feat: add pub & sub item for federation chart

packages/backend/src/services/chart/charts/entities/federation.ts

@@ -8,6 +8,7 @@ export const schema = {
 	'stalled': { uniqueIncrement: true, range: 'small' },
 	'sub': { accumulate: true, range: 'small' },
 	'pub': { accumulate: true, range: 'small' },
+	'pubsub': { accumulate: true, range: 'small' },
 } as const;
 
 export const entity = Chart.schemaToEntity(name, schema);

packages/backend/src/services/chart/charts/federation.ts

@@ -20,7 +20,11 @@ export default class FederationChart extends Chart<typeof schema> {
 
 	@autobind
 	protected async tickMinor(): Promise<Partial<KVs<typeof schema>>> {
-		const [sub, pub] = await Promise.all([
+		const pubsubSubQuery = Followings.createQueryBuilder('f')
+			.select('f.followerHost')
+			.where('f.followerHost IS NOT NULL');
+
+		const [sub, pub, pubsub] = await Promise.all([
 			Followings.createQueryBuilder('following')
 				.select('COUNT(DISTINCT following.followeeHost)')
 				.where('following.followeeHost IS NOT NULL')
@@ -31,11 +35,19 @@ export default class FederationChart extends Chart<typeof schema> {
 				.where('following.followerHost IS NOT NULL')
 				.getRawOne()
 				.then(x => parseInt(x.count, 10)),
+			Followings.createQueryBuilder('following')
+				.select('COUNT(DISTINCT following.followeeHost)')
+				.where('following.followeeHost IS NOT NULL')
+				.andWhere(`following.followerHost IN (${ pubsubSubQuery.getQuery() })`)
+				.setParameters(pubsubSubQuery.getParameters())
+				.getRawOne()
+				.then(x => parseInt(x.count, 10)),
 		]);
 
 		return {
 			'sub': sub,
 			'pub': pub,
+			'pubsub': pubsub,
 		};
 	}