Implement #2980

3 files changed, 87 insertions, 0 deletions

diff --git a/src/server/api/endpoints/charts/user/reactions.ts b/src/server/api/endpoints/charts/user/reactions.ts
new file mode 100644
index 0000000000..1d1e7d5a44
--- /dev/null
+++ b/src/server/api/endpoints/charts/user/reactions.ts
@@ -0,0 +1,41 @@
+import $ from 'cafy';
+import getParams from '../../../get-params';
+import { perUserReactionsStats } from '../../../../../services/stats';
+import ID from '../../../../../misc/cafy-id';
+
+export const meta = {
+	desc: {
+		'ja-JP': 'ユーザーごとの被リアクション数の統計を取得します。'
+	},
+
+	params: {
+		span: $.str.or(['day', 'hour']).note({
+			desc: {
+				'ja-JP': '集計のスパン (day または hour)'
+			}
+		}),
+
+		limit: $.num.optional.range(1, 100).note({
+			default: 30,
+			desc: {
+				'ja-JP': '最大数。例えば 30 を指定したとすると、スパンが"day"の場合は30日分のデータが、スパンが"hour"の場合は30時間分のデータが返ります。'
+			}
+		}),
+
+		userId: $.type(ID).note({
+			desc: {
+				'ja-JP': '対象のユーザーのID',
+				'en-US': 'Target user ID'
+			}
+		})
+	}
+};
+
+export default (params: any) => new Promise(async (res, rej) => {
+	const [ps, psErr] = getParams(meta, params);
+	if (psErr) throw psErr;
+
+	const stats = await perUserReactionsStats.getChart(ps.span as any, ps.limit, ps.userId);
+
+	res(stats);
+});
diff --git a/src/services/note/reaction/create.ts b/src/services/note/reaction/create.ts
index 8fa0b52e7d..13bb44ff3b 100644
--- a/src/services/note/reaction/create.ts
+++ b/src/services/note/reaction/create.ts
@@ -8,6 +8,7 @@ import watch from '../watch';
 import renderLike from '../../../remote/activitypub/renderer/like';
 import { deliver } from '../../../queue';
 import pack from '../../../remote/activitypub/renderer';
+import { perUserReactionsStats } from '../../stats';
 
 export default async (user: IUser, note: INote, reaction: string) => new Promise(async (res, rej) => {
 	// Myself
@@ -43,6 +44,8 @@ export default async (user: IUser, note: INote, reaction: string) => new Promise
 		$inc: inc
 	});
 
+	perUserReactionsStats.update(user, note);
+
 	publishNoteStream(note._id, 'reacted', {
 		reaction: reaction,
 		userId: user._id
diff --git a/src/services/stats.ts b/src/services/stats.ts
index 086420bb4b..a7b584f4dd 100644
--- a/src/services/stats.ts
+++ b/src/services/stats.ts
@@ -912,6 +912,49 @@ class PerUserNotesStats extends Stats<PerUserNotesLog> {
 export const perUserNotesStats = new PerUserNotesStats();
 //#endregion
 
+//#region Per user reactions stats
+/**
+ * ユーザーごとのリアクションに関する統計
+ */
+type PerUserReactionsLog = {
+	local: {
+		/**
+		 * リアクションされた数
+		 */
+		count: number;
+	};
+
+	remote: PerUserReactionsLog['local'];
+};
+
+class PerUserReactionsStats extends Stats<PerUserReactionsLog> {
+	constructor() {
+		super('perUserReaction', true);
+	}
+
+	@autobind
+	protected async getTemplate(init: boolean, latest?: PerUserReactionsLog, group?: any): Promise<PerUserReactionsLog> {
+		return {
+			local: {
+				count: 0
+			},
+			remote: {
+				count: 0
+			}
+		};
+	}
+
+	@autobind
+	public async update(user: IUser, note: INote) {
+		this.inc({
+			[isLocalUser(user) ? 'local' : 'remote']: { count: 1 }
+		}, note.userId);
+	}
+}
+
+export const perUserReactionsStats = new PerUserReactionsStats();
+//#endregion
+
 //#region Per user drive stats
 /**
  * ユーザーごとのドライブに関する統計