photoprism/internal/api/cache.go

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package api
import (
"fmt"
"strconv"
"github.com/photoprism/photoprism/internal/service"
"github.com/photoprism/photoprism/internal/thumb"
)
// MaxAge represents a cache TTL in seconds.
type MaxAge int
// String returns the cache TTL in seconds as string.
func (a MaxAge) String() string {
return strconv.Itoa(int(a))
}
// Default cache TTL times in seconds.
var (
CoverCacheTTL MaxAge = 3600 // 1 hour
ThumbCacheTTL MaxAge = 3600 * 24 * 90 // ~ 3 months
)
type ThumbCache struct {
FileName string
ShareName string
}
type ByteCache struct {
Data []byte
}
// CacheKey returns a cache key string based on namespace, uid and name.
func CacheKey(ns, uid, name string) string {
return fmt.Sprintf("%s:%s:%s", ns, uid, name)
}
// RemoveFromFolderCache removes an item from the folder cache e.g. after indexing.
func RemoveFromFolderCache(rootName string) {
cache := service.FolderCache()
cacheKey := fmt.Sprintf("folder:%s:%t:%t", rootName, true, false)
cache.Delete(cacheKey)
log.Debugf("removed %s from cache", cacheKey)
}
// RemoveFromAlbumCoverCache removes covers by album UID e.g. after adding or removing photos.
func RemoveFromAlbumCoverCache(uid string) {
cache := service.CoverCache()
for typeName := range thumb.Types {
cacheKey := CacheKey(albumCover, uid, typeName)
cache.Delete(cacheKey)
log.Debugf("removed %s from cache", cacheKey)
}
}
// FlushCoverCache clears the complete cover cache.
func FlushCoverCache() {
service.CoverCache().Flush()
log.Debugf("albums: flushed cover cache")
}