refactoring

Resolve #7779

17 files changed, 1107 insertions, 0 deletions

diff --git a/packages/backend/src/server/api/endpoints/drive/files.ts b/packages/backend/src/server/api/endpoints/drive/files.ts
new file mode 100644
index 0000000000..95435e1e43
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files.ts
@@ -0,0 +1,70 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { DriveFiles } from '@/models/index';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'read:drive',
+
+	params: {
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		folderId: {
+			validator: $.optional.nullable.type(ID),
+			default: null,
+		},
+
+		type: {
+			validator: $.optional.nullable.str.match(/^[a-zA-Z\/\-*]+$/)
+		}
+	},
+
+	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: 'DriveFile',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const query = makePaginationQuery(DriveFiles.createQueryBuilder('file'), ps.sinceId, ps.untilId)
+		.andWhere('file.userId = :userId', { userId: user.id });
+
+	if (ps.folderId) {
+		query.andWhere('file.folderId = :folderId', { folderId: ps.folderId });
+	} else {
+		query.andWhere('file.folderId IS NULL');
+	}
+
+	if (ps.type) {
+		if (ps.type.endsWith('/*')) {
+			query.andWhere('file.type like :type', { type: ps.type.replace('/*', '/') + '%' });
+		} else {
+			query.andWhere('file.type = :type', { type: ps.type });
+		}
+	}
+
+	const files = await query.take(ps.limit!).getMany();
+
+	return await DriveFiles.packMany(files, { detail: false, self: true });
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/files/attached-notes.ts b/packages/backend/src/server/api/endpoints/drive/files/attached-notes.ts
new file mode 100644
index 0000000000..eec7d7877e
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files/attached-notes.ts
@@ -0,0 +1,57 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { DriveFiles, Notes } from '@/models/index';
+
+export const meta = {
+	tags: ['drive', 'notes'],
+
+	requireCredential: true as const,
+
+	kind: 'read:drive',
+
+	params: {
+		fileId: {
+			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: {
+		noSuchFile: {
+			message: 'No such file.',
+			code: 'NO_SUCH_FILE',
+			id: 'c118ece3-2e4b-4296-99d1-51756e32d232',
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	// Fetch file
+	const file = await DriveFiles.findOne({
+		id: ps.fileId,
+		userId: user.id,
+	});
+
+	if (file == null) {
+		throw new ApiError(meta.errors.noSuchFile);
+	}
+
+	const notes = await Notes.createQueryBuilder('note')
+		.where(':file = ANY(note.fileIds)', { file: file.id })
+		.getMany();
+
+	return await Notes.packMany(notes, user, {
+		detail: true
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts b/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts
new file mode 100644
index 0000000000..2c36078421
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts
@@ -0,0 +1,31 @@
+import $ from 'cafy';
+import define from '../../../define';
+import { DriveFiles } from '@/models/index';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'read:drive',
+
+	params: {
+		md5: {
+			validator: $.str,
+		}
+	},
+
+	res: {
+		type: 'boolean' as const,
+		optional: false as const, nullable: false as const,
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const file = await DriveFiles.findOne({
+		md5: ps.md5,
+		userId: user.id,
+	});
+
+	return file != null;
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/files/create.ts b/packages/backend/src/server/api/endpoints/drive/files/create.ts
new file mode 100644
index 0000000000..2abc104e6c
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files/create.ts
@@ -0,0 +1,89 @@
+import * as ms from 'ms';
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import create from '@/services/drive/add-file';
+import define from '../../../define';
+import { apiLogger } from '../../../logger';
+import { ApiError } from '../../../error';
+import { DriveFiles } from '@/models/index';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	limit: {
+		duration: ms('1hour'),
+		max: 120
+	},
+
+	requireFile: true,
+
+	kind: 'write:drive',
+
+	params: {
+		folderId: {
+			validator: $.optional.nullable.type(ID),
+			default: null,
+		},
+
+		name: {
