add 牛客网讨论区 (#1539)

docs/README.md

@@ -816,6 +816,16 @@ GitHub 官方也提供了一些 RSS:
 
 <route name="Patch Comments" author="ysc3839" example="/patchwork.kernel.org/comments/10723629" path="/patchwork.kernel.org/comments/:id" :paramsDesc="['Patch ID']"/>
 
+### 牛客网
+
+<route name="讨论区" author="LogicJake" example="/nowcoder/discuss/2/4" path="/nowcoder/discuss/:type/:order" :paramsDesc="['讨论区分区id 在 URL 中可以找到', '排序方式']">
+
+| 最新回复 | 最新发表 | 最新 | 精华 |
+| -------- | -------- | ---- | ---- |
+| 0        | 3        | 1    | 4    |
+
+</router>
+
 ## 直播
 
 ### 哔哩哔哩直播

lib/router.js

@@ -1037,4 +1037,7 @@ router.get('/gaoqing/latest', require('./routes/gaoqing/latest'));
 // 轻小说文库
 router.get('/wenku8/chapter/:id', require('./routes/wenku8/chapter'));
 
+// 牛客网
+router.get('/nowcoder/discuss/:type/:order', require('./routes/nowcoder/discuss'));
+
 module.exports = router;

lib/routes/nowcoder/discuss.js

@@ -0,0 +1,72 @@
+const axios = require('../../utils/axios');
+const cheerio = require('cheerio');
+const url = require('url');
+const date = require('../../utils/date');
+
+const host = 'https://www.nowcoder.com';
+
+module.exports = async (ctx) => {
+    const type = ctx.params.type;
+    const order = ctx.params.order;
+
+    const link = `https://www.nowcoder.com/discuss?type=${type}&order=${order}`;
+    const response = await axios.get(link);
+    const $ = cheerio.load(response.data);
+
+    const type_name = $('a.discuss-tab.selected').text();
+    const order_name = $('li.selected a').text();
+
+    const list = $('li.clearfix')
+        .map(function() {
+            const info = {
+                title: $(this)
+                    .find('div.discuss-main.clearfix a')
+                    .text()
+                    .trim()
+                    .replace('\n', ' '),
+                link: $(this)
+                    .find('div.discuss-main.clearfix a')
+                    .attr('href'),
+            };
+            return info;
+        })
+        .get();
+
+    const out = await Promise.all(
+        list.map(async (info) => {
+            const title = info.title || 'tzgg';
+            const itemUrl = url.resolve(host, info.link);
+
+            const cache = await ctx.cache.get(itemUrl);
+            if (cache) {
+                return Promise.resolve(JSON.parse(cache));
+            }
+
+            const response = await axios.get(itemUrl);
+            const $ = cheerio.load(response.data);
+
+            const date_value = $('span.post-time')
+                .text()
+                .split('  ')[1];
+
+            const description = $('.post-topic-main')
+                .html()
+                .trim();
+
+            const single = {
+                title: title,
+                link: itemUrl,
+                description: description,
+                pubDate: date(date_value, 8),
+            };
+            ctx.cache.set(itemUrl, JSON.stringify(single), 24 * 60 * 60);
+            return Promise.resolve(single);
+        })
+    );
+
+    ctx.state.data = {
+        title: `${type_name}${order_name}——牛客网讨论区`,
+        link: link,
+        item: out,
+    };
+};