Implement displaying last modified date in index

Author: owenl131

lib/core/show-dir/index.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const styles = require('./styles');
+const lastModifiedToString = require('./last-modified-to-string');
 const permsToString = require('./perms-to-string');
 const sizeToString = require('./size-to-string');
 const sortFiles = require('./sort-files');
@@ -114,6 +115,7 @@ module.exports = (opts) => {
               html += `<td class="perms"><code>(${permsToString(file[1])})</code></td>`;
             }
             html +=
+              `<td class="last-modified">${lastModifiedToString(file[1])}</td>` +
               `<td class="file-size"><code>${sizeToString(file[1], humanReadable, si)}</code></td>` +
               `<td class="display-name"><a href="${href}">${displayName}</a></td>` +
               '</tr>\n';

lib/core/show-dir/last-modified-to-string.js

@@ -0,0 +1,10 @@
+'use strict';
+
+module.exports = function lastModifiedToString(stat) {
+  const t = new Date(stat.mtime);
+  return (("0" + (t.getDate())).slice(-2) + '-' +
+          t.toLocaleString('default', { month: 'short' }) + '-' + 
+          t.getFullYear() + ' ' +
+          ("0" + t.getHours()).slice(-2) + ':' +
+          ("0" + t.getMinutes()).slice(-2));
+};