Add extracurricular activities and signup validation to API

Author: TsasAL

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 and compete in interschool soccer matches",
+        "schedule": "Tuesdays and Thursdays, 4:00 PM - 5:30 PM",
+        "max_participants": 25,
+        "participants": ["alex@mergington.edu", "mia@mergington.edu"]
+    },
+    "Swimming Club": {
+        "description": "Swimming lessons and competitive training",
+        "schedule": "Wednesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 15,
+        "participants": ["lucas@mergington.edu"]
+    },
+    "Art Studio": {
+        "description": "Explore painting, drawing, and mixed media art",
+        "schedule": "Mondays, 3:30 PM - 5:00 PM",
+        "max_participants": 18,
+        "participants": ["isabella@mergington.edu", "ava@mergington.edu"]
+    },
+    "Drama Club": {
+        "description": "Acting, theater production, and performance arts",
+        "schedule": "Thursdays, 4:00 PM - 6:00 PM",
+        "max_participants": 20,
+        "participants": ["noah@mergington.edu"]
+    },
+    "Debate Team": {
+        "description": "Develop critical thinking and public speaking skills",
+        "schedule": "Wednesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 16,
+        "participants": ["liam@mergington.edu", "charlotte@mergington.edu"]
+    },
+    "Science Olympiad": {
+        "description": "Compete in science and engineering challenges",
+        "schedule": "Fridays, 3:30 PM - 5:30 PM",
+        "max_participants": 15,
+        "participants": ["ethan@mergington.edu"]
     }
 }
 
@@ -62,6 +98,11 @@ 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}"}