505 lines
20 KiB
Perl
505 lines
20 KiB
Perl
package C4::Languages;
|
|
|
|
# Copyright 2006 (C) LibLime
|
|
# Joshua Ferraro <jmf@liblime.com>
|
|
#
|
|
# 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 2 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, write to the Free Software Foundation, Inc., 59 Temple Place,
|
|
# Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
|
|
use strict;
|
|
#use warnings; #FIXME: turn off warnings before release
|
|
use Carp;
|
|
use C4::Context;
|
|
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $DEBUG);
|
|
|
|
BEGIN {
|
|
$VERSION = 3.00;
|
|
require Exporter;
|
|
@ISA = qw(Exporter);
|
|
@EXPORT = qw(
|
|
&getFrameworkLanguages
|
|
&getTranslatedLanguages
|
|
&getAllLanguages
|
|
);
|
|
@EXPORT_OK = qw(getFrameworkLanguages getTranslatedLanguages getAllLanguages get_bidi regex_lang_subtags language_get_description accept_language);
|
|
$DEBUG = 0;
|
|
}
|
|
|
|
=head1 NAME
|
|
|
|
C4::Languages - Perl Module containing language list functions for Koha
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
use C4::Languages;
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
=head1 FUNCTIONS
|
|
|
|
=head2 getFrameworkLanguages
|
|
|
|
Returns a reference to an array of hashes:
|
|
|
|
my $languages = getFrameworkLanguages();
|
|
for my $language(@$languages) {
|
|
print "$language->{language_code}\n"; # language code in iso 639-2
|
|
print "$language->{language_name}\n"; # language name in native script
|
|
print "$language->{language_locale_name}\n"; # language name in current locale
|
|
}
|
|
|
|
=cut
|
|
|
|
sub getFrameworkLanguages {
|
|
# get a hash with all language codes, names, and locale names
|
|
my $all_languages = getAllLanguages();
|
|
my @languages;
|
|
|
|
# find the available directory names
|
|
my $dir=C4::Context->config('intranetdir')."/installer/data/";
|
|
opendir (MYDIR,$dir);
|
|
my @listdir= grep { !/^\.|CVS/ && -d "$dir/$_"} readdir(MYDIR);
|
|
closedir MYDIR;
|
|
|
|
# pull out all data for the dir names that exist
|
|
for my $dirname (@listdir) {
|
|
for my $language_set (@$all_languages) {
|
|
|
|
if ($dirname eq $language_set->{language_code}) {
|
|
push @languages, {
|
|
'language_code'=>$dirname,
|
|
'language_description'=>$language_set->{language_description},
|
|
'native_descrition'=>$language_set->{language_native_description} }
|
|
}
|
|
}
|
|
}
|
|
return \@languages;
|
|
}
|
|
|
|
=head2 getTranslatedLanguages
|
|
|
|
Returns a reference to an array of hashes:
|
|
|
|
my $languages = getTranslatedLanguages();
|
|
print "Available translated languages:\n";
|
|
for my $language(@$trlanguages) {
|
|
print "$language->{language_code}\n"; # language code in iso 639-2
|
|
print "$language->{language_name}\n"; # language name in native script
|
|
print "$language->{language_locale_name}\n"; # language name in current locale
|
|
}
|
|
|
|
=cut
|
|
|
|
sub getTranslatedLanguages {
|
|
my ($interface, $theme, $current_language, $which) = @_;
|
|
my $htdocs;
|
|
my $all_languages = getAllLanguages();
|
|
my @languages;
|
|
my $lang;
|
|
my @enabled_languages;
|
|
|
|
if ($interface && $interface eq 'opac' ) {
|
|
