feat: add baidu translation utils

Author: Styx11

client/src/lib/baidu.ts

@@ -0,0 +1,79 @@
+import { URLSearchParams } from 'url';
+import { v4 as uuidv4 } from 'uuid';
+import md5 from 'blueimp-md5';
+import axios from 'axios';
+
+export interface BaiduResponse
+{
+	from: string;
+	to: string;
+	trans_result: Array<{ src: string; dst: string }>;
+	error_code?: number;
+}
+
+/**
+ * this module is used to get baidu translation resource
+ * including sentence translation and the dictionary resource
+ *
+ * @param {string} query - 查询字符串
+ * @param {boolean} [isChinese] - 查询字符串是否为中文
+ * @return {*} string - 请求链接
+ */
+export const getBaiduSource = (query: string, isChinese?: boolean): string =>
+{
+	const q = query.toLocaleLowerCase();
+	const appid = '20191014000341469';
+	const key = '4GEOkedoeuLlSiwypAoD';
+	const baidu = 'http://api.fanyi.baidu.com/api/trans/vip/translate';
+	const from = 'auto';
+	const to = isChinese ? 'en' : 'zh'; // to can't be auto
+	const salt = uuidv4(); // UUID
+	const str = appid + q + salt + key;
+	const dict = '1'
+
+	// 获取 md5 加密后的 sign
+	const sign = md5(str);
+
+	// 构建参数
+	// 这里也会做 URL encode 操作
+	const search = new URLSearchParams({
+		q,
+		from,
+		to,
+		appid,
+		salt,
+		sign,
+		dict,
+	}).toString();
+
+	const source = `${baidu}?${search}`;
+
+	return source;
+};
+
+
+/**
+ * 翻译中文文本，错误将会被抛出
+ *
+ * @param {string} query - 将要翻译的中文文本
+ * @return {*}  {Promise<string[]>} - 翻译结果数组
+ */
+export const getZhTranslation = async (query: string): Promise<string[]> =>
+{
+	if (!query) return []
+
+	const source = getBaiduSource(query, true)
+
+	const result = await axios.get<BaiduResponse>(source)
+
+	const {
+		trans_result,
+		error_code,
+	} = result.data
+
+	if (result.data.error_code) throw new Error('翻译错误码' + error_code)
+
+	console.log('translationResult', result)
+
+	return trans_result.map(r => r.dst)
+}