Introduce processor

src/server/api/endpoints/drive/folders/update.ts

@@ -0,0 +1,99 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import DriveFolder, { isValidFolderName, pack } from '../../../models/drive-folder';
+import { publishDriveStream } from '../../../event';
+
+/**
+ * Update a folder
+ *
+ * @param {any} params
+ * @param {any} user
+ * @return {Promise<any>}
+ */
+module.exports = (params, user) => new Promise(async (res, rej) => {
+	// Get 'folder_id' parameter
+	const [folderId, folderIdErr] = $(params.folder_id).id().$;
+	if (folderIdErr) return rej('invalid folder_id param');
+
+	// Fetch folder
+	const folder = await DriveFolder
+		.findOne({
+			_id: folderId,
+			user_id: user._id
+		});
+
+	if (folder === null) {
+		return rej('folder-not-found');
+	}
+
+	// Get 'name' parameter
+	const [name, nameErr] = $(params.name).optional.string().pipe(isValidFolderName).$;
+	if (nameErr) return rej('invalid name param');
+	if (name) folder.name = name;
+
+	// Get 'parent_id' parameter
+	const [parentId, parentIdErr] = $(params.parent_id).optional.nullable.id().$;
+	if (parentIdErr) return rej('invalid parent_id param');
+	if (parentId !== undefined) {
+		if (parentId === null) {
+			folder.parent_id = null;
+		} else {
+			// Get parent folder
+			const parent = await DriveFolder
+				.findOne({
+					_id: parentId,
+					user_id: user._id
+				});
+
+			if (parent === null) {
+				return rej('parent-folder-not-found');
+			}
+
+			// Check if the circular reference will occur
+			async function checkCircle(folderId) {
+				// Fetch folder
+				const folder2 = await DriveFolder.findOne({
+					_id: folderId
+				}, {
+					_id: true,
+					parent_id: true
+				});
+
+				if (folder2._id.equals(folder._id)) {
+					return true;
+				} else if (folder2.parent_id) {
+					return await checkCircle(folder2.parent_id);
+				} else {
+					return false;
+				}
+			}
+
+			if (parent.parent_id !== null) {
+				if (await checkCircle(parent.parent_id)) {
+					return rej('detected-circular-definition');
+				}
+			}
+
+			folder.parent_id = parent._id;
+		}
+	}
+
+	// Update
+	DriveFolder.update(folder._id, {
+		$set: {
+			name: folder.name,
+			parent_id: folder.parent_id
+		}
+	});
+
+	// Serialize
+	const folderObj = await pack(folder);
+
+	// Response
+	res(folderObj);
+
+	// Publish folder_updated event
+	publishDriveStream(user._id, 'folder_updated', folderObj);
+});