refactoring

Resolve #7779

31 files changed, 2806 insertions, 0 deletions

diff --git a/packages/backend/src/server/api/endpoints/notes/children.ts b/packages/backend/src/server/api/endpoints/notes/children.ts
new file mode 100644
index 0000000000..68881fda9e
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/children.ts
@@ -0,0 +1,72 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { Brackets } from 'typeorm';
+import { Notes } from '@/models/index';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'), ps.sinceId, ps.untilId)
+		.andWhere(new Brackets(qb => { qb
+			.where(`note.replyId = :noteId`, { noteId: ps.noteId })
+			.orWhere(new Brackets(qb => { qb
+				.where(`note.renoteId = :noteId`, { noteId: ps.noteId })
+				.andWhere(new Brackets(qb => { qb
+					.where(`note.text IS NOT NULL`)
+					.orWhere(`note.fileIds != '{}'`)
+					.orWhere(`note.hasPoll = TRUE`);
+				}));
+			}));
+		}))
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser');
+
+	generateVisibilityQuery(query, user);
+	if (user) generateMutedUserQuery(query, user);
+	if (user) generateBlockedUserQuery(query, user);
+
+	const notes = await query.take(ps.limit!).getMany();
+
+	return await Notes.packMany(notes, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/clips.ts b/packages/backend/src/server/api/endpoints/notes/clips.ts
new file mode 100644
index 0000000000..6b303d87ec
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/clips.ts
@@ -0,0 +1,55 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { ClipNotes, Clips } from '@/models/index';
+import { getNote } from '../../common/getters';
+import { ApiError } from '../../error';
+import { In } from 'typeorm';
+
+export const meta = {
+	tags: ['clips', 'notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '47db1a1c-b0af-458d-8fb4-986e4efafe1e'
+		}
+	}
+};
+
+export default define(meta, async (ps, me) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	const clipNotes = await ClipNotes.find({
+		noteId: note.id,
+	});
+
+	const clips = await Clips.find({
+		id: In(clipNotes.map(x => x.clipId)),
+		isPublic: true
+	});
+
+	return await Promise.all(clips.map(x => Clips.pack(x)));
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/conversation.ts b/packages/backend/src/server/api/endpoints/notes/conversation.ts
new file mode 100644
index 0000000000..0fe323ea00
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/conversation.ts
@@ -0,0 +1,81 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { ApiError } from '../../error';
+import { getNote } from '../../common/getters';
+import { Note } from '@/models/entities/note';
+import { Notes } from '@/models/index';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		offset: {
+			validator: $.optional.num.min(0),
+			default: 0
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: 'e1035875-9551-45ec-afa8-1ded1fcb53c8'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	const conversation: Note[] = [];
+	let i = 0;
+
+	async function get(id: any) {
+		i++;
+		const p = await Notes.findOne(id);
+		if (p == null) return;
+
+		if (i > ps.offset!) {
+			conversation.push(p);
+		}
+
+		if (conversation.length == ps.limit!) {
+			return;
+		}
+
+		if (p.replyId) {
+			await get(p.replyId);
+		}
+	}
+
+	if (note.replyId) {
+		await get(note.replyId);
+	}
+
+	return await Notes.packMany(conversation, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/create.ts b/packages/backend/src/server/api/endpoints/notes/create.ts
new file mode 100644
index 0000000000..751673f955
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/create.ts
@@ -0,0 +1,299 @@
+import $ from 'cafy';
+import * as ms from 'ms';
+import { length } from 'stringz';
+import create from '@/services/note/create';
+import define from '../../define';
+import { fetchMeta } from '@/misc/fetch-meta';
+import { ApiError } from '../../error';
+import { ID } from '@/misc/cafy-id';
+import { User } from '@/models/entities/user';
+import { Users, DriveFiles, Notes, Channels, Blockings } from '@/models/index';
+import { DriveFile } from '@/models/entities/drive-file';
+import { Note } from '@/models/entities/note';
+import { DB_MAX_NOTE_TEXT_LENGTH } from '@/misc/hard-limits';
+import { noteVisibilities } from '../../../../types';
+import { Channel } from '@/models/entities/channel';
+
+let maxNoteTextLength = 500;
+
+setInterval(() => {
+	fetchMeta().then(m => {
+		maxNoteTextLength = m.maxNoteTextLength;
+	});
+}, 3000);
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	limit: {
+		duration: ms('1hour'),
+		max: 300
+	},
+
+	kind: 'write:notes',
+
+	params: {
+		visibility: {
+			validator: $.optional.str.or(noteVisibilities as unknown as string[]),
+			default: 'public',
+		},
+
+		visibleUserIds: {
+			validator: $.optional.arr($.type(ID)).unique().min(0),
+		},
+
+		text: {
+			validator: $.optional.nullable.str.pipe(text =>
+				text.trim() != ''
+					&& length(text.trim()) <= maxNoteTextLength
+					&& Array.from(text.trim()).length <= DB_MAX_NOTE_TEXT_LENGTH	// DB limit
+			),
+			default: null,
+		},
+
+		cw: {
+			validator: $.optional.nullable.str.pipe(Notes.validateCw),
+		},
+
+		viaMobile: {
+			validator: $.optional.bool,
+			default: false,
+		},
+
+		localOnly: {
+			validator: $.optional.bool,
+			default: false,
+		},
+
+		noExtractMentions: {
+			validator: $.optional.bool,
+			default: false,
+		},
+
+		noExtractHashtags: {
+			validator: $.optional.bool,
+			default: false,
+		},
+
+		noExtractEmojis: {
+			validator: $.optional.bool,
+			default: false,
+		},
+
+		fileIds: {
+			validator: $.optional.arr($.type(ID)).unique().range(1, 4),
+		},
+
+		mediaIds: {
+			validator: $.optional.arr($.type(ID)).unique().range(1, 4),
+			deprecated: true,
+		},
+
+		replyId: {
+			validator: $.optional.nullable.type(ID),
+		},
+
+		renoteId: {
+			validator: $.optional.nullable.type(ID),
+		},
+
+		channelId: {
+			validator: $.optional.nullable.type(ID),
+		},
+
+		poll: {
+			validator: $.optional.nullable.obj({
+				choices: $.arr($.str)
+					.unique()
+					.range(2, 10)
+					.each(c => c.length > 0 && c.length < 50),
+				multiple: $.optional.bool,
+				expiresAt: $.optional.nullable.num.int(),
+				expiredAfter: $.optional.nullable.num.int().min(1)
+			}).strict(),
+			ref: 'poll'
+		}
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		properties: {
+			createdNote: {
+				type: 'object' as const,
+				optional: false as const, nullable: false as const,
+				ref: 'Note',
+			}
+		}
+	},
+
+	errors: {
+		noSuchRenoteTarget: {
+			message: 'No such renote target.',
+			code: 'NO_SUCH_RENOTE_TARGET',
+			id: 'b5c90186-4ab0-49c8-9bba-a1f76c282ba4'
+		},
+
+		cannotReRenote: {
+			message: 'You can not Renote a pure Renote.',
+			code: 'CANNOT_RENOTE_TO_A_PURE_RENOTE',
+			id: 'fd4cc33e-2a37-48dd-99cc-9b806eb2031a'
+		},
+
+		noSuchReplyTarget: {
+			message: 'No such reply target.',
+			code: 'NO_SUCH_REPLY_TARGET',
+			id: '749ee0f6-d3da-459a-bf02-282e2da4292c'
+		},
+
+		cannotReplyToPureRenote: {
+			message: 'You can not reply to a pure Renote.',
+			code: 'CANNOT_REPLY_TO_A_PURE_RENOTE',
+			id: '3ac74a84-8fd5-4bb0-870f-01804f82ce15'
+		},
+
+		contentRequired: {
+			message: 'Content required. You need to set text, fileIds, renoteId or poll.',
+			code: 'CONTENT_REQUIRED',
+			id: '6f57e42b-c348-439b-bc45-993995cc515a'
+		},
+
+		cannotCreateAlreadyExpiredPoll: {
