Do not send needless emojis in note

投稿作成時に含まれている絵文字を保存しておくように

SEE: https://github.com/syuilo/misskey/pull/3085#issuecomment-435608434

src/models/emoji.ts

@@ -16,14 +16,3 @@ export type IEmoji = {
 	aliases?: string[];
 	updatedAt?: Date;
 };
-
-export const packEmojis = async (
-	host: string,
-	// MeiTODO: filter
-) => {
-	return await Emoji.find({ host }, {
-		fields: {
-			_id: false
-		}
-	});
-};

src/models/note.ts

@@ -12,7 +12,7 @@ import { packMany as packFileMany, IDriveFile } from './drive-file';
 import Favorite from './favorite';
 import Following from './following';
 import config from '../config';
-import { packEmojis } from './emoji';
+import Emoji from './emoji';
 
 const Note = db.get<INote>('notes');
 Note.createIndex('uri', { sparse: true, unique: true });
@@ -50,6 +50,7 @@ export type INote = {
 	text: string;
 	tags: string[];
 	tagsLower: string[];
+	emojis: string[];
 	cw: string;
 	userId: mongo.ObjectID;
 	appId: mongo.ObjectID;
@@ -231,7 +232,22 @@ export const pack = async (
 
 	// _note._userを消す前か、_note.userを解決した後でないとホストがわからない
 	if (_note._user) {
-		_note.emojis = packEmojis(_note._user.host);
+		const host = _note._user.host;
+		// 互換性のため。(古いMisskeyではNoteにemojisが無い)
+		if (_note.emojis == null) {
+			_note.emojis = Emoji.find({
+				host: host
+			}, {
+				fields: { _id: false }
+			});
+		} else {
+			_note.emojis = Emoji.find({
+				name: { $in: _note.emojis },
+				host: host
+			}, {
+				fields: { _id: false }
+			});
+		}
 	}
 
 	// Rename _id to id