha{4,8} )}x ;
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#my $language = qr{(?: $alpha{2,3}$extlang{0,3} | $alpha{4,8} )}x ; # (2*3ALPHA [ extlang ]) / 4ALPHA / 5*8ALPHA
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my $script = qr{(?: $alpha{4} )}x ; # 4ALPHA
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my $region = qr{(?: $alpha{2} | $digit{3} )}x ; # 2ALPHA / 3DIGIT
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my $variantSub = qr{(?: $digit$alphanum{3} | $alphanum{5,8} )}x ; # *("-" variant), 5*8alphanum / (DIGIT 3alphanum)
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my $variant = qr{(?: $variantSub (?: $s$variantSub )* )}x ; # *("-" variant), 5*8alphanum / (DIGIT 3alphanum)
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my $extensionSub = qr{(?: $singleton (?: $s$alphanum{2,8} )+ )}x ; # singleton 1*("-" (2*8alphanum))
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my $extension = qr{(?: $extensionSub (?: $s$extensionSub )* )}x ; # singleton 1*("-" (2*8alphanum))
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my $privateuse = qr{(?: $x (?: $s$alphanum{1,8} )+ )}x ; # ("x"/"X") 1*("-" (1*8alphanum))
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# Define certain grandfathered codes, since otherwise the regex is pretty useless.
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# Since these are limited, this is safe even later changes to the registry --
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# the only oddity is that it might change the type of the tag, and thus
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# the results from the capturing groups.
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# http://www.iana.org/assignments/language-subtag-registry
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# Note that these have to be compared case insensitively, requiring (?i) below.
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my $grandfathered = qr{(?: (?i)
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en $s GB $s oed
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| i $s (?: ami | bnn | default | enochian | hak | klingon | lux | mingo | navajo | pwn | tao | tay | tsu )
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| sgn $s (?: BE $s fr | BE $s nl | CH $s de)
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)}x;
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# For well-formedness, we don't need the ones that would otherwise pass, so they are commented out here
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# | art $s lojban
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# | cel $s gaulish
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# | en $s (?: boont | GB $s oed | scouse )
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# | no $s (?: bok | nyn)
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# | zh $s (?: cmn | cmn $s Hans | cmn $s Hant | gan | guoyu | hakka | min | min $s nan | wuu | xiang | yue)
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# Here is the final breakdown, with capturing groups for each of these components
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# The language, variants, extensions, grandfathered, and private-use may have interior '-'
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#my $root = qr{(?: ($language) (?: $s ($script) )? 40% (?: $s ($region) )? 40% (?: $s ($variant) )? 10% (?: $s ($extension) )? 5% (?: $s ($privateuse) )? 5% ) 90% | ($grandfathered) 5% | ($privateuse) 5% };
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$string =~ qr{^ (?:($language)) (?:$s($script))? (?:$s($region))? (?:$s($variant))? (?:$s($extension))? (?:$s($privateuse))? $}xi; # |($grandfathered) | ($privateuse) $}xi;
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my %subtag = (
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'rfc4646_subtag' => $string,
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'language' => $1,
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'script' => $2,
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'region' => $3,
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'variant' => $4,
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'extension' => $5,
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'privateuse' => $6,
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);
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return \%subtag;
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}
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# Script Direction Resources:
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# http://www.w3.org/International/questions/qa-scripts
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sub get_bidi {
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my ($language_script)= @_;
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my $dbh = C4::Context->dbh;
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my $bidi;
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my $sth = $dbh->prepare('SELECT bidi FROM language_script_bidi WHERE rfc4646_subtag=?');
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$sth->execute($language_script);
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while (my $result = $sth->fetchrow_hashref) {
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$bidi = $result->{'bidi'};
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}
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return $bidi;
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};
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sub accept_language {
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# referenced http://search.cpan.org/src/CGILMORE/I18N-AcceptLanguage-1.04/lib/I18N/AcceptLanguage.pm
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my ($clientPreferences,$supportedLanguages) = @_;
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my @languages = ();
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if ($clientPreferences) {
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# There should be no whitespace anways, but a cleanliness/sanity check
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$clientPreferences =~ s/\s//g;
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# Prepare the list of client-acceptable languages
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foreach my $tag (split(/,/, $clientPreferences)) {
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my ($language, $quality) = split(/\;/, $tag);
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$quality =~ s/^q=//i if $quality;
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$quality = 1 unless $quality;
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next if $quality <= 0;
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# We want to force the wildcard to be last
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$quality = 0 if ($language eq '*');
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# Pushing lowercase language here saves processing later
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push(@languages, { quality => $quality,
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language => $language,
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lclanguage => lc($language) });
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}
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} else {
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carp "accept_language(x,y) called with no clientPreferences (x).";
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}
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# Prepare the list of server-supported languages
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my %supportedLanguages = ();
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my %secondaryLanguages = ();
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foreach my $language (@$supportedLanguages) {
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# warn "Language supported: " . $language->{language};
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my $subtag = $language->{rfc4646_subtag};
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$supportedLanguages{lc($subtag)} = $subtag;
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if ( $subtag =~ /^([^-]+)-?/ ) {
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$secondaryLanguages{lc($1)} = $subtag;
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}
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}
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# Reverse sort the list, making best quality at the front of the array
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@languages = sort { $b->{quality} <=> $a->{quality} } @languages;
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my $secondaryMatch = '';
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foreach my $tag (@languages) {
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if (exists($supportedLanguages{$tag->{lclanguage}})) {
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# Client en-us eq server en-us
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return $supportedLanguages{$tag->{language}} if exists($supportedLanguages{$tag->{language}});
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return $supportedLanguages{$tag->{lclanguage}};
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} elsif (exists($secondaryLanguages{$tag->{lclanguage}})) {
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# Client en eq server en-us
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return $secondaryLanguages{$tag->{language}} if exists($secondaryLanguages{$tag->{language}});
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return $supportedLanguages{$tag->{lclanguage}};
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} elsif ($tag->{lclanguage} =~ /^([^-]+)-/ && exists($secondaryLanguages{$1}) && $secondaryMatch eq '') {
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# Client en-gb eq server en-us
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$secondaryMatch = $secondaryLanguages{$1};
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} elsif ($tag->{lclanguage} =~ /^([^-]+)-/ && exists($secondaryLanguages{$1}) && $secondaryMatch eq '') {
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# FIXME: We just checked the exact same conditional!
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# Client en-us eq server en
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$secondaryMatch = $supportedLanguages{$1};
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} elsif ($tag->{lclanguage} eq '*') {
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# * matches every language not already specified.
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# It doesn't care which we pick, so let's pick the default,
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# if available, then the first in the array.
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#return $acceptor->defaultLanguage() if $acceptor->defaultLanguage();
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return $supportedLanguages->[0];
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}
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}
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# No primary matches. Secondary? (ie, en-us requested and en supported)
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return $secondaryMatch if $secondaryMatch;
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return undef; # else, we got nothing.
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}
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1;
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__END__
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=head1 AUTHOR
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Joshua Ferraro
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=cut
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