requested changes. Code improvements

src/controllers/pagesOrder.js

@@ -1,12 +1,17 @@
-const Model = require('../models/pageChildrenOrder');
+const Model = require('../models/pageOrder');
 
 /**
- * @class PagesChildrenOrder
- * @classdesc PagesChildrenOrder controller
+ * @class PagesOrder
+ * @classdesc PagesOrder controller
+ *
+ * Manipulates with Pages: changes the order, deletes, updates and so on...
  */
-class PagesChildrenOrder {
+class PagesOrder {
   /**
-   * @param parentId
+   * Returns Page's order
+   *
+   * @param {string} parentId - of which page we want to get children order
+   * @returns {Promise<PageOrder>}
    */
   static async get(parentId) {
     const order = await Model.get(parentId);
@@ -19,46 +24,53 @@ class PagesChildrenOrder {
   }
 
   /**
-   * @param parentId
-   * @param childId
-   * @return {Promise<void>}
+   * Pushes the child page to the parent's order list
+   *
+   * @param {string} parentId - parent page's id
+   * @param {string} childId - new page pushed to the order
    */
   static async push(parentId, childId) {
     const order = await Model.get(parentId);
 
-    order.pushChild(childId);
+    order.push(childId);
     await order.save();
   }
 
   /**
    * Move one page to another Page's order
+   *
+   * @param {string} oldParentId - old parent page's id
+   * @param {string} newParentId - new parent page's id
+   * @param {string} childId - page's id which is changing the parent page
    */
   static async renew(oldParentId, newParentId, childId) {
     const oldParentOrder = await Model.get(oldParentId);
 
-    oldParentOrder.removeChild(childId);
+    oldParentOrder.remove(childId);
     oldParentOrder.save();
 
     const newParentOrder = await Model.get(newParentId);
 
-    newParentOrder.pushChild(childId);
+    newParentOrder.push(childId);
     await newParentOrder.save();
   }
 
   /**
-   * @param pages
-   * @param currentPageId
-   * @param parentPageId
-   * @param ignoreSelf
+   * Returns new array with ordered pages
+   *
+   * @param {Array<Page>} pages - list of all available pages
+   * @param {string} currentPageId - page's id around which we are ordering
+   * @param {string} parentPageId - parent page's id that contains page above
+   * @param {Boolean} ignoreSelf - should we ignore current page in list or not
    * @return Array<Page>
    */
   static async getOrderedChildren(pages, currentPageId, parentPageId, ignoreSelf = false) {
-    const children = await PagesChildrenOrder.get(parentPageId);
+    const children = await PagesOrder.get(parentPageId);
     const result = [];
 
     children.order.forEach(pageId => {
       pages.forEach(page => {
-        if (page._id === pageId && pageId !== currentPageId) {
+        if (page._id === pageId && (pageId !== currentPageId || !ignoreSelf)) {
           result.push(page);
         }
       });
@@ -68,10 +80,9 @@ class PagesChildrenOrder {
   }
 
   /**
-   * @param currentPageId
-   * @param parentPageId
-   * @param putAbovePageId
-   * @return {Promise<void>}
+   * @param {string} currentPageId - page's id that changes the order
+   * @param {string} parentPageId - parent page's id that contains both two pages
+   * @param {string} putAbovePageId - page's id above which we put the target page
    */
   static async update(currentPageId, parentPageId, putAbovePageId) {
     const children = await Model.get(parentPageId);
@@ -93,4 +104,4 @@ class PagesChildrenOrder {
   }
 }
 
-module.exports = PagesChildrenOrder;
+module.exports = PagesOrder;

