Add extracurricular activities and signup validation to API

Author: NSky

src/app.py

@@ -21,6 +21,42 @@
 
 # In-memory activity database
 activities = {
+    "Football Club": {
+        "description": "Join our competitive football team and develop your skills",
+        "schedule": "Mondays and Wednesdays, 4:00 PM - 5:30 PM",
+        "max_participants": 25,
+        "participants": ["alex@mergington.edu"]
+    },
+    "Basketball Team": {
+        "description": "Practice basketball and compete in inter-school tournaments",
+        "schedule": "Tuesdays and Thursdays, 4:00 PM - 5:30 PM",
+        "max_participants": 15,
+        "participants": ["james@mergington.edu"]
+    },
+    "Art Club": {
+        "description": "Explore painting, drawing, and other visual arts",
+        "schedule": "Wednesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 20,
+        "participants": ["lucy@mergington.edu", "ava@mergington.edu"]
+    },
+    "Music Ensemble": {
+        "description": "Learn and perform music with the school ensemble",
+        "schedule": "Fridays, 4:00 PM - 5:30 PM",
+        "max_participants": 18,
+        "participants": ["noah@mergington.edu"]
+    },
+    "Debate Team": {
+        "description": "Develop critical thinking and public speaking skills",
+        "schedule": "Mondays and Thursdays, 3:30 PM - 4:30 PM",
+        "max_participants": 16,
+        "participants": ["grace@mergington.edu", "thomas@mergington.edu"]
+    },
+    "Math Club": {
+        "description": "Explore advanced mathematics and solve challenging problems",
+        "schedule": "Tuesdays, 4:00 PM - 5:00 PM",
+        "max_participants": 14,
+        "participants": ["benjamin@mergington.edu"]
+        },
     "Chess Club": {
         "description": "Learn strategies and compete in chess tournaments",
         "schedule": "Fridays, 3:30 PM - 5:00 PM",
@@ -62,6 +98,10 @@ def signup_for_activity(activity_name: str, email: str):
     # Get the specific activity
     activity = activities[activity_name]
 
+    # Validate student is not already signed up
+    if email in activity["participants"]:
+        raise HTTPException(status_code=400, detail="Student already signed up for this activity")
+    
     # Add student
     activity["participants"].append(email)
     return {"message": f"Signed up {email} for {activity_name}"}