Add extracurricular activities and signup validation

Author: makinsc

src/app.py

@@ -38,6 +38,42 @@
         "schedule": "Mondays, Wednesdays, Fridays, 2:00 PM - 3:00 PM",
         "max_participants": 30,
         "participants": ["john@mergington.edu", "olivia@mergington.edu"]
+    },
+    "Basketball Team": {
+        "description": "Join the school basketball team and compete in local leagues",
+        "schedule": "Mondays and Wednesdays, 4:00 PM - 6:00 PM",
+        "max_participants": 15,
+        "participants": ["liam@mergington.edu"]
+    },
+    "Soccer Club": {
+        "description": "Practice soccer skills and play friendly matches",
+        "schedule": "Tuesdays and Thursdays, 4:00 PM - 5:30 PM",
+        "max_participants": 18,
+        "participants": ["noah@mergington.edu"]
+    },
+    "Art Club": {
+        "description": "Explore painting, drawing, and other visual arts",
+        "schedule": "Fridays, 3:30 PM - 5:00 PM",
+        "max_participants": 10,
+        "participants": ["ava@mergington.edu"]
+    },
+    "Drama Society": {
+        "description": "Participate in school plays and drama workshops",
+        "schedule": "Wednesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 20,
+        "participants": ["mia@mergington.edu"]
+    },
+    "Math Olympiad": {
+        "description": "Prepare for math competitions and solve challenging problems",
+        "schedule": "Thursdays, 3:30 PM - 4:30 PM",
+        "max_participants": 12,
+        "participants": ["lucas@mergington.edu"]
+    },
+    "Debate Club": {
+        "description": "Develop public speaking and argumentation skills",
+        "schedule": "Mondays, 3:30 PM - 5:00 PM",
+        "max_participants": 16,
+        "participants": ["charlotte@mergington.edu"]
     }
 }
 
@@ -63,5 +99,9 @@ def signup_for_activity(activity_name: str, email: str):
     activity = activities[activity_name]
 
     # Add student
+    # 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")
+    
     activity["participants"].append(email)
     return {"message": f"Signed up {email} for {activity_name}"}