1 |
|
2 |
|
3 |
|
4 |
|
5 |
|
6 |
|
7 |
|
8 |
|
9 |
|
10 |
|
11 |
|
12 |
|
13 |
|
14 |
|
15 |
|
16 |
|
17 |
|
18 |
|
19 |
|
20 |
|
21 |
|
22 | 'use strict';
|
23 |
|
24 |
|
25 | var parser = require('./lib/parser');
|
26 | var plural = require('plurals-cldr');
|
27 |
|
28 | function _class(obj) { return Object.prototype.toString.call(obj); }
|
29 |
|
30 | function isString(obj) { return _class(obj) === '[object String]'; }
|
31 | function isNumber(obj) { return !isNaN(obj) && isFinite(obj); }
|
32 | function isBoolean(obj) { return obj === true || obj === false; }
|
33 | function isFunction(obj) { return _class(obj) === '[object Function]'; }
|
34 | function isObject(obj) { return _class(obj) === '[object Object]'; }
|
35 |
|
36 |
|
37 | var isArray = Array.isArray || function _isArray(obj) {
|
38 | return _class(obj) === '[object Array]';
|
39 | };
|
40 |
|
41 |
|
42 |
|
43 |
|
44 |
|
45 |
|
46 |
|
47 |
|
48 |
|
49 |
|
50 |
|
51 |
|
52 |
|
53 | var nativeForEach = Array.prototype.forEach;
|
54 |
|
55 |
|
56 |
|
57 |
|
58 |
|
59 |
|
60 | function forEach(obj, iterator, context) {
|
61 | if (obj === null) {
|
62 | return;
|
63 | }
|
64 | if (nativeForEach && obj.forEach === nativeForEach) {
|
65 | obj.forEach(iterator, context);
|
66 | } else if (obj.length === +obj.length) {
|
67 | for (var i = 0, l = obj.length; i < l; i += 1) {
|
68 | iterator.call(context, obj[i], i, obj);
|
69 | }
|
70 | } else {
|
71 | for (var key in obj) {
|
72 | if (Object.prototype.hasOwnProperty.call(obj, key)) {
|
73 | iterator.call(context, obj[key], key, obj);
|
74 | }
|
75 | }
|
76 | }
|
77 | }
|
78 |
|
79 |
|
80 | var formatRegExp = /%[sdj%]/g;
|
81 |
|
82 |
|
83 | function format(f) {
|
84 | var i = 1;
|
85 | var args = arguments;
|
86 | var len = args.length;
|
87 | var str = String(f).replace(formatRegExp, function (x) {
|
88 | if (x === '%%') { return '%'; }
|
89 | if (i >= len) { return x; }
|
90 | switch (x) {
|
91 | case '%s':
|
92 | return String(args[i++]);
|
93 | case '%d':
|
94 | return Number(args[i++]);
|
95 | case '%j':
|
96 | return JSON.stringify(args[i++]);
|
97 | default:
|
98 | return x;
|
99 | }
|
100 | });
|
101 | return str;
|
102 | }
|
103 |
|
104 |
|
105 |
|
106 |
|
107 |
|
108 |
|
109 |
|
110 | var GENERIC_LOCALE = 'en';
|
111 |
|
112 |
|
113 |
|
114 |
|
115 |
|
116 |
|
117 |
|
118 |
|
119 |
|
120 |
|
121 |
|
122 |
|
123 |
|
124 |
|
125 |
|
126 |
|
127 | function flatten(obj) {
|
128 | var params = {};
|
129 |
|
130 | forEach(obj || {}, function (val, key) {
|
131 | if (val && typeof val === 'object') {
|
132 | forEach(flatten(val), function (sub_val, sub_key) {
|
133 | params[key + '.' + sub_key] = sub_val;
|
134 | });
|
135 | return;
|
136 | }
|
137 |
|
138 | params[key] = val;
|
139 | });
|
140 |
|
141 | return params;
|
142 | }
|
143 |
|
144 |
|
145 | var keySeparator = '#@$';
|
146 |
|
147 | function makePhraseKey(locale, phrase) {
|
148 | return locale + keySeparator + phrase;
|
149 | }
|
150 |
|
151 |
|
152 | function searchPhraseKey(self, locale, phrase) {
|
153 | var key = makePhraseKey(locale, phrase);
|
154 | var storage = self._storage;
|
