From 6209640b0bcc7bae5638ec00fc31d902a1b145a3 Mon Sep 17 00:00:00 2001
From: Rudraa <rudybbx3@gmail.com>
Date: Thu, 9 May 2024 19:16:06 +0400
Subject: [PATCH] Projects Table CRUD

---
 backend/src/DatabaseCreds.env |  5 +++
 backend/src/db.js             | 21 +++++++++
 backend/src/index.js          |  7 ++-
 backend/src/projects.js       | 83 +++++++++++++++++++++++++++++++++++
 4 files changed, 114 insertions(+), 2 deletions(-)
 create mode 100644 backend/src/DatabaseCreds.env
 create mode 100644 backend/src/db.js
 create mode 100644 backend/src/projects.js

diff --git a/backend/src/DatabaseCreds.env b/backend/src/DatabaseCreds.env
new file mode 100644
index 0000000..40219bc
--- /dev/null
+++ b/backend/src/DatabaseCreds.env
@@ -0,0 +1,5 @@
+Db_Host = 'localhost'
+Db_Port = '5432'
+Db_Username = 'postgres'
+Db_Password = "rudy123"
+Db_Database = 'TechClub_Website'
diff --git a/backend/src/db.js b/backend/src/db.js
new file mode 100644
index 0000000..70b2815
--- /dev/null
+++ b/backend/src/db.js
@@ -0,0 +1,21 @@
+//db.js
+
+/* 
+Consists of the code used to establish a database connection
+*/
+
+const {Pool} = require('pg')
+require("dotenv").config({path: 'DatabaseCreds.env'});
+
+
+const pool = new Pool({
+  user: process.env.Db_Username,
+  host: process.env.Db_Host,
+  database: process.env.Db_Database,
+  password: process.env.Db_Password,
+  port: process.env.Db_Port,
+});
+
+console.log(process.env.Password)
+
+module.exports = pool;
diff --git a/backend/src/index.js b/backend/src/index.js
index f5f395f..9ac7158 100644
--- a/backend/src/index.js
+++ b/backend/src/index.js
@@ -2,8 +2,11 @@ const express = require('express')
 const app = express()
 const port = 3000
 
-app.get('/', (req, res) => {
-    res.send('Hello World!');
+const db = require('./db.js')
+
+app.get('/', async (req, res) => {
+
+    res.status(200).status('Working Good :)')
 })
 
 app.listen(port, () => {
diff --git a/backend/src/projects.js b/backend/src/projects.js
new file mode 100644
index 0000000..3104f50
--- /dev/null
+++ b/backend/src/projects.js
@@ -0,0 +1,83 @@
+//projects.js
+
+const pool = require('./db.js')
+
+/* 
+The following file contains the code to 
+assemble the projects table, display functions and functions to 
+perform CRUD Operations
+ */
+
+async function createTable() {
+  //ENUM for project status
+
+  await pool.query(`
+    CREATE TYPE project_status as ENUM('Hiring', 'Completed','Ongoing'); 
+    
+  `);
+
+  //This code creates the table
+
+  await pool.query(`
+
+        CREATE TABLE Projects(
+            id integer,
+            name varchar(50) ,
+            body varchar(200) ,
+            description varchar(200),
+            tags varchar(200),
+            status project_status,
+            created_date date,
+            last_modified timestamp without time zone DEFAULT CURRENT_TIMESTAMP
+        );
+    `);
+
+  //This code is a trigger and a function code applied whenever a change
+  //is made on the Projects Table
+
+  await pool.query(`CREATE OR REPLACE FUNCTION update_last_modified()
+            RETURNS trigger
+            LANGUAGE 'plpgsql'
+                    
+            AS $$
+
+            BEGIN 	
+                NEW.last_modified = CURRENT_TIMESTAMP;
+                RETURN NEW;
+
+            END;
+            $$;
+    `)
+
+    await pool.query(`CREATE OR REPLACE TRIGGER trigger_update_last_modified
+                BEFORE UPDATE 
+                ON Projects
+                FOR EACH ROW
+                EXECUTE FUNCTION update_last_modified();
+    `)
+};
+
+
+async function createProject(id,name,body, description, tags, status, created_date, last_modified){
+    //This inserts an entry into the table
+    await pool.query(`
+        INSERT INTO Projects VALUES(${id},${name},${body},${description},${tags},${status},${created_date},${last_modified});
+    `);
+}
+
+/* Now some of the fetch functions to get a particular Project*/
+
+async function fetchProjects(){ 
+    const projects = await pool.query(`
+        SELECT * FROM Projects;
+    `)
+    return projects.rows[0];
+}
+
+async function fetchProjectsByID(id){
+    const project = await pool.query(`
+        SELECT * FROM Projects WHERE id = ${id};
+    `)
+
+    return project.rows[0]
+}
\ No newline at end of file