fix: transform markdown to html for rss (#82)

* docs: switch English version as main CONTRIBUTING doc

* feat: add rss support

* docs: add rss doc

* fix: add missing /sub routing

* fix: add RSSService to App

* feat: Add support for remark-gfm and rehype-stringify in RSSService

* fix: remove async in foreach

server/package.json

@@ -34,6 +34,11 @@
     "elysia-oauth2": "^1.2.0",
     "feed": "^4.2.2",
     "jose": "^5.3.0",
+    "rehype-stringify": "^10.0.0",
+    "remark-gfm": "^4.0.0",
+    "remark-parse": "^11.0.0",
+    "remark-rehype": "^11.1.0",
+    "unified": "^11.0.4",
     "url": "^0.11.3"
   },
   "trustedDependencies": [

server/src/services/rss.ts

@@ -9,6 +9,11 @@ import * as schema from "../db/schema";
 import { feeds, users } from "../db/schema";
 import { extractImage } from "../utils/image";
 import { createS3Client } from "../utils/s3";
+import remarkGfm from "remark-gfm";
+import { unified } from "unified";
+import remarkParse from "remark-parse";
+import remarkRehype from "remark-rehype";
+import rehypeStringify from "rehype-stringify";
 
 export const RSSService = (env: Env) => {
     const endpoint = env.S3_ENDPOINT;
@@ -78,18 +83,26 @@ export async function rssCrontab(env: Env) {
             }
         }
     });
-    feed_list.forEach(({ summary, content, user, ...other }) => {
+    for(const f of feed_list) {
+        const { summary, content, user, ...other } = f;
+        const file = await unified()
+            .use(remarkParse)
+            .use(remarkGfm)
+            .use(remarkRehype)
+            .use(rehypeStringify)
+            .process(content)
+        let contentHtml = file.toString()
         feed.addItem({
             title: other.title || "No title",
             id: other.id?.toString() || "0",
             link: `${frontendUrl}/feed/${other.id}`,
             date: other.createdAt,
             description: summary.length > 0 ? summary : content.length > 100 ? content.slice(0, 100) : content,
-            content: content,
+            content: contentHtml,
             author: [{ name: user.username }],
             image: extractImage(content) || user.avatar as string,
         });
-    });
+    }
     // save rss.xml to s3
     console.log('save rss.xml to s3');
     const bucket = env.S3_BUCKET;