155 |
|
156 |
|
157 | if (storage.hasOwnProperty(key)) { return key; }
|
158 |
|
159 |
|
160 | if (locale === self._defaultLocale) { return null; }
|
161 |
|
162 |
|
163 | var fb_cache = self._fallbacks_cache;
|
164 | if (fb_cache.hasOwnProperty(key)) { return fb_cache[key]; }
|
165 |
|
166 |
|
167 | var fb = self._fallbacks[locale] || [ self._defaultLocale ];
|
168 | var fb_key;
|
169 |
|
170 | for (var i = 0, l = fb.length; i < l; i++) {
|
171 | fb_key = makePhraseKey(fb[i], phrase);
|
172 | if (storage.hasOwnProperty(fb_key)) {
|
173 |
|
174 | fb_cache[key] = fb_key;
|
175 | return fb_cache[key];
|
176 | }
|
177 | }
|
178 |
|
179 |
|
180 | fb_cache[key] = null;
|
181 | return null;
|
182 | }
|
183 |
|
184 |
|
185 | function pluralizer(lang, val, forms) {
|
186 | var idx = plural.indexOf(lang, val);
|
187 |
|
188 | if (idx === -1) {
|
189 | return format('[pluralizer for "%s" locale not found]', lang);
|
190 | }
|
191 |
|
192 | if (typeof forms[idx] === 'undefined') {
|
193 | return format(
|
194 | '[plural form %d ("%s") not found in translation]',
|
195 | idx, plural.forms(lang)[idx]
|
196 | );
|
197 | }
|
198 |
|
199 | return forms[idx];
|
200 | }
|
201 |
|
202 |
|
203 |
|
204 |
|
205 |
|
206 |
|
207 |
|
208 |
|
209 |
|
210 |
|
211 |
|
212 |
|
213 |
|
214 | function BabelFish(defaultLocale) {
|
215 | if (!(this instanceof BabelFish)) { return new BabelFish(defaultLocale); }
|
216 |
|
217 | this._defaultLocale = defaultLocale ? String(defaultLocale) : GENERIC_LOCALE;
|
218 |
|
219 |
|
220 | this._fallbacks = {};
|
221 |
|
222 |
|
223 |
|
224 |
|
225 |
|
226 |
|
227 |
|
228 |
|
229 |
|
230 | this._fallbacks_cache = {};
|
231 |
|
232 |
|
233 |
|
234 |
|
235 |
|
236 |
|
237 |
|
238 |
|
239 |
|
240 |
|
241 |
|
242 |
|
243 |
|
244 |
|
245 | this._storage = {};
|
246 |
|
247 |
|
248 |
|
249 |
|
250 |
|
251 |
|
252 |
|
253 | this._plurals_cache = {};
|
254 | }
|
255 |
|
256 |
|
257 |
|
258 |
|
259 |
|
260 |
|
261 |
|
262 |
|
263 |
|
264 |
|
265 |
|
266 |
|
267 |
|
268 |
|
269 |
|
270 |
|
271 |
|
272 |
|
273 |
|
274 |
|
275 |
|
276 |
|
277 |
|
278 |
|
279 |
|
280 |
|
281 |
|
282 |
|
283 |
|
284 |
|
285 |
|
286 |
|
287 |
|
288 |
|
289 |
|
290 |
|
291 |
|
292 |
|
293 |
|
294 |
|
295 |
|
296 |
|
297 |
|
298 | BabelFish.prototype.addPhrase = function _addPhrase(locale, phrase, translation, flattenLevel) {
|
299 | var self = this, fl;
|
300 |
|
301 |
|
302 | if (isBoolean(flattenLevel)) {
|
303 | fl = flattenLevel ? Infinity : 0;
|
304 | } else if (isNumber(flattenLevel)) {
|
305 | fl = Math.floor(flattenLevel);
|
306 | if (fl < 0) {
|
307 | throw new TypeError('Invalid flatten level (should be >= 0).');
|
308 | }
|
309 | } else {
|
310 | fl = Infinity;
|
311 | }
|
312 |
|
313 | if (isObject(translation) && (fl > 0)) {
|
314 |
|
315 | forEach(translation, function (val, key) {
|
316 | self.addPhrase(locale, (phrase ? phrase + '.' : '') + key, val, fl - 1);
|
317 | });
|
318 | return this;
|
319 | }
|
320 |
|
321 | if (isString(translation)) {
|
322 | this._storage[makePhraseKey(locale, phrase)] = {
|
323 | translation: translation,
|
324 | locale: locale,
|
