update database.py and main.py

backend/database.py

@@ -0,0 +1,77 @@
+import sqlite3
+from pathlib import Path
+
+DB_PATH = Path(__file__).parent.parent / "database" / "calendar.db"
+
+
+def get_connection():
+    """
+    Maakt een verbinding met de SQLite database.
+    """
+    conn = sqlite3.connect(DB_PATH)
+
+    # Zorgt dat foreign keys werken in SQLite
+    conn.execute("PRAGMA foreign_keys = ON")
+
+    # Resultaten kunnen als dictionary worden gebruikt
+    conn.row_factory = sqlite3.Row
+
+    return conn
+
+
+def execute(query, params=()):
+    """
+    Voor INSERT, UPDATE, DELETE.
+    """
+    with get_connection() as conn:
+        cursor = conn.cursor()
+        cursor.execute(query, params)
+        conn.commit()
+
+        return cursor.lastrowid
+
+
+def fetch_one(query, params=()):
+    """
+    Haalt één resultaat op.
+    """
+    with get_connection() as conn:
+        cursor = conn.cursor()
+        cursor.execute(query, params)
+
+        return cursor.fetchone()
+
+
+def fetch_all(query, params=()):
+    """
+    Haalt meerdere resultaten op.
+    """
+    with get_connection() as conn:
+        cursor = conn.cursor()
+        cursor.execute(query, params)
+
+        return cursor.fetchall()
+
+
+def test_connection():
+    """
+    Test of de database bereikbaar is.
+    """
+    with get_connection() as conn:
+        cursor = conn.cursor()
+        cursor.execute("SELECT name FROM sqlite_master WHERE type='table';")
+
+        return cursor.fetchall()
+
+
+if __name__ == "__main__":
+    print("Database:", DB_PATH)
+
+    tables = test_connection()
+
+    if tables:
+        print("Gevonden tabellen:")
+        for table in tables:
+            print("-", table["name"])
+    else:
+        print("Geen tabellen gevonden.")

backend/main.py

@@ -1,6 +1,32 @@
 # Python backend for a calender for my friend group.
 # We had the problem of never agreeing when or where
-# we should meet up, and I hope this fixes the problem.
+# we should meet up, and I hope this fixes the problem. 
+
+from fastapi import FastAPI
+from database import fetch_all
+
+app = FastAPI(
+    title="Calendar API",
+    description="Room based agenda system",
+    version="0.1"
+)
+
+
+@app.get("/")
+def home():
+    return {
+        "status": "online",
+        "service": "Calendar API"
+    }
+
+
+@app.get("/database")
+def database_status():
+    tables = fetch_all(
+        "SELECT name FROM sqlite_master WHERE type='table';"
+    )
+
+    return {
+        "tables": [table["name"] for table in tables]
+    }
 
-import fastapi
-import time