API-23: Refactoring for better architecture (#12)

Endpoints are separated into distinct packages and interfaces are extracted into files

Co-authored-by: Patrick Müller <patrick@mueller-patrick.tech>
Reviewed-on: #12
Co-authored-by: Patrick Müller <patrick@plutodev.de>
Co-committed-by: Patrick Müller <patrick@plutodev.de>

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

@@ -0,0 +1,98 @@
+import * as dotenv from 'dotenv';
+import {Event} from './event.interface';
+
+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
+ * @param userId The userId of the user to fetch the friends for
+ * @return Event[] A list of events
+ */
+export const getEventData = async (useDev: boolean, userId: string): Promise<Event[]> => {
+    let conn;
+    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>();
+        let eventIds: string[] = [];
+
+        for (let row of eventRows) {
+            eventIds.push(row.event_id);
+            let event = {
+                eventId: row.event_id,
+                name: row.name,
+                description: row.description,
+                takesPlaceDate: row.takes_place_date,
+                registrationUntilDate: row.registration_until_date,
+                maxParticipants: row.max_participants,
+                invites: [],
+                registrations: []
+            };
+            eventsMap.set(row.event_id, event);
+        }
+
+        let registrationRows = await conn.query('SELECT registration_id, name, registered_date, takes_part, comment, event_id FROM event_registration WHERE event_id IN (?)', eventIds);
+
+        for (let row of registrationRows) {
+            let event = eventsMap.get(row.event_id);
+            if (!event) continue;
+            event.registrations.push({
+                registrationId: row.registration_id,
+                name: row.name,
+                registeredDate: row.registered_date,
+                takesPart: row.takes_part,
+                comment: row.comment
+            });
+        }
+
+        let inviteRows = await conn.query('SELECT invite_id, invite_key, valid_until, already_used, invited_person_name, event_id FROM invitations WHERE event_id IN (?)', eventIds);
+
+        for (let row of inviteRows) {
+            let event = eventsMap.get(row.event_id);
+            if (!event) continue;
+            event.invites.push({
+                inviteId: row.invite_id,
+                inviteKey: row.invite_key,
+                validUntil: row.valid_until,
+                alreadyUsed: row.already_used,
+                invitedPersonName: row.invited_person_name
+            });
+        }
+
+        let eventsList: Event[] = [];
+        for (let event of eventsMap.values()) {
+            eventsList.push(event);
+        }
+
+        return eventsList;
+    } catch (err) {
+        throw err;
+    } finally {
+        if (conn) {
+            conn.end();
+        }
+    }
+};