added diff endpoint which returns a parsed diff as json

scm-ui/ui-components/src/repos/LoadingDiff.tsx

@@ -50,10 +50,15 @@ class LoadingDiff extends React.Component<Props, State> {
     this.setState({ loading: true });
     apiClient
       .get(url)
-      .then(response => response.text())
-      .then(parser.parse)
-      // $FlowFixMe
-      .then((diff: any) => {
+      .then(response => {
+        const contentType = response.headers.get("Content-Type");
+        if (contentType && contentType.toLowerCase() === "application/vnd.scmm-diffparsed+json;v=2") {
+          return response.json().then(data => data.files);
+        } else {
+          return response.text().then(parser.parse);
+        }
+      })
+      .then((diff: File[]) => {
         this.setState({
           loading: false,
           diff: diff

scm-ui/ui-components/src/repos/TokenizedDiffView.tsx

@@ -46,10 +46,17 @@ type Props = {
   className?: string;
 };
 
+const determineLanguage = (file: File) => {
+  if (file.language) {
+    return file.language.toLowerCase();
+  }
+  return "text";
+};
+
 const TokenizedDiffView: FC<Props> = ({ file, viewType, className, children }) => {
   const { tokens } = useTokenizeWorker(tokenize, {
     hunks: file.hunks,
-    language: file.language || "text"
+    language: determineLanguage(file)
   });
 
   return (

scm-ui/ui-components/src/repos/changesets/ChangesetDiff.tsx

@@ -11,13 +11,14 @@ type Props = WithTranslation & {
 
 class ChangesetDiff extends React.Component<Props> {
   isDiffSupported(changeset: Changeset) {
-    return !!changeset._links.diff;
+    return changeset._links.diff || !!changeset._links.diffParsed;
   }
 
   createUrl(changeset: Changeset) {
-    if (changeset._links.diff) {
-      const link = changeset._links.diff as Link;
-      return link.href + "?format=GIT";
+    if (changeset._links.diffParsed) {
+      return (changeset._links.diffParsed as Link).href;
+    } else if (changeset._links.diff) {
+      return (changeset._links.diff as Link).href + "?format=GIT";
     }
     throw new Error("diff link is missing");
   }