src/models/pageChildrenOrder.js

@@ -1,115 +0,0 @@
-const {pagesChildrenOrder: db} = require('../utils/database/index');
-
-/**
- * PagesChildrenOrder
- */
-class PageChildrenOrder {
-  /**
-   * Returns current Page's children order
-   *
-   * @param pageId
-   */
-  static async get(pageId) {
-    const childrenOrder = await db.findOne({pageId});
-
-    let data = {};
-
-    if (!childrenOrder) {
-      data.pageId = pageId;
-    } else {
-      data = childrenOrder;
-    }
-
-    return new PageChildrenOrder(data);
-  }
-
-  /**
-   * @param data
-   */
-  constructor(data) {
-    if (data === null) {
-      data = {};
-    }
-
-    if (data._id) {
-      this._id = data._id;
-    }
-
-    this.data = data;
-  }
-
-  /**
-   * constructor data setter
-   * @param pagesChildrenOrderData
-   */
-  set data(pagesChildrenOrderData) {
-    this._pageId = pagesChildrenOrderData.pageId || 0;
-    this._childrenOrder = pagesChildrenOrderData.childrenOrder || [];
-  }
-
-  /**
-   * Return Page Children order
-   */
-  get data() {
-    return {
-      _id: this._id,
-      pageId: '' + this._pageId,
-      childrenOrder: this._childrenOrder
-    };
-  }
-
-  /**
-   * Pushes to the orders array
-   * @param pageChild
-   */
-  pushChild(pageChild) {
-    this._childrenOrder.push(pageChild);
-  }
-
-  /**
-   * Removes child
-   * @param pageChild
-   */
-  removeChild(pageChild) {
-    const found = this._childrenOrder.indexOf(pageChild);
-
-    if (found >= 0) {
-      this._childrenOrder.splice(found, 1);
-    }
-  }
-
-  /**
-   * @return {Array}
-   */
-  get order() {
-    return this._childrenOrder;
-  }
-
-  /**
-   * Save or update page data in the database
-   */
-  async save() {
-    if (!this._id) {
-      const insertedRow = await db.insert(this.data);
-
-      this._id = insertedRow._id;
-    } else {
-      await db.update({_id: this._id}, this.data);
-    }
-
-    return this;
-  }
-
-  /**
-   * Remove page data from the database
-   */
-  async destroy() {
-    await db.remove({_id: this._id});
-
-    delete this._id;
-
-    return this;
-  }
-}
-
-module.exports = PageChildrenOrder;

src/models/pageOrder.js

@@ -0,0 +1,132 @@
+const {pagesOrder: db} = require('../utils/database/index');
+
+/**
+ * @typedef {Object} PageOrderData
+ * @property {string} _id - row unique id
+ * @property {string} page - page id
+ * @property {Array<string>} order - list of ordered pages
+ */
+
+/**
+ * @class PageOrder
+ * @classdesc PageOrder
+ *
+ * Creates order for Pages with children
+ */
+class PageOrder {
+  /**
+   * Returns current Page's children order
+   *
+   * @param page
+   */
+  static async get(page) {
+    const order = await db.findOne({page});
+
+    let data = {};
+
+    if (!order) {
+      data.page = page;
+    } else {
+      data = order;
+    }
+
+    return new PageOrder(data);
+  }
+
+  /**
+   * @constructor
+   *
+   * @param {PageOrderData} data
+   */
+  constructor(data) {
+    if (data === null) {
+      data = {};
+    }
+
+    if (data._id) {
+      this._id = data._id;
+    }
+
+    this.data = data;
+  }
+
+  /**
+   * constructor data setter
+   * @param {PageOrderData} pageOrderData
+   */
+  set data(pageOrderData) {
+    this._page = pageOrderData.page || 0;
+    this._order = pageOrderData.order || [];
+  }
+
+  /**
+   * Return Page Children order
+   * @returns {PageOrderData}
+   */
+  get data() {
+    return {
+      _id: this._id,
+      page: '' + this._page,
+      order: this._order
+    };
+  }
+
+  /**
+   * Pushes page id to the orders array
+   *
+   * @param {string} pageId
+   */
+  push(pageId) {
+    this._order.push(pageId);
+  }
+
+  /**
+   * Removes page id from orders array
+   *
+   * @param {string} pageId
+   */
+  remove(pageId) {
+    const found = this._order.indexOf(pageId);
+
+    if (found >= 0) {
+      this._order.splice(found, 1);
+    }
+  }
+
+  /**
+   * Returns ordered list
+   *
+   * @return {Array<string>}
+   */
+  get order() {
+    return this._order;
+  }
+
+  /**
+   * Save or update page data in the database
+   */
+  async save() {
+    if (!this._id) {
+      const insertedRow = await db.insert(this.data);
+
+      this._id = insertedRow._id;
+    } else {
+      await db.update({_id: this._id}, this.data);
+    }
+
+    return this;
+  }
+
+  /**
+   * Remove page data from the database
+   */
+  async destroy() {
+    await db.remove({_id: this._id});
+
+    delete this._id;
+
+    return this;
+  }
+}
+
+module.exports = PageOrder;

