BETTERZON-38: Added all currently required models with required service classes and routers

Backend/src/models/categories/categories.interface.ts

@@ -0,0 +1,5 @@
+import {Category} from './category.interface';
+
+export interface Categories {
+    [key: number]: Category;
+}

Backend/src/models/categories/categories.router.ts

@@ -0,0 +1,112 @@
+/**
+ * Required External Modules and Interfaces
+ */
+
+import express, {Request, Response} from 'express';
+import * as CategoryService from './categories.service';
+import {Category} from './category.interface';
+import {Categories} from './categories.interface';
+
+
+/**
+ * Router Definition
+ */
+
+export const categoriesRouter = express.Router();
+
+
+/**
+ * Controller Definitions
+ */
+
+// GET items/
+
+categoriesRouter.get('/', async (req: Request, res: Response) => {
+    try {
+        const categories: Categories = await CategoryService.findAll();
+
+        res.status(200).send(categories);
+    } catch (e) {
+        res.status(404).send(e.message);
+    }
+});
+
+// GET items/:id
+
+categoriesRouter.get('/:id', async (req: Request, res: Response) => {
+    const id: number = parseInt(req.params.id, 10);
+
+    if (!id) {
+        res.status(400).send('Missing parameters.');
+        return;
+    }
+
+    try {
+        const category: Category = await CategoryService.find(id);
+
+        res.status(200).send(category);
+    } catch (e) {
+        res.status(404).send(e.message);
+    }
+});
+
+// GET items/:name
+
+categoriesRouter.get('/search/:term', async (req: Request, res: Response) => {
+    const term: string = req.params.term;
+
+    if (!term) {
+        res.status(400).send('Missing parameters.');
+        return;
+    }
+
+    try {
+        const categories: Categories = await CategoryService.findBySearchTerm(term);
+
+        res.status(200).send(categories);
+    } catch (e) {
+        res.status(404).send(e.message);
+    }
+});
+
+
+// POST items/
+
+// categoriesRouter.post('/', async (req: Request, res: Response) => {
+//     try {
+//         const category: Category = req.body.category;
+//
+//         await CategoryService.create(category);
+//
+//         res.sendStatus(201);
+//     } catch (e) {
+//         res.status(404).send(e.message);
+//     }
+// });
+//
+// // PUT items/
+//
+// categoriesRouter.put('/', async (req: Request, res: Response) => {
+//     try {
+//         const category: Category = req.body.category;
+//
+//         await CategoryService.update(category);
+//
+//         res.sendStatus(200);
+//     } catch (e) {
+//         res.status(500).send(e.message);
+//     }
+// });
+//
+// // DELETE items/:id
+//
+// categoriesRouter.delete('/:id', async (req: Request, res: Response) => {
+//     try {
+//         const id: number = parseInt(req.params.id, 10);
+//         await CategoryService.remove(id);
+//
+//         res.sendStatus(200);
+//     } catch (e) {
+//         res.status(500).send(e.message);
+//     }
+// });

Backend/src/models/categories/categories.service.ts

@@ -0,0 +1,135 @@
+import * as dotenv from 'dotenv';
+
+dotenv.config();
+
+const mariadb = require('mariadb');
+const pool = mariadb.createPool({
+    host: process.env.DB_HOST,
+    user: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_DATABASE,
+    connectionLimit: 5
+});
+
+/**
+ * Data Model Interfaces
+ */
+
+import {Category} from './category.interface';
+import {Categories} from './categories.interface';
+
+
+/**
+ * Service Methods
+ */
+
+export const findAll = async (): Promise<Categories> => {
+    let conn;
+    let categRows = [];
+    try {
+        conn = await pool.getConnection();
+        const rows = await conn.query('SELECT category_id, name FROM categories');
+        for (let row in rows) {
+            if (row !== 'meta') {
+                let categ: Category = {
+                    category_id: 0,
+                    name: ''
+                };
+                const sqlCateg = rows[row];
+
+                categ.category_id = sqlCateg.category_id;
+                categ.name = sqlCateg.name;
+                categRows.push(categ);
+            }
+        }
+
+    } catch (err) {
+        throw err;
+    } finally {
+        if (conn) {
+            conn.end();
+        }
+    }
+
+    return categRows;
+};
+
+export const find = async (id: number): Promise<Category> => {
+    let conn;
+    let categ: any;
+    try {
+        conn = await pool.getConnection();
+        const rows = await conn.query('SELECT category_id, name FROM categories WHERE category_id = ?', id);
+        for (let row in rows) {
+            if (row !== 'meta') {
+                categ = rows[row];
+            }
+        }
+
+    } catch (err) {
+        throw err;
+    } finally {
+        if (conn) {
+            conn.end();
+        }
+    }
+
+    return categ;
+};
+
+export const findBySearchTerm = async (term: string): Promise<Categories> => {
+    let conn;
+    let categRows = [];
+    try {
+        conn = await pool.getConnection();
+        term = '%' + term + '%';
+        const rows = await conn.query('SELECT category_id, name FROM categories WHERE name LIKE ?', term);
+        for (let row in rows) {
+            if (row !== 'meta') {
+                categRows.push(rows[row]);
+            }
+        }
+
+    } catch (err) {
+        throw err;
+    } finally {
+        if (conn) {
+            conn.end();
+        }
+    }
+
+    return categRows;
+};
+
+// export const create = async (newItem: Product): Promise<void> => {
+//     let conn;
+//     try {
+//         conn = await pool.getConnection();
+//         await conn.query("");
+//
+//     } catch (err) {
+//         throw err;
+//     } finally {
+//         if (conn) conn.end();
+//     }
+// };
+//
+// export const update = async (updatedItem: Product): Promise<void> => {
+//     if (models.products[updatedItem.product_id]) {
+//         models.products[updatedItem.product_id] = updatedItem;
+//         return;
+//     }
+//
+//     throw new Error("No record found to update");
+// };
+//
+// export const remove = async (id: number): Promise<void> => {
+//     const record: Product = models.products[id];
+//
+//     if (record) {
+//         delete models.products[id];
+//         return;
+//     }
+//
+//     throw new Error("No record found to delete");
+// };

Backend/src/models/categories/category.interface.ts

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+export interface Category {
+    category_id: number;
+    name: string;
+}