+			message: 'Poll is already expired.',
+			code: 'CANNOT_CREATE_ALREADY_EXPIRED_POLL',
+			id: '04da457d-b083-4055-9082-955525eda5a5'
+		},
+
+		noSuchChannel: {
+			message: 'No such channel.',
+			code: 'NO_SUCH_CHANNEL',
+			id: 'b1653923-5453-4edc-b786-7c4f39bb0bbb'
+		},
+
+		youHaveBeenBlocked: {
+			message: 'You have been blocked by this user.',
+			code: 'YOU_HAVE_BEEN_BLOCKED',
+			id: 'b390d7e1-8a5e-46ed-b625-06271cafd3d3'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	let visibleUsers: User[] = [];
+	if (ps.visibleUserIds) {
+		visibleUsers = (await Promise.all(ps.visibleUserIds.map(id => Users.findOne(id))))
+			.filter(x => x != null) as User[];
+	}
+
+	let files: DriveFile[] = [];
+	const fileIds = ps.fileIds != null ? ps.fileIds : ps.mediaIds != null ? ps.mediaIds : null;
+	if (fileIds != null) {
+		files = (await Promise.all(fileIds.map(fileId =>
+			DriveFiles.findOne({
+				id: fileId,
+				userId: user.id
+			})
+		))).filter(file => file != null) as DriveFile[];
+	}
+
+	let renote: Note | undefined;
+	if (ps.renoteId != null) {
+		// Fetch renote to note
+		renote = await Notes.findOne(ps.renoteId);
+
+		if (renote == null) {
+			throw new ApiError(meta.errors.noSuchRenoteTarget);
+		} else if (renote.renoteId && !renote.text && !renote.fileIds) {
+			throw new ApiError(meta.errors.cannotReRenote);
+		}
+
+		// Check blocking
+		if (renote.userId !== user.id) {
+			const block = await Blockings.findOne({
+				blockerId: renote.userId,
+				blockeeId: user.id,
+			});
+			if (block) {
+				throw new ApiError(meta.errors.youHaveBeenBlocked);
+			}
+		}
+	}
+
+	let reply: Note | undefined;
+	if (ps.replyId != null) {
+		// Fetch reply
+		reply = await Notes.findOne(ps.replyId);
+
+		if (reply == null) {
+			throw new ApiError(meta.errors.noSuchReplyTarget);
+		}
+
+		// 返信対象が引用でないRenoteだったらエラー
+		if (reply.renoteId && !reply.text && !reply.fileIds) {
+			throw new ApiError(meta.errors.cannotReplyToPureRenote);
+		}
+
+		// Check blocking
+		if (reply.userId !== user.id) {
+			const block = await Blockings.findOne({
+				blockerId: reply.userId,
+				blockeeId: user.id,
+			});
+			if (block) {
+				throw new ApiError(meta.errors.youHaveBeenBlocked);
+			}
+		}
+	}
+
+	if (ps.poll) {
+		if (typeof ps.poll.expiresAt === 'number') {
+			if (ps.poll.expiresAt < Date.now())
+				throw new ApiError(meta.errors.cannotCreateAlreadyExpiredPoll);
+		} else if (typeof ps.poll.expiredAfter === 'number') {
+			ps.poll.expiresAt = Date.now() + ps.poll.expiredAfter;
+		}
+	}
+
+	// テキストが無いかつ添付ファイルが無いかつRenoteも無いかつ投票も無かったらエラー
+	if (!(ps.text || files.length || renote || ps.poll)) {
+		throw new ApiError(meta.errors.contentRequired);
+	}
+
+	let channel: Channel | undefined;
+	if (ps.channelId != null) {
+		channel = await Channels.findOne(ps.channelId);
+
+		if (channel == null) {
+			throw new ApiError(meta.errors.noSuchChannel);
+		}
+	}
+
+	// 投稿を作成
+	const note = await create(user, {
+		createdAt: new Date(),
+		files: files,
+		poll: ps.poll ? {
+			choices: ps.poll.choices,
+			multiple: ps.poll.multiple || false,
+			expiresAt: ps.poll.expiresAt ? new Date(ps.poll.expiresAt) : null
+		} : undefined,
+		text: ps.text || undefined,
+		reply,
+		renote,
+		cw: ps.cw,
+		viaMobile: ps.viaMobile,
+		localOnly: ps.localOnly,
+		visibility: ps.visibility,
+		visibleUsers,
+		channel,
+		apMentions: ps.noExtractMentions ? [] : undefined,
+		apHashtags: ps.noExtractHashtags ? [] : undefined,
+		apEmojis: ps.noExtractEmojis ? [] : undefined,
+	});
+
+	return {
+		createdNote: await Notes.pack(note, user)
+	};
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/delete.ts b/packages/backend/src/server/api/endpoints/notes/delete.ts
new file mode 100644
index 0000000000..7163a2b9d2
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/delete.ts
@@ -0,0 +1,56 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import deleteNote from '@/services/note/delete';
+import define from '../../define';
+import * as ms from 'ms';
+import { getNote } from '../../common/getters';
+import { ApiError } from '../../error';
+import { Users } from '@/models/index';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	kind: 'write:notes',
+
+	limit: {
+		duration: ms('1hour'),
+		max: 300,
+		minInterval: ms('1sec')
+	},
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '490be23f-8c1f-4796-819f-94cb4f9d1630'
+		},
+
+		accessDenied: {
+			message: 'Access denied.',
+			code: 'ACCESS_DENIED',
+			id: 'fe8d7103-0ea8-4ec3-814d-f8b401dc69e9'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	if (!user.isAdmin && !user.isModerator && (note.userId !== user.id)) {
+		throw new ApiError(meta.errors.accessDenied);
+	}
+
+	// この操作を行うのが投稿者とは限らない(例えばモデレーター)ため
+	await deleteNote(await Users.findOneOrFail(note.userId), note);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/favorites/create.ts b/packages/backend/src/server/api/endpoints/notes/favorites/create.ts
new file mode 100644
index 0000000000..1bb25edd7f
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/favorites/create.ts
@@ -0,0 +1,61 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { getNote } from '../../../common/getters';
+import { NoteFavorites } from '@/models/index';
+import { genId } from '@/misc/gen-id';
+
+export const meta = {
+	tags: ['notes', 'favorites'],
+
+	requireCredential: true as const,
+
+	kind: 'write:favorites',
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '6dd26674-e060-4816-909a-45ba3f4da458'
+		},
+
+		alreadyFavorited: {
+			message: 'The note has already been marked as a favorite.',
+			code: 'ALREADY_FAVORITED',
+			id: 'a402c12b-34dd-41d2-97d8-4d2ffd96a1a6'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	// Get favoritee
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	// if already favorited
+	const exist = await NoteFavorites.findOne({
+		noteId: note.id,
+		userId: user.id
+	});
+
+	if (exist != null) {
+		throw new ApiError(meta.errors.alreadyFavorited);
+	}
+
+	// Create favorite
+	await NoteFavorites.insert({
+		id: genId(),
+		createdAt: new Date(),
+		noteId: note.id,
+		userId: user.id
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/favorites/delete.ts b/packages/backend/src/server/api/endpoints/notes/favorites/delete.ts
new file mode 100644
index 0000000000..75eb9a359a
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/favorites/delete.ts
@@ -0,0 +1,55 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { getNote } from '../../../common/getters';
+import { NoteFavorites } from '@/models/index';
+
+export const meta = {
+	tags: ['notes', 'favorites'],
+
+	requireCredential: true as const,
+
+	kind: 'write:favorites',
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '80848a2c-398f-4343-baa9-df1d57696c56'
+		},
+
+		notFavorited: {
+			message: 'You have not marked that note a favorite.',
+			code: 'NOT_FAVORITED',
+			id: 'b625fc69-635e-45e9-86f4-dbefbef35af5'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	// Get favoritee
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	// if already favorited
+	const exist = await NoteFavorites.findOne({
+		noteId: note.id,
+		userId: user.id
+	});
+
+	if (exist == null) {
+		throw new ApiError(meta.errors.notFavorited);
+	}
+
+	// Delete favorite
+	await NoteFavorites.delete(exist.id);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/featured.ts b/packages/backend/src/server/api/endpoints/notes/featured.ts