@enabled_languages = split ",", C4::Context->preference('opaclanguages');
|
|
$htdocs = C4::Context->config('opachtdocs');
|
|
if ( $theme and -d "$htdocs/$theme" ) {
|
|
(@languages) = _get_language_dirs($htdocs,$theme);
|
|
return _build_languages_arrayref($all_languages,\@languages,$current_language,\@enabled_languages);
|
|
}
|
|
else {
|
|
for my $theme ( _get_themes('opac') ) {
|
|
push @languages, _get_language_dirs($htdocs,$theme);
|
|
}
|
|
return _build_languages_arrayref($all_languages,\@languages,$current_language,\@enabled_languages);
|
|
}
|
|
}
|
|
elsif ($interface && $interface eq 'intranet' ) {
|
|
@enabled_languages = split ",", C4::Context->preference('language');
|
|
$htdocs = C4::Context->config('intrahtdocs');
|
|
if ( $theme and -d "$htdocs/$theme" ) {
|
|
@languages = _get_language_dirs($htdocs,$theme);
|
|
return _build_languages_arrayref($all_languages,\@languages,$current_language,\@enabled_languages);
|
|
}
|
|
else {
|
|
foreach my $theme ( _get_themes('intranet') ) {
|
|
push @languages, _get_language_dirs($htdocs,$theme);
|
|
}
|
|
return _build_languages_arrayref($all_languages,\@languages,$current_language,\@enabled_languages);
|
|
}
|
|
}
|
|
else {
|
|
@enabled_languages = split ",", C4::Context->preference('opaclanguages');
|
|
my $htdocs = C4::Context->config('intrahtdocs');
|
|
foreach my $theme ( _get_themes('intranet') ) {
|
|
push @languages, _get_language_dirs($htdocs,$theme);
|
|
}
|
|
$htdocs = C4::Context->config('opachtdocs');
|
|
foreach my $theme ( _get_themes('opac') ) {
|
|
push @languages, _get_language_dirs($htdocs,$theme);
|
|
}
|
|
my %seen;
|
|
$seen{$_}++ for @languages;
|
|
@languages = keys %seen;
|
|
return _build_languages_arrayref($all_languages,\@languages,$current_language,\@enabled_languages);
|
|
}
|
|
}
|
|
|
|
=head2 getAllLanguages
|
|
|
|
Returns a reference to an array of hashes:
|
|
|
|
my $alllanguages = getAllLanguages();
|
|
print "Available translated languages:\n";
|
|
for my $language(@$alllanguages) {
|
|
print "$language->{language_code}\n";
|
|
print "$language->{language_name}\n";
|
|
print "$language->{language_locale_name}\n";
|
|
}
|
|
|
|
=cut
|
|
|
|
sub getAllLanguages {
|
|
my @languages_loop;
|
|
my $dbh=C4::Context->dbh;
|
|
my $current_language = 'en';
|
|
my $sth = $dbh->prepare('SELECT * FROM language_subtag_registry WHERE type=\'language\'');
|
|
$sth->execute();
|
|
while (my $language_subtag_registry = $sth->fetchrow_hashref) {
|
|
|
|
# pull out all the script descriptions for each language
|
|
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 =?");
|
|
$sth2->execute($language_subtag_registry->{subtag});
|
|
|
|
# add the correct description info
|
|
while (my $language_descriptions = $sth2->fetchrow_hashref) {
|
|
# fill in the ISO6329 code
|
|
$language_subtag_registry->{iso639_2_code} = $language_descriptions->{iso639_2_code};
|
|
$language_subtag_registry->{language_description} = $language_descriptions->{description};
|
|
}
|
|
push @languages_loop, $language_subtag_registry;
|
|
}
|
|
return \@languages_loop;
|
|
}
|
|
|
|
=head2 _get_themes
|
|
|
|
Internal function, returns an array of all available themes.
