fix: check for empty uri

app/src/main/java/ani/dantotsu/download/DownloadsManager.kt

@@ -141,13 +141,18 @@ class DownloadsManager(private val context: Context) {
         newUri: Uri,
         finished: (Boolean, String) -> Unit
     ) {
-        try {
         if (oldUri == newUri) {
+            Logger.log("Source and destination are the same")
             finished(false, "Source and destination are the same")
             return
         }
+        if (oldUri == Uri.EMPTY) {
+            Logger.log("Old Uri is empty")
+            finished(true, "Old Uri is empty")
+            return
+        }
         CoroutineScope(Dispatchers.IO).launch {
-
+            try {
                 val oldBase =
                     DocumentFile.fromTreeUri(context, oldUri) ?: throw Exception("Old base is null")
                 val newBase =
@@ -199,13 +204,17 @@ class DownloadsManager(private val context: Context) {
                         finished(true, "Successfully moved downloads")
                         super.onCompleted(result)
                     }
+
                 })
-            }
 
             } catch (e: Exception) {
                 snackString("Error: ${e.message}")
+                Logger.log("Failed to move downloads: ${e.message}")
+                Logger.log(e)
+                Logger.log("oldUri: $oldUri, newUri: $newUri")
                 finished(false, "Failed to move downloads: ${e.message}")
-            return
+                return@launch
+            }
         }
     }