fix: filter out paid articles (#1659)

fix #1658

lib/routes/leetcode/articles.js

@@ -11,15 +11,21 @@ module.exports = async (ctx) => {
 
     const list = $('a.list-group-item')
         .slice(0, 10)
+        .filter((i, e) => $(e).find('h4.media-heading i').length === 0)
         .map(function() {
             const info = {
                 title: $(this)
                     .find('h4.media-heading')
+                    .text()
+                    .trim(),
+                author: $(this)
+                    .find('.text-500')
                     .text(),
                 link: $(this).attr('href'),
                 date: $(this)
                     .find('p.pull-right.media-date strong')
-                    .text(),
+                    .text()
+                    .trim(),
             };
             return info;
         })
@@ -27,8 +33,6 @@ module.exports = async (ctx) => {
 
     const out = await Promise.all(
         list.map(async (info) => {
-            const title = info.title;
-            const date = info.date;
             const itemUrl = url.resolve(host, info.link);
 
             const cache = await ctx.cache.get(itemUrl);
@@ -47,19 +51,22 @@ module.exports = async (ctx) => {
                     .trim();
 
             const single = {
-                title: title,
+                title: info.title,
+                author: info.author,
                 link: itemUrl,
-                description: description,
-                pubDate: new Date(date).toUTCString(),
+                description,
+                pubDate: new Date(info.date).toUTCString(),
             };
+
             ctx.cache.set(itemUrl, JSON.stringify(single), 24 * 60 * 60);
             return Promise.resolve(single);
         })
     );
 
     ctx.state.data = {
-        title: 'leetcode文章',
-        link: link,
+        title: 'LeetCode Articles',
+        description: 'LeetCode Articles, the only official solutions you will find.',
+        link,
         item: out,
     };
 };