Enhancement: FT 中文网支持繁体输出 (#995)

目前有两个待确定的问题：
- `channel` 参数是可选的，如果后面跟上的`site` 也是可选的会影响到前面的逻辑，所以暂时先用`query`参数(`?site=big5`)代替了。全局搜了下发现`query`参数好像只在中间件里用到，有些担心会冲突或者破坏一些先前约定什么的，这里需要请教下看看有啥更好的参数设计方案不
- 测试的时候网络有点小坑，没能完全测试完，方便的话麻烦看下繁体输出的会不会有问题

以上

docs/README.md

@@ -1534,7 +1534,7 @@ Category 列表:
 
 ### FT 中文网
 
-<route name="FT 中文网" author="HenryQW" example="/ft/chinese/hotstoryby7day" path="/ft/chinese/:channel?" :paramsDesc="['频道, 缺省为每日更新']">
+<route name="FT 中文网" author="HenryQW xyqfer" example="/ft/chinese/hotstoryby7day" path="/ft/:language/:channel?" :paramsDesc="['语言，简体`chinese`，繁体`traditional`', '频道, 缺省为每日更新']">
 
 ::: tip 提示
 

router.js

@@ -660,7 +660,7 @@ router.get('/nhk/news_web_easy', require('./routes/nhk/news_web_easy'));
 router.get('/bbc/:channel?', require('./routes/bbc/index'));
 
 // FT 中文网
-router.get('/ft/chinese/:channel?', require('./routes/ft/chinese'));
+router.get('/ft/:language/:channel?', require('./routes/ft/channel'));
 
 // The Verge
 router.get('/verge', require('./routes/verge/index'));

routes/ft/channel.js

@@ -0,0 +1,8 @@
+const utils = require('./utils');
+
+module.exports = async (ctx) => {
+    ctx.state.data = await utils.getData({
+        site: ctx.params.language === 'chinese' ? 'www' : 'big5',
+        channel: ctx.params.channel,
+    });
+};

routes/ft/utils.js

@@ -1,4 +1,9 @@
+const axios = require('../../utils/axios');
+const cheerio = require('cheerio');
+const Parser = require('rss-parser');
+
 const ProcessFeed = ($, link) => {
+    const title = $('h1').text();
     let content = $('div.story-container');
 
     // 处理封面图片
@@ -27,9 +32,57 @@ const ProcessFeed = ($, link) => {
     });
     content = content.html();
 
-    return { content, author };
+    return { content, author, title };
+};
+
+const getData = async ({ site = 'www', channel }) => {
+    const parser = new Parser();
+    let feed;
+
+    if (channel) {
+        let channel = channel.toLowerCase();
+        channel = channel.split('-').join('/');
+
+        try {
+            feed = await parser.parseURL(`http://${site}.ftchinese.com/rss/${channel}`);
+        } catch (error) {
+            return {
+                title: `FT 中文网 ${channel} 不存在`,
+                description: `FT 中文网 ${channel} 不存在`,
+            };
+        }
+    } else {
+        feed = await parser.parseURL(`http://${site}.ftchinese.com/rss/feed`);
+    }
+
+    const items = await Promise.all(
+        feed.items.splice(0, 10).map(async (item) => {
+            const response = await axios({
+                method: 'get',
+                url: `${item.link}?full=y&archive`,
+            });
+
+            const $ = cheerio.load(response.data);
+            const result = ProcessFeed($, item.link);
+            const single = {
+                title: result.title,
+                description: result.content,
+                author: result.author,
+                pubDate: item.pubDate,
+                link: item.link,
+            };
+            return Promise.resolve(single);
+        })
+    );
+
+    return {
+        title: feed.title,
+        link: feed.link,
+        description: feed.description,
+        item: items,
+    };
 };
 
 module.exports = {
-    ProcessFeed,
+    getData,
 };