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https://github.com/LibreTranslate/LibreTranslate.git
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Merge pull request #630 from pierotofy/alternatives
Support for alternative translations
This commit is contained in:
Piero Toffanin
GitHub
commit
76721891b4
@ -148,6 +148,10 @@ def get_routes_limits(args, api_keys_db):
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return res
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def unique_list(seq):
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seen = set()
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seen_add = seen.add
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return [x for x in seq if not (x in seen or seen_add(x))]
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def create_app(args):
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from libretranslate.init import boot
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@ -496,6 +500,14 @@ def create_app(args):
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Format of source text:
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* `text` - Plain text
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* `html` - HTML markup
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- in: formData
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name: alternatives
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schema:
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type: integer
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default: 0
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example: 3
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required: false
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description: Preferred number of alternative translations
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- in: formData
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name: api_key
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schema:
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@ -558,11 +570,13 @@ def create_app(args):
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source_lang = json.get("source")
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target_lang = json.get("target")
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text_format = json.get("format")
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num_alternatives = int(json.get("alternatives", 0))
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else:
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q = request.values.get("q")
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source_lang = request.values.get("source")
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target_lang = request.values.get("target")
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text_format = request.values.get("format")
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num_alternatives = request.values.get("alternatives", 0)
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if not q:
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abort(400, description=_("Invalid request: missing %(name)s parameter", name='q'))
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@ -571,6 +585,14 @@ def create_app(args):
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if not target_lang:
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abort(400, description=_("Invalid request: missing %(name)s parameter", name='target'))
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try:
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num_alternatives = max(0, int(num_alternatives))
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except ValueError:
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abort(400, description=_("Invalid request: %(name)s parameter is not a number", name='alternatives'))
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if args.alternatives_limit != -1 and num_alternatives > args.alternatives_limit:
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abort(400, description=_("Invalid request: %(name)s parameter must be <= %(value)s", name='alternatives', value=args.alternatives_limit))
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if not request.is_json:
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# Normalize line endings to UNIX style (LF) only so we can consistently
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# enforce character limits.
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@ -626,54 +648,53 @@ def create_app(args):
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try:
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if batch:
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results = []
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batch_results = []
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batch_alternatives = []
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for text in q:
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translator = src_lang.get_translation(tgt_lang)
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if translator is None:
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abort(400, description=_("%(tname)s (%(tcode)s) is not available as a target language from %(sname)s (%(scode)s)", tname=_lazy(tgt_lang.name), tcode=tgt_lang.code, sname=_lazy(src_lang.name), scode=src_lang.code))
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if text_format == "html":
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translated_text = str(translate_html(translator, text))
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translated_text = unescape(str(translate_html(translator, text)))
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alternatives = [] # Not supported for html yet
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else:
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translated_text = improve_translation_formatting(text, translator.translate(text))
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hypotheses = translator.hypotheses(text, num_alternatives + 1)
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translated_text = unescape(improve_translation_formatting(text, hypotheses[0].value))
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alternatives = unique_list([unescape(improve_translation_formatting(text, hypotheses[i].value)) for i in range(1, len(hypotheses))])
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batch_results.append(translated_text)
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batch_alternatives.append(alternatives)
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result = {"translatedText": batch_results}
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results.append(unescape(translated_text))
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if source_lang == "auto":
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return jsonify(
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{
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"translatedText": results,
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"detectedLanguage": [detected_src_lang] * len(q)
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}
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)
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else:
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return jsonify(
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{
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"translatedText": results
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}
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)
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result["detectedLanguage"] = [detected_src_lang] * len(q)
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if num_alternatives > 0:
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result["alternatives"] = batch_alternatives
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return jsonify(result)
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else:
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translator = src_lang.get_translation(tgt_lang)
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if translator is None:
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abort(400, description=_("%(tname)s (%(tcode)s) is not available as a target language from %(sname)s (%(scode)s)", tname=_lazy(tgt_lang.name), tcode=tgt_lang.code, sname=_lazy(src_lang.name), scode=src_lang.code))
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if text_format == "html":
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translated_text = str(translate_html(translator, q))
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translated_text = unescape(str(translate_html(translator, q)))
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alternatives = [] # Not supported for html yet
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else:
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translated_text = improve_translation_formatting(q, translator.translate(q))
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hypotheses = translator.hypotheses(q, num_alternatives + 1)
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translated_text = unescape(improve_translation_formatting(q, hypotheses[0].value))
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alternatives = unique_list([unescape(improve_translation_formatting(q, hypotheses[i].value)) for i in range(1, len(hypotheses))])
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result = {"translatedText": translated_text}
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if source_lang == "auto":
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return jsonify(
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{
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"translatedText": unescape(translated_text),
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"detectedLanguage": detected_src_lang
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}
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)
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else:
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return jsonify(
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{
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"translatedText": unescape(translated_text)
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}
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)
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result["detectedLanguage"] = detected_src_lang
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if num_alternatives > 0:
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result["alternatives"] = alternatives
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return jsonify(result)
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except Exception as e:
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raise e
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abort(500, description=_("Cannot translate text: %(text)s", text=str(e)))
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@ -161,6 +161,11 @@ _default_options_objects = [
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'default_value': None,
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'value_type': 'str'
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},
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{
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'name': 'ALTERNATIVES_LIMIT',
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'default_value': -1,
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'value_type': 'int'
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},
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{
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'name': 'THREADS',
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'default_value': 4,
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@ -161,6 +161,13 @@ def get_args():
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metavar="<comma-separated language codes>",
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help="Set available languages (ar,de,en,es,fr,ga,hi,it,ja,ko,pt,ru,zh)",
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)
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parser.add_argument(
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"--alternatives-limit",
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default=DEFARGS['ALTERNATIVES_LIMIT'],
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type=int,
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metavar="<maximum number of alternatives translations>",
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help="Set the maximum number of supported alternative translations (%(default)s)",
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)
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parser.add_argument(
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"--threads",
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default=DEFARGS['THREADS'],
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@ -134,6 +134,7 @@ document.addEventListener('DOMContentLoaded', function(){
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' source: ' + this.$options.filters.escape(this.sourceLang) + ',',
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' target: ' + this.$options.filters.escape(this.targetLang) + ',',
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' format: "' + (this.isHtml ? "html" : "text") + '",',
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' alternatives: 3,',
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' api_key: "' + (localStorage.getItem("api_key") || "") + '"',
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' }),',
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' headers: { "Content-Type": "application/json" }',
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@ -241,6 +242,7 @@ document.addEventListener('DOMContentLoaded', function(){
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data.append("source", self.sourceLang);
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data.append("target", self.targetLang);
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data.append("format", self.isHtml ? "html" : "text");
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data.append("alternatives", 3);
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data.append("api_key", localStorage.getItem("api_key") || "");
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if (self.apiSecret) data.append("secret", self.apiSecret);
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