API-36: 🚑 Fixing critical issue with the amount of sql connections (!15)

Co-authored-by: Patrick Mueller <patrick@mueller-patrick.tech>
Reviewed-on: #15
Co-authored-by: Patrick Müller <patrick@plutodev.de>
Co-committed-by: Patrick Müller <patrick@plutodev.de>

src/models/partyplaner/event/event.service.ts

@@ -1,24 +1,9 @@
 import * as dotenv from 'dotenv';
 import {Event} from './Event.interface';
+import {PartyPlanerDB} from '../PartyPlaner.db';
 
 dotenv.config();
 
-const mariadb = require('mariadb');
-const prod_pool = mariadb.createPool({
-    host: process.env.DB_HOST,
-    user: process.env.DB_USER,
-    password: process.env.DB_PASSWORD,
-    database: process.env.PARTYPLANER_PROD_DATABASE,
-    connectionLimit: 5
-});
-const dev_pool = mariadb.createPool({
-    host: process.env.DB_HOST,
-    user: process.env.DB_USER,
-    password: process.env.DB_PASSWORD,
-    database: process.env.PARTYPLANER_DEV_DATABASE,
-    connectionLimit: 5
-});
-
 /**
  * Returns all events of the given user
  * @param useDev If the dev or prod database should be used
@@ -26,14 +11,8 @@ const dev_pool = mariadb.createPool({
  * @return Event[] A list of events
  */
 export const getEventData = async (useDev: boolean, userId: string): Promise<Event[]> => {
-    let conn;
+    let conn = PartyPlanerDB.getConnection(useDev);
     try {
-        if (useDev) {
-            conn = await dev_pool.getConnection();
-        } else {
-            conn = await prod_pool.getConnection();
-        }
-
         let eventRows = await conn.query('SELECT event_id, name, description, takes_place_date, registration_until_date, max_participants FROM events WHERE creator_id = ?', userId);
 
         let eventsMap = new Map<string, Event>();
@@ -90,9 +69,5 @@ export const getEventData = async (useDev: boolean, userId: string): Promise<Eve
         return eventsList;
     } catch (err) {
         throw err;
-    } finally {
-        if (conn) {
-            conn.end();
-        }
     }
 };