utils: Add an utility function to format bytes.

src/utils/FormattingUtils.js

@@ -30,6 +30,22 @@ export function formatCount(count) {
    return (count / 1000000000).toFixed(1) + "B"; // 10B is enough for anyone, right? :S
 }
 
+/**
+ * format a size in bytes into a human readable form
+ * e.g: 1024 -> 1.00 KB
+ */
+export function formatBytes(bytes, decimals = 2) {
+    if (bytes === 0) return '0 Bytes';
+
+    const k = 1024;
+    const dm = decimals < 0 ? 0 : decimals;
+    const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
+
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+
+    return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
+}
+
 /**
  * format a key into groups of 4 characters, for easier visual inspection
  *