|
|
|
|
(@themes) = &_get_themes('opac');
|
|
(@themes) = &_get_themes('intranet');
|
|
|
|
=cut
|
|
|
|
sub _get_themes {
|
|
my $interface = shift;
|
|
my $htdocs;
|
|
my @themes;
|
|
if ( $interface eq 'intranet' ) {
|
|
$htdocs = C4::Context->config('intrahtdocs');
|
|
}
|
|
else {
|
|
$htdocs = C4::Context->config('opachtdocs');
|
|
}
|
|
opendir D, "$htdocs";
|
|
my @dirlist = readdir D;
|
|
foreach my $directory (@dirlist) {
|
|
# if there's an en dir, it's a valid theme
|
|
-d "$htdocs/$directory/en" and push @themes, $directory;
|
|
}
|
|
return @themes;
|
|
}
|
|
|
|
=head2 _get_language_dirs
|
|
|
|
Internal function, returns an array of directory names, excluding non-language directories
|
|
|
|
=cut
|
|
|
|
sub _get_language_dirs {
|
|
my ($htdocs,$theme) = @_;
|
|
my @lang_strings;
|
|
opendir D, "$htdocs/$theme";
|
|
for my $lang_string ( readdir D ) {
|
|
next if $lang_string =~/^\./;
|
|
next if $lang_string eq 'all';
|
|
next if $lang_string =~/png$/;
|
|
next if $lang_string =~/css$/;
|
|
next if $lang_string =~/CVS$/;
|
|
next if $lang_string =~/\.txt$/i; #Don't read the readme.txt !
|
|
next if $lang_string =~/img|images|famfam/;
|
|
push @lang_strings, $lang_string;
|
|
}
|
|
return (@lang_strings);
|
|
}
|
|
|
|
=head2 _build_languages_arrayref
|
|
|
|
Internal function for building the ref to array of hashes
|
|
|
|
FIXME: this could be rewritten and simplified using map
|
|
|
|
=cut
|
|
|
|
sub _build_languages_arrayref {
|
|
my ($all_languages,$translated_languages,$current_language,$enabled_languages) = @_;
|
|
my @translated_languages = @$translated_languages;
|
|
my @languages_loop; # the final reference to an array of hashrefs
|
|
my @enabled_languages = @$enabled_languages;
|
|
# how many languages are enabled, if one, take note, some contexts won't need to display it
|
|
my $one_language_enabled = 1 unless @enabled_languages > 1;
|
|
my %seen_languages; # the language tags we've seen
|
|
my %found_languages;
|
|
my $language_groups;
|
|
my $track_language_groups;
|
|
my $current_language_regex = regex_lang_subtags($current_language);
|
|
# Loop through the translated languages
|
|
for my $translated_language (@translated_languages) {
|
|
# separate the language string into its subtag types
|
|
my $language_subtags_hashref = regex_lang_subtags($translated_language);
|
|
|
|
# is this language string 'enabled'?
|
|
for my $enabled_language (@enabled_languages) {
|
|
#warn "Checking out if $translated_language eq $enabled_language";
|
|
$language_subtags_hashref->{'enabled'} = 1 if $translated_language eq $enabled_language;
|
|
}
|
|
|
|
# group this language, key by langtag
|
|
$language_subtags_hashref->{'sublanguage_current'} = 1 if $translated_language eq $current_language;
|
|
$language_subtags_hashref->{'rfc4646_subtag'} = $translated_language;
|
|
$language_subtags_hashref->{'native_description'} = language_get_description($language_subtags_hashref->{language},$language_subtags_hashref->{language},'language');
|
|
$language_subtags_hashref->{'script_description'} = language_get_description($language_subtags_hashref->{script},$language_subtags_hashref->{'language'},'script');
|
|
$language_subtags_hashref->{'region_description'} = language_get_description($language_subtags_hashref->{region},$language_subtags_hashref->{'language'},'region');
|
|
$language_subtags_hashref->{'variant_description'} = language_get_description($language_subtags_hashref->{variant},$language_subtags_hashref->{'language'},'variant');
|
|
$track_language_groups->{$language_subtags_hashref->{'language'}}++;
|
|
push ( @{ $language_groups->{$language_subtags_hashref->{language}} }, $language_subtags_hashref );
