Keep downloaded images files 3 days

app/src/main/java/eu/faircode/email/WorkerCleanup.java

@@ -47,6 +47,7 @@ import static android.os.Process.THREAD_PRIORITY_BACKGROUND;
 public class WorkerCleanup extends Worker {
     private static final int CLEANUP_INTERVAL = 4; // hours
     private static final long KEEP_FILES_DURATION = 3600 * 1000L; // milliseconds
+    private static final long KEEP_IMAGES_DURATION = 3 * 24 * 3600 * 1000L; // milliseconds
     private static final long KEEP_CONTACTS_DURATION = 180 * 24 * 3600 * 1000L; // milliseconds
     private static final long KEEP_LOG_DURATION = 24 * 3600 * 1000L; // milliseconds
 
@@ -189,7 +190,8 @@ public class WorkerCleanup extends Worker {
                     if (manual || file.lastModified() + KEEP_FILES_DURATION < now) {
                         long id = Long.parseLong(file.getName().split("_")[0]);
                         EntityMessage message = db.message().getMessage(id);
-                        if (message == null) {
+                        if (manual || message == null ||
+                                file.lastModified() + KEEP_IMAGES_DURATION < now) {
                             Log.i("Deleting " + file);
                             if (!file.delete())
                                 Log.w("Error deleting " + file);