new file mode 100644
index 0000000000..8d33c0e73d
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/featured.ts
@@ -0,0 +1,64 @@
+import $ from 'cafy';
+import define from '../../define';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { Notes } from '@/models/index';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10,
+		},
+
+		offset: {
+			validator: $.optional.num.min(0),
+			default: 0
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const max = 30;
+	const day = 1000 * 60 * 60 * 24 * 3; // 3日前まで
+
+	const query = Notes.createQueryBuilder('note')
+		.addSelect('note.score')
+		.where('note.userHost IS NULL')
+		.andWhere(`note.score > 0`)
+		.andWhere(`note.createdAt > :date`, { date: new Date(Date.now() - day) })
+		.andWhere(`note.visibility = 'public'`)
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser');
+
+	if (user) generateMutedUserQuery(query, user);
+	if (user) generateBlockedUserQuery(query, user);
+
+	let notes = await query
+		.orderBy('note.score', 'DESC')
+		.take(max)
+		.getMany();
+
+	notes.sort((a, b) => new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime());
+
+	notes = notes.slice(ps.offset, ps.offset + ps.limit);
+
+	return await Notes.packMany(notes, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/global-timeline.ts b/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
new file mode 100644
index 0000000000..5902c0415c
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
@@ -0,0 +1,101 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { fetchMeta } from '@/misc/fetch-meta';
+import { ApiError } from '../../error';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { Notes } from '@/models/index';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { activeUsersChart } from '@/services/chart/index';
+import { generateRepliesQuery } from '../../common/generate-replies-query';
+import { generateMutedNoteQuery } from '../../common/generate-muted-note-query';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	params: {
+		withFiles: {
+			validator: $.optional.bool,
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		sinceDate: {
+			validator: $.optional.num
+		},
+
+		untilDate: {
+			validator: $.optional.num
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+
+	errors: {
+		gtlDisabled: {
+			message: 'Global timeline has been disabled.',
+			code: 'GTL_DISABLED',
+			id: '0332fc13-6ab2-4427-ae80-a9fadffd1a6b'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const m = await fetchMeta();
+	if (m.disableGlobalTimeline) {
+		if (user == null || (!user.isAdmin && !user.isModerator)) {
+			throw new ApiError(meta.errors.gtlDisabled);
+		}
+	}
+
+	//#region Construct query
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'),
+			ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+		.andWhere('note.visibility = \'public\'')
+		.andWhere('note.channelId IS NULL')
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser');
+
+	generateRepliesQuery(query, user);
+	if (user) generateMutedUserQuery(query, user);
+	if (user) generateMutedNoteQuery(query, user);
+	if (user) generateBlockedUserQuery(query, user);
+
+	if (ps.withFiles) {
+		query.andWhere('note.fileIds != \'{}\'');
+	}
+	//#endregion
+
+	const timeline = await query.take(ps.limit!).getMany();
+
+	process.nextTick(() => {
+		if (user) {
+			activeUsersChart.update(user);
+		}
+	});
+
+	return await Notes.packMany(timeline, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
new file mode 100644
index 0000000000..47f08f208b
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
@@ -0,0 +1,158 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { fetchMeta } from '@/misc/fetch-meta';
+import { ApiError } from '../../error';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { Followings, Notes } from '@/models/index';
+import { Brackets } from 'typeorm';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { activeUsersChart } from '@/services/chart/index';
+import { generateRepliesQuery } from '../../common/generate-replies-query';
+import { generateMutedNoteQuery } from '../../common/generate-muted-note-query';
+import { generateChannelQuery } from '../../common/generate-channel-query';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	params: {
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10,
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		sinceDate: {
+			validator: $.optional.num,
+		},
+
+		untilDate: {
+			validator: $.optional.num,
+		},
+
+		includeMyRenotes: {
+			validator: $.optional.bool,
+			default: true,
+		},
+
+		includeRenotedMyNotes: {
+			validator: $.optional.bool,
+			default: true,
+		},
+
+		includeLocalRenotes: {
+			validator: $.optional.bool,
+			default: true,
+		},
+
+		withFiles: {
+			validator: $.optional.bool,
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+
+	errors: {
+		stlDisabled: {
+			message: 'Hybrid timeline has been disabled.',
+			code: 'STL_DISABLED',
+			id: '620763f4-f621-4533-ab33-0577a1a3c342'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const m = await fetchMeta();
+	if (m.disableLocalTimeline && !user.isAdmin && !user.isModerator) {
+		throw new ApiError(meta.errors.stlDisabled);
+	}
+
+	//#region Construct query
+	const followingQuery = Followings.createQueryBuilder('following')
+		.select('following.followeeId')
+		.where('following.followerId = :followerId', { followerId: user.id });
+
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'),
+			ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+		.andWhere(new Brackets(qb => {
+			qb.where(`((note.userId IN (${ followingQuery.getQuery() })) OR (note.userId = :meId))`, { meId: user.id })
+				.orWhere('(note.visibility = \'public\') AND (note.userHost IS NULL)');
+		}))
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser')
+		.setParameters(followingQuery.getParameters());
+
+	generateChannelQuery(query, user);
+	generateRepliesQuery(query, user);
+	generateVisibilityQuery(query, user);
+	generateMutedUserQuery(query, user);
+	generateMutedNoteQuery(query, user);
+	generateBlockedUserQuery(query, user);
+
+	if (ps.includeMyRenotes === false) {
+		query.andWhere(new Brackets(qb => {
+			qb.orWhere('note.userId != :meId', { meId: user.id });
+			qb.orWhere('note.renoteId IS NULL');
+			qb.orWhere('note.text IS NOT NULL');
+			qb.orWhere('note.fileIds != \'{}\'');
+			qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+		}));
+	}
+
+	if (ps.includeRenotedMyNotes === false) {
+		query.andWhere(new Brackets(qb => {
+			qb.orWhere('note.renoteUserId != :meId', { meId: user.id });
+			qb.orWhere('note.renoteId IS NULL');
+			qb.orWhere('note.text IS NOT NULL');
+			qb.orWhere('note.fileIds != \'{}\'');
+			qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+		}));
+	}
+
+	if (ps.includeLocalRenotes === false) {
+		query.andWhere(new Brackets(qb => {
+			qb.orWhere('note.renoteUserHost IS NOT NULL');
+			qb.orWhere('note.renoteId IS NULL');
+			qb.orWhere('note.text IS NOT NULL');
+			qb.orWhere('note.fileIds != \'{}\'');
+			qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+		}));
+	}
+
+	if (ps.withFiles) {
+		query.andWhere('note.fileIds != \'{}\'');
+	}
+	//#endregion
+
+	const timeline = await query.take(ps.limit!).getMany();
+
+	process.nextTick(() => {
+		if (user) {
