Show file mode on file listing, add ability to change file mode

resources/scripts/helpers.ts

@@ -20,3 +20,33 @@ export const randomInt = (low: number, high: number) => Math.floor(Math.random()
 export const cleanDirectoryPath = (path: string) => path.replace(/(^#\/*)|(\/(\/*))|(^$)/g, '/');
 
 export const capitalize = (s: string) => s.charAt(0).toUpperCase() + s.slice(1).toLowerCase();
+
+export function fileBitsToString (mode: string, directory: boolean): string {
+    const m = parseInt(mode, 8);
+
+    let buf = '';
+    'dalTLDpSugct?'.split('').forEach((c, i) => {
+        if ((m & (1 << (32 - 1 - i))) !== 0) {
+            buf = buf + c;
+        }
+    });
+
+    if (buf.length === 0) {
+        // If the file is directory, make sure it has the directory flag.
+        if (directory) {
+            buf = 'd';
+        } else {
+            buf = '-';
+        }
+    }
+
+    'rwxrwxrwx'.split('').forEach((c, i) => {
+        if ((m & (1 << (9 - 1 - i))) !== 0) {
+            buf = buf + c;
+        } else {
+            buf = buf + '-';
+        }
+    });
+
+    return buf;
+}