+			validator: $.optional.nullable.str,
+			default: null,
+		},
+
+		isSensitive: {
+			validator: $.optional.either($.bool, $.str),
+			default: false,
+			transform: (v: any): boolean => v === true || v === 'true',
+		},
+
+		force: {
+			validator: $.optional.either($.bool, $.str),
+			default: false,
+			transform: (v: any): boolean => v === true || v === 'true',
+		}
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		ref: 'DriveFile',
+	},
+
+	errors: {
+		invalidFileName: {
+			message: 'Invalid file name.',
+			code: 'INVALID_FILE_NAME',
+			id: 'f449b209-0c60-4e51-84d5-29486263bfd4'
+		}
+	}
+};
+
+export default define(meta, async (ps, user, _, file, cleanup) => {
+	// Get 'name' parameter
+	let name = ps.name || file.originalname;
+	if (name !== undefined && name !== null) {
+		name = name.trim();
+		if (name.length === 0) {
+			name = null;
+		} else if (name === 'blob') {
+			name = null;
+		} else if (!DriveFiles.validateFileName(name)) {
+			throw new ApiError(meta.errors.invalidFileName);
+		}
+	} else {
+		name = null;
+	}
+
+	try {
+		// Create file
+		const driveFile = await create(user, file.path, name, null, ps.folderId, ps.force, false, null, null, ps.isSensitive);
+		return await DriveFiles.pack(driveFile, { self: true });
+	} catch (e) {
+		apiLogger.error(e);
+		throw new ApiError();
+	} finally {
+		cleanup!();
+	}
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/files/delete.ts b/packages/backend/src/server/api/endpoints/drive/files/delete.ts
new file mode 100644
index 0000000000..038325694d
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files/delete.ts
@@ -0,0 +1,53 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import { deleteFile } from '@/services/drive/delete-file';
+import { publishDriveStream } from '@/services/stream';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { DriveFiles } from '@/models/index';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'write:drive',
+
+	params: {
+		fileId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchFile: {
+			message: 'No such file.',
+			code: 'NO_SUCH_FILE',
+			id: '908939ec-e52b-4458-b395-1025195cea58'
+		},
+
+		accessDenied: {
+			message: 'Access denied.',
+			code: 'ACCESS_DENIED',
+			id: '5eb8d909-2540-4970-90b8-dd6f86088121'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const file = await DriveFiles.findOne(ps.fileId);
+
+	if (file == null) {
+		throw new ApiError(meta.errors.noSuchFile);
+	}
+
+	if (!user.isAdmin && !user.isModerator && (file.userId !== user.id)) {
+		throw new ApiError(meta.errors.accessDenied);
+	}
+
+	// Delete
+	await deleteFile(file);
+
+	// Publish fileDeleted event
+	publishDriveStream(user.id, 'fileDeleted', file.id);
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/files/find-by-hash.ts b/packages/backend/src/server/api/endpoints/drive/files/find-by-hash.ts
new file mode 100644
index 0000000000..5fea7bbbb0
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files/find-by-hash.ts
@@ -0,0 +1,36 @@
+import $ from 'cafy';
+import define from '../../../define';
+import { DriveFiles } from '@/models/index';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'read:drive',
+
+	params: {
+		md5: {
+			validator: $.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: 'DriveFile',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const files = await DriveFiles.find({
+		md5: ps.md5,
+		userId: user.id,
+	});
+
+	return await DriveFiles.packMany(files, { self: true });
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/files/find.ts b/packages/backend/src/server/api/endpoints/drive/files/find.ts
new file mode 100644
index 0000000000..dd419f4c04
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files/find.ts
@@ -0,0 +1,43 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { DriveFiles } from '@/models/index';
+
+export const meta = {
+	requireCredential: true as const,
+
+	tags: ['drive'],
+
+	kind: 'read:drive',
+
+	params: {
+		name: {
+			validator: $.str
+		},
+
+		folderId: {
+			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: 'DriveFile',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const files = await DriveFiles.find({
+		name: ps.name,
+		userId: user.id,
+		folderId: ps.folderId
+	});
+
