API-19: Adding event endpoint (#10)

Co-authored-by: Patrick Müller <patrick@mueller-patrick.tech>
Reviewed-on: #10
Co-authored-by: Patrick Müller <patrick@plutodev.de>
Co-committed-by: Patrick Müller <patrick@plutodev.de>

src/models/partyplaner/data/Data.router.ts

@@ -106,3 +106,35 @@ dataRouter.get('/friendship/:isDevCall', async (req: Request, res: Response) =>
         res.status(500).send({'message': 'Internal Server Error. Try again later.'});
     }
 });
+
+dataRouter.get('/event/:isDevCall', async (req: Request, res: Response) => {
+    try {
+        let userId = (req.query.userId ?? '').toString();
+        let sessionId = (req.query.sessionId ?? '').toString();
+        let sessionKey = (req.query.sessionKey ?? '').toString();
+        let useDev: boolean = (req.params.isDevCall ?? '') === 'dev'; // TBD
+
+        if (userId === '' || sessionId === '' || sessionKey === '') {
+            res.status(400).send({
+                'status': 'WRONG_PARAMS',
+                'message': 'Missing or wrong parameters'
+            });
+            return;
+        }
+
+        if (!await UserService.checkSession(useDev, userId, sessionId, sessionKey)) {
+            res.status(403).send({
+                'status': 'INVALID_SESSION',
+                'message': 'The user or session could not be found or the session is invalid'
+            });
+            return;
+        }
+
+        let data = await DataService.getEventData(useDev, userId);
+
+        res.status(200).send(data);
+    } catch (e) {
+        logger.error('Error handling a request: ' + e.message);
+        res.status(500).send({'message': 'Internal Server Error. Try again later.'});
+    }
+});

src/models/partyplaner/data/data.service.ts

@@ -52,6 +52,42 @@ export interface Friendship {
     friendUsername: string;
 }
 
+/**
+ * Used in the getEventData method
+ */
+export interface Invite {
+    inviteId: string;
+    inviteKey: string;
+    validUntil: Date;
+    alreadyUsed: boolean;
+    invitedPersonName: string;
+}
+
+/**
+ * Used in the getEventData method
+ */
+export interface Registration {
+    registrationId: string;
+    name: string;
+    registeredDate: Date;
+    takesPart: boolean;
+    comment: string;
+}
+
+/**
+ * Used in the getEventData method as a return value
+ */
+export interface Event {
+    eventId: string;
+    name: string;
+    description: string;
+    takesPlaceDate: Date;
+    registrationUntilDate: Date;
+    maxParticipants: number;
+    invites: Invite[];
+    registrations: Registration[];
+}
+
 /**
  * Returns all data about the given user
  * @param useDev If the dev or prod database should be used
@@ -135,7 +171,7 @@ export const getSessionData = async (useDev: boolean, userId: string): Promise<S
  * Returns all friends 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 Friendship A list of friends
+ * @return Friendship[] A list of friends
  */
 export const getFriendshipData = async (useDev: boolean, userId: string): Promise<Friendship[]> => {
     let conn;
@@ -169,3 +205,81 @@ export const getFriendshipData = async (useDev: boolean, userId: string): Promis
         }
     }
 };
+
+/**
+ * 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();
+        }
+    }
+};