Set up initial project and files

src/utils/feed-generator.ts

@@ -0,0 +1,53 @@
+import { Feed } from 'feed';
+import { FeedConfig, EmailData } from '../types';
+
+/**
+ * Generate an RSS feed from a list of emails
+ */
+export function generateRssFeed(
+  feedConfig: FeedConfig, 
+  emails: EmailData[],
+  baseUrl: string
+): string {
+  // Create a new feed
+  const feed = new Feed({
+    title: feedConfig.title,
+    description: feedConfig.description || '',
+    id: feedConfig.feed_url,
+    link: feedConfig.site_url,
+    language: feedConfig.language,
+    updated: new Date(),
+    generator: 'Email-to-RSS',
+    copyright: `Copyright © ${new Date().getFullYear()} ${feedConfig.title}`,
+    feedLinks: {
+      rss: feedConfig.feed_url
+    },
+    author: feedConfig.author ? {
+      name: feedConfig.author,
+      email: `noreply@${new URL(feedConfig.site_url).hostname}`
+    } : undefined
+  });
+
+  // Add each email as a feed item
+  for (const email of emails) {
+    const date = new Date(email.receivedAt);
+    const uniqueId = `${email.receivedAt}-${Buffer.from(email.subject).toString('base64').substring(0, 10)}`;
+    
+    feed.addItem({
+      title: email.subject,
+      id: uniqueId,
+      link: `${baseUrl}/emails/${uniqueId}`,
+      description: email.content,
+      content: email.content,
+      author: [
+        {
+          name: email.from,
+        },
+      ],
+      date: date,
+    });
+  }
+
+  // Return the RSS feed as XML
+  return feed.rss2();
+}