Filter non-image files and deduplicate by keeping the largest file in each group

main.go

@@ -45,6 +45,12 @@ func main() {
 		go func(file string) {
 			defer wg.Done()
 			log := logger.Default.WithPrefix(file)
+			ext := filepath.Ext(file)
+			if ext != ".jpg" && ext != ".jpeg" && ext != ".png" {
+				log.Debug("Skipping non-image file: %s", file)
+				return
+			}
+
 			imgfile, err := os.Open(file)
 			if err != nil {
 				log.Error("Failed to open file: %v", err)
@@ -68,9 +74,17 @@ func main() {
 
 	groupedImages := make(map[string][]string)
 	wg.Wait()
+
+	processed := make(map[string]bool)
 	hashes.Range(func(key, value interface{}) bool {
 		filea := key.(string)
 		hasha := value.(*goimagehash.ExtImageHash)
+
+		if processed[filea] {
+			return true
+		}
+
+		var group []string
 		hashes.Range(func(key, value interface{}) bool {
 			fileb := key.(string)
 			hashb := value.(*goimagehash.ExtImageHash)
@@ -84,15 +98,48 @@ func main() {
 			}
 			logger.Debug("Distance between %v and %v: %v", filea, fileb, distance)
 			if distance <= *thresh {
-				groupedImages[filea] = append(groupedImages[filea], fileb)
+				group = append(group, fileb)
+				processed[fileb] = true
 			}
 			return true
 		})
+
+		if len(group) > 0 {
+			groupedImages[filea] = group
+			processed[filea] = true
+		}
 		return true
 	})
 
-	for file, files := range groupedImages {
+	// Deduplicate by keeping the largest file in each group
-		logger.Info("Grouped %v with %v", file, files)
+	for file, group := range groupedImages {
+		// Add the main file to the group for size comparison
+		allFiles := append([]string{file}, group...)
+
+		// Find the largest file
+		var largestFile string
+		var largestSize int64
+		for _, f := range allFiles {
+			info, err := os.Stat(f)
+			if err != nil {
+				logger.Error("Failed to get file info for %s: %v", f, err)
+				continue
+			}
+			if info.Size() > largestSize {
+				largestSize = info.Size()
+				largestFile = f
+			}
+		}
+
+		// Remove all files except the largest one
+		for _, f := range allFiles {
+			if f != largestFile {
+				logger.Info("Removing duplicate: %s (keeping %s)", f, largestFile)
+				if err := os.Remove(f); err != nil {
+					logger.Error("Failed to remove file %s: %v", f, err)
+				}
+			}
+		}
 	}
 	logger.Info("Done")
 }