Add extracurricular activities and signup validation to the API

Author: HarshitMCT

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"]
+    },
+    "Soccer Team": {
+        "description": "Practice soccer skills and compete in inter-school matches",
+        "schedule": "Mondays and Wednesdays, 4:00 PM - 5:30 PM",
+        "max_participants": 22,
+        "participants": ["liam@mergington.edu", "noah@mergington.edu"]
+    },
+    "Basketball Club": {
+        "description": "Develop teamwork and basketball fundamentals",
+        "schedule": "Tuesdays and Fridays, 4:00 PM - 5:30 PM",
+        "max_participants": 15,
+        "participants": ["ava@mergington.edu", "isabella@mergington.edu"]
+    },
+    "Drama Club": {
+        "description": "Explore acting, stage presence, and theater production",
+        "schedule": "Thursdays, 3:30 PM - 5:00 PM",
+        "max_participants": 18,
+        "participants": ["mia@mergington.edu", "charlotte@mergington.edu"]
+    },
+    "Painting Workshop": {
+        "description": "Learn painting techniques and create visual art projects",
+        "schedule": "Wednesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 16,
+        "participants": ["amelia@mergington.edu", "harper@mergington.edu"]
+    },
+    "Debate Team": {
+        "description": "Build public speaking and critical thinking through debates",
+        "schedule": "Mondays, 3:30 PM - 5:00 PM",
+        "max_participants": 14,
+        "participants": ["elijah@mergington.edu", "james@mergington.edu"]
+    },
+    "Math Olympiad": {
+        "description": "Solve advanced math problems and prepare for competitions",
+        "schedule": "Fridays, 3:30 PM - 5:00 PM",
+        "max_participants": 12,
+        "participants": ["lucas@mergington.edu", "benjamin@mergington.edu"]
     }
 }
 
@@ -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}"}