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tipaul authored Mar 9, 2007
1 package C4::Languages;
2
3 # Copyright 2006 (C) LibLime
4 # Joshua Ferraro <jmf@liblime.com>
5 #
6 # This file is part of Koha.
7 #
8 # Koha is free software; you can redistribute it and/or modify it under the
9 # terms of the GNU General Public License as published by the Free Software
10 # Foundation; either version 2 of the License, or (at your option) any later
11 # version.
12 #
13 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
14 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
15 # A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 #
17 # You should have received a copy of the GNU General Public License along with
18 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
19 # Suite 330, Boston, MA 02111-1307 USA
20
21
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22 use strict;
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23 #use warnings; #FIXME: turn off warnings before release
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24 use Carp;
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25 use C4::Context;
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26 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $DEBUG);
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27
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28 BEGIN {
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29 $VERSION = 3.00;
30 require Exporter;
31 @ISA = qw(Exporter);
32 @EXPORT = qw(
33 &getFrameworkLanguages
34 &getTranslatedLanguages
35 &getAllLanguages
36 );
37 @EXPORT_OK = qw(getFrameworkLanguages getTranslatedLanguages getAllLanguages get_bidi regex_lang_subtags language_get_description accept_language);
38 $DEBUG = 0;
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39 }
40
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41 =head1 NAME
42
43 C4::Languages - Perl Module containing language list functions for Koha
44
45 =head1 SYNOPSIS
46
47 use C4::Languages;
48
49 =head1 DESCRIPTION
50
51 =head1 FUNCTIONS
52
53 =head2 getFrameworkLanguages
54
55 Returns a reference to an array of hashes:
56
57 my $languages = getFrameworkLanguages();
58 for my $language(@$languages) {
59 print "$language->{language_code}\n"; # language code in iso 639-2
60 print "$language->{language_name}\n"; # language name in native script
61 print "$language->{language_locale_name}\n"; # language name in current locale
62 }
63
64 =cut
65
66 sub getFrameworkLanguages {
67 # get a hash with all language codes, names, and locale names
68 my $all_languages = getAllLanguages();
69 my @languages;
70
71 # find the available directory names
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72 my $dir=C4::Context->config('intranetdir')."/installer/data/";
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73 opendir (MYDIR,$dir);
74 my @listdir= grep { !/^\.|CVS/ && -d "$dir/$_"} readdir(MYDIR);
75 closedir MYDIR;
76
77 # pull out all data for the dir names that exist
78 for my $dirname (@listdir) {
79 for my $language_set (@$all_languages) {
80
81 if ($dirname eq $language_set->{language_code}) {
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82 push @languages, {
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83 'language_code'=>$dirname,
84 'language_description'=>$language_set->{language_description},
85 'native_descrition'=>$language_set->{language_native_description} }
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86 }
87 }
88 }
89 return \@languages;
90 }
91
92 =head2 getTranslatedLanguages
93
94 Returns a reference to an array of hashes:
95
96 my $languages = getTranslatedLanguages();
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97 print "Available translated languages:\n";
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98 for my $language(@$trlanguages) {
99 print "$language->{language_code}\n"; # language code in iso 639-2
100 print "$language->{language_name}\n"; # language name in native script
101 print "$language->{language_locale_name}\n"; # language name in current locale
102 }
103
104 =cut
105
106 sub getTranslatedLanguages {
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107 my ($interface, $theme, $current_language, $which) = @_;
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108 my $htdocs;
109 my $all_languages = getAllLanguages();
110 my @languages;
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111 my @enabled_languages;
112
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113 if ($interface && $interface eq 'opac' ) {
