Adding initial scaffolding to rename the repository

Signed-off-by: Kris Nóva <kris@nivenly.com>

internal/api/cache.go

@@ -0,0 +1,68 @@
+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")
+}