ハッシュタグタイムラインを実装

src/server/api/stream/hashtag.ts

@@ -0,0 +1,48 @@
+import * as websocket from 'websocket';
+import Xev from 'xev';
+
+import { IUser } from '../../../models/user';
+import Mute from '../../../models/mute';
+import { pack } from '../../../models/note';
+
+export default async function(
+	request: websocket.request,
+	connection: websocket.connection,
+	subscriber: Xev,
+	user?: IUser
+) {
+	const mute = user ? await Mute.find({ muterId: user._id }) : null;
+	const mutedUserIds = mute ? mute.map(m => m.muteeId.toString()) : [];
+
+	const q: Array<string[]> = JSON.parse((request.resourceURL.query as any).q);
+
+	// Subscribe stream
+	subscriber.on('hashtag', async note => {
+		const matched = q.some(tags => tags.every(tag => note.tags.map((t: string) => t.toLowerCase()).includes(tag.toLowerCase())));
+		if (!matched) return;
+
+		// Renoteなら再pack
+		if (note.renoteId != null) {
+			note.renote = await pack(note.renoteId, user, {
+				detail: true
+			});
+		}
+
+		//#region 流れてきたNoteがミュートしているユーザーが関わるものだったら無視する
+		if (mutedUserIds.indexOf(note.userId) != -1) {
+			return;
+		}
+		if (note.reply != null && mutedUserIds.indexOf(note.reply.userId) != -1) {
+			return;
+		}
+		if (note.renote != null && mutedUserIds.indexOf(note.renote.userId) != -1) {
+			return;
+		}
+		//#endregion
+
+		connection.send(JSON.stringify({
+			type: 'note',
+			body: note
+		}));
+	});
+}