implemented integrations and events system

api/src/services/db/applicationService.ts

@@ -2,10 +2,19 @@ import { ApplicationListRow, ApplicationRow, CommentRow } from "@app/shared/type
 import pool from "../../db";
 import { error } from "console";
 
-export async function createApplication(memberID: number, appVersion: number, app: string) {
+/**
+ * Create an application in the db
+ * @param memberID 
+ * @param appVersion 
+ * @param app 
+ * @returns ID of the created application
+ */
+export async function createApplication(memberID: number, appVersion: number, app: string): Promise<number> {
   const sql = `INSERT INTO applications (member_id, app_version, app_data) VALUES (?, ?, ?);`;
   const params = [memberID, appVersion, JSON.stringify(app)]
-  return await pool.query(sql, params);
+
+  let result = await pool.query(sql, params);
+  return Number(result.insertId);
 }
 
 export async function getMemberApplication(memberID: number): Promise<ApplicationRow> {

api/src/services/events/eventBus.ts

@@ -0,0 +1,56 @@
+import { randomUUID } from "crypto";
+import { logger } from "../logging/logger";
+
+interface Event {
+    id: string
+    type: string
+    occurredAt: string
+    payload?: Record<string, any>
+}
+
+type EventHandler = (event: Event) => void | Promise<void>;
+
+class EventBus {
+    private handlers: Map<string, EventHandler[]> = new Map();
+
+    /**
+     * Register event listener
+     * @param type 
+     * @param handler 
+     */
+    on(type: string, handler: EventHandler) {
+        const handlers = this.handlers.get(type) ?? [];
+        handlers.push(handler);
+        this.handlers.set(type, handlers);
+    }
+
+    /**
+     * Emit event of given type
+     * @param type
+     * @param payload 
+     */
+    async emit(type: string, payload?: Record<string, any>) {
+        const event: Event = {
+            id: randomUUID(),
+            type,
+            occurredAt: new Date().toISOString(),
+            payload
+        }
+
+        const handlers = this.handlers.get(type) ?? []
+
+        for (const h of handlers) {
+            try {
+                await h(event)
+            } catch (error) {
+                logger.error('app', 'Event handler failed', {
+                    type: event.type,
+                    id: event.id,
+                    error: error instanceof Error ? error.message : String(error),
+                })
+            }
+        }
+    }
+}
+
+export const bus = new EventBus();

api/src/services/integrations/discord.ts

@@ -0,0 +1,32 @@
+import { bus } from "../events/eventBus";
+
+export function initializeDiscordIntegrations() {
+    bus.on('application.create', async (event) => {
+        let applicantName = event.payload.member_discord_id || event.payload.member_name;
+        if (event.payload.member_discord_id) {
+            applicantName = `<@${event.payload.member_discord_id}>`;
+        }
+        const link = `${process.env.CLIENT_URL}/administration/applications/${event.payload.application}`;
+
+        const embed = {
+            title: "Application Posted",
+            description: `[View Application](${link})`,
+            color: 0x00ff00, // optional: green color
+            timestamp: new Date().toISOString(), // <-- Discord expects ISO8601
+            fields: [
+                {
+                    name: "Submitted By",
+                    value: applicantName,
+                    inline: false,
+                },
+            ],
+        };
+
+        // send to Discord webhook
+        await fetch(process.env.DISCORD_APPLICATIONS_WEBHOOK!, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ embeds: [embed] }),
+        });
+    });
+}