refactor data hosting

ui/util/diskspace.js

@@ -0,0 +1,22 @@
+const { exec } = require('child_process');
+
+export const diskSpaceLinux = (path) => {
+  return new Promise((resolve, reject) => {
+    exec(`df ${path}`, (error, stdout, stderr) => {
+      if (error) {
+        console.log(`error: ${error.message}`);
+        return reject();
+      }
+      if (stderr) {
+        return reject();
+      }
+      resolve(stdout);
+    });
+  });
+};
+
+// export diskSpaceWindows = (path) => {
+//   new Promise((resolve, reject) => {
+//
+//   });
+// }