325 | raw: false
|
326 | };
|
327 | } else if (isArray(translation) ||
|
328 | isNumber(translation) ||
|
329 | isBoolean(translation) ||
|
330 | (fl === 0 && isObject(translation))) {
|
331 |
|
332 |
|
333 | this._storage[makePhraseKey(locale, phrase)] = {
|
334 | translation: translation,
|
335 | locale: locale,
|
336 | raw: true
|
337 | };
|
338 | } else {
|
339 |
|
340 |
|
341 |
|
342 |
|
343 | throw new TypeError('Invalid translation - [String|Object|Array|Number|Boolean] expected.');
|
344 | }
|
345 |
|
346 | self._fallbacks_cache = {};
|
347 |
|
348 | return this;
|
349 | };
|
350 |
|
351 |
|
352 |
|
353 |
|
354 |
|
355 |
|
356 |
|
357 |
|
358 |
|
359 |
|
360 |
|
361 |
|
362 |
|
363 |
|
364 |
|
365 |
|
366 |
|
367 |
|
368 |
|
369 |
|
370 |
|
371 |
|
372 |
|
373 |
|
374 | BabelFish.prototype.setFallback = function _setFallback(locale, fallbacks) {
|
375 | var def = this._defaultLocale;
|
376 |
|
377 | if (def === locale) {
|
378 | throw new Error("Default locale can't have fallbacks");
|
379 | }
|
380 |
|
381 | var fb = isArray(fallbacks) ? fallbacks.slice() : [ fallbacks ];
|
382 | if (fb[fb.length - 1] !== def) { fb.push(def); }
|
383 |
|
384 | this._fallbacks[locale] = fb;
|
385 | this._fallbacks_cache = {};
|
386 |
|
387 | return this;
|
388 | };
|
389 |
|
390 |
|
391 | var CAN_HAVE_DIRECTIVES_RE = /#\{|\(\(|\\\\/;
|
392 |
|
393 |
|
394 |
|
395 | function compile(self, str, locale) {
|
396 | var nodes, buf, key, strict_exec, forms_exec, plurals_cache;
|
397 |
|
398 |
|
399 | if (!CAN_HAVE_DIRECTIVES_RE.test(str)) { return str; }
|
400 |
|
401 | nodes = parser.parse(str);
|
402 |
|
403 | if (nodes.length === 1 && nodes[0].type === 'literal') {
|
404 | return nodes[0].text;
|
405 | }
|
406 |
|
407 |
|
408 | if (!self._plurals_cache[locale]) {
|
409 | self._plurals_cache[locale] = new BabelFish(locale);
|
410 | }
|
411 | plurals_cache = self._plurals_cache[locale];
|
412 |
|
413 | buf = [];
|
414 | buf.push([ 'var str = "", strict, strict_exec, forms, forms_exec, plrl, cache, loc, loc_plzr, anchor;' ]);
|
415 | buf.push('params = flatten(params);');
|
416 |
|
417 | forEach(nodes, function (node) {
|
418 | if (node.type === 'literal') {
|
419 | buf.push(format('str += %j;', node.text));
|
420 | return;
|
421 | }
|
422 |
|
423 | if (node.type === 'variable') {
|
424 | key = node.anchor;
|
425 | buf.push(format(
|
426 | 'str += ("undefined" === typeof (params[%j])) ? "[missed variable: %s]" : params[%j];',
|
427 | key, key, key
|
428 | ));
|
429 | return;
|
430 | }
|
431 |
|
432 |
|
433 |
|
434 | if (node.type !== 'plural') { throw new Error('Unknown node type'); }
|
435 |
|
436 |
|
437 |
|
438 |
|
439 |
|
440 | key = node.anchor;
|
441 |
|
442 |
|
443 |
|
444 | strict_exec = {};
|
445 | forEach(node.strict, function (text, k) {
|
446 | var parsed = parser.parse(text);
|
447 | if (parsed.length === 1 && parsed[0].type === 'literal') {
|
448 | strict_exec[k] = false;
|
449 |
|
450 | node.strict[k] = parsed[0].text;
|
451 | return;
|
452 | }
|
453 |
|
454 | strict_exec[k] = true;
|
455 | if (!plurals_cache.hasPhrase(locale, text, true)) {
|
