wip

src/server/api/endpoints/notes/user-list-timeline.ts

@@ -0,0 +1,179 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy'; import ID from '../../../../cafy-id';
+import Note from '../../../../models/note';
+import Mute from '../../../../models/mute';
+import { pack } from '../../../../models/note';
+import UserList from '../../../../models/user-list';
+
+/**
+ * Get timeline of a user list
+ */
+module.exports = async (params, user, app) => {
+	// Get 'limit' parameter
+	const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
+	if (limitErr) throw 'invalid limit param';
+
+	// Get 'sinceId' parameter
+	const [sinceId, sinceIdErr] = $(params.sinceId).optional.type(ID).$;
+	if (sinceIdErr) throw 'invalid sinceId param';
+
+	// Get 'untilId' parameter
+	const [untilId, untilIdErr] = $(params.untilId).optional.type(ID).$;
+	if (untilIdErr) throw 'invalid untilId param';
+
+	// Get 'sinceDate' parameter
+	const [sinceDate, sinceDateErr] = $(params.sinceDate).optional.number().$;
+	if (sinceDateErr) throw 'invalid sinceDate param';
+
+	// Get 'untilDate' parameter
+	const [untilDate, untilDateErr] = $(params.untilDate).optional.number().$;
+	if (untilDateErr) throw 'invalid untilDate param';
+
+	// Check if only one of sinceId, untilId, sinceDate, untilDate specified
+	if ([sinceId, untilId, sinceDate, untilDate].filter(x => x != null).length > 1) {
+		throw 'only one of sinceId, untilId, sinceDate, untilDate can be specified';
+	}
+
+	// Get 'includeMyRenotes' parameter
+	const [includeMyRenotes = true, includeMyRenotesErr] = $(params.includeMyRenotes).optional.boolean().$;
+	if (includeMyRenotesErr) throw 'invalid includeMyRenotes param';
+
+	// Get 'includeRenotedMyNotes' parameter
+	const [includeRenotedMyNotes = true, includeRenotedMyNotesErr] = $(params.includeRenotedMyNotes).optional.boolean().$;
+	if (includeRenotedMyNotesErr) throw 'invalid includeRenotedMyNotes param';
+
+	// Get 'listId' parameter
+	const [listId, listIdErr] = $(params.listId).type(ID).$;
+	if (listIdErr) throw 'invalid listId param';
+
+	const [list, mutedUserIds] = await Promise.all([
+		// リストを取得
+		// Fetch the list
+		UserList.findOne({
+			_id: listId,
+			userId: user._id
+		}),
+
+		// ミュートしているユーザーを取得
+		Mute.find({
+			muterId: user._id
+		}).then(ms => ms.map(m => m.muteeId))
+	]);
+
+	if (list.userIds.length == 0) {
+		return [];
+	}
+
+	//#region Construct query
+	const sort = {
+		_id: -1
+	};
+
+	const listQuery = list.userIds.map(u => ({
+		userId: u,
+
+		// リプライは含めない(ただし投稿者自身の投稿へのリプライ、自分の投稿へのリプライ、自分のリプライは含める)
+		$or: [{
+			// リプライでない
+			replyId: null
+		}, { // または
+			// リプライだが返信先が投稿者自身の投稿
+			$expr: {
+				$eq: ['$_reply.userId', '$userId']
+			}
+		}, { // または
+			// リプライだが返信先が自分(フォロワー)の投稿
+			'_reply.userId': user._id
+		}, { // または
+			// 自分(フォロワー)が送信したリプライ
+			userId: user._id
+		}]
+	}));
+
+	const query = {
+		$and: [{
+			// リストに入っている人のタイムラインへの投稿
+			$or: listQuery,
+
+			// mute
+			userId: {
+				$nin: mutedUserIds
+			},
+			'_reply.userId': {
+				$nin: mutedUserIds
+			},
+			'_renote.userId': {
+				$nin: mutedUserIds
+			},
+		}]
+	} as any;
+
+	// MongoDBではトップレベルで否定ができないため、De Morganの法則を利用してクエリします。
+	// つまり、「『自分の投稿かつRenote』ではない」を「『自分の投稿ではない』または『Renoteではない』」と表現します。
+	// for details: https://en.wikipedia.org/wiki/De_Morgan%27s_laws
+
+	if (includeMyRenotes === false) {
+		query.$and.push({
+			$or: [{
+				userId: { $ne: user._id }
+			}, {
+				renoteId: null
+			}, {
+				text: { $ne: null }
+			}, {
+				mediaIds: { $ne: [] }
+			}, {
+				poll: { $ne: null }
+			}]
+		});
+	}
+
+	if (includeRenotedMyNotes === false) {
+		query.$and.push({
+			$or: [{
+				'_renote.userId': { $ne: user._id }
+			}, {
+				renoteId: null
+			}, {
+				text: { $ne: null }
+			}, {
+				mediaIds: { $ne: [] }
+			}, {
+				poll: { $ne: null }
+			}]
+		});
+	}
+
+	if (sinceId) {
+		sort._id = 1;
+		query._id = {
+			$gt: sinceId
+		};
+	} else if (untilId) {
+		query._id = {
+			$lt: untilId
+		};
+	} else if (sinceDate) {
+		sort._id = 1;
+		query.createdAt = {
+			$gt: new Date(sinceDate)
+		};
+	} else if (untilDate) {
+		query.createdAt = {
+			$lt: new Date(untilDate)
+		};
+	}
+	//#endregion
+
+	// Issue query
+	const timeline = await Note
+		.find(query, {
+			limit: limit,
+			sort: sort
+		});
+
+	// Serialize
+	return await Promise.all(timeline.map(note => pack(note, user)));
+};