support for database seed

README.md

@@ -13,11 +13,11 @@ The project directory is organized as follows:
 - ``routes``: this hosts the Express router which powers the project's REST API
 - ``server.js``: the backend "entryway" for the application, which hosts the server and the integration for the API.
 
-## Installing and Running the Project Locally
+## Installing and Running the Development Build Locally
 1. Clone the project repository from the root level.
 2. Node modules are hosted both at root directory level and within the client directory.
 3. At the root directory level, run ``npm install`` to install backend dependencies.
 4. Change into the ``/client`` directory and run ``npm install`` to install frontend dependencies.
 5. Still within ``/client``, run ``npm run dev`` to start the Vite development server.
-6. In another terminal window at the root directory level, run ``node server.js`` to start the localhost server.
+6. In another terminal window at the root directory level, run ``npm start`` to start the localhost server.
 7. It should indicate that the server is listening on its designated port, and log each database transaction to the console.

db/Seed.js

@@ -0,0 +1,76 @@
+const { Client } = require('pg');
+require('dotenv').config({ path: "../.env" });
+
+(async () => {
+    const client = new Client({ connectionString: process.env.CONNECTION });
+    await client.connect().then(console.log("Connection successful."));
+
+    const createUserTable = `
+        CREATE TABLE IF NOT EXISTS users (
+            id                  INT             PRIMARY KEY GENERATED ALWAYS AS IDENTITY NOT NULL,
+            username            VARCHAR         NOT NULL,
+            password            VARCHAR         NOT NULL,
+            firstname           VARCHAR         NOT NULL,
+            lastname            VARCHAR         NOT NULL
+        );
+    `;
+
+    const createCartTable = `
+        CREATE TABLE IF NOT EXISTS cart (
+            id                  INT             PRIMARY KEY GENERATED ALWAYS AS IDENTITY NOT NULL,
+            appUserId           INT             REFERENCES users(id),
+            subtotal            NUMERIC
+        );
+    `;
+
+    const createOrderTable = `
+        CREATE TABLE IF NOT EXISTS orders (
+            id                  INT             PRIMARY KEY GENERATED ALWAYS AS IDENTITY NOT NULL,
+            cartId              INT             REFERENCES cart(id),
+            delivered           BOOLEAN,
+            processed           BOOLEAN,
+            shipped             BOOLEAN
+        );
+    `;
+
+    const createCategoryTable = `
+        CREATE TABLE IF NOT EXISTS category (
+            id                  INT             PRIMARY KEY GENERATED ALWAYS AS IDENTITY NOT NULL,
+            name                VARCHAR         NOT NULL,
+            description         VARCHAR         NOT NULL
+        );
+    `;
+
+    const createProductTable = `
+        CREATE TABLE IF NOT EXISTS product (
+            id                  INT             PRIMARY KEY GENERATED ALWAYS AS IDENTITY NOT NULL,
+            name                VARCHAR         NOT NULL,
+            description         VARCHAR         NOT NULL,
+            category            VARCHAR         NOT NULL,
+            categoryId          INT             REFERENCES category(id),
+            price               NUMERIC         NOT NULL
+        );
+    `;
+
+    const createProductsCarts = `
+        CREATE TABLE IF NOT EXISTS products_carts (
+            productId           INT             REFERENCES product(id),
+            cartId              INT             REFERENCES cart(id)
+        );
+    `;
+
+    const allQueries = [createUserTable, createCartTable, createCategoryTable, createProductTable, createOrderTable, createProductsCarts];
+    let status;
+
+    try {
+        for (let q of allQueries) {
+            await client.query(q);
+        }
+        await client.end();
+        status = "Database setup successful!";
+    } catch(e) {
+        status = e;
+    }
+
+    console.log(status);
+})();

package.json

@@ -5,7 +5,8 @@
   "main": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start": "nodemon server.js"
+    "start": "nodemon server.js",
+    "seed": "cd db && node Seed.js"
   },
   "engines": {
     "node": "v16.13.1"