chore: refactor backend events

src/core/events/database.py

@@ -0,0 +1,18 @@
+import logging
+from fastapi import FastAPI
+import pymongo
+
+async def connect_to_db(app: FastAPI) :
+    logging.info("Connecting to database...")
+    try:
+        app.mongodb_client = pymongo.MongoClient("mongodb://learnhouse:learnhouse@mongo:27017/") # type: ignore
+        app.db = app.mongodb_client["learnhouse"] # type: ignore
+        logging.info("Connected to database!")
+    except Exception as e:
+        logging.error("Failed to connect to database!")
+        logging.error(e)
+
+async def close_database(app: FastAPI):
+    app.mongodb_client.close() # type: ignore
+    logging.info("LearnHouse has been shut down.")
+    return app