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114 @enabled_languages = split ",", C4::Context->preference('opaclanguages');
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115 $htdocs = C4::Context->config('opachtdocs');
116 if ( $theme and -d "$htdocs/$theme" ) {
117 (@languages) = _get_language_dirs($htdocs,$theme);
118 }
119 else {
120 for my $theme ( _get_themes('opac') ) {
121 push @languages, _get_language_dirs($htdocs,$theme);
122 }
123 }
124 }
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125 elsif ($interface && $interface eq 'intranet' ) {
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126 @enabled_languages = split ",", C4::Context->preference('language');
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127 $htdocs = C4::Context->config('intrahtdocs');
128 if ( $theme and -d "$htdocs/$theme" ) {
129 @languages = _get_language_dirs($htdocs,$theme);
130 }
131 else {
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132 foreach my $theme ( _get_themes('intranet') ) {
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133 push @languages, _get_language_dirs($htdocs,$theme);
134 }
135 }
136 }
137 else {
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138 @enabled_languages = split ",", C4::Context->preference('opaclanguages');
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139 my $htdocs = C4::Context->config('intrahtdocs');
140 foreach my $theme ( _get_themes('intranet') ) {
141 push @languages, _get_language_dirs($htdocs,$theme);
142 }
143 $htdocs = C4::Context->config('opachtdocs');
144 foreach my $theme ( _get_themes('opac') ) {
145 push @languages, _get_language_dirs($htdocs,$theme);
146 }
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147 my %seen;
148 $seen{$_}++ for @languages;
149 @languages = keys %seen;
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150 }
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151 return _build_languages_arrayref($all_languages,\@languages,$current_language,\@enabled_languages);
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152 }
153
154 =head2 getAllLanguages
155
156 Returns a reference to an array of hashes:
157
158 my $alllanguages = getAllLanguages();
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159 print "Available translated languages:\n";
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160 for my $language(@$alllanguages) {
161 print "$language->{language_code}\n";
162 print "$language->{language_name}\n";
163 print "$language->{language_locale_name}\n";
164 }
165
166 =cut
167
168 sub getAllLanguages {
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169 my @languages_loop;
170 my $dbh=C4::Context->dbh;
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171 my $current_language = shift || 'en';
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172 my $sth = $dbh->prepare('SELECT * FROM language_subtag_registry WHERE type=\'language\'');
173 $sth->execute();
174 while (my $language_subtag_registry = $sth->fetchrow_hashref) {
175
176 # pull out all the script descriptions for each language
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177 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 = ?");
178 $sth2->execute($language_subtag_registry->{subtag},$current_language);
179
180 my $sth3 = $dbh->prepare("SELECT description FROM language_descriptions WHERE type='language' AND subtag=? AND lang=?");
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181
182 # add the correct description info
183 while (my $language_descriptions = $sth2->fetchrow_hashref) {
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184 $sth3->execute($language_subtag_registry->{subtag},$language_subtag_registry->{subtag});
185 my $native_description;
186 while (my $description = $sth3->fetchrow_hashref) {
187 $native_description = $description->{description};
188 }
189
190 # fill in the ISO6329 code
191 $language_subtag_registry->{iso639_2_code} = $language_descriptions->{iso639_2_code};
192 # fill in the native description of the language, as well as the current language's translation of that if it exists
193 if ($native_description) {
194 $language_subtag_registry->{language_description} = $native_description;
195 $language_subtag_registry->{language_description}.=" ($language_descriptions->{description})" if $language_descriptions->{description};
196 }
197 else {
198 $language_subtag_registry->{language_description} = $language_descriptions->{description};
199 }
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200 }
201 push @languages_loop, $language_subtag_registry;
202 }
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203 return \@languages_loop;
