Create BookmarkFolder Model

https://youtrack.weseek.co.jp/issue/GW-7833
- Create BookmarkFolder Model
- Add createBookmarkFolder method

packages/app/src/server/models/bookmark-folder.ts

@@ -0,0 +1,31 @@
+import { Ref, IUser, IUserHasId } from '@growi/core';
+
+import {  Model, Schema, Document } from 'mongoose';
+import { getOrCreateModel } from '../util/mongoose-utils';
+
+export interface BookmarkFolderDocument extends Document {
+  name : string,
+  owner: Ref<IUser>,
+  parent?: BookmarkFolderDocument
+}
+
+export type BookmarkFolderModel = Model<BookmarkFolderDocument>
+
+const bookmarkFolderSchema = new Schema<BookmarkFolderDocument, BookmarkFolderModel>({
+  name: {type: String},
+  owner: { type: Schema.Types.ObjectId, ref: 'User'},
+  parent: { type: Schema.Types.ObjectId, ref: 'BookmarkFolder', required: false}
+});
+
+bookmarkFolderSchema.statics.createBookmarkFolder = async function (name: string, user:IUserHasId, parent?: BookmarkFolderDocument ): Promise<BookmarkFolderDocument> {
+  const BookmarkFolder = this;
+  const bookmarkFolder = new BookmarkFolder();
+  bookmarkFolder.name = name;
+  bookmarkFolder.owner = user._id;
+  if(parent != null ){
+    bookmarkFolder.parent = parent._id;
+  }
+  return bookmarkFolder.save()
+}
+
+export default getOrCreateModel<BookmarkFolderDocument, BookmarkFolderModel>('BookmarkFolder', bookmarkFolderSchema)