move fileSize to ui-components so it available for plugins

scm-ui-components/packages/ui-components/src/FileSize.js

@@ -0,0 +1,27 @@
+// @flow
+import React from "react";
+
+type Props = {
+  bytes: number
+};
+
+class FileSize extends React.Component<Props> {
+  static format(bytes: number) {
+    if (!bytes) {
+      return "0 B";
+    }
+
+    const units = ["B", "K", "M", "G", "T", "P", "E", "Z", "Y"];
+    const i = Math.floor(Math.log(bytes) / Math.log(1024));
+
+    const size = i === 0 ? bytes : (bytes / 1024 ** i).toFixed(2);
+    return `${size} ${units[i]}`;
+  }
+
+  render() {
+    const formattedBytes = FileSize.format(this.props.bytes);
+    return <span>{formattedBytes}</span>;
+  }
+}
+
+export default FileSize;