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204 }
205
206 =head2 _get_themes
207
208 Internal function, returns an array of all available themes.
209
210 (@themes) = &_get_themes('opac');
211 (@themes) = &_get_themes('intranet');
212
213 =cut
214
215 sub _get_themes {
216 my $interface = shift;
217 my $htdocs;
218 my @themes;
219 if ( $interface eq 'intranet' ) {
220 $htdocs = C4::Context->config('intrahtdocs');
221 }
222 else {
223 $htdocs = C4::Context->config('opachtdocs');
224 }
225 opendir D, "$htdocs";
226 my @dirlist = readdir D;
227 foreach my $directory (@dirlist) {
228 # if there's an en dir, it's a valid theme
229 -d "$htdocs/$directory/en" and push @themes, $directory;
230 }
231 return @themes;
232 }
233
234 =head2 _get_language_dirs
235
236 Internal function, returns an array of directory names, excluding non-language directories
237
238 =cut
239
240 sub _get_language_dirs {
241 my ($htdocs,$theme) = @_;
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242 my @lang_strings;
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243 opendir D, "$htdocs/$theme";
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244 for my $lang_string ( readdir D ) {
245 next if $lang_string =~/^\./;
246 next if $lang_string eq 'all';
247 next if $lang_string =~/png$/;
248 next if $lang_string =~/css$/;
249 next if $lang_string =~/CVS$/;
250 next if $lang_string =~/\.txt$/i; #Don't read the readme.txt !
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251 next if $lang_string =~/img|images|famfam/;
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252 push @lang_strings, $lang_string;
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253 }
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254 return (@lang_strings);
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255 }
256
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257 =head2 _build_languages_arrayref
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258
259 Internal function for building the ref to array of hashes
260
261 FIXME: this could be rewritten and simplified using map
262
263 =cut
264
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265 sub _build_languages_arrayref {
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266 my ($all_languages,$translated_languages,$current_language,$enabled_languages) = @_;
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267 my @translated_languages = @$translated_languages;
268 my @languages_loop; # the final reference to an array of hashrefs
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269 my @enabled_languages = @$enabled_languages;
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270 # how many languages are enabled, if one, take note, some contexts won't need to display it
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271 my %seen_languages; # the language tags we've seen
272 my %found_languages;
273 my $language_groups;
274 my $track_language_groups;
275 my $current_language_regex = regex_lang_subtags($current_language);
276 # Loop through the translated languages
277 for my $translated_language (@translated_languages) {
278 # separate the language string into its subtag types
279 my $language_subtags_hashref = regex_lang_subtags($translated_language);
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280
281 # is this language string 'enabled'?
282 for my $enabled_language (@enabled_languages) {
283 #warn "Checking out if $translated_language eq $enabled_language";
284 $language_subtags_hashref->{'enabled'} = 1 if $translated_language eq $enabled_language;
285 }
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286
287 # group this language, key by langtag
288 $language_subtags_hashref->{'sublanguage_current'} = 1 if $translated_language eq $current_language;
289 $language_subtags_hashref->{'rfc4646_subtag'} = $translated_language;
290 $language_subtags_hashref->{'native_description'} = language_get_description($language_subtags_hashref->{language},$language_subtags_hashref->{language},'language');
291 $language_subtags_hashref->{'script_description'} = language_get_description($language_subtags_hashref->{script},$language_subtags_hashref->{'language'},'script');
292 $language_subtags_hashref->{'region_description'} = language_get_description($language_subtags_hashref->{region},$language_subtags_hashref->{'language'},'region');
293 $language_subtags_hashref->{'variant_description'} = language_get_description($language_subtags_hashref->{variant},$language_subtags_hashref->{'language'},'variant');
294 $track_language_groups->{$language_subtags_hashref->{'language'}}++;
295 push ( @{ $language_groups->{$language_subtags_hashref->{language}} }, $language_subtags_hashref );
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296 }
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297 # $key is a language subtag like 'en'
298 while( my ($key, $value) = each %$language_groups) {
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299
300 # is this language group enabled? are any of the languages within it enabled?
