feat: add new extracurricular activities and improve signup validation

Author: Roelf

src/app.py

@@ -38,6 +38,45 @@
         "schedule": "Mondays, Wednesdays, Fridays, 2:00 PM - 3:00 PM",
         "max_participants": 30,
         "participants": ["[email protected]", "[email protected]"]
+    },
+    # Sports activities
+    "Soccer Team": {
+        "description": "Join the school soccer team and compete in local leagues",
+        "schedule": "Tuesdays and Thursdays, 4:00 PM - 5:30 PM",
+        "max_participants": 22,
+        "participants": ["[email protected]", "[email protected]"]
+    },
+    "Basketball Club": {
+        "description": "Practice basketball skills and play friendly matches",
+        "schedule": "Wednesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 15,
+        "participants": ["[email protected]", "[email protected]"]
+    },
+    # Artistic activities
+    "Art Club": {
+        "description": "Explore painting, drawing, and other visual arts",
+        "schedule": "Mondays, 3:30 PM - 5:00 PM",
+        "max_participants": 18,
+        "participants": ["[email protected]", "[email protected]"]
+    },
+    "Drama Society": {
+        "description": "Participate in theater productions and acting workshops",
+        "schedule": "Thursdays, 4:00 PM - 5:30 PM",
+        "max_participants": 25,
+        "participants": ["[email protected]", "[email protected]"]
+    },
+    # Intellectual activities
+    "Math Olympiad": {
+        "description": "Prepare for math competitions and solve challenging problems",
+        "schedule": "Fridays, 2:00 PM - 3:30 PM",
+        "max_participants": 16,
+        "participants": ["[email protected]", "[email protected]"]
+    },
+    "Science Club": {
+        "description": "Conduct experiments and explore scientific concepts",
+        "schedule": "Wednesdays, 4:00 PM - 5:00 PM",
+        "max_participants": 20,
+        "participants": ["[email protected]", "[email protected]"]
     }
 }
 
@@ -62,6 +101,14 @@ def signup_for_activity(activity_name: str, email: str):
     # Get the specific activity
     activity = activities[activity_name]
 
-    # Add student
+# Validate student is not already signed up
+    if email in activity["participants"]:
+        raise HTTPException(status_code=400, detail="Already signed up for this activity")
+
+    # Check if max participants reached
+    if len(activity["participants"]) > activity["max_participants"]:
+        raise HTTPException(status_code=400, detail="Activity is full")
+
+    # Add student to participants
     activity["participants"].append(email)
-    return {"message": f"Signed up {email} for {activity_name}"}
+    return {"message": f"Signed up {email} for {activity_name}"}