route: add 爱思想 aisixiang.com (#1572)

* route: add 爱思想 aisixiang.com

* route: add 爱思想排行榜

* docs

lib/routes/aisixiang/utils.js

@@ -0,0 +1,46 @@
+const cheerio = require('cheerio');
+const iconv = require('iconv-lite');
+const axios = require('../../utils/axios');
+const date = require('../../utils/date');
+
+const ProcessFeed = async (link) => {
+    const id = link
+        .split('/')
+        .pop()
+        .split('.')[0];
+
+    let response = await axios.get(`http://www.aisixiang.com/data/view_json.php?id=${id}`, {
+        responseType: 'arraybuffer',
+    });
+
+    const description = JSON.parse(iconv.decode(response.data, 'gbk')).content;
+
+    response = await axios.get(`http://www.aisixiang.com${link}`, {
+        responseType: 'arraybuffer',
+    });
+
+    response.data = iconv.decode(response.data, 'gbk');
+
+    const $ = cheerio.load(response.data);
+
+    const title = $('.show_text > h3').text();
+
+    const pubDate = date(
+        $('.show_text > .info')
+            .text()
+            .split('：')
+            .pop(),
+        8
+    );
+
+    return {
+        title: title.split('/')[1] || title,
+        author: title.split('/')[0] || '',
+        description,
+        pubDate,
+    };
+};
+
+module.exports = {
+    ProcessFeed,
+};