Add participant management features to activities

requirements.txt

@@ -1,2 +1,4 @@
 fastapi
 uvicorn
+pytest
+httpx

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"]
+    },
+    "Basketball Team": {
+        "description": "Competitive basketball training and inter-school matches",
+        "schedule": "Tuesdays and Thursdays, 4:00 PM - 6:00 PM",
+        "max_participants": 15,
+        "participants": ["james@mergington.edu", "liam@mergington.edu"]
+    },
+    "Swimming Club": {
+        "description": "Swimming techniques and competitive training",
+        "schedule": "Mondays and Wednesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 20,
+        "participants": ["ava@mergington.edu", "noah@mergington.edu"]
+    },
+    "Drama Club": {
+        "description": "Acting, theater production, and performing arts",
+        "schedule": "Wednesdays, 3:30 PM - 5:30 PM",
+        "max_participants": 25,
+        "participants": ["isabella@mergington.edu", "ethan@mergington.edu"]
+    },
+    "Art Studio": {
+        "description": "Painting, drawing, and mixed media art projects",
+        "schedule": "Thursdays, 3:00 PM - 5:00 PM",
+        "max_participants": 18,
+        "participants": ["mia@mergington.edu", "lucas@mergington.edu"]
+    },
+    "Debate Team": {
+        "description": "Develop critical thinking and public speaking through debates",
+        "schedule": "Fridays, 4:00 PM - 6:00 PM",
+        "max_participants": 16,
+        "participants": ["charlotte@mergington.edu", "william@mergington.edu"]
+    },
+    "Science Olympiad": {
+        "description": "Competitive science events and hands-on experiments",
+        "schedule": "Tuesdays, 3:30 PM - 5:30 PM",
+        "max_participants": 20,
+        "participants": ["amelia@mergington.edu", "benjamin@mergington.edu"]
     }
 }
 
@@ -62,6 +98,29 @@ 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 is already signed up")
+
     # Add student
     activity["participants"].append(email)
     return {"message": f"Signed up {email} for {activity_name}"}
+
+
+@app.delete("/activities/{activity_name}/unregister")
+def unregister_from_activity(activity_name: str, email: str):
+    """Unregister a student from an activity"""
+    # Validate activity exists
+    if activity_name not in activities:
+        raise HTTPException(status_code=404, detail="Activity not found")
+
+    # Get the specific activity
+    activity = activities[activity_name]
+
+    # Validate student is signed up
+    if email not in activity["participants"]:
+        raise HTTPException(status_code=400, detail="Student is not signed up for this activity")
+
+    # Remove student
+    activity["participants"].remove(email)
+    return {"message": f"Unregistered {email} from {activity_name}"}

src/static/app.js

@@ -20,11 +20,37 @@ document.addEventListener("DOMContentLoaded", () => {
 
         const spotsLeft = details.max_participants - details.participants.length;
 
+        // Build participants list
+        let participantsList = '';
+        if (details.participants.length > 0) {
+          participantsList = `
+            <div class="participants-section">
+              <strong>Current Participants:</strong>
+              <ul class="participants-list">
+                ${details.participants.map(email => `
+                  <li>
+                    <span class="participant-email">${email}</span>
+                    <span class="delete-icon" data-activity="${name}" data-email="${email}" title="Remove participant">🗑️</span>
+                  </li>
+                `).join('')}
+              </ul>
+            </div>
+          `;
+        } else {
+          participantsList = `
+            <div class="participants-section">
+              <strong>Current Participants:</strong>
+              <p class="no-participants">No participants yet. Be the first to sign up!</p>
+            </div>
+          `;
+        }
+
         activityCard.innerHTML = `
           <h4>${name}</h4>
           <p>${details.description}</p>
           <p><strong>Schedule:</strong> ${details.schedule}</p>
           <p><strong>Availability:</strong> ${spotsLeft} spots left</p>
+          ${participantsList}
         `;
 
         activitiesList.appendChild(activityCard);
@@ -59,6 +85,9 @@ document.addEventListener("DOMContentLoaded", () => {
       const result = await response.json();
 
       if (response.ok) {
+        // Refresh the activities list
+        await fetchActivities();
+
         messageDiv.textContent = result.message;
         messageDiv.className = "success";
         signupForm.reset();
@@ -81,6 +110,52 @@ document.addEventListener("DOMContentLoaded", () => {
     }
   });
 
+  // Handle participant deletion
+  activitiesList.addEventListener("click", async (event) => {
+    if (event.target.classList.contains("delete-icon")) {
+      const activityName = event.target.getAttribute("data-activity");
+      const email = event.target.getAttribute("data-email");
+
+      if (!confirm(`Are you sure you want to unregister ${email} from ${activityName}?`)) {
+        return;
+      }
+
+      try {
+        const response = await fetch(
+          `/activities/${encodeURIComponent(activityName)}/unregister?email=${encodeURIComponent(email)}`,
+          {
+            method: "DELETE",
+          }
+        );
+
+        const result = await response.json();
+
+        if (response.ok) {
+          // Refresh the activities list
+          await fetchActivities();
+
+          messageDiv.textContent = result.message;
+          messageDiv.className = "success";
+        } else {
+          messageDiv.textContent = result.detail || "Failed to unregister participant";
+          messageDiv.className = "error";
+        }
+
+        messageDiv.classList.remove("hidden");
+
+        // Hide message after 5 seconds
+        setTimeout(() => {
+          messageDiv.classList.add("hidden");
+        }, 5000);
+      } catch (error) {
+        messageDiv.textContent = "Failed to unregister participant. Please try again.";
+        messageDiv.className = "error";
+        messageDiv.classList.remove("hidden");
+        console.error("Error unregistering participant:", error);
+      }
+    }
+  });
+
   // Initialize app
   fetchActivities();
 });

src/static/styles.css

@@ -74,6 +74,57 @@ section h3 {
   margin-bottom: 8px;
 }
 
+.participants-section {
+  margin-top: 15px;
+  padding-top: 12px;
+  border-top: 1px solid #e0e0e0;
+}
+
+.participants-section strong {
+  color: #1a237e;
+  display: block;
+  margin-bottom: 8px;
+}
+
+.participants-list {
+  list-style-type: none;
+  margin-left: 0;
+  color: #555;
+}
+
+.participants-list li {
+  padding: 8px 0;
+  font-size: 14px;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.participant-email {
+  flex-grow: 1;
+}
+
+.delete-icon {
+  cursor: pointer;
+  font-size: 16px;
+  margin-left: 10px;
+  opacity: 0.6;
+  transition: opacity 0.2s, transform 0.2s;
+  user-select: none;
+}
+
+.delete-icon:hover {
+  opacity: 1;
+  transform: scale(1.2);
+}
+
+.no-participants {
+  color: #999;
+  font-style: italic;
+  margin: 5px 0 0 0;
+  font-size: 14px;
+}
+
 .form-group {
   margin-bottom: 15px;
 }

tests/__init__.py

@@ -0,0 +1 @@
+"""Tests for Mergington High School API"""