Frontent build system is ready (#3)

* Frontent build system is ready

* Set up linter for frontend part

* move code to /src

* update db

* upd test

* remove db

* ignore .db

controllers/pages.js

@@ -1,106 +0,0 @@
-const Model = require('../models/page');
-
-/**
- * @class Pages
- * @classdesc Pages controller
- */
-class Pages {
-  /**
-   * @static
-   * Fields required for page model creation
-   *
-   * @returns {['title', 'body']}
-   */
-  static get REQUIRED_FIELDS() {
-    return ['title', 'body'];
-  }
-
-  /**
-   * @static
-   * Find and return page model with passed id
-   *
-   * @param {string} id - page id
-   * @returns {Promise<Page>}
-   */
-  static async get(id) {
-    const page = await Model.get(id);
-
-    if (!page._id) {
-      throw new Error('Page with given id does not exist');
-    }
-
-    return page;
-  }
-
-  /**
-   * Return all pages
-   *
-   * @returns {Promise<Page[]>}
-   */
-  static async getAll() {
-    return Model.getAll();
-  }
-
-  /**
-   * Create new page model and save it in the database
-   *
-   * @param {PageData} data
-   * @returns {Promise<Page>}
-   */
-  static async insert(data) {
-    if (!Pages.validate(data)) {
-      throw new Error('Invalid request format');
-    }
-
-    const page = new Model(data);
-
-    return page.save();
-  }
-
-  /**
-   * Check PageData object for required fields
-   *
-   * @param {PageData} data
-   * @returns {boolean}
-   */
-  static validate(data) {
-    return Pages.REQUIRED_FIELDS.every(field => typeof data[field] !== 'undefined');
-  }
-
-  /**
-   * Update page with given id in the database
-   *
-   * @param {string} id - page id
-   * @param {PageData} data
-   * @returns {Promise<Page>}
-   */
-  static async update(id, data) {
-    const page = await Model.get(id);
-
-    if (!page._id) {
-      throw new Error('Page with given id does not exist');
-    }
-
-    page.data = data;
-
-    return page.save();
-  }
-
-  /**
-   * Remove page with given id from the database
-   *
-   * @param {string} id - page id
-   * @returns {Promise<Page>}
-   */
-  static async remove(id) {
-    const page = await Model.get(id);
-
-    if (!page._id) {
-      throw new Error('Page with given id does not exist');
-    }
-
-    return page.destroy();
-  }
-}
-
-module.exports = Pages;