package C4::Languages; # Copyright 2006 (C) LibLime # Joshua Ferraro # Portions Copyright 2009 Chris Cormack and the Koha Dev Team # 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., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. use strict; #use warnings; FIXME - Bug 2505 use Carp; use C4::Context; use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $DEBUG); eval { if (C4::Context->ismemcached) { require Memoize::Memcached; import Memoize::Memcached qw(memoize_memcached); memoize_memcached('getTranslatedLanguages', memcached => C4::Context->memcached); memoize_memcached('getFrameworkLanguages' , memcached => C4::Context->memcached); memoize_memcached('getAllLanguages', memcached => C4::Context->memcached); } }; BEGIN { $VERSION = 3.07.00.049; 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 =cut =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 $all_languages = getAllLanguages(); my @languages; my @enabled_languages; if ($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); } else { for my $theme ( _get_themes('opac') ) { push @languages, _get_language_dirs($htdocs,$theme); } } } elsif ($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); } else { foreach my $theme ( _get_themes('intranet') ) { push @languages, _get_language_dirs($htdocs,$theme); } } } 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 = shift || '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 =? AND language_descriptions.lang = ?"); $sth2->execute($language_subtag_registry->{subtag},$current_language); my $sth3 = $dbh->prepare("SELECT description FROM language_descriptions WHERE type='language' AND subtag=? AND lang=?"); # add the correct description info while (my $language_descriptions = $sth2->fetchrow_hashref) { $sth3->execute($language_subtag_registry->{subtag},$language_subtag_registry->{subtag}); my $native_description; while (my $description = $sth3->fetchrow_hashref) { $native_description = $description->{description}; } # fill in the ISO6329 code $language_subtag_registry->{iso639_2_code} = $language_descriptions->{iso639_2_code}; # fill in the native description of the language, as well as the current language's translation of that if it exists if ($native_description) { $language_subtag_registry->{language_description} = $native_description; $language_subtag_registry->{language_description}.=" ($language_descriptions->{description})" if $language_descriptions->{description}; } else { $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|sound|pdf/; 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 %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 => $enabled, }; } return \@languages_loop; } sub language_get_description { my ($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 $bidi; }; sub accept_language { # referenced http://search.cpan.org/src/CGILMORE/I18N-AcceptLanguage-1.04/lib/I18N/AcceptLanguage.pm my ($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}; my $subtag = $language->{rfc4646_subtag}; $supportedLanguages{lc($subtag)} = $subtag; if ( $subtag =~ /^([^-]+)-?/ ) { $secondaryLanguages{lc($1)} = $subtag; } } # 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