+	return await Promise.all(files.map(file => DriveFiles.pack(file, { self: true })));
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/files/show.ts b/packages/backend/src/server/api/endpoints/drive/files/show.ts
new file mode 100644
index 0000000000..a96ebaa123
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files/show.ts
@@ -0,0 +1,84 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { DriveFile } from '@/models/entities/drive-file';
+import { DriveFiles } from '@/models/index';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'read:drive',
+
+	params: {
+		fileId: {
+			validator: $.optional.type(ID),
+		},
+
+		url: {
+			validator: $.optional.str,
+		}
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		ref: 'DriveFile',
+	},
+
+	errors: {
+		noSuchFile: {
+			message: 'No such file.',
+			code: 'NO_SUCH_FILE',
+			id: '067bc436-2718-4795-b0fb-ecbe43949e31'
+		},
+
+		accessDenied: {
+			message: 'Access denied.',
+			code: 'ACCESS_DENIED',
+			id: '25b73c73-68b1-41d0-bad1-381cfdf6579f'
+		},
+
+		fileIdOrUrlRequired: {
+			message: 'fileId or url required.',
+			code: 'INVALID_PARAM',
+			id: '89674805-722c-440c-8d88-5641830dc3e4'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	let file: DriveFile | undefined;
+
+	if (ps.fileId) {
+		file = await DriveFiles.findOne(ps.fileId);
+	} else if (ps.url) {
+		file = await DriveFiles.findOne({
+			where: [{
+				url: ps.url
+			}, {
+				webpublicUrl: ps.url
+			}, {
+				thumbnailUrl: ps.url
+			}],
+		});
+	} else {
+		throw new ApiError(meta.errors.fileIdOrUrlRequired);
+	}
+
+	if (file == null) {
+		throw new ApiError(meta.errors.noSuchFile);
+	}
+
+	if (!user.isAdmin && !user.isModerator && (file.userId !== user.id)) {
+		throw new ApiError(meta.errors.accessDenied);
+	}
+
+	return await DriveFiles.pack(file, {
+		detail: true,
+		withUser: true,
+		self: true
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/files/update.ts b/packages/backend/src/server/api/endpoints/drive/files/update.ts
new file mode 100644
index 0000000000..f277a9c3dc
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files/update.ts
@@ -0,0 +1,116 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import { publishDriveStream } from '@/services/stream';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { DriveFiles, DriveFolders } from '@/models/index';
+import { DB_MAX_IMAGE_COMMENT_LENGTH } from '@/misc/hard-limits';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'write:drive',
+
+	params: {
+		fileId: {
+			validator: $.type(ID),
+		},
+
+		folderId: {
+			validator: $.optional.nullable.type(ID),
+			default: undefined as any,
+		},
+
+		name: {
+			validator: $.optional.str.pipe(DriveFiles.validateFileName),
+			default: undefined as any,
+		},
+
+		isSensitive: {
+			validator: $.optional.bool,
+			default: undefined as any,
+		},
+
+		comment: {
+			validator: $.optional.nullable.str.max(DB_MAX_IMAGE_COMMENT_LENGTH),
+			default: undefined as any,
+		}
+	},
+
+	errors: {
+		noSuchFile: {
+			message: 'No such file.',
+			code: 'NO_SUCH_FILE',
+			id: 'e7778c7e-3af9-49cd-9690-6dbc3e6c972d'
+		},
+
+		accessDenied: {
+			message: 'Access denied.',
+			code: 'ACCESS_DENIED',
+			id: '01a53b27-82fc-445b-a0c1-b558465a8ed2'
+		},
+
+		noSuchFolder: {
+			message: 'No such folder.',
+			code: 'NO_SUCH_FOLDER',
+			id: 'ea8fb7a5-af77-4a08-b608-c0218176cd73'
+		},
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		ref: 'DriveFile'
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const file = await DriveFiles.findOne(ps.fileId);
+
+	if (file == null) {
+		throw new ApiError(meta.errors.noSuchFile);
+	}
+
+	if (!user.isAdmin && !user.isModerator && (file.userId !== user.id)) {
+		throw new ApiError(meta.errors.accessDenied);
+	}
+
+	if (ps.name) file.name = ps.name;
+
+	if (ps.comment !== undefined) file.comment = ps.comment;
+
+	if (ps.isSensitive !== undefined) file.isSensitive = ps.isSensitive;
+
+	if (ps.folderId !== undefined) {
+		if (ps.folderId === null) {
+			file.folderId = null;
+		} else {
+			const folder = await DriveFolders.findOne({
+				id: ps.folderId,
+				userId: user.id
+			});
+
+			if (folder == null) {
+				throw new ApiError(meta.errors.noSuchFolder);
+			}
+