301 my $enabled;
302 for my $enabled_language (@enabled_languages) {
303 my $regex_enabled_language = regex_lang_subtags($enabled_language);
304 $enabled = 1 if $key eq $regex_enabled_language->{language};
305 }
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306 push @languages_loop, {
307 # this is only use if there is one
308 rfc4646_subtag => @$value[0]->{rfc4646_subtag},
309 native_description => language_get_description($key,$key,'language'),
310 language => $key,
311 sublanguages_loop => $value,
312 plural => $track_language_groups->{$key} >1 ? 1 : 0,
313 current => $current_language_regex->{language} eq $key ? 1 : 0,
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314 group_enabled => $enabled,
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315 };
316 }
317 return \@languages_loop;
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318 }
319
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320 sub language_get_description {
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321 my ($script,$lang,$type) = @_;
322 my $dbh = C4::Context->dbh;
323 my $desc;
324 my $sth = $dbh->prepare("SELECT description FROM language_descriptions WHERE subtag=? AND lang=? AND type=?");
325 #warn "QUERY: SELECT description FROM language_descriptions WHERE subtag=$script AND lang=$lang AND type=$type";
326 $sth->execute($script,$lang,$type);
327 while (my $descriptions = $sth->fetchrow_hashref) {
328 $desc = $descriptions->{'description'};
329 }
330 unless ($desc) {
331 $sth = $dbh->prepare("SELECT description FROM language_descriptions WHERE subtag=? AND lang=? AND type=?");
332 $sth->execute($script,'en',$type);
333 while (my $descriptions = $sth->fetchrow_hashref) {
334 $desc = $descriptions->{'description'};
335 }
336 }
337 return $desc;
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338 }
339 =head2 regex_lang_subtags
340
341 This internal sub takes a string composed according to RFC 4646 as
342 an input and returns a reference to a hash containing keys and values
343 for ( language, script, region, variant, extension, privateuse )
344
345 =cut
346
347 sub regex_lang_subtags {
348 my $string = shift;
349
350 # Regex for recognizing RFC 4646 well-formed tags
351 # http://www.rfc-editor.org/rfc/rfc4646.txt
352
353 # regexes based on : http://unicode.org/cldr/data/tools/java/org/unicode/cldr/util/data/langtagRegex.txt
354 # The structure requires no forward references, so it reverses the order.
355 # The uppercase comments are fragments copied from RFC 4646
356 #
357 # Note: the tool requires that any real "=" or "#" or ";" in the regex be escaped.
358
359 my $alpha = qr/[a-zA-Z]/ ; # ALPHA
360 my $digit = qr/[0-9]/ ; # DIGIT
361 my $alphanum = qr/[a-zA-Z0-9]/ ; # ALPHA / DIGIT
362 my $x = qr/[xX]/ ; # private use singleton
363 my $singleton = qr/[a-w y-z A-W Y-Z]/ ; # other singleton
364 my $s = qr/[-]/ ; # separator -- lenient parsers will use [-_]
365
366 # Now do the components. The structure is slightly different to allow for capturing the right components.
367 # The notation (?:....) is a non-capturing version of (...): so the "?:" can be deleted if someone doesn't care about capturing.
368
369 my $extlang = qr{(?: $s $alpha{3} )}x ; # *3("-" 3ALPHA)
370 my $language = qr{(?: $alpha{2,3} | $alpha{4,8} )}x ;
371 #my $language = qr{(?: $alpha{2,3}$extlang{0,3} | $alpha{4,8} )}x ; # (2*3ALPHA [ extlang ]) / 4ALPHA / 5*8ALPHA
372
373 my $script = qr{(?: $alpha{4} )}x ; # 4ALPHA
374
375 my $region = qr{(?: $alpha{2} | $digit{3} )}x ; # 2ALPHA / 3DIGIT
376
377 my $variantSub = qr{(?: $digit$alphanum{3} | $alphanum{5,8} )}x ; # *("-" variant), 5*8alphanum / (DIGIT 3alphanum)
378 my $variant = qr{(?: $variantSub (?: $s$variantSub )* )}x ; # *("-" variant), 5*8alphanum / (DIGIT 3alphanum)
379
380 my $extensionSub = qr{(?: $singleton (?: $s$alphanum{2,8} )+ )}x ; # singleton 1*("-" (2*8alphanum))
381 my $extension = qr{(?: $extensionSub (?: $s$extensionSub )* )}x ; # singleton 1*("-" (2*8alphanum))
382
383 my $privateuse = qr{(?: $x (?: $s$alphanum{1,8} )+ )}x ; # ("x"/"X") 1*("-" (1*8alphanum))
384
385 # Define certain grandfathered codes, since otherwise the regex is pretty useless.
