1 files changed, 135 insertions, 0 deletions
diff --git a/packages/backend/src/services/note/reaction/create.ts b/packages/backend/src/services/note/reaction/create.ts
new file mode 100644
index 0000000000..308bd4dff7
--- /dev/null
+++ b/packages/backend/src/services/note/reaction/create.ts
@@ -0,0 +1,135 @@
+import { publishNoteStream } from '@/services/stream';
+import { renderLike } from '@/remote/activitypub/renderer/like';
+import DeliverManager from '@/remote/activitypub/deliver-manager';
+import { renderActivity } from '@/remote/activitypub/renderer/index';
+import { toDbReaction, decodeReaction } from '@/misc/reaction-lib';
+import { User, IRemoteUser } from '@/models/entities/user';
+import { Note } from '@/models/entities/note';
+import { NoteReactions, Users, NoteWatchings, Notes, Emojis, Blockings } from '@/models/index';
+import { Not } from 'typeorm';
+import { perUserReactionsChart } from '@/services/chart/index';
+import { genId } from '@/misc/gen-id';
+import { createNotification } from '../../create-notification';
+import deleteReaction from './delete';
+import { isDuplicateKeyValueError } from '@/misc/is-duplicate-key-value-error';
+import { NoteReaction } from '@/models/entities/note-reaction';
+import { IdentifiableError } from '@/misc/identifiable-error';
+
+export default async (user: { id: User['id']; host: User['host']; }, note: Note, reaction?: string) => {
+	// Check blocking
+	if (note.userId !== user.id) {
+		const block = await Blockings.findOne({
+			blockerId: note.userId,
+			blockeeId: user.id,
+		});
+		if (block) {
+			throw new IdentifiableError('e70412a4-7197-4726-8e74-f3e0deb92aa7');
+		}
+	}
+
+	// TODO: cache
+	reaction = await toDbReaction(reaction, user.host);
+
+	const record: NoteReaction = {
+		id: genId(),
+		createdAt: new Date(),
+		noteId: note.id,
+		userId: user.id,
+		reaction
+	};
+
+	// Create reaction
+	try {
+		await NoteReactions.insert(record);
+	} catch (e) {
+		if (isDuplicateKeyValueError(e)) {
+			const exists = await NoteReactions.findOneOrFail({
+				noteId: note.id,
+				userId: user.id,
+			});
+
+			if (exists.reaction !== reaction) {
+				// 別のリアクションがすでにされていたら置き換える
+				await deleteReaction(user, note);
+				await NoteReactions.insert(record);
+			} else {
+				// 同じリアクションがすでにされていたらエラー
+				throw new IdentifiableError('51c42bb4-931a-456b-bff7-e5a8a70dd298');
+			}
+		} else {
+			throw e;
+		}
+	}
+
+	// Increment reactions count
+	const sql = `jsonb_set("reactions", '{${reaction}}', (COALESCE("reactions"->>'${reaction}', '0')::int + 1)::text::jsonb)`;
+	await Notes.createQueryBuilder().update()
+		.set({
+			reactions: () => sql,
+			score: () => '"score" + 1'
+		})
+		.where('id = :id', { id: note.id })
+		.execute();
+
+	perUserReactionsChart.update(user, note);
+
+	// カスタム絵文字リアクションだったら絵文字情報も送る
+	const decodedReaction = decodeReaction(reaction);
+
+	let emoji = await Emojis.findOne({
+		where: {
+			name: decodedReaction.name,
+			host: decodedReaction.host
+		},
+		select: ['name', 'host', 'url']
+	});
+
+	if (emoji) {
+		emoji = {
+			name: emoji.host ? `${emoji.name}@${emoji.host}` : `${emoji.name}@.`,
+			url: emoji.url
+		} as any;
+	}
+
+	publishNoteStream(note.id, 'reacted', {
+		reaction: decodedReaction.reaction,
+		emoji: emoji,
+		userId: user.id
+	});
+
+	// リアクションされたユーザーがローカルユーザーなら通知を作成
+	if (note.userHost === null) {
+		createNotification(note.userId, 'reaction', {
+			notifierId: user.id,
+			noteId: note.id,
+			reaction: reaction
+		});
+	}
+
+	// Fetch watchers
+	NoteWatchings.find({
+		noteId: note.id,
+		userId: Not(user.id)
+	}).then(watchers => {
+		for (const watcher of watchers) {
+			createNotification(watcher.userId, 'reaction', {
+				notifierId: user.id,
+				noteId: note.id,
+				reaction: reaction
+			});
+		}
+	});
+
+	//#region 配信
+	if (Users.isLocalUser(user) && !note.localOnly) {
+		const content = renderActivity(await renderLike(record, note));
+		const dm = new DeliverManager(user, content);
+		if (note.userHost !== null) {
+			const reactee = await Users.findOne(note.userId);
+			dm.addDirectRecipe(reactee as IRemoteUser);
+		}
+		dm.addFollowersRecipe();
+		dm.execute();
+	}
+	//#endregion
+};