+			file.folderId = folder.id;
+		}
+	}
+
+	await DriveFiles.update(file.id, {
+		name: file.name,
+		comment: file.comment,
+		folderId: file.folderId,
+		isSensitive: file.isSensitive
+	});
+
+	const fileObj = await DriveFiles.pack(file, { self: true });
+
+	// Publish fileUpdated event
+	publishDriveStream(user.id, 'fileUpdated', fileObj);
+
+	return fileObj;
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/files/upload-from-url.ts b/packages/backend/src/server/api/endpoints/drive/files/upload-from-url.ts
new file mode 100644
index 0000000000..9f10a42d24
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/files/upload-from-url.ts
@@ -0,0 +1,64 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import * as ms from 'ms';
+import uploadFromUrl from '@/services/drive/upload-from-url';
+import define from '../../../define';
+import { DriveFiles } from '@/models/index';
+import { publishMainStream } from '@/services/stream';
+import { DB_MAX_IMAGE_COMMENT_LENGTH } from '@/misc/hard-limits';
+
+export const meta = {
+	tags: ['drive'],
+
+	limit: {
+		duration: ms('1hour'),
+		max: 60
+	},
+
+	requireCredential: true as const,
+
+	kind: 'write:drive',
+
+	params: {
+		url: {
+			// TODO: Validate this url
+			validator: $.str,
+		},
+
+		folderId: {
+			validator: $.optional.nullable.type(ID),
+			default: null,
+		},
+
+		isSensitive: {
+			validator: $.optional.bool,
+			default: false,
+		},
+
+		comment: {
+			validator: $.optional.nullable.str.max(DB_MAX_IMAGE_COMMENT_LENGTH),
+			default: null,
+		},
+
+		marker: {
+			validator: $.optional.nullable.str,
+			default: null,
+		},
+
+		force: {
+			validator: $.optional.bool,
+			default: false,
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	uploadFromUrl(ps.url, user, ps.folderId, null, ps.isSensitive, ps.force, false, ps.comment).then(file => {
+		DriveFiles.pack(file, { self: true }).then(packedFile => {
+			publishMainStream(user.id, 'urlUploadFinished', {
+				marker: ps.marker,
+				file: packedFile
+			});
+		});
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/folders.ts b/packages/backend/src/server/api/endpoints/drive/folders.ts
new file mode 100644
index 0000000000..6f16878b13
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/folders.ts
@@ -0,0 +1,58 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { DriveFolders } from '@/models/index';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'read:drive',
+
+	params: {
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		folderId: {
+			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: 'DriveFolder',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const query = makePaginationQuery(DriveFolders.createQueryBuilder('folder'), ps.sinceId, ps.untilId)
+		.andWhere('folder.userId = :userId', { userId: user.id });
+
+	if (ps.folderId) {
+		query.andWhere('folder.parentId = :parentId', { parentId: ps.folderId });
+	} else {
+		query.andWhere('folder.parentId IS NULL');
+	}
+
+	const folders = await query.take(ps.limit!).getMany();
+
+	return await Promise.all(folders.map(folder => DriveFolders.pack(folder)));
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/folders/create.ts b/packages/backend/src/server/api/endpoints/drive/folders/create.ts
new file mode 100644
index 0000000000..80f96bd641
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/folders/create.ts
@@ -0,0 +1,72 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import { publishDriveStream } from '@/services/stream';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { DriveFolders } from '@/models/index';
+import { genId } from '@/misc/gen-id';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'write:drive',
+
+	params: {
+		name: {
+			validator: $.optional.str.pipe(DriveFolders.validateFolderName),
+			default: 'Untitled',
+		},
+
+		parentId: {
+			validator: $.optional.nullable.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchFolder: {
+			message: 'No such folder.',
+			code: 'NO_SUCH_FOLDER',
+			id: '53326628-a00d-40a6-a3cd-8975105c0f95'
+		},
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		ref: 'DriveFolder'
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	// If the parent folder is specified
+	let parent = null;
+	if (ps.parentId) {
