Global code ovehaul - remove CAS and other, add 15 minute greet check

- Remove CAS, as it no longer works for us
- Remove other checks
- Implement 15 minute greet timeout check
- Fix chat logos
- Ditch thirdparty logger, use stdlib log facility wrapper for logging

internal/moon/greetCache.go

@@ -0,0 +1,52 @@
+package moon
+
+import (
+	"time"
+
+	"github.com/akyoto/cache"
+)
+
+// newEventCache creates an eventCache whose expired entries are swept every
+// cleaningInterval.
+func newEventCache[T any](cleaningInterval time.Duration) *eventCache[T] {
+	return &eventCache[T]{cache: cache.New(cleaningInterval)}
+}
+
+// Set stores value under the microsecond key with the given TTL.
+func (m *eventCache[T]) Set(micros int64, value T, ttl time.Duration) {
+	m.cache.Set(micros, value, ttl)
+}
+
+// Snapshot returns a typed copy of all non-expired entries keyed by their
+// microsecond timestamp. Callers can range over the returned map without
+// performing any interface{} conversions.
+func (m *eventCache[T]) Snapshot() map[int64]T {
+	out := make(map[int64]T)
+
+	m.cache.Range(
+		func(k, v any) bool {
+			key, ok := k.(int64)
+			if !ok {
+				return true
+			}
+
+			value, ok := v.(T)
+			if !ok {
+				return true
+			}
+
+			out[key] = value
+
+			return true
+		},
+	)
+
+	return out
+}
+
+// Delete removes the entry stored under the given microsecond key.
+func (m *eventCache[T]) Delete(micros int64) {
+	m.cache.Delete(micros)
+}
+
+/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */