anylang
Version:
A translator's kit that uses the free APIs of Google Translate, Yandex, Bing, ChatGPT, and other LLMs
95 lines (93 loc) • 15 kB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
import { z } from 'zod';
export const getPrompt = (text, from, to) => {
// use full language name
const langFormatter = new Intl.DisplayNames(['en'], { type: 'language' });
const originLang = from == 'auto' ? 'auto' : langFormatter.of(from);
const targetLang = langFormatter.of(to);
return `You are a text translation service. I will provide an array of texts, and your task is to translate them from language ${originLang} to language ${targetLang}.
If I specify the source language as 'auto', you should automatically detect it and translate it into the target language I set.
The array in your response must be the same length as the one in the request. Do not add any explanations — translate strictly according to the content.
Be careful when creating an array; it must be syntactically correct and do not change quotation marks. Return an array of translated texts while preserving their order.
Here is the JSON array of texts: ${JSON.stringify(text)}`;
};
export class LLMTranslator {
constructor(llm, options) {
var _a, _b, _c, _d, _e, _f, _g;
this.llm = llm;
this.config = {
retryLimit: (_b = (_a = options === null || options === void 0 ? void 0 : options.retryOptions) === null || _a === void 0 ? void 0 : _a.retryLimit) !== null && _b !== void 0 ? _b : 3,
retryTimeout: (_d = (_c = options === null || options === void 0 ? void 0 : options.retryOptions) === null || _c === void 0 ? void 0 : _c.retryTimeout) !== null && _d !== void 0 ? _d : this.llm.getRequestsTimeout(),
maxRetryTimeout: (_e = options === null || options === void 0 ? void 0 : options.retryOptions) === null || _e === void 0 ? void 0 : _e.maxRetryTimeout,
retryBackoffFactor: (_f = options === null || options === void 0 ? void 0 : options.retryOptions) === null || _f === void 0 ? void 0 : _f.retryBackoffFactor,
getPrompt: (_g = options === null || options === void 0 ? void 0 : options.getPrompt) !== null && _g !== void 0 ? _g : getPrompt,
};
}
translate(text, from, to) {
return __awaiter(this, void 0, void 0, function* () {
const translated = yield this.translateBatch([text], from, to);
return translated[0];
});
}
translateBatch(text, from, to) {
return __awaiter(this, void 0, void 0, function* () {
let attempt = 0;
// Retry loop
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
while (true) {
try {
// first request without delay
if (attempt > 0) {
yield this.waitRetryDelay(attempt);
}
const response = yield this.llm.fetch(this.config.getPrompt(text, from, to));
const validateResult = z
.string()
.array()
.length(text.length, {
message: 'The response must be the same length as the requested array',
})
.parse(JSON.parse(response));
return validateResult;
}
catch (error) {
attempt++;
if (attempt >= this.config.retryLimit)
throw error;
}
}
});
}
getLengthLimit() {
return this.llm.getLengthLimit();
}
getRequestsTimeout() {
return this.llm.getRequestsTimeout();
}
checkLimitExceeding(text) {
const plainText = Array.isArray(text) ? text.join('') : text;
const extra = plainText.length - this.getLengthLimit();
return extra > 0 ? extra : 0;
}
/**
* Calculates retry delays: starts with retryTimeout,
* then increases exponentially (retryTimeout * factor^n) up to maxRetryTimeout (default: 4000).
