Initial commit

lib/utils/io.dart

@@ -0,0 +1,22 @@
+import 'dart:io';
+
+extension FSExt on FileSystemEntity {
+  Future<void> deleteIfExists() async {
+    if (await exists()) {
+      await delete();
+    }
+  }
+
+  int get size {
+    if (this is File) {
+      return (this as File).lengthSync();
+    } else if(this is Directory){
+      var size = 0;
+      for(var file in (this as Directory).listSync()){
+        size += file.size;
+      }
+      return size;
+    }
+    return 0;
+  }
+}