456 | plurals_cache.addPhrase(locale, text, text);
|
457 | }
|
458 | });
|
459 |
|
460 | forms_exec = {};
|
461 | forEach(node.forms, function (text, idx) {
|
462 | var parsed = parser.parse(text), unescaped;
|
463 | if (parsed.length === 1 && parsed[0].type === 'literal') {
|
464 |
|
465 | unescaped = parsed[0].text;
|
466 | node.forms[idx] = unescaped;
|
467 | forms_exec[unescaped] = false;
|
468 | return;
|
469 | }
|
470 |
|
471 | forms_exec[text] = true;
|
472 | if (!plurals_cache.hasPhrase(locale, text, true)) {
|
473 | plurals_cache.addPhrase(locale, text, text);
|
474 | }
|
475 | });
|
476 |
|
477 | buf.push(format('loc = %j;', locale));
|
478 | buf.push(format('loc_plzr = %j;', locale.split(/[-_]/)[0]));
|
479 | buf.push(format('anchor = params[%j];', key));
|
480 | buf.push(format('cache = this._plurals_cache[loc];'));
|
481 | buf.push(format('strict = %j;', node.strict));
|
482 | buf.push(format('strict_exec = %j;', strict_exec));
|
483 | buf.push(format('forms = %j;', node.forms));
|
484 | buf.push(format('forms_exec = %j;', forms_exec));
|
485 | buf.push( 'if (+(anchor) != anchor) {');
|
486 | buf.push(format(' str += "[invalid plurals amount: %s(" + anchor + ")]";', key));
|
487 | buf.push( '} else {');
|
488 | buf.push( ' if (strict[anchor] !== undefined) {');
|
489 | buf.push( ' plrl = strict[anchor];');
|
490 | buf.push( ' str += strict_exec[anchor] ? cache.t(loc, plrl, params) : plrl;');
|
491 | buf.push( ' } else {');
|
492 | buf.push( ' plrl = pluralizer(loc_plzr, +anchor, forms);');
|
493 | buf.push( ' str += forms_exec[plrl] ? cache.t(loc, plrl, params) : plrl;');
|
494 | buf.push( ' }');
|
495 | buf.push( '}');
|
496 | return;
|
497 | });
|
498 |
|
499 | buf.push('return str;');
|
500 |
|
501 |
|
502 | return new Function('params', 'flatten', 'pluralizer', buf.join('\n'));
|
503 | }
|
504 |
|
505 |
|
506 |
|
507 |
|
508 |
|
509 |
|
510 |
|
511 |
|
512 |
|
513 |
|
514 |
|
515 |
|
516 |
|
517 |
|
518 |
|
519 |
|
520 |
|
521 |
|
522 |
|
523 |
|
524 |
|
525 |
|
526 |
|
527 |
|
528 |
|
529 |
|
530 |
|
531 | BabelFish.prototype.translate = function _translate(locale, phrase, params) {
|
532 | var key = searchPhraseKey(this, locale, phrase);
|
533 | var data;
|
534 |
|
535 | if (!key) {
|
536 | return locale + ': No translation for [' + phrase + ']';
|
537 | }
|
538 |
|
539 | data = this._storage[key];
|
540 |
|
541 |
|
542 | if (data.raw) { return data.translation; }
|
543 |
|
544 |
|
545 | if (!data.hasOwnProperty('compiled')) {
|
546 |
|
547 |
|
548 | data.compiled = compile(this, data.translation, data.locale);
|
549 | }
|
550 |
|
551 |
|
552 | if (!isFunction(data.compiled)) {
|
553 | return data.compiled;
|
554 | }
|
555 |
|
556 |
|
557 |
|
558 |
|
559 |
|
560 |
|
561 | if (isNumber(params) || isString(params)) {
|
562 | params = { count: params, value: params };
|
563 | }
|
564 |
|
565 | return data.compiled.call(this, params, flatten, pluralizer);
|
566 | };
|
567 |
|
568 |
|
569 |
|
570 |
|
571 |
|
572 |
|
573 |
|
574 |
|
575 |
|
576 |
|
577 | BabelFish.prototype.hasPhrase = function _hasPhrase(locale, phrase, noFallback) {
|
578 | return noFallback ?
