1 files changed, 51 insertions, 3 deletions

diff --git a/app/assets/javascripts/ide/utils.js b/app/assets/javascripts/ide/utils.js
index cde53e1ef00..4cf4f5e1d81 100644
--- a/app/assets/javascripts/ide/utils.js
+++ b/app/assets/javascripts/ide/utils.js
@@ -1,6 +1,7 @@
 import { languages } from 'monaco-editor';
 import { flatten, isString } from 'lodash';
 import { SIDE_LEFT, SIDE_RIGHT } from './constants';
+import { performanceMarkAndMeasure } from '~/performance_utils';
 
 const toLowerCase = x => x.toLowerCase();
 
@@ -42,16 +43,17 @@ const KNOWN_TYPES = [
   },
 ];
 
-export function isTextFile({ name, content, mimeType = '' }) {
+export function isTextFile({ name, raw, content, mimeType = '' }) {
   const knownType = KNOWN_TYPES.find(type => type.isMatch(mimeType, name));
-
   if (knownType) return knownType.isText;
 
   // does the string contain ascii characters only (ranges from space to tilde, tabs and new lines)
   const asciiRegex = /^[ -~\t\n\r]+$/;
 
+  const fileContents = raw || content;
+
   // for unknown types, determine the type by evaluating the file contents
-  return isString(content) && (content === '' || asciiRegex.test(content));
+  return isString(fileContents) && (fileContents === '' || asciiRegex.test(fileContents));
 }
 
 export const createPathWithExt = p => {
@@ -137,3 +139,49 @@ export function readFileAsDataURL(file) {
 export function getFileEOL(content = '') {
   return content.includes('\r\n') ? 'CRLF' : 'LF';
 }
+
+/**
+ * Adds or increments the numeric suffix to a filename/branch name.
+ * Retains underscore or dash before the numeric suffix if it already exists.
+ *
+ * Examples:
+ *  hello -> hello-1
+ *  hello-2425 -> hello-2425
+ *  hello.md -> hello-1.md
+ *  hello_2.md -> hello_3.md
+ *  hello_ -> hello_1
+ *  master-patch-22432 -> master-patch-22433
+ *  patch_332 -> patch_333
+ *
+ * @param {string} filename File name or branch name
+ * @param {number} [randomize] Should randomize the numeric suffix instead of auto-incrementing?
+ */
+export function addNumericSuffix(filename, randomize = false) {
+  return filename.replace(/([ _-]?)(\d*)(\..+?$|$)/, (_, before, number, after) => {
+    const n = randomize
+      ? Math.random()
+          .toString()
+          .substring(2, 7)
+          .slice(-5)
+      : Number(number) + 1;
+    return `${before || '-'}${n}${after}`;
+  });
+}
+
+export const measurePerformance = (
+  mark,
+  measureName,
+  measureStart = undefined,
+  measureEnd = mark,
+) => {
+  performanceMarkAndMeasure({
+    mark,
+    measures: [
+      {
+        name: measureName,
+        start: measureStart,
+        end: measureEnd,
+      },
+    ],
+  });
+};