|
|
}
|
|
# $key is a language subtag like 'en'
|
|
while( my ($key, $value) = each %$language_groups) {
|
|
|
|
# is this language group enabled? are any of the languages within it enabled?
|
|
my $enabled;
|
|
for my $enabled_language (@enabled_languages) {
|
|
my $regex_enabled_language = regex_lang_subtags($enabled_language);
|
|
$enabled = 1 if $key eq $regex_enabled_language->{language};
|
|
}
|
|
push @languages_loop, {
|
|
# this is only use if there is one
|
|
rfc4646_subtag => @$value[0]->{rfc4646_subtag},
|
|
native_description => language_get_description($key,$key,'language'),
|
|
language => $key,
|
|
sublanguages_loop => $value,
|
|
plural => $track_language_groups->{$key} >1 ? 1 : 0,
|
|
current => $current_language_regex->{language} eq $key ? 1 : 0,
|
|
group_enabled => $enabled,
|
|
one_language_enabled => $one_language_enabled,
|
|
};
|
|
}
|
|
return \@languages_loop;
|
|
}
|
|
|
|
sub language_get_description {
|
|
my ($script,$lang,$type) = @_;
|
|
my $dbh = C4::Context->dbh;
|
|
my $desc;
|
|
my $sth = $dbh->prepare("SELECT description FROM language_descriptions WHERE subtag=? AND lang=? AND type=?");
|
|
#warn "QUERY: SELECT description FROM language_descriptions WHERE subtag=$script AND lang=$lang AND type=$type";
|
|
$sth->execute($script,$lang,$type);
|
|
while (my $descriptions = $sth->fetchrow_hashref) {
|
|
$desc = $descriptions->{'description'};
|
|
}
|
|
unless ($desc) {
|
|
$sth = $dbh->prepare("SELECT description FROM language_descriptions WHERE subtag=? AND lang=? AND type=?");
|
|
$sth->execute($script,'en',$type);
|
|
while (my $descriptions = $sth->fetchrow_hashref) {
|
|
$desc = $descriptions->{'description'};
|
|
}
|
|
}
|
|
return $desc;
|
|
}
|
|
=head2 regex_lang_subtags
|
|
|
|
This internal sub takes a string composed according to RFC 4646 as
|
|
an input and returns a reference to a hash containing keys and values
|
|
for ( language, script, region, variant, extension, privateuse )
|
|
|
|
=cut
|
|
|
|
sub regex_lang_subtags {
|
|
my $string = shift;
|
|
|
|
# Regex for recognizing RFC 4646 well-formed tags
|
|
# http://www.rfc-editor.org/rfc/rfc4646.txt
|
|
|
|
# regexes based on : http://unicode.org/cldr/data/tools/java/org/unicode/cldr/util/data/langtagRegex.txt
|
|
# The structure requires no forward references, so it reverses the order.
|
|
# The uppercase comments are fragments copied from RFC 4646
|
|
#
|
|
# Note: the tool requires that any real "=" or "#" or ";" in the regex be escaped.
|
|
|
|
my $alpha = qr/[a-zA-Z]/ ; # ALPHA
|
|
my $digit = qr/[0-9]/ ; # DIGIT
|
|
my $alphanum = qr/[a-zA-Z0-9]/ ; # ALPHA / DIGIT
|
|
my $x = qr/[xX]/ ; # private use singleton
|
|
my $singleton = qr/[a-w y-z A-W Y-Z]/ ; # other singleton
|
|
my $s = qr/[-]/ ; # separator -- lenient parsers will use [-_]
|
|
|
|
# Now do the components. The structure is slightly different to allow for capturing the right components.
|
|
# The notation (?:....) is a non-capturing version of (...): so the "?:" can be deleted if someone doesn't care about capturing.