+			activeUsersChart.update(user);
+		}
+	});
+
+	return await Notes.packMany(timeline, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
new file mode 100644
index 0000000000..f670d478bf
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
@@ -0,0 +1,129 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { fetchMeta } from '@/misc/fetch-meta';
+import { ApiError } from '../../error';
+import { Notes } from '@/models/index';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { activeUsersChart } from '@/services/chart/index';
+import { Brackets } from 'typeorm';
+import { generateRepliesQuery } from '../../common/generate-replies-query';
+import { generateMutedNoteQuery } from '../../common/generate-muted-note-query';
+import { generateChannelQuery } from '../../common/generate-channel-query';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	params: {
+		withFiles: {
+			validator: $.optional.bool,
+		},
+
+		fileType: {
+			validator: $.optional.arr($.str),
+		},
+
+		excludeNsfw: {
+			validator: $.optional.bool,
+			default: false,
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		sinceDate: {
+			validator: $.optional.num,
+		},
+
+		untilDate: {
+			validator: $.optional.num,
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+
+	errors: {
+		ltlDisabled: {
+			message: 'Local timeline has been disabled.',
+			code: 'LTL_DISABLED',
+			id: '45a6eb02-7695-4393-b023-dd3be9aaaefd'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const m = await fetchMeta();
+	if (m.disableLocalTimeline) {
+		if (user == null || (!user.isAdmin && !user.isModerator)) {
+			throw new ApiError(meta.errors.ltlDisabled);
+		}
+	}
+
+	//#region Construct query
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'),
+			ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+		.andWhere('(note.visibility = \'public\') AND (note.userHost IS NULL)')
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser');
+
+	generateChannelQuery(query, user);
+	generateRepliesQuery(query, user);
+	generateVisibilityQuery(query, user);
+	if (user) generateMutedUserQuery(query, user);
+	if (user) generateMutedNoteQuery(query, user);
+	if (user) generateBlockedUserQuery(query, user);
+
+	if (ps.withFiles) {
+		query.andWhere('note.fileIds != \'{}\'');
+	}
+
+	if (ps.fileType != null) {
+		query.andWhere('note.fileIds != \'{}\'');
+		query.andWhere(new Brackets(qb => {
+			for (const type of ps.fileType!) {
+				const i = ps.fileType!.indexOf(type);
+				qb.orWhere(`:type${i} = ANY(note.attachedFileTypes)`, { [`type${i}`]: type });
+			}
+		}));
+
+		if (ps.excludeNsfw) {
+			query.andWhere('note.cw IS NULL');
+			query.andWhere('0 = (SELECT COUNT(*) FROM drive_file df WHERE df.id = ANY(note."fileIds") AND df."isSensitive" = TRUE)');
+		}
+	}
+	//#endregion
+
+	const timeline = await query.take(ps.limit!).getMany();
+
+	process.nextTick(() => {
+		if (user) {
+			activeUsersChart.update(user);
+		}
+	});
+
+	return await Notes.packMany(timeline, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/mentions.ts b/packages/backend/src/server/api/endpoints/notes/mentions.ts
new file mode 100644
index 0000000000..ffaebd6c95
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/mentions.ts
@@ -0,0 +1,88 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import read from '@/services/note/read';
+import { Notes, Followings } from '@/models/index';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { Brackets } from 'typeorm';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+import { generateMutedNoteThreadQuery } from '../../common/generate-muted-note-thread-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	params: {
+		following: {
+			validator: $.optional.bool,
+			default: false
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		visibility: {
+			validator: $.optional.str,
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const followingQuery = Followings.createQueryBuilder('following')
+		.select('following.followeeId')
+		.where('following.followerId = :followerId', { followerId: user.id });
+
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'), ps.sinceId, ps.untilId)
+		.andWhere(new Brackets(qb => { qb
+			.where(`'{"${user.id}"}' <@ note.mentions`)
+			.orWhere(`'{"${user.id}"}' <@ note.visibleUserIds`);
+		}))
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser');
+
+	generateVisibilityQuery(query, user);
+	generateMutedUserQuery(query, user);
+	generateMutedNoteThreadQuery(query, user);
+	generateBlockedUserQuery(query, user);
+
+	if (ps.visibility) {
+		query.andWhere('note.visibility = :visibility', { visibility: ps.visibility });
+	}
+
+	if (ps.following) {
+		query.andWhere(`((note.userId IN (${ followingQuery.getQuery() })) OR (note.userId = :meId))`, { meId: user.id });
+		query.setParameters(followingQuery.getParameters());
+	}
+
+	const mentions = await query.take(ps.limit!).getMany();
+
+	read(user.id, mentions);
+
+	return await Notes.packMany(mentions, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/polls/recommendation.ts b/packages/backend/src/server/api/endpoints/notes/polls/recommendation.ts
new file mode 100644
index 0000000000..0763f0c8fd
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/polls/recommendation.ts
@@ -0,0 +1,77 @@
+import $ from 'cafy';
+import define from '../../../define';
+import { Polls, Mutings, Notes, PollVotes } from '@/models/index';
+import { Brackets, In } from 'typeorm';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	params: {
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		offset: {
+			validator: $.optional.num.min(0),
+			default: 0
+		}
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const query = Polls.createQueryBuilder('poll')
+		.where('poll.userHost IS NULL')
+		.andWhere(`poll.userId != :meId`, { meId: user.id })
+		.andWhere(`poll.noteVisibility = 'public'`)
+		.andWhere(new Brackets(qb => { qb
+			.where('poll.expiresAt IS NULL')
+			.orWhere('poll.expiresAt > :now', { now: new Date() });
+		}));
+
+	//#region exclude arleady voted polls
+	const votedQuery = PollVotes.createQueryBuilder('vote')
+		.select('vote.noteId')
+		.where('vote.userId = :meId', { meId: user.id });
+
+	query
+		.andWhere(`poll.noteId NOT IN (${ votedQuery.getQuery() })`);
+
+	query.setParameters(votedQuery.getParameters());
+	//#endregion
+
+	//#region mute
+	const mutingQuery = Mutings.createQueryBuilder('muting')
+		.select('muting.muteeId')
+		.where('muting.muterId = :muterId', { muterId: user.id });
+
+	query
+		.andWhere(`poll.userId NOT IN (${ mutingQuery.getQuery() })`);
+
+	query.setParameters(mutingQuery.getParameters());
+	//#endregion
+
+	const polls = await query.take(ps.limit!).skip(ps.offset).getMany();
+
+	if (polls.length === 0) return [];
+
+	const notes = await Notes.find({
+		id: In(polls.map(poll => poll.noteId))
+	});
+
+	return await Notes.packMany(notes, user, {
+		detail: true
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/polls/vote.ts b/packages/backend/src/server/api/endpoints/notes/polls/vote.ts
new file mode 100644
index 0000000000..f670501385
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/polls/vote.ts
@@ -0,0 +1,170 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import { publishNoteStream } from '@/services/stream';
+import { createNotification } from '@/services/create-notification';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { getNote } from '../../../common/getters';
