Implement Update Question (#4435)

* Update remote votes count

* save updatedAt

* deliver Update

* use renderNote

* use id

* fix typeof

src/remote/activitypub/models/question.ts

@@ -1,18 +1,8 @@
-import { IChoice, IPoll } from '../../../models/note';
+import config from '../../../config';
+import Note, { IChoice, IPoll } from '../../../models/note';
 import Resolver from '../resolver';
-import { ICollection } from '../type';
-
-interface IQuestionChoice {
-	name?: string;
-	replies?: ICollection;
-	_misskey_votes?: number;
-}
-
-interface IQuestion {
-	oneOf?: IQuestionChoice[];
-	anyOf?: IQuestionChoice[];
-	endTime?: Date;
-}
+import { IQuestion } from '../type';
+import { apLogger } from '../logger';
 
 export async function extractPollFromQuestion(source: string | IQuestion): Promise<IPoll> {
 	const question = typeof source === 'string' ? await new Resolver().resolve(source) as IQuestion : source;
@@ -36,3 +26,54 @@ export async function extractPollFromQuestion(source: string | IQuestion): Promi
 		expiresAt
 	};
 }
+
+/**
+ * Update votes of Question
+ * @param uri URI of AP Question object
+ * @returns true if updated
+ */
+export async function updateQuestion(value: any) {
+	const uri = typeof value == 'string' ? value : value.id;
+
+	// URIがこのサーバーを指しているならスキップ
+	if (uri.startsWith(config.url + '/')) throw 'uri points local';
+
+	//#region このサーバーに既に登録されているか
+	const note = await Note.findOne({ uri });
+
+	if (note == null) throw 'Question is not registed';
+	//#endregion
+
+	// resolve new Question object
+	const resolver = new Resolver();
+	const question = await resolver.resolve(value) as IQuestion;
+	apLogger.debug(`fetched question: ${JSON.stringify(question, null, 2)}`);
+
+	if (question.type !== 'Question') throw 'object is not a Question';
+
+	const apChoices = question.oneOf || question.anyOf;
+	const dbChoices = note.poll.choices;
+
+	let changed = false;
+
+	for (const db of dbChoices) {
+		const oldCount = db.votes;
+		const newCount = apChoices.filter(ap => ap.name === db.text)[0].replies.totalItems;
+
+		if (oldCount != newCount) {
+			changed = true;
+			db.votes = newCount;
+		}
+	}
+
+	await Note.update({
+		_id: note._id
+	}, {
+		$set: {
+			'poll.choices': dbChoices,
+			updatedAt: new Date(),
+		}
+	});
+
+	return changed;
+}