Moving exmple datasets to json files

software/backend/scripts/categories.json

@@ -0,0 +1,5 @@
+{
+    "id": 1,
+    "title": "Hello World",
+    "completed": false
+}

software/backend/scripts/databaseHelper.ts

@@ -0,0 +1,33 @@
+import { Category } from '../models/category.model'
+import { OrderedItem } from '../models/orderedItem.model'
+import { Order } from '../models/order.model'
+import { Product } from '../models/product.model'
+import { Account } from '../models/account.model'
+
+import categories from "./../data/categories.json"
+import products from "./../data/products.json"
+import accounts from "./../data/accounts.json"
+import orders from "./../data/orders.json"
+import orderedItems from "./../data/orderedItems.json"
+
+/**
+ * Delete all datasets in every database table
+ */
+export function deleteAllTables() {
+  Category.destroy({ truncate: true })
+  OrderedItem.destroy({ truncate: true })
+  Order.destroy({ truncate: true })
+  Product.destroy({ truncate: true })
+  Account.destroy({ truncate: true })
+}
+
+/**
+ * Insert default datasets in the database tables
+ */
+export function prepopulateDatabase() {
+  Category.bulkCreate(categories.data)
+  Product.bulkCreate(products.data)
+  Account.bulkCreate(accounts.data)
+  Order.bulkCreate(orders.data)
+  OrderedItem.bulkCreate(orderedItems.data)
+}