package caching

import (
	"time"
)

// Caches contains a set of references to caches. They may be
// different implementations as long as they satisfy the Cache
// interface.
type Caches struct {
	RoomVersions       Cache // RoomVersionCache
	ServerKeys         Cache // ServerKeyCache
	RoomServerRoomNIDs Cache // RoomServerNIDsCache
	RoomServerRoomIDs  Cache // RoomServerNIDsCache
	RoomInfos          Cache // RoomInfoCache
	FederationEvents   Cache // FederationEventsCache
	SpaceSummaryRooms  Cache // SpaceSummaryRoomsCache
	LazyLoading        Cache // LazyLoadCache
}

// Cache is the interface that an implementation must satisfy.
type Cache interface {
	Get(key string) (value interface{}, ok bool)
	Set(key string, value interface{})
	Unset(key string)
}

const CacheNoMaxAge = time.Duration(0)