386 # Since these are limited, this is safe even later changes to the registry --
387 # the only oddity is that it might change the type of the tag, and thus
388 # the results from the capturing groups.
389 # http://www.iana.org/assignments/language-subtag-registry
390 # Note that these have to be compared case insensitively, requiring (?i) below.
391
392 my $grandfathered = qr{(?: (?i)
393 en $s GB $s oed
394 | i $s (?: ami | bnn | default | enochian | hak | klingon | lux | mingo | navajo | pwn | tao | tay | tsu )
395 | sgn $s (?: BE $s fr | BE $s nl | CH $s de)
396 )}x;
397
398 # For well-formedness, we don't need the ones that would otherwise pass, so they are commented out here
399
400 # | art $s lojban
401 # | cel $s gaulish
402 # | en $s (?: boont | GB $s oed | scouse )
403 # | no $s (?: bok | nyn)
404 # | zh $s (?: cmn | cmn $s Hans | cmn $s Hant | gan | guoyu | hakka | min | min $s nan | wuu | xiang | yue)
405
406 # Here is the final breakdown, with capturing groups for each of these components
407 # The language, variants, extensions, grandfathered, and private-use may have interior '-'
408
409 #my $root = qr{(?: ($language) (?: $s ($script) )? 40% (?: $s ($region) )? 40% (?: $s ($variant) )? 10% (?: $s ($extension) )? 5% (?: $s ($privateuse) )? 5% ) 90% | ($grandfathered) 5% | ($privateuse) 5% };
410
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411 $string =~ qr{^ (?:($language)) (?:$s($script))? (?:$s($region))? (?:$s($variant))? (?:$s($extension))? (?:$s($privateuse))? $}xi; # |($grandfathered) | ($privateuse) $}xi;
412 my %subtag = (
413 'rfc4646_subtag' => $string,
6072ccc Improvements to handling language subtags
Joshua Ferraro authored Nov 11, 2007
414 'language' => $1,
415 'script' => $2,
416 'region' => $3,
417 'variant' => $4,
418 'extension' => $5,
419 'privateuse' => $6,
420 );
421 return \%subtag;
422 }
423
424 # Script Direction Resources:
425 # http://www.w3.org/International/questions/qa-scripts
426 sub get_bidi {
802b13e fix for 1754; fixing I18N BiDi, improvements to handling of language
Joshua Ferraro authored Jan 9, 2008
427 my ($language_script)= @_;
428 my $dbh = C4::Context->dbh;
429 my $bidi;
430 my $sth = $dbh->prepare('SELECT bidi FROM language_script_bidi WHERE rfc4646_subtag=?');
431 $sth->execute($language_script);
432 while (my $result = $sth->fetchrow_hashref) {
433 $bidi = $result->{'bidi'};
434 }
435 return $bidi;
6072ccc Improvements to handling language subtags
Joshua Ferraro authored Nov 11, 2007
436 };
437
c7f22f8 additional updates to language support
Joshua Ferraro authored Jan 5, 2008
438 sub accept_language {
802b13e fix for 1754; fixing I18N BiDi, improvements to handling of language
Joshua Ferraro authored Jan 9, 2008
439 # referenced http://search.cpan.org/src/CGILMORE/I18N-AcceptLanguage-1.04/lib/I18N/AcceptLanguage.pm
440 # FIXME: since this is only used in Output.pm as of Jan 8 2008, maybe it should be IN Output.pm
441 my ($clientPreferences,$supportedLanguages) = @_;
442 my @languages = ();
443 if ($clientPreferences) {
444 # There should be no whitespace anways, but a cleanliness/sanity check
445 $clientPreferences =~ s/\s//g;