|
579 | this._storage.hasOwnProperty(makePhraseKey(locale, phrase))
|
580 | :
|
581 | searchPhraseKey(this, locale, phrase) ? true : false;
|
582 | };
|
583 |
|
584 |
|
585 |
|
586 |
|
587 |
|
588 |
|
589 |
|
590 |
|
591 |
|
592 |
|
593 |
|
594 |
|
595 |
|
596 | BabelFish.prototype.getLocale = function _getLocale(locale, phrase, noFallback) {
|
597 | if (noFallback) {
|
598 | return this._storage.hasOwnProperty(makePhraseKey(locale, phrase)) ? locale : null;
|
599 | }
|
600 |
|
601 | var key = searchPhraseKey(this, locale, phrase);
|
602 |
|
603 | return key ? key.split(keySeparator, 2)[0] : null;
|
604 | };
|
605 |
|
606 |
|
607 |
|
608 |
|
609 |
|
610 | BabelFish.prototype.t = BabelFish.prototype.translate;
|
611 |
|
612 |
|
613 |
|
614 |
|
615 |
|
616 |
|
617 |
|
618 |
|
619 |
|
620 | BabelFish.prototype.stringify = function _stringify(locale) {
|
621 | var self = this;
|
622 |
|
623 |
|
624 | var unique = {};
|
625 |
|
626 | forEach(this._storage, function (val, key) {
|
627 | unique[key.split(keySeparator)[1]] = true;
|
628 | });
|
629 |
|
630 |
|
631 | var result = {};
|
632 |
|
633 | forEach(unique, function (val, key) {
|
634 | var k = searchPhraseKey(self, locale, key);
|
635 |
|
636 |
|
637 | if (!k) { return; }
|
638 |
|
639 | var l = self._storage[k].locale;
|
640 | if (!result[l]) { result[l] = {}; }
|
641 | result[l][key] = self._storage[k].translation;
|
642 | });
|
643 |
|
644 | var out = {
|
645 | fallback: {},
|
646 | locales: result
|
647 | };
|
648 |
|
649 |
|
650 | var fallback = (self._fallbacks[locale] || []).slice(0, -1);
|
651 | if (fallback.length) {
|
652 | out.fallback[locale] = fallback;
|
653 | }
|
654 |
|
655 | return JSON.stringify(out);
|
656 | };
|
657 |
|
658 |
|
659 |
|
660 |
|
661 |
|
662 |
|
663 |
|
664 |
|
665 |
|
666 | BabelFish.prototype.load = function _load(data) {
|
667 | var self = this;
|
668 |
|
669 | if (isString(data)) { data = JSON.parse(data); }
|
670 |
|
671 | forEach(data.locales, function (phrases, locale) {
|
672 | forEach(phrases, function (translation, key) {
|
673 | self.addPhrase(locale, key, translation, 0);
|
674 | });
|
675 | });
|
676 |
|
677 | forEach(data.fallback, function (rule, locale) {
|
678 | self.setFallback(locale, rule);
|
679 | });
|
680 |
|
681 | return this;
|
682 | };
|
683 |
|
684 |
|
685 | module.exports = BabelFish;
|