+		// Fetch parent folder
+		parent = await DriveFolders.findOne({
+			id: ps.parentId,
+			userId: user.id
+		});
+
+		if (parent == null) {
+			throw new ApiError(meta.errors.noSuchFolder);
+		}
+	}
+
+	// Create folder
+	const folder = await DriveFolders.insert({
+		id: genId(),
+		createdAt: new Date(),
+		name: ps.name,
+		parentId: parent !== null ? parent.id : null,
+		userId: user.id
+	}).then(x => DriveFolders.findOneOrFail(x.identifiers[0]));
+
+	const folderObj = await DriveFolders.pack(folder);
+
+	// Publish folderCreated event
+	publishDriveStream(user.id, 'folderCreated', folderObj);
+
+	return folderObj;
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/folders/delete.ts b/packages/backend/src/server/api/endpoints/drive/folders/delete.ts
new file mode 100644
index 0000000000..38b4aef103
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/folders/delete.ts
@@ -0,0 +1,60 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { publishDriveStream } from '@/services/stream';
+import { ApiError } from '../../../error';
+import { DriveFolders, DriveFiles } from '@/models/index';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'write:drive',
+
+	params: {
+		folderId: {
+			validator: $.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchFolder: {
+			message: 'No such folder.',
+			code: 'NO_SUCH_FOLDER',
+			id: '1069098f-c281-440f-b085-f9932edbe091'
+		},
+
+		hasChildFilesOrFolders: {
+			message: 'This folder has child files or folders.',
+			code: 'HAS_CHILD_FILES_OR_FOLDERS',
+			id: 'b0fc8a17-963c-405d-bfbc-859a487295e1'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	// Get folder
+	const folder = await DriveFolders.findOne({
+		id: ps.folderId,
+		userId: user.id
+	});
+
+	if (folder == null) {
+		throw new ApiError(meta.errors.noSuchFolder);
+	}
+
+	const [childFoldersCount, childFilesCount] = await Promise.all([
+		DriveFolders.count({ parentId: folder.id }),
+		DriveFiles.count({ folderId: folder.id })
+	]);
+
+	if (childFoldersCount !== 0 || childFilesCount !== 0) {
+		throw new ApiError(meta.errors.hasChildFilesOrFolders);
+	}
+
+	await DriveFolders.delete(folder.id);
+
+	// Publish folderCreated event
+	publishDriveStream(user.id, 'folderDeleted', folder.id);
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/folders/find.ts b/packages/backend/src/server/api/endpoints/drive/folders/find.ts
new file mode 100644
index 0000000000..a6c5a49988
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/folders/find.ts
@@ -0,0 +1,43 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { DriveFolders } from '@/models/index';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'read:drive',
+
+	params: {
+		name: {
+			validator: $.str
+		},
+
+		parentId: {
+			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: 'DriveFolder',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const folders = await DriveFolders.find({
+		name: ps.name,
+		userId: user.id,
+		parentId: ps.parentId
+	});
+
+	return await Promise.all(folders.map(folder => DriveFolders.pack(folder)));
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/folders/show.ts b/packages/backend/src/server/api/endpoints/drive/folders/show.ts
new file mode 100644
index 0000000000..e907a24f05
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/folders/show.ts
@@ -0,0 +1,49 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { DriveFolders } from '@/models/index';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'read:drive',
+
+	params: {
+		folderId: {
+			validator: $.type(ID),
+		}
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		ref: 'DriveFolder',
+	},
+
+	errors: {
+		noSuchFolder: {
+			message: 'No such folder.',
+			code: 'NO_SUCH_FOLDER',
+			id: 'd74ab9eb-bb09-4bba-bf24-fb58f761e1e9'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	// Get folder
+	const folder = await DriveFolders.findOne({
+		id: ps.folderId,
+		userId: user.id
+	});
+
+	if (folder == null) {
+		throw new ApiError(meta.errors.noSuchFolder);
+	}
+
+	return await DriveFolders.pack(folder, {
+		detail: true
+	});
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/folders/update.ts b/packages/backend/src/server/api/endpoints/drive/folders/update.ts
new file mode 100644
