feat: complete media discovery

backend/common/media_store/store.go

@@ -70,9 +70,9 @@ func (s Store) Hashes() []string {
 }
 
 // Exists
-func (s Store) Exists(name string) bool {
+func (s Store) HashExists(hash string) bool {
 	for _, m := range s {
-		if m.Name == name {
+		if m.Hash == hash {
 			return true
 		}
 	}

backend/modules/tasks/discover/discover_medias.go

@@ -58,7 +58,7 @@ func (d *DiscoverMedias) RunE(from, to string) error {
 			return errors.Wrapf(err, "get file md5: %s", video)
 		}
 
-		if store.Exists(md5) {
+		if store.HashExists(md5) {
 			continue
 		}
 
@@ -242,7 +242,7 @@ func (d *DiscoverMedias) runCleanup(to string) {
 	}
 
 	for _, dir := range dirs {
-		if store.Exists(dir) {
+		if store.HashExists(dir) {
 			continue
 		}