* Default retryBackoffFactor: 1.5
*/
waitRetryDelay(attempt) {
var _a, _b;
const maxTimeout = (_a = this.config.maxRetryTimeout) !== null && _a !== void 0 ? _a : 4000;
const factor = (_b = this.config.retryBackoffFactor) !== null && _b !== void 0 ? _b : 1.5;
const delay = Math.min(maxTimeout, this.config.retryTimeout * Math.pow(factor, (attempt - 1)));
return new Promise((r) => setTimeout(r, delay));
}
}
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'auto' : langFormatter.of(from);\n\tconst targetLang = langFormatter.of(to);\n\n\treturn `You are a text translation service. I will provide an array of texts, and your task is to translate them from language ${originLang} to language ${targetLang}.\nIf I specify the source language as 'auto', you should automatically detect it and translate it into the target language I set.\nThe array in your response must be the same length as the one in the request. Do not add any explanations — translate strictly according to the content. \nBe careful when creating an array; it must be syntactically correct and do not change quotation marks. Return an array of translated texts while preserving their order.\nHere is the JSON array of texts: ${JSON.stringify(text)}`;\n};\n\nexport class LLMTranslator implements TranslatorInstanceMembers {\n\tprivate readonly config;\n\n\tconstructor(\n\t\tprivate readonly llm: LLMFetcher,\n\t\toptions?: {\n\t\t\tgetPrompt?: PromptGenerator;\n\t\t\tretryOptions?: LLMTranslatorRetryOptions;\n\t\t},\n\t) {\n\t\tthis.config = {\n\t\t\tretryLimit: options?.retryOptions?.retryLimit ?? 3,\n\t\t\tretryTimeout:\n\t\t\t\toptions?.retryOptions?.retryTimeout ?? this.llm.getRequestsTimeout(),\n\t\t\tmaxRetryTimeout: options?.retryOptions?.maxRetryTimeout,\n\t\t\tretryBackoffFactor: options?.retryOptions?.retryBackoffFactor,\n\t\t\tgetPrompt: options?.getPrompt ?? getPrompt,\n\t\t};\n\t}\n\n\tpublic async translate(text: string, from: string, to: string) {\n\t\tconst translated = await this.translateBatch([text], from, to);\n\t\treturn translated[0];\n\t}\n\n\tpublic async translateBatch(text: string[], from: string, to: string) {\n\t\tlet attempt = 0;\n\n\t\t// Retry loop\n\t\t// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition\n\t\twhile (true) {\n\t\t\ttry {\n\t\t\t\t// first request without delay\n\t\t\t\tif (attempt > 0) {\n\t\t\t\t\tawait this.waitRetryDelay(attempt);\n\t\t\t\t}\n\n\t\t\t\tconst response = await this.llm.fetch(\n\t\t\t\t\tthis.config.getPrompt(text, from, to),\n\t\t\t\t);\n\n\t\t\t\tconst validateResult = z\n\t\t\t\t\t.string()\n\t\t\t\t\t.array()\n\t\t\t\t\t.length(text.length, {\n\t\t\t\t\t\tmessage:\n\t\t\t\t\t\t\t'The response must be the same length as the requested array',\n\t\t\t\t\t})\n\t\t\t\t\t.parse(JSON.parse(response));\n\n\t\t\t\treturn validateResult;\n\t\t\t} catch (error) {\n\t\t\t\tattempt++;\n\t\t\t\tif (attempt >= this.config.retryLimit) throw error;\n\t\t\t}\n\t\t}\n\t}\n\n\tpublic getLengthLimit() {\n\t\treturn this.llm.getLengthLimit();\n\t}\n\n\tpublic getRequestsTimeout() {\n\t\treturn this.llm.getRequestsTimeout();\n\t}\n\n\tpublic checkLimitExceeding(text: string | string[]) {\n\t\tconst plainText = Array.isArray(text) ? text.join('') : text;\n\t\tconst extra = plainText.length - this.getLengthLimit();\n\t\treturn extra > 0 ? extra : 0;\n\t}\n\n\t/**\n\t * Calculates retry delays: starts with retryTimeout,\n\t * then increases exponentially (retryTimeout * factor^n) up to maxRetryTimeout (default: 4000).\n\t * Default retryBackoffFactor: 1.5\n\t */\n\tprivate waitRetryDelay(attempt: number) {\n\t\tconst maxTimeout = this.config.maxRetryTimeout ?? 4000;\n\t\tconst factor = this.config.retryBackoffFactor ?? 1.5;\n\t\tconst delay = Math.min(\n\t\t\tmaxTimeout,\n\t\t\tthis.config.retryTimeout * factor ** (attempt - 1),\n\t\t);\n\n\t\treturn new Promise((r) => setTimeout(r, delay));\n\t}\n}\n"]}