Feed (#3698)

* wip

* Implement feed

* Update feed.ts

* Update index.ts

* Update feed.ts

src/server/web/feed.ts

@@ -0,0 +1,54 @@
+import { Feed } from 'feed';
+import config from '../../config';
+import Note from '../../models/note';
+import { IUser } from '../../models/user';
+import { getOriginalUrl } from '../../misc/get-drive-file-url';
+
+export default async function(user: IUser) {
+	const author: Author = {
+		link: `${config.url}/@${user.username}`,
+		name: user.name || user.username
+	};
+
+	const notes = await Note.find({
+		userId: user._id,
+		renoteId: null,
+		$or: [
+			{ visibility: 'public' },
+			{ visibility: 'home' }
+		]
+	}, {
+		sort: { createdAt: -1 },
+		limit: 20
+	});
+
+	const feed = new Feed({
+		id: author.link,
+		title: `${author.name} (@${user.username}@${config.host})`,
+		updated: notes[0].createdAt,
+		generator: 'Misskey',
+		description: `${user.notesCount} Notes, ${user.followingCount} Following, ${user.followersCount} Followers${user.description ? ` · ${user.description}` : ''}`,
+		link: author.link,
+		image: user.avatarUrl,
+		feedLinks: {
+			json: `${author.link}.json`,
+			atom: `${author.link}.atom`,
+		},
+		author
+	} as FeedOptions);
+
+	for (const note of notes) {
+		const file = note._files && note._files.find(file => file.contentType.startsWith('image/'));
+
+		feed.addItem({
+			title: `New note by ${author.name}`,
+			link: `${config.url}/notes/${note._id}`,
+			date: note.createdAt,
+			description: note.cw,
+			content: note.text,
+			image: file && getOriginalUrl(file)
+		});
+	}
+
+	return feed;
+}