+import { deliver } from '@/queue/index';
+import { renderActivity } from '@/remote/activitypub/renderer/index';
+import renderVote from '@/remote/activitypub/renderer/vote';
+import { deliverQuestionUpdate } from '@/services/note/polls/update';
+import { PollVotes, NoteWatchings, Users, Polls, Blockings } from '@/models/index';
+import { Not } from 'typeorm';
+import { IRemoteUser } from '@/models/entities/user';
+import { genId } from '@/misc/gen-id';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	kind: 'write:votes',
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+
+		choice: {
+			validator: $.num
+		},
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: 'ecafbd2e-c283-4d6d-aecb-1a0a33b75396'
+		},
+
+		noPoll: {
+			message: 'The note does not attach a poll.',
+			code: 'NO_POLL',
+			id: '5f979967-52d9-4314-a911-1c673727f92f'
+		},
+
+		invalidChoice: {
+			message: 'Choice ID is invalid.',
+			code: 'INVALID_CHOICE',
+			id: 'e0cc9a04-f2e8-41e4-a5f1-4127293260cc'
+		},
+
+		alreadyVoted: {
+			message: 'You have already voted.',
+			code: 'ALREADY_VOTED',
+			id: '0963fc77-efac-419b-9424-b391608dc6d8'
+		},
+
+		alreadyExpired: {
+			message: 'The poll is already expired.',
+			code: 'ALREADY_EXPIRED',
+			id: '1022a357-b085-4054-9083-8f8de358337e'
+		},
+
+		youHaveBeenBlocked: {
+			message: 'You cannot vote this poll because you have been blocked by this user.',
+			code: 'YOU_HAVE_BEEN_BLOCKED',
+			id: '85a5377e-b1e9-4617-b0b9-5bea73331e49'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const createdAt = new Date();
+
+	// Get votee
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	if (!note.hasPoll) {
+		throw new ApiError(meta.errors.noPoll);
+	}
+
+	// Check blocking
+	if (note.userId !== user.id) {
+		const block = await Blockings.findOne({
+			blockerId: note.userId,
+			blockeeId: user.id,
+		});
+		if (block) {
+			throw new ApiError(meta.errors.youHaveBeenBlocked);
+		}
+	}
+
+	const poll = await Polls.findOneOrFail({ noteId: note.id });
+
+	if (poll.expiresAt && poll.expiresAt < createdAt) {
+		throw new ApiError(meta.errors.alreadyExpired);
+	}
+
+	if (poll.choices[ps.choice] == null) {
+		throw new ApiError(meta.errors.invalidChoice);
+	}
+
+	// if already voted
+	const exist = await PollVotes.find({
+		noteId: note.id,
+		userId: user.id
+	});
+
+	if (exist.length) {
+		if (poll.multiple) {
+			if (exist.some(x => x.choice == ps.choice))
+				throw new ApiError(meta.errors.alreadyVoted);
+		} else {
+			throw new ApiError(meta.errors.alreadyVoted);
+		}
+	}
+
+	// Create vote
+	const vote = await PollVotes.insert({
+		id: genId(),
+		createdAt,
+		noteId: note.id,
+		userId: user.id,
+		choice: ps.choice
+	}).then(x => PollVotes.findOneOrFail(x.identifiers[0]));
+
+	// Increment votes count
+	const index = ps.choice + 1; // In SQL, array index is 1 based
+	await Polls.query(`UPDATE poll SET votes[${index}] = votes[${index}] + 1 WHERE "noteId" = '${poll.noteId}'`);
+
+	publishNoteStream(note.id, 'pollVoted', {
+		choice: ps.choice,
+		userId: user.id
+	});
+
+	// Notify
+	createNotification(note.userId, 'pollVote', {
+		notifierId: user.id,
+		noteId: note.id,
+		choice: ps.choice
+	});
+
+	// Fetch watchers
+	NoteWatchings.find({
+		noteId: note.id,
+		userId: Not(user.id),
+	}).then(watchers => {
+		for (const watcher of watchers) {
+			createNotification(watcher.userId, 'pollVote', {
+				notifierId: user.id,
+				noteId: note.id,
+				choice: ps.choice
+			});
+		}
+	});
+
+	// リモート投票の場合リプライ送信
+	if (note.userHost != null) {
+		const pollOwner = await Users.findOneOrFail(note.userId) as IRemoteUser;
+
+		deliver(user, renderActivity(await renderVote(user, vote, note, poll, pollOwner)), pollOwner.inbox);
+	}
+
+	// リモートフォロワーにUpdate配信
+	deliverQuestionUpdate(note.id);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/reactions.ts b/packages/backend/src/server/api/endpoints/notes/reactions.ts
new file mode 100644
index 0000000000..09dd6b600b
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/reactions.ts
@@ -0,0 +1,90 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { getNote } from '../../common/getters';
+import { ApiError } from '../../error';
+import { NoteReactions } from '@/models/index';
+import { DeepPartial } from 'typeorm';
+import { NoteReaction } from '@/models/entities/note-reaction';
+
+export const meta = {
+	tags: ['notes', 'reactions'],
+
+	requireCredential: false as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+
+		type: {
+			validator: $.optional.nullable.str,
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		offset: {
+			validator: $.optional.num,
+			default: 0
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'NoteReaction',
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '263fff3d-d0e1-4af4-bea7-8408059b451a'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	const query = {
+		noteId: note.id
+	} as DeepPartial<NoteReaction>;
+
+	if (ps.type) {
+		// ローカルリアクションはホスト名が . とされているが
+		// DB 上ではそうではないので、必要に応じて変換
+		const suffix = '@.:';
+		const type = ps.type.endsWith(suffix) ? ps.type.slice(0, ps.type.length - suffix.length) + ':' : ps.type;
+		query.reaction = type;
+	}
+
+	const reactions = await NoteReactions.find({
+		where: query,
+		take: ps.limit!,
+		skip: ps.offset,
+		order: {
+			id: -1
+		}
+	});
+
+	return await Promise.all(reactions.map(reaction => NoteReactions.pack(reaction, user)));
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/reactions/create.ts b/packages/backend/src/server/api/endpoints/notes/reactions/create.ts
new file mode 100644
index 0000000000..24a73a8d4f
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/reactions/create.ts
@@ -0,0 +1,57 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import createReaction from '@/services/note/reaction/create';
+import define from '../../../define';
+import { getNote } from '../../../common/getters';
+import { ApiError } from '../../../error';
+
+export const meta = {
+	tags: ['reactions', 'notes'],
+
+	requireCredential: true as const,
+
+	kind: 'write:reactions',
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+
+		reaction: {
+			validator: $.str,
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '033d0620-5bfe-4027-965d-980b0c85a3ea'
+		},
+
+		alreadyReacted: {
+			message: 'You are already reacting to that note.',
+			code: 'ALREADY_REACTED',
+			id: '71efcf98-86d6-4e2b-b2ad-9d032369366b'
+		},
+
+		youHaveBeenBlocked: {
+			message: 'You cannot react this note because you have been blocked by this user.',
+			code: 'YOU_HAVE_BEEN_BLOCKED',
+			id: '20ef5475-9f38-4e4c-bd33-de6d979498ec'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+	await createReaction(user, note, ps.reaction).catch(e => {
+		if (e.id === '51c42bb4-931a-456b-bff7-e5a8a70dd298') throw new ApiError(meta.errors.alreadyReacted);
+		if (e.id === 'e70412a4-7197-4726-8e74-f3e0deb92aa7') throw new ApiError(meta.errors.youHaveBeenBlocked);
+		throw e;
+	});
+	return;
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/reactions/delete.ts b/packages/backend/src/server/api/endpoints/notes/reactions/delete.ts
new file mode 100644
index 0000000000..69550f96de
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/reactions/delete.ts
@@ -0,0 +1,52 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import * as ms from 'ms';
