added revalidate cache feature

internal/steamimmich.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"log"
 	"slices"
+	"sort"
+	"strconv"
 )
 
 type Config struct {
@@ -86,3 +88,84 @@ func Run(config Config) {
 		return
 	}
 }
+
+func Revalidate(config Config) {
+	immichClient := newImmichHttpClient(config.APIKey)
+
+	localState, err := loadLocalState(config.CacheFile)
+	if err != nil {
+		log.Fatalf("Failed to load local state: %s", err)
+		return
+	}
+
+	hashes, err := hashFiles(localState.Assets)
+	if err != nil {
+		log.Fatalf("Failed to generate hashes: %s", err)
+		return
+	}
+
+	idxToRemoveFromCache := []int{}
+
+	rejected := 0
+	updated := 0
+	missingFromImmich := 0
+	missingFile := 0
+
+	// Prepare payload
+	var idsToCheck = []assetBulkUploadCheckItem{}
+	for i := range localState.Assets {
+		hash := hashes[i]
+		if hash == "" {
+			idxToRemoveFromCache = append(idxToRemoveFromCache, i)
+			missingFile += 1
+		} else {
+			idsToCheck = append(idsToCheck, assetBulkUploadCheckItem{Checksum: hashes[i], Id: strconv.Itoa(i)})
+		}
+	}
+
+	results, err := bulkCheckAssets(idsToCheck, config.BaseURL, immichClient)
+	if err != nil {
+		log.Fatalf("Failed to bulk check hashes: %s", err)
+	}
+
+	for _, result := range results {
+		i, err := strconv.Atoi(result.Id)
+		if err != nil {
+			log.Fatalf("What ?: %s", err)
+			return
+		}
+
+		asset := localState.Assets[i]
+
+		if asset.ImmichID != result.AssetId {
+			log.Printf("Asset %s had the wrong Immich ID. New %s", asset.FilePath, result.AssetId)
+			localState.Assets[i].ImmichID = result.AssetId
+			updated += 1
+		}
+
+		if result.Action == "reject" {
+			rejected += 1
+		} else {
+			idxToRemoveFromCache = append(idxToRemoveFromCache, i)
+			missingFromImmich += 1
+		}
+	}
+
+	sort.Sort(sort.Reverse(sort.IntSlice(idxToRemoveFromCache)))
+	for _, idx := range idxToRemoveFromCache {
+		localState.Assets[idx] = localState.Assets[len(localState.Assets)-1]
+		localState.Assets = localState.Assets[:len(localState.Assets)-1]
+	}
+
+	saveLocalState(config.CacheFile, *localState)
+
+	log.Printf("Revalidated %d assets", len(results))
+	log.Printf("Assets present on Immich: %d", rejected)
+	log.Printf("Wrong metadata on cache: %d", updated)
+	log.Printf("Missing on Immich: %d", missingFromImmich)
+	log.Printf("Missing on local storage: %d", missingFile)
+
+	if (updated + missingFromImmich + missingFromImmich) > 0 {
+		log.Printf("Fixed cache. Run the normal upload command again. If error persists try removing cache file at: %s", config.CacheFile)
+	}
+}