enhance(backend): improve chart engine

2026-05-05 05:26:03 +02:00 · 2021-12-14 18:12:37 +09:00
parent d95fafb5b3
commit 0be4e10462
36 changed files with 604 additions and 248 deletions
--- a/packages/backend/src/services/chart/charts/per-user-following.ts
+++ b/packages/backend/src/services/chart/charts/per-user-following.ts
@@ -0,0 +1,125 @@
+import autobind from 'autobind-decorator';
+import Chart, { Obj, DeepPartial } from '../core';
+import { SchemaType } from '@/misc/schema';
+import { Followings, Users } from '@/models/index';
+import { Not, IsNull } from 'typeorm';
+import { User } from '@/models/entities/user';
+import { name, schema } from './entities/per-user-following';
+
+type PerUserFollowingLog = SchemaType<typeof schema>;
+
+/**
+ * ユーザーごとのフォローに関するチャート
+ */
+// eslint-disable-next-line import/no-default-export
+export default class PerUserFollowingChart extends Chart<PerUserFollowingLog> {
+	constructor() {
+		super(name, schema, true);
+	}
+
+	@autobind
+	protected genNewLog(latest: PerUserFollowingLog): DeepPartial<PerUserFollowingLog> {
+		return {
+			local: {
+				followings: {
+					total: latest.local.followings.total,
+				},
+				followers: {
+					total: latest.local.followers.total,
+				},
+			},
+			remote: {
+				followings: {
+					total: latest.remote.followings.total,
+				},
+				followers: {
+					total: latest.remote.followers.total,
+				},
+			},
+		};
+	}
+
+	@autobind
+	protected aggregate(logs: PerUserFollowingLog[]): PerUserFollowingLog {
+		return {
+			local: {
+				followings: {
+					total: logs[0].local.followings.total,
+					inc: logs.reduce((a, b) => a + b.local.followings.inc, 0),
+					dec: logs.reduce((a, b) => a + b.local.followings.dec, 0),
+				},
+				followers: {
+					total: logs[0].local.followers.total,
+					inc: logs.reduce((a, b) => a + b.local.followers.inc, 0),
+					dec: logs.reduce((a, b) => a + b.local.followers.dec, 0),
+				},
+			},
+			remote: {
+				followings: {
+					total: logs[0].remote.followings.total,
+					inc: logs.reduce((a, b) => a + b.remote.followings.inc, 0),
+					dec: logs.reduce((a, b) => a + b.remote.followings.dec, 0),
+				},
+				followers: {
+					total: logs[0].remote.followers.total,
+					inc: logs.reduce((a, b) => a + b.remote.followers.inc, 0),
+					dec: logs.reduce((a, b) => a + b.remote.followers.dec, 0),
+				},
+			},
+		};
+	}
+
+	@autobind
+	protected async fetchActual(group: string): Promise<DeepPartial<PerUserFollowingLog>> {
+		const [
+			localFollowingsCount,
+			localFollowersCount,
+			remoteFollowingsCount,
+			remoteFollowersCount,
+		] = await Promise.all([
+			Followings.count({ followerId: group, followeeHost: null }),
+			Followings.count({ followeeId: group, followerHost: null }),
+			Followings.count({ followerId: group, followeeHost: Not(IsNull()) }),
+			Followings.count({ followeeId: group, followerHost: Not(IsNull()) }),
+		]);
+
+		return {
+			local: {
+				followings: {
+					total: localFollowingsCount,
+				},
+				followers: {
+					total: localFollowersCount,
+				},
+			},
+			remote: {
+				followings: {
+					total: remoteFollowingsCount,
+				},
+				followers: {
+					total: remoteFollowersCount,
+				},
+			},
+		};
+	}
+
+	@autobind
+	public async update(follower: { id: User['id']; host: User['host']; }, followee: { id: User['id']; host: User['host']; }, isFollow: boolean): Promise<void> {
+		const update: Obj = {};
+
+		update.total = isFollow ? 1 : -1;
+
+		if (isFollow) {
+			update.inc = 1;
+		} else {
+			update.dec = 1;
+		}
+
+		this.inc({
+			[Users.isLocalUser(follower) ? 'local' : 'remote']: { followings: update },
+		}, follower.id);
+		this.inc({
+			[Users.isLocalUser(followee) ? 'local' : 'remote']: { followers: update },
+		}, followee.id);
+	}
+}