|
|
|
|
my $extlang = qr{(?: $s $alpha{3} )}x ; # *3("-" 3ALPHA)
|
|
my $language = qr{(?: $alpha{2,3} | $alpha{4,8} )}x ;
|
|
#my $language = qr{(?: $alpha{2,3}$extlang{0,3} | $alpha{4,8} )}x ; # (2*3ALPHA [ extlang ]) / 4ALPHA / 5*8ALPHA
|
|
|
|
my $script = qr{(?: $alpha{4} )}x ; # 4ALPHA
|
|
|
|
my $region = qr{(?: $alpha{2} | $digit{3} )}x ; # 2ALPHA / 3DIGIT
|
|
|
|
my $variantSub = qr{(?: $digit$alphanum{3} | $alphanum{5,8} )}x ; # *("-" variant), 5*8alphanum / (DIGIT 3alphanum)
|
|
my $variant = qr{(?: $variantSub (?: $s$variantSub )* )}x ; # *("-" variant), 5*8alphanum / (DIGIT 3alphanum)
|
|
|
|
my $extensionSub = qr{(?: $singleton (?: $s$alphanum{2,8} )+ )}x ; # singleton 1*("-" (2*8alphanum))
|
|
my $extension = qr{(?: $extensionSub (?: $s$extensionSub )* )}x ; # singleton 1*("-" (2*8alphanum))
|
|
|
|
my $privateuse = qr{(?: $x (?: $s$alphanum{1,8} )+ )}x ; # ("x"/"X") 1*("-" (1*8alphanum))
|
|
|
|
# Define certain grandfathered codes, since otherwise the regex is pretty useless.
|
|
# Since these are limited, this is safe even later changes to the registry --
|
|
# the only oddity is that it might change the type of the tag, and thus
|
|
# the results from the capturing groups.
|
|
# http://www.iana.org/assignments/language-subtag-registry
|
|
# Note that these have to be compared case insensitively, requiring (?i) below.
|
|
|
|
my $grandfathered = qr{(?: (?i)
|
|
en $s GB $s oed
|
|
| i $s (?: ami | bnn | default | enochian | hak | klingon | lux | mingo | navajo | pwn | tao | tay | tsu )
|
|
| sgn $s (?: BE $s fr | BE $s nl | CH $s de)
|
|
)}x;
|
|
|
|
# For well-formedness, we don't need the ones that would otherwise pass, so they are commented out here
|
|
|
|
# | art $s lojban
|
|
# | cel $s gaulish
|
|
# | en $s (?: boont | GB $s oed | scouse )
|
|
# | no $s (?: bok | nyn)
|
|
# | zh $s (?: cmn | cmn $s Hans | cmn $s Hant | gan | guoyu | hakka | min | min $s nan | wuu | xiang | yue)
|
|
|
|
# Here is the final breakdown, with capturing groups for each of these components
|
|
# The language, variants, extensions, grandfathered, and private-use may have interior '-'
|
|
|
|
#my $root = qr{(?: ($language) (?: $s ($script) )? 40% (?: $s ($region) )? 40% (?: $s ($variant) )? 10% (?: $s ($extension) )? 5% (?: $s ($privateuse) )? 5% ) 90% | ($grandfathered) 5% | ($privateuse) 5% };
|
|
|
|
$string =~ qr{^ (?:($language)) (?:$s($script))? (?:$s($region))? (?:$s($variant))? (?:$s($extension))? (?:$s($privateuse))? $}xi; # |($grandfathered) | ($privateuse) $}xi;
|
|
my %subtag = (
|
|
'rfc4646_subtag' => $string,
|
|
'language' => $1,
|
|
'script' => $2,
|
|
'region' => $3,
|
|
'variant' => $4,
|
|
'extension' => $5,
|
|
'privateuse' => $6,
|
|
);
|
|
return \%subtag;
|
|
}
|
|
|
|
# Script Direction Resources:
|
|
# http://www.w3.org/International/questions/qa-scripts
|
|
sub get_bidi {
|
|
my ($language_script)= @_;
|
|
my $dbh = C4::Context->dbh;
|
|
my $bidi;
|
|
my $sth = $dbh->prepare('SELECT bidi FROM language_script_bidi WHERE rfc4646_subtag=?');
|
|
$sth->execute($language_script);
|
|
while (my $result = $sth->fetchrow_hashref) {
|
|
$bidi = $result->{'bidi'};
|
|
}
|
|
return $bidi;
|
|
};
|
|
|
|
sub accept_language {
|
|
