增加: NGA (#1162)

#89

docs/README.md

@@ -557,6 +557,10 @@ RSSHub 提供下列 API 接口:
 
 </route>
 
+### NGA
+
+<route name="论坛" author="xyqfer" example="/nga/forum/485" path="/nga/forum/:fid"  :paramsDesc="['分区 id, 可在分区主页 URL 找到']"/>
+
 ## 编程
 
 ### 掘金

router.js

@@ -833,4 +833,7 @@ router.get('/testerhome/newest', require('./routes/testerhome/newest'));
 router.get('/weseepro/newest', require('./routes/weseepro/newest'));
 router.get('/weseepro/circle', require('./routes/weseepro/circle'));
 
+// NGA
+router.get('/nga/forum/:fid', require('./routes/nga/forum'));
+
 module.exports = router;

routes/nga/forum.js

@@ -0,0 +1,60 @@
+const axios = require('../../utils/axios');
+const qs = require('querystring');
+
+module.exports = async (ctx) => {
+    const { fid } = ctx.params;
+    const axiosInstance = axios.create({
+        baseURL: 'https://ngabbs.com/app_api.php',
+        headers: {
+            'Content-Type': 'application/x-www-form-urlencoded',
+            'X-User-Agent': 'NGA_skull/6.0.5(iPhone10,3;iOS 12.0.1)',
+        },
+    });
+    const homePage = await axiosInstance.request({
+        method: 'post',
+        url: '?__lib=subject&__act=list',
+        data: qs.stringify({
+            fid,
+        }),
+    });
+
+    const list = homePage.data.result.data.filter(({ tid }) => tid);
+
+    const resultItem = await Promise.all(
+        list.map(async ({ subject, postdate, tid }) => {
+            const link = `https://nga.178.com/read.php?tid=${tid}`;
+            const item = {
+                title: subject,
+                description: '',
+                link,
+                pubDate: new Date(postdate * 1000).toUTCString(),
+            };
+
+            const description = await ctx.cache.tryGet(
+                `nga-forum: ${link}`,
+                async () => {
+                    const response = await axiosInstance.request({
+                        method: 'post',
+                        url: '?__lib=post&__act=list',
+                        data: qs.stringify({
+                            tid,
+                        }),
+                    });
+
+                    return response.data.result[0].content;
+                },
+                24 * 60 * 60
+            );
+
+            item.description = description;
+            return Promise.resolve(item);
+        })
+    );
+
+    ctx.state.data = {
+        title: `NGA-${fid}`,
+        link: `https://nga.178.com/thread.php?fid=${fid}`,
+        description: 'NGA是国内专业的游戏玩家社区,魔兽世界,英雄联盟,炉石传说,风暴英雄,暗黑破坏神3(D3)游戏攻略讨论,以及其他热门游戏玩家社区',
+        item: resultItem,
+    };
+};