Add extracurricular activities and signup validation to the API

src/app.py

@@ -38,6 +38,45 @@ activities = {
         "schedule": "Mondays, Wednesdays, Fridays, 2:00 PM - 3:00 PM",
         "max_participants": 30,
         "participants": ["john@mergington.edu", "olivia@mergington.edu"]
+    },
+    # Sports related activities
+    "Soccer Team": {
+        "description": "Join the school soccer team and compete in matches",
+        "schedule": "Wednesdays, 4:00 PM - 5:30 PM",
+        "max_participants": 18,
+        "participants": ["lucas@mergington.edu", "mia@mergington.edu"]
+    },
+    "Basketball Club": {
+        "description": "Practice basketball skills and play friendly games",
+        "schedule": "Thursdays, 3:30 PM - 5:00 PM",
+        "max_participants": 15,
+        "participants": ["liam@mergington.edu", "ava@mergington.edu"]
+    },
+    # Artistic activities
+    "Art Workshop": {
+        "description": "Explore painting, drawing, and sculpture techniques",
+        "schedule": "Mondays, 4:00 PM - 5:30 PM",
+        "max_participants": 16,
+        "participants": ["ella@mergington.edu", "noah@mergington.edu"]
+    },
+    "Drama Club": {
+        "description": "Act, direct, and produce school plays and performances",
+        "schedule": "Tuesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 20,
+        "participants": ["isabella@mergington.edu", "jack@mergington.edu"]
+    },
+    # Intellectual activities
+    "Mathletes": {
+        "description": "Compete in math competitions and solve challenging problems",
+        "schedule": "Fridays, 4:00 PM - 5:00 PM",
+        "max_participants": 10,
+        "participants": ["oliver@mergington.edu", "charlotte@mergington.edu"]
+    },
+    "Science Club": {
+        "description": "Conduct experiments and explore scientific concepts",
+        "schedule": "Wednesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 14,
+        "participants": ["henry@mergington.edu", "amelia@mergington.edu"]
     }
 }
 
@@ -55,6 +94,12 @@ def get_activities():
 @app.post("/activities/{activity_name}/signup")
 def signup_for_activity(activity_name: str, email: str):
     """Sign up a student for an activity"""
+
+    # Validate student is not already signed up
+    for activity in activities.values():
+        if email in activity["participants"]:
+            raise HTTPException(status_code=400, detail="Student already signed up for an activity")
+
     # Validate activity exists
     if activity_name not in activities:
         raise HTTPException(status_code=404, detail="Activity not found")