+import deleteReaction from '@/services/note/reaction/delete';
+import { getNote } from '../../../common/getters';
+import { ApiError } from '../../../error';
+
+export const meta = {
+	tags: ['reactions', 'notes'],
+
+	requireCredential: true as const,
+
+	kind: 'write:reactions',
+
+	limit: {
+		duration: ms('1hour'),
+		max: 60,
+		minInterval: ms('3sec')
+	},
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '764d9fce-f9f2-4a0e-92b1-6ceac9a7ad37'
+		},
+
+		notReacted: {
+			message: 'You are not reacting to that note.',
+			code: 'NOT_REACTED',
+			id: '92f4426d-4196-4125-aa5b-02943e2ec8fc'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+	await deleteReaction(user, note).catch(e => {
+		if (e.id === '60527ec9-b4cb-4a88-a6bd-32d3ad26817d') throw new ApiError(meta.errors.notReacted);
+		throw e;
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/renotes.ts b/packages/backend/src/server/api/endpoints/notes/renotes.ts
new file mode 100644
index 0000000000..26bfc1657d
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/renotes.ts
@@ -0,0 +1,76 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { getNote } from '../../common/getters';
+import { ApiError } from '../../error';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { Notes } from '@/models/index';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		}
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '12908022-2e21-46cd-ba6a-3edaf6093f46'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'), ps.sinceId, ps.untilId)
+		.andWhere(`note.renoteId = :renoteId`, { renoteId: note.id })
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser');
+
+	generateVisibilityQuery(query, user);
+	if (user) generateMutedUserQuery(query, user);
+	if (user) generateBlockedUserQuery(query, user);
+
+	const renotes = await query.take(ps.limit!).getMany();
+
+	return await Notes.packMany(renotes, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/replies.ts b/packages/backend/src/server/api/endpoints/notes/replies.ts
new file mode 100644
index 0000000000..0bb62413ae
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/replies.ts
@@ -0,0 +1,61 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { Notes } from '@/models/index';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'), ps.sinceId, ps.untilId)
+		.andWhere('note.replyId = :replyId', { replyId: ps.noteId })
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser');
+
+	generateVisibilityQuery(query, user);
+	if (user) generateMutedUserQuery(query, user);
+	if (user) generateBlockedUserQuery(query, user);
+
+	const timeline = await query.take(ps.limit!).getMany();
+
+	return await Notes.packMany(timeline, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/search-by-tag.ts b/packages/backend/src/server/api/endpoints/notes/search-by-tag.ts
new file mode 100644
index 0000000000..40e1499736
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/search-by-tag.ts
@@ -0,0 +1,134 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { Notes } from '@/models/index';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { Brackets } from 'typeorm';
+import { safeForSql } from '@/misc/safe-for-sql';
+import { normalizeForSearch } from '@/misc/normalize-for-search';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes', 'hashtags'],
+
+	params: {
+		tag: {
+			validator: $.optional.str,
+		},
+
+		query: {
+			validator: $.optional.arr($.arr($.str)),
+		},
+
+		reply: {
+			validator: $.optional.nullable.bool,
+			default: null,
+		},
+
+		renote: {
+			validator: $.optional.nullable.bool,
+			default: null,
+		},
+
+		withFiles: {
+			validator: $.optional.bool,
+		},
+
+		poll: {
+			validator: $.optional.nullable.bool,
+			default: null,
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+};
+
+export default define(meta, async (ps, me) => {
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'), ps.sinceId, ps.untilId)
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser');
+
+	generateVisibilityQuery(query, me);
+	if (me) generateMutedUserQuery(query, me);
+	if (me) generateBlockedUserQuery(query, me);
+
+	try {
+		if (ps.tag) {
+			if (!safeForSql(ps.tag)) throw 'Injection';
+			query.andWhere(`'{"${normalizeForSearch(ps.tag)}"}' <@ note.tags`);
+		} else {
+			query.andWhere(new Brackets(qb => {
+				for (const tags of ps.query!) {
+					qb.orWhere(new Brackets(qb => {
+						for (const tag of tags) {
+							if (!safeForSql(tag)) throw 'Injection';
+							qb.andWhere(`'{"${normalizeForSearch(tag)}"}' <@ note.tags`);
+						}
+					}));
+				}
+			}));
+		}
+	} catch (e) {
+		if (e === 'Injection') return [];
+		throw e;
+	}
+
+	if (ps.reply != null) {
+		if (ps.reply) {
+			query.andWhere('note.replyId IS NOT NULL');
+		} else {
+			query.andWhere('note.replyId IS NULL');
+		}
+	}
+
+	if (ps.renote != null) {
+		if (ps.renote) {
+			query.andWhere('note.renoteId IS NOT NULL');
+		} else {
+			query.andWhere('note.renoteId IS NULL');
+		}
+	}
+
+	if (ps.withFiles) {
+		query.andWhere('note.fileIds != \'{}\'');
+	}
+
+	if (ps.poll != null) {
+		if (ps.poll) {
+			query.andWhere('note.hasPoll = TRUE');
+		} else {
+			query.andWhere('note.hasPoll = FALSE');
+		}
+	}
+
+	// Search notes
+	const notes = await query.take(ps.limit!).getMany();
+
+	return await Notes.packMany(notes, me);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/search.ts b/packages/backend/src/server/api/endpoints/notes/search.ts
new file mode 100644
index 0000000000..eb832a6b31
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/search.ts
@@ -0,0 +1,152 @@
+import $ from 'cafy';
+import es from '../../../../db/elasticsearch';
+import define from '../../define';
+import { Notes } from '@/models/index';
+import { In } from 'typeorm';
+import { ID } from '@/misc/cafy-id';
+import config from '@/config/index';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		query: {
+			validator: $.str
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		host: {
+			validator: $.optional.nullable.str,
+			default: undefined
+		},
+
+		userId: {
+			validator: $.optional.nullable.type(ID),
+			default: null
+		},
+
+		channelId: {
+			validator: $.optional.nullable.type(ID),
+			default: null
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+
+	errors: {
+	}
+};
+
+export default define(meta, async (ps, me) => {
+	if (es == null) {
+		const query = makePaginationQuery(Notes.createQueryBuilder('note'), ps.sinceId, ps.untilId);
+
+		if (ps.userId) {
+			query.andWhere('note.userId = :userId', { userId: ps.userId });
+		} else if (ps.channelId) {
+			query.andWhere('note.channelId = :channelId', { channelId: ps.channelId });
+		}
+
+		query
+			.andWhere('note.text ILIKE :q', { q: `%${ps.query}%` })
+			.innerJoinAndSelect('note.user', 'user')
+			.leftJoinAndSelect('note.reply', 'reply')
+			.leftJoinAndSelect('note.renote', 'renote')
+			.leftJoinAndSelect('reply.user', 'replyUser')
+			.leftJoinAndSelect('renote.user', 'renoteUser');
+
+		generateVisibilityQuery(query, me);
+		if (me) generateMutedUserQuery(query, me);
+		if (me) generateBlockedUserQuery(query, me);
+
+		const notes = await query.take(ps.limit!).getMany();
+
+		return await Notes.packMany(notes, me);
+	} else {
+		const userQuery = ps.userId != null ? [{
+			term: {
+				userId: ps.userId
+			}
+		}] : [];
+
+		const hostQuery = ps.userId == null ?
