Add extracurricular activities and signup validation to the API

Author: Barry-kyo

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 teamwork and compete in soccer matches",
+        "schedule": "Mondays and Thursdays, 4:00 PM - 5:30 PM",
+        "max_participants": 25,
+        "participants": ["liam@mergington.edu", "ava@mergington.edu"]
+    },
+    "Basketball Club": {
+        "description": "Train for basketball games and improve coordination",
+        "schedule": "Wednesdays, 4:00 PM - 5:30 PM",
+        "max_participants": 18,
+        "participants": ["noah@mergington.edu", "mia@mergington.edu"]
+    },
+    "Art Club": {
+        "description": "Create paintings, drawings, and mixed-media art",
+        "schedule": "Tuesdays, 4:00 PM - 5:30 PM",
+        "max_participants": 15,
+        "participants": ["isabella@mergington.edu", "lucas@mergington.edu"]
+    },
+    "Drama Club": {
+        "description": "Perform scenes, practice acting, and stage productions",
+        "schedule": "Fridays, 4:00 PM - 6:00 PM",
+        "max_participants": 20,
+        "participants": ["grace@mergington.edu", "zach@mergington.edu"]
+    },
+    "Debate Team": {
+        "description": "Develop public speaking and argumentation skills",
+        "schedule": "Wednesdays, 5:00 PM - 6:30 PM",
+        "max_participants": 16,
+        "participants": ["ella@mergington.edu", "mason@mergington.edu"]
+    },
+    "Math Club": {
+        "description": "Explore math puzzles, competitions, and problem solving",
+        "schedule": "Thursdays, 3:30 PM - 4:30 PM",
+        "max_participants": 22,
+        "participants": ["charlotte@mergington.edu", "ethan@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 not 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}"}