feat: begin working on the categorize

internal/shared/utility/generator.go

@@ -1,9 +1,25 @@
 package utility
 
 import (
+	"crypto/sha512"
+	"encoding/hex"
+	"io"
+
 	"github.com/google/uuid"
 )
 
+func GenerateHashFromReader(r io.Reader) (string, error) {
+	h := sha512.New()
+	if _, err := io.Copy(h, r); err != nil {
+		return "", err
+	}
+
+	// return the sha checksum in hex
+	return hex.EncodeToString(h.Sum(nil)), nil
+	// alternatively return in base64
+	//return base64.StdEncoding.EncodeToString(h.Sum(nil)), nil
+}
+
 func GenerateSafeName(category MediaType, ext string) string {
 	return uuid.New().String() + "_" + string(category) + ext
 }