index 0000000000..612252e6df
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/folders/update.ts
@@ -0,0 +1,123 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import { publishDriveStream } from '@/services/stream';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { DriveFolders } from '@/models/index';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'write:drive',
+
+	params: {
+		folderId: {
+			validator: $.type(ID),
+		},
+
+		name: {
+			validator: $.optional.str.pipe(DriveFolders.validateFolderName),
+		},
+
+		parentId: {
+			validator: $.optional.nullable.type(ID),
+		}
+	},
+
+	errors: {
+		noSuchFolder: {
+			message: 'No such folder.',
+			code: 'NO_SUCH_FOLDER',
+			id: 'f7974dac-2c0d-4a27-926e-23583b28e98e'
+		},
+
+		noSuchParentFolder: {
+			message: 'No such parent folder.',
+			code: 'NO_SUCH_PARENT_FOLDER',
+			id: 'ce104e3a-faaf-49d5-b459-10ff0cbbcaa1'
+		},
+
+		recursiveNesting: {
+			message: 'It can not be structured like nesting folders recursively.',
+			code: 'NO_SUCH_PARENT_FOLDER',
+			id: 'ce104e3a-faaf-49d5-b459-10ff0cbbcaa1'
+		},
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		ref: 'DriveFolder'
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	// Fetch folder
+	const folder = await DriveFolders.findOne({
+		id: ps.folderId,
+		userId: user.id
+	});
+
+	if (folder == null) {
+		throw new ApiError(meta.errors.noSuchFolder);
+	}
+
+	if (ps.name) folder.name = ps.name;
+
+	if (ps.parentId !== undefined) {
+		if (ps.parentId === folder.id) {
+			throw new ApiError(meta.errors.recursiveNesting);
+		} else if (ps.parentId === null) {
+			folder.parentId = null;
+		} else {
+			// Get parent folder
+			const parent = await DriveFolders.findOne({
+				id: ps.parentId,
+				userId: user.id
+			});
+
+			if (parent == null) {
+				throw new ApiError(meta.errors.noSuchParentFolder);
+			}
+
+			// Check if the circular reference will occur
+			async function checkCircle(folderId: any): Promise<boolean> {
+				// Fetch folder
+				const folder2 = await DriveFolders.findOne({
+					id: folderId
+				});
+
+				if (folder2!.id === folder!.id) {
+					return true;
+				} else if (folder2!.parentId) {
+					return await checkCircle(folder2!.parentId);
+				} else {
+					return false;
+				}
+			}
+
+			if (parent.parentId !== null) {
+				if (await checkCircle(parent.parentId)) {
+					throw new ApiError(meta.errors.recursiveNesting);
+				}
+			}
+
+			folder.parentId = parent.id;
+		}
+	}
+
+	// Update
+	DriveFolders.update(folder.id, {
+		name: folder.name,
+		parentId: folder.parentId
+	});
+
+	const folderObj = await DriveFolders.pack(folder);
+
+	// Publish folderUpdated event
+	publishDriveStream(user.id, 'folderUpdated', folderObj);
+
+	return folderObj;
+});
diff --git a/packages/backend/src/server/api/endpoints/drive/stream.ts b/packages/backend/src/server/api/endpoints/drive/stream.ts
new file mode 100644
index 0000000000..141e02f748
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/drive/stream.ts
@@ -0,0 +1,59 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { DriveFiles } from '@/models/index';
+import { makePaginationQuery } from '../../common/make-pagination-query';
+
+export const meta = {
+	tags: ['drive'],
+
+	requireCredential: true as const,
+
+	kind: 'read:drive',
+
+	params: {
+		limit: {
+			validator: $.optional.num.range(1, 100),
+			default: 10
+		},
+
+		sinceId: {
+			validator: $.optional.type(ID),
+		},
+
+		untilId: {
+			validator: $.optional.type(ID),
+		},
+
+		type: {
+			validator: $.optional.str.match(/^[a-zA-Z\/\-*]+$/)
+		}
+	},
+
+	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: 'DriveFile',
+		}
+	},
+};
+
+export default define(meta, async (ps, user) => {
+	const query = makePaginationQuery(DriveFiles.createQueryBuilder('file'), ps.sinceId, ps.untilId)
+		.andWhere('file.userId = :userId', { userId: user.id });
+
+	if (ps.type) {
+		if (ps.type.endsWith('/*')) {
+			query.andWhere('file.type like :type', { type: ps.type.replace('/*', '/') + '%' });
+		} else {
+			query.andWhere('file.type = :type', { type: ps.type });
+		}
+	}
+
+	const files = await query.take(ps.limit!).getMany();
+
+	return await DriveFiles.packMany(files, { detail: false, self: true });
+});