446 # Prepare the list of client-acceptable languages
447 foreach my $tag (split(/,/, $clientPreferences)) {
448 my ($language, $quality) = split(/\;/, $tag);
449 $quality =~ s/^q=//i if $quality;
450 $quality = 1 unless $quality;
451 next if $quality <= 0;
452 # We want to force the wildcard to be last
453 $quality = 0 if ($language eq '*');
454 # Pushing lowercase language here saves processing later
455 push(@languages, { quality => $quality,
456 language => $language,
457 lclanguage => lc($language) });
458 }
459 } else {
460 carp "accept_language(x,y) called with no clientPreferences (x).";
461 }
462 # Prepare the list of server-supported languages
463 my %supportedLanguages = ();
464 my %secondaryLanguages = ();
465 foreach my $language (@$supportedLanguages) {
8246a7d @fredericd Bugfix 3176 - Browser selected languages are not use by OPAC
fredericd authored Apr 30, 2009
466 # warn "Language supported: " . $language->{language};
467 my $subtag = $language->{rfc4646_subtag};
468 $supportedLanguages{lc($subtag)} = $subtag;
469 if ( $subtag =~ /^([^-]+)-?/ ) {
470 $secondaryLanguages{lc($1)} = $subtag;
802b13e fix for 1754; fixing I18N BiDi, improvements to handling of language
Joshua Ferraro authored Jan 9, 2008
471 }
472 }
473
474 # Reverse sort the list, making best quality at the front of the array
475 @languages = sort { $b->{quality} <=> $a->{quality} } @languages;
476 my $secondaryMatch = '';
477 foreach my $tag (@languages) {
478 if (exists($supportedLanguages{$tag->{lclanguage}})) {
479 # Client en-us eq server en-us
480 return $supportedLanguages{$tag->{language}} if exists($supportedLanguages{$tag->{language}});
481 return $supportedLanguages{$tag->{lclanguage}};
482 } elsif (exists($secondaryLanguages{$tag->{lclanguage}})) {
483 # Client en eq server en-us
484 return $secondaryLanguages{$tag->{language}} if exists($secondaryLanguages{$tag->{language}});
485 return $supportedLanguages{$tag->{lclanguage}};
486 } elsif ($tag->{lclanguage} =~ /^([^-]+)-/ && exists($secondaryLanguages{$1}) && $secondaryMatch eq '') {
487 # Client en-gb eq server en-us
488 $secondaryMatch = $secondaryLanguages{$1};
489 } elsif ($tag->{lclanguage} =~ /^([^-]+)-/ && exists($secondaryLanguages{$1}) && $secondaryMatch eq '') {
490 # FIXME: We just checked the exact same conditional!
491 # Client en-us eq server en
492 $secondaryMatch = $supportedLanguages{$1};
493 } elsif ($tag->{lclanguage} eq '*') {
494 # * matches every language not already specified.
495 # It doesn't care which we pick, so let's pick the default,
496 # if available, then the first in the array.
497 #return $acceptor->defaultLanguage() if $acceptor->defaultLanguage();
498 return $supportedLanguages->[0];
499 }
500 }
501 # No primary matches. Secondary? (ie, en-us requested and en supported)
502 return $secondaryMatch if $secondaryMatch;
503 return undef; # else, we got nothing.
c7f22f8 additional updates to language support
Joshua Ferraro authored Jan 5, 2008
504 }
f8e9fb6 rel_3_0 moved to HEAD (introducing new files)
tipaul authored Mar 9, 2007
505 1;
506
507 __END__
508
509 =head1 AUTHOR
510
511 Joshua Ferraro
512
513 =cut
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