Add leaderboard for all tracks and track calendar

server/internal/catalog/store_memory.go

@@ -8,15 +8,18 @@ import (
 // memoryStore is an in-process implementation of Store for tests and
 // for early PoC runs without a database. It is goroutine-safe.
 type memoryStore struct {
-	mu     sync.Mutex
-	tracks map[TrackID]TrackMeta
-	cars   map[CarID]CarMeta
+	mu       sync.Mutex
+	tracks   map[TrackID]TrackMeta
+	cars     map[CarID]CarMeta
+	calendar []TrackCalendarEntry
+	nextID   int
 }
 
 func newMemoryStore() *memoryStore {
 	return &memoryStore{
 		tracks: make(map[TrackID]TrackMeta),
 		cars:   make(map[CarID]CarMeta),
+		nextID: 1,
 	}
 }
 
@@ -72,4 +75,32 @@ func (m *memoryStore) UpdateCarStats(_ context.Context, id string, fn func(*CarM
 	fn(&c)
 	m.cars[id] = c
 	return nil
+}
+
+func (m *memoryStore) GetTrackCalendar(_ context.Context) ([]TrackCalendarEntry, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	out := append([]TrackCalendarEntry(nil), m.calendar...)
+	return out, nil
+}
+
+func (m *memoryStore) CreateTrackCalendar(_ context.Context, entry TrackCalendarEntry) (TrackCalendarEntry, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	entry.ID = m.nextID
+	m.nextID++
+	m.calendar = append(m.calendar, entry)
+	return entry, nil
+}
+
+func (m *memoryStore) DeleteTrackCalendar(_ context.Context, id int) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	for i, entry := range m.calendar {
+		if entry.ID == id {
+			m.calendar = append(m.calendar[:i], m.calendar[i+1:]...)
+			return nil
+		}
+	}
+	return ErrNotFound
 }