# referenced http://search.cpan.org/src/CGILMORE/I18N-AcceptLanguage-1.04/lib/I18N/AcceptLanguage.pm
|
|
# FIXME: since this is only used in Output.pm as of Jan 8 2008, maybe it should be IN Output.pm
|
|
my ($clientPreferences,$supportedLanguages) = @_;
|
|
my @languages = ();
|
|
if ($clientPreferences) {
|
|
# There should be no whitespace anways, but a cleanliness/sanity check
|
|
$clientPreferences =~ s/\s//g;
|
|
|
|
# Prepare the list of client-acceptable languages
|
|
foreach my $tag (split(/,/, $clientPreferences)) {
|
|
my ($language, $quality) = split(/\;/, $tag);
|
|
$quality =~ s/^q=//i if $quality;
|
|
$quality = 1 unless $quality;
|
|
next if $quality <= 0;
|
|
# We want to force the wildcard to be last
|
|
$quality = 0 if ($language eq '*');
|
|
# Pushing lowercase language here saves processing later
|
|
push(@languages, { quality => $quality,
|
|
language => $language,
|
|
lclanguage => lc($language) });
|
|
}
|
|
} else {
|
|
carp "accept_language(x,y) called with no clientPreferences (x).";
|
|
}
|
|
# Prepare the list of server-supported languages
|
|
my %supportedLanguages = ();
|
|
my %secondaryLanguages = ();
|
|
foreach my $language (@$supportedLanguages) {
|
|
# warn "Language supported: " . $language->{language_code};
|
|
$supportedLanguages{lc($language->{language_code})} = $language->{language_code};
|
|
if ($language->{language_code} =~ /^([^-]+)-?/) {
|
|
$secondaryLanguages{lc($1)} = $language->{language_code};
|
|
}
|
|
}
|
|
|
|
# Reverse sort the list, making best quality at the front of the array
|
|
@languages = sort { $b->{quality} <=> $a->{quality} } @languages;
|
|
my $secondaryMatch = '';
|
|
foreach my $tag (@languages) {
|
|
if (exists($supportedLanguages{$tag->{lclanguage}})) {
|
|
# Client en-us eq server en-us
|
|
return $supportedLanguages{$tag->{language}} if exists($supportedLanguages{$tag->{language}});
|
|
return $supportedLanguages{$tag->{lclanguage}};
|
|
} elsif (exists($secondaryLanguages{$tag->{lclanguage}})) {
|
|
# Client en eq server en-us
|
|
return $secondaryLanguages{$tag->{language}} if exists($secondaryLanguages{$tag->{language}});
|
|
return $supportedLanguages{$tag->{lclanguage}};
|
|
} elsif ($tag->{lclanguage} =~ /^([^-]+)-/ && exists($secondaryLanguages{$1}) && $secondaryMatch eq '') {
|
|
# Client en-gb eq server en-us
|
|
$secondaryMatch = $secondaryLanguages{$1};
|
|
} elsif ($tag->{lclanguage} =~ /^([^-]+)-/ && exists($secondaryLanguages{$1}) && $secondaryMatch eq '') {
|
|
# FIXME: We just checked the exact same conditional!
|
|
# Client en-us eq server en
|
|
$secondaryMatch = $supportedLanguages{$1};
|
|
} elsif ($tag->{lclanguage} eq '*') {
|
|
# * matches every language not already specified.
|
|
# It doesn't care which we pick, so let's pick the default,
|
|
# if available, then the first in the array.
|
|
#return $acceptor->defaultLanguage() if $acceptor->defaultLanguage();
|
|
return $supportedLanguages->[0];
|
|
}
|
|
}
|
|
# No primary matches. Secondary? (ie, en-us requested and en supported)
|
|
return $secondaryMatch if $secondaryMatch;
|
|
return undef; # else, we got nothing.
|
|
}
|
|
1;
|
|
|
|
__END__
|
|
|
|
=head1 AUTHOR
|
|
|
|
Joshua Ferraro
|
|
|
|
=cut
|