src/routes/api/pages.js

@@ -2,7 +2,7 @@ const express = require('express');
 const router = express.Router();
 const multer = require('multer')();
 const Pages = require('../../controllers/pages');
-const PagesChildrenOrder = require('../../controllers/pagesChildrenOrder');
+const PagesOrder = require('../../controllers/pagesOrder');
 
 /**
  * GET /page/:id
@@ -57,7 +57,7 @@ router.put('/page', multer.any(), async (req, res) => {
     const page = await Pages.insert({title, body, parent});
 
     /** push to the orders array */
-    await PagesChildrenOrder.push(parent, page._id);
+    await PagesOrder.push(parent, page._id);
 
     res.json({
       success: true,
@@ -84,9 +84,9 @@ router.post('/page/:id', multer.any(), async (req, res) => {
     let page = await Pages.get(id);
 
     if (page._parent !== parent) {
-      await PagesChildrenOrder.renew(page._parent, parent, id);
+      await PagesOrder.renew(page._parent, parent, id);
     } else {
-      await PagesChildrenOrder.update(page._id, page._parent, putAbovePageId);
+      await PagesOrder.update(page._id, page._parent, putAbovePageId);
     }
 
     page = await Pages.update(id, {title, body, parent});

src/routes/middlewares/pages.js

@@ -1,5 +1,5 @@
 const Pages = require('../../controllers/pages');
-const PagesChildrenOrder = require('../../controllers/pagesChildrenOrder');
+const pagesOrder = require('../../controllers/pagesOrder');
 const asyncMiddleware = require('../../utils/asyncMiddleware');
 
 /**
@@ -11,7 +11,7 @@ async function createMenuTree(pages) {
   return Promise.all(pages.filter(page => page._parent === '0').map(async page => {
     const childrenOrdered = [];
     try {
-      const children = await PagesChildrenOrder.get(page._id);
+      const children = await pagesOrder.get(page._id);
       children.order.forEach(pageId => {
         pages.forEach(_page => {
           if (_page._id === pageId) {

src/routes/pages.js

@@ -1,7 +1,7 @@
 const express = require('express');
 const router = express.Router();
 const Pages = require('../controllers/pages');
-const PagesChildrenOrder = require('../controllers/pagesChildrenOrder');
+const PagesOrder = require('../controllers/pagesOrder');
 
 /**
  * Create new page form
@@ -24,7 +24,7 @@ router.get('/page/edit/:id', async (req, res, next) => {
   try {
     const page = await Pages.get(pageId);
     const pagesAvailable = await Pages.getAll();
-    const parentsChildrenOrdered = await PagesChildrenOrder.getOrderedChildren(pagesAvailable, pageId, page._parent, true);
+    const parentsChildrenOrdered = await PagesOrder.getOrderedChildren(pagesAvailable, pageId, page._parent, true);
 
     res.render('pages/form', {
       page,

src/utils/database/index.js

@@ -1,5 +1,5 @@
 const pages = require('./pages');
-const pagesChildrenOrder = require('./pagesChildrenOrder');
+const pagesOrder = require('./pagesOrder');
 
 /**
  * @class Database
@@ -144,5 +144,5 @@ class Database {
 module.exports = {
   class: Database,
   pages: new Database(pages),
-  pagesChildrenOrder: new Database(pagesChildrenOrder)
+  pagesOrder: new Database(pagesOrder)
 };

src/utils/database/pagesOrder.js

@@ -1,6 +1,6 @@
 const Datastore = require('nedb');
 const config = require('../../../config');
 
-const db = new Datastore({filename: `./${config.database}/pagesChildrenOrder.db`, autoload: true});
+const db = new Datastore({filename: `./${config.database}/pagesOrder.db`, autoload: true});
 
 module.exports = db;