+			ps.host === null ? [{
+				bool: {
+					must_not: {
+						exists: {
+							field: 'userHost'
+						}
+					}
+				}
+			}] : ps.host !== undefined ? [{
+				term: {
+					userHost: ps.host
+				}
+			}] : []
+		: [];
+
+		const result = await es.search({
+			index: config.elasticsearch.index || 'misskey_note',
+			body: {
+				size: ps.limit!,
+				from: ps.offset,
+				query: {
+					bool: {
+						must: [{
+							simple_query_string: {
+								fields: ['text'],
+								query: ps.query.toLowerCase(),
+								default_operator: 'and'
+							},
+						}, ...hostQuery, ...userQuery]
+					}
+				},
+				sort: [{
+					_doc: 'desc'
+				}]
+			}
+		});
+
+		const hits = result.body.hits.hits.map((hit: any) => hit._id);
+
+		if (hits.length === 0) return [];
+
+		// Fetch found notes
+		const notes = await Notes.find({
+			where: {
+				id: In(hits)
+			},
+			order: {
+				id: -1
+			}
+		});
+
+		return await Notes.packMany(notes, me);
+	}
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/show.ts b/packages/backend/src/server/api/endpoints/notes/show.ts
new file mode 100644
index 0000000000..fad63d6483
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/show.ts
@@ -0,0 +1,43 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { getNote } from '../../common/getters';
+import { ApiError } from '../../error';
+import { Notes } from '@/models/index';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		ref: 'Note',
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '24fcbfc6-2e37-42b6-8388-c29b3861a08d'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	return await Notes.pack(note, user, {
+		detail: true
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/state.ts b/packages/backend/src/server/api/endpoints/notes/state.ts
new file mode 100644
index 0000000000..b3913a5e79
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/state.ts
@@ -0,0 +1,69 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { NoteFavorites, Notes, NoteThreadMutings, NoteWatchings } from '@/models/index';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		properties: {
+			isFavorited: {
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const
+			},
+			isWatching: {
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const
+			},
+			isMutedThread: {
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const
+			},
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await Notes.findOneOrFail(ps.noteId);
+
+	const [favorite, watching, threadMuting] = await Promise.all([
+		NoteFavorites.count({
+			where: {
+				userId: user.id,
+				noteId: note.id,
+			},
+			take: 1
+		}),
+		NoteWatchings.count({
+			where: {
+				userId: user.id,
+				noteId: note.id,
+			},
+			take: 1
+		}),
+		NoteThreadMutings.count({
+			where: {
+				userId: user.id,
+				threadId: note.threadId || note.id,
+			},
+			take: 1
+		}),
+	]);
+
+	return {
+		isFavorited: favorite !== 0,
+		isWatching: watching !== 0,
+		isMutedThread: threadMuting !== 0,
+	};
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/thread-muting/create.ts b/packages/backend/src/server/api/endpoints/notes/thread-muting/create.ts
new file mode 100644
index 0000000000..2010d54331
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/thread-muting/create.ts
@@ -0,0 +1,54 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { getNote } from '../../../common/getters';
+import { ApiError } from '../../../error';
+import { Notes, NoteThreadMutings } from '@/models';
+import { genId } from '@/misc/gen-id';
+import readNote from '@/services/note/read';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	kind: 'write:account',
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '5ff67ada-ed3b-2e71-8e87-a1a421e177d2'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	const mutedNotes = await Notes.find({
+		where: [{
+			id: note.threadId || note.id,
+		}, {
+			threadId: note.threadId || note.id,
+		}],
+	});
+
+	await readNote(user.id, mutedNotes);
+
+	await NoteThreadMutings.insert({
+		id: genId(),
+		createdAt: new Date(),
+		threadId: note.threadId || note.id,
+		userId: user.id,
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/thread-muting/delete.ts b/packages/backend/src/server/api/endpoints/notes/thread-muting/delete.ts
new file mode 100644
index 0000000000..05d5691870
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/thread-muting/delete.ts
@@ -0,0 +1,40 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { getNote } from '../../../common/getters';
+import { ApiError } from '../../../error';
+import { NoteThreadMutings } from '@/models';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	kind: 'write:account',
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: 'bddd57ac-ceb3-b29d-4334-86ea5fae481a'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	await NoteThreadMutings.delete({
+		threadId: note.threadId || note.id,
+		userId: user.id,
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/timeline.ts b/packages/backend/src/server/api/endpoints/notes/timeline.ts
new file mode 100644
index 0000000000..1bd0e57d34
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/timeline.ts
@@ -0,0 +1,150 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { Notes, Followings } from '@/models/index';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { generateMutedUserQuery } from '../../common/generate-muted-user-query';
+import { activeUsersChart } from '@/services/chart/index';
+import { Brackets } from 'typeorm';
+import { generateRepliesQuery } from '../../common/generate-replies-query';
+import { generateMutedNoteQuery } from '../../common/generate-muted-note-query';
+import { generateChannelQuery } from '../../common/generate-channel-query';
+import { generateBlockedUserQuery } from '../../common/generate-block-query';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	params: {
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10,
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		sinceDate: {
+			validator: $.optional.num,
+		},
+
+		untilDate: {
+			validator: $.optional.num,
+		},
+
+		includeMyRenotes: {
+			validator: $.optional.bool,
+			default: true,
+		},
+
+		includeRenotedMyNotes: {
+			validator: $.optional.bool,
+			default: true,
+		},
+
+		includeLocalRenotes: {
+			validator: $.optional.bool,
+			default: true,
+		},
+
+		withFiles: {
+			validator: $.optional.bool,
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const hasFollowing = (await Followings.count({
+		where: {
+			followerId: user.id,
+		},
+		take: 1
+	})) !== 0;
+
+	//#region Construct query
+	const followingQuery = Followings.createQueryBuilder('following')
+		.select('following.followeeId')
+		.where('following.followerId = :followerId', { followerId: user.id });
+
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'),
+			ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+		.andWhere(new Brackets(qb => { qb
+			.where('note.userId = :meId', { meId: user.id });
+			if (hasFollowing) qb.orWhere(`note.userId IN (${ followingQuery.getQuery() })`);
+		}))
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser')
+		.setParameters(followingQuery.getParameters());
+
+	generateChannelQuery(query, user);
+	generateRepliesQuery(query, user);
+	generateVisibilityQuery(query, user);
+	generateMutedUserQuery(query, user);
+	generateMutedNoteQuery(query, user);
+	generateBlockedUserQuery(query, user);
+
+	if (ps.includeMyRenotes === false) {
+		query.andWhere(new Brackets(qb => {
+			qb.orWhere('note.userId != :meId', { meId: user.id });
+			qb.orWhere('note.renoteId IS NULL');
+			qb.orWhere('note.text IS NOT NULL');
+			qb.orWhere('note.fileIds != \'{}\'');
+			qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+		}));
+	}
+
+	if (ps.includeRenotedMyNotes === false) {
+		query.andWhere(new Brackets(qb => {
+			qb.orWhere('note.renoteUserId != :meId', { meId: user.id });
+			qb.orWhere('note.renoteId IS NULL');
+			qb.orWhere('note.text IS NOT NULL');
+			qb.orWhere('note.fileIds != \'{}\'');
+			qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+		}));
+	}
+
+	if (ps.includeLocalRenotes === false) {
+		query.andWhere(new Brackets(qb => {
+			qb.orWhere('note.renoteUserHost IS NOT NULL');
+			qb.orWhere('note.renoteId IS NULL');
+			qb.orWhere('note.text IS NOT NULL');
+			qb.orWhere('note.fileIds != \'{}\'');
+			qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+		}));
+	}
+
+	if (ps.withFiles) {
+		query.andWhere('note.fileIds != \'{}\'');
+	}
+	//#endregion
+
+	const timeline = await query.take(ps.limit!).getMany();
+
+	process.nextTick(() => {
+		if (user) {
+			activeUsersChart.update(user);
+		}
+	});
+
+	return await Notes.packMany(timeline, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/translate.ts b/packages/backend/src/server/api/endpoints/notes/translate.ts
new file mode 100644
index 0000000000..b56b1debdd
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/translate.ts
@@ -0,0 +1,89 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { getNote } from '../../common/getters';
+import { ApiError } from '../../error';
+import fetch from 'node-fetch';
+import config from '@/config/index';
+import { getAgentByUrl } from '@/misc/fetch';
+import { URLSearchParams } from 'url';
+import { fetchMeta } from '@/misc/fetch-meta';
+import { Notes } from '@/models';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+		targetLang: {
+			validator: $.str,
+		},
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: 'bea9b03f-36e0-49c5-a4db-627a029f8971'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	if (!(await Notes.isVisibleForMe(note, user ? user.id : null))) {
+		return 204; // TODO: 良い感じのエラー返す
+	}
+
+	if (note.text == null) {
+		return 204;
+	}
+
+	const instance = await fetchMeta();
+
+	if (instance.deeplAuthKey == null) {
+		return 204; // TODO: 良い感じのエラー返す
+	}
+
+	let targetLang = ps.targetLang;
+	if (targetLang.includes('-')) targetLang = targetLang.split('-')[0];
+
+	const params = new URLSearchParams();
+	params.append('auth_key', instance.deeplAuthKey);
+	params.append('text', note.text);
+	params.append('target_lang', targetLang);
+
+	const endpoint = instance.deeplIsPro ? 'https://api.deepl.com/v2/translate' : 'https://api-free.deepl.com/v2/translate';
+
+	const res = await fetch(endpoint, {
+		method: 'POST',
+		headers: {
+			'Content-Type': 'application/x-www-form-urlencoded',
+			'User-Agent': config.userAgent,
+			Accept: 'application/json, */*'
+		},
+		body: params,
+		timeout: 10000,
+		agent: getAgentByUrl,
+	});
+
+	const json = await res.json();
+
+	return {
+		sourceLang: json.translations[0].detected_source_language,
+		text: json.translations[0].text
+	};
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/unrenote.ts b/packages/backend/src/server/api/endpoints/notes/unrenote.ts
new file mode 100644
index 0000000000..dce43d9d9c
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/unrenote.ts
@@ -0,0 +1,52 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import deleteNote from '@/services/note/delete';
+import define from '../../define';
+import * as ms from 'ms';
+import { getNote } from '../../common/getters';
+import { ApiError } from '../../error';
+import { Notes, Users } from '@/models/index';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	kind: 'write:notes',
+
+	limit: {
+		duration: ms('1hour'),
+		max: 300,
+		minInterval: ms('1sec')
+	},
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: 'efd4a259-2442-496b-8dd7-b255aa1a160f'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	const renotes = await Notes.find({
+		userId: user.id,
+		renoteId: note.id
+	});
+
+	for (const note of renotes) {
+		deleteNote(await Users.findOneOrFail(user.id), note);
+	}
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts b/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts
new file mode 100644
index 0000000000..32c370004c
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts
@@ -0,0 +1,147 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { ApiError } from '../../error';
+import { UserLists, UserListJoinings, Notes } from '@/models/index';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+import { generateVisibilityQuery } from '../../common/generate-visibility-query';
+import { activeUsersChart } from '@/services/chart/index';
+import { Brackets } from 'typeorm';
+
+export const meta = {
+	tags: ['notes', 'lists'],
+
+	requireCredential: true as const,
+
+	params: {
+		listId: {
+			validator: $.type(ID),
+		},
+
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10,
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		sinceDate: {
+			validator: $.optional.num,
+		},
+
+		untilDate: {
+			validator: $.optional.num,
+		},
+
+		includeMyRenotes: {
+			validator: $.optional.bool,
+			default: true,
+		},
+
+		includeRenotedMyNotes: {
+			validator: $.optional.bool,
+			default: true,
+		},
+
+		includeLocalRenotes: {
+			validator: $.optional.bool,
+			default: true,
+		},
+
+		withFiles: {
+			validator: $.optional.bool,
+		},
+	},
+
+	res: {
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
+		items: {
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
+			ref: 'Note',
+		}
+	},
+
+	errors: {
+		noSuchList: {
+			message: 'No such list.',
+			code: 'NO_SUCH_LIST',
+			id: '8fb1fbd5-e476-4c37-9fb0-43d55b63a2ff'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const list = await UserLists.findOne({
+		id: ps.listId,
+		userId: user.id
+	});
+
+	if (list == null) {
+		throw new ApiError(meta.errors.noSuchList);
+	}
+
+	//#region Construct query
+	const listQuery = UserListJoinings.createQueryBuilder('joining')
+		.select('joining.userId')
+		.where('joining.userListId = :userListId', { userListId: list.id });
+
+	const query = makePaginationQuery(Notes.createQueryBuilder('note'), ps.sinceId, ps.untilId)
+		.andWhere(`note.userId IN (${ listQuery.getQuery() })`)
+		.innerJoinAndSelect('note.user', 'user')
+		.leftJoinAndSelect('note.reply', 'reply')
+		.leftJoinAndSelect('note.renote', 'renote')
+		.leftJoinAndSelect('reply.user', 'replyUser')
+		.leftJoinAndSelect('renote.user', 'renoteUser')
+		.setParameters(listQuery.getParameters());
+
+	generateVisibilityQuery(query, user);
+
+	if (ps.includeMyRenotes === false) {
+		query.andWhere(new Brackets(qb => {
+			qb.orWhere('note.userId != :meId', { meId: user.id });
+			qb.orWhere('note.renoteId IS NULL');
+			qb.orWhere('note.text IS NOT NULL');
+			qb.orWhere('note.fileIds != \'{}\'');
+			qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+		}));
+	}
+
+	if (ps.includeRenotedMyNotes === false) {
+		query.andWhere(new Brackets(qb => {
+			qb.orWhere('note.renoteUserId != :meId', { meId: user.id });
+			qb.orWhere('note.renoteId IS NULL');
+			qb.orWhere('note.text IS NOT NULL');
+			qb.orWhere('note.fileIds != \'{}\'');
+			qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+		}));
+	}
+
+	if (ps.includeLocalRenotes === false) {
+		query.andWhere(new Brackets(qb => {
+			qb.orWhere('note.renoteUserHost IS NOT NULL');
+			qb.orWhere('note.renoteId IS NULL');
+			qb.orWhere('note.text IS NOT NULL');
+			qb.orWhere('note.fileIds != \'{}\'');
+			qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+		}));
+	}
+
+	if (ps.withFiles) {
+		query.andWhere('note.fileIds != \'{}\'');
+	}
+	//#endregion
+
+	const timeline = await query.take(ps.limit!).getMany();
+
+	activeUsersChart.update(user);
+
+	return await Notes.packMany(timeline, user);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/watching/create.ts b/packages/backend/src/server/api/endpoints/notes/watching/create.ts
new file mode 100644
index 0000000000..4d182d3715
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/watching/create.ts
@@ -0,0 +1,37 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import watch from '@/services/note/watch';
+import { getNote } from '../../../common/getters';
+import { ApiError } from '../../../error';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	kind: 'write:account',
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: 'ea0e37a6-90a3-4f58-ba6b-c328ca206fc7'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	await watch(user.id, note);
+});
diff --git a/packages/backend/src/server/api/endpoints/notes/watching/delete.ts b/packages/backend/src/server/api/endpoints/notes/watching/delete.ts
new file mode 100644
index 0000000000..dd58c52b57
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/watching/delete.ts
@@ -0,0 +1,37 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import unwatch from '@/services/note/unwatch';
+import { getNote } from '../../../common/getters';
+import { ApiError } from '../../../error';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: true as const,
+
+	kind: 'write:account',
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: '09b3695c-f72c-4731-a428-7cff825fc82e'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	await unwatch(user.id, note);
+});