add source code viewer for different languages

scm-ui/src/repos/sources/components/content/SourcecodeViewer.js

@@ -86,10 +86,29 @@ class SourcecodeViewer extends React.Component<Props, State> {
 }
 
 export function getLanguage(contentType: string) {
-  return contentType.substring(
+  const language = contentType.substring(
     contentType.indexOf("/") + 1,
     contentType.length
   );
+
+  let languageType;
+
+  switch (language) {
+    case "x-go":
+      languageType = "go";
+      break;
+    case "x-java-source":
+      languageType = "java";
+      break;
+    case "x-web-markdown":
+      languageType = "markdown";
+      break;
+    default:
+      languageType = language;
+  }
+
+  console.log(languageType);
+  return languageType;
 }
 
 export function getContent(url: string) {

scm-ui/src/repos/sources/components/content/SourcecodeViewer.test.js

@@ -20,11 +20,20 @@ describe("get content", () => {
   });
 });
 
-describe("get correct language Type", () => {
+describe("get correct language type", () => {
   it("should return javascript", () => {
     expect(getLanguage("application/javascript")).toBe("javascript");
   });
   it("should return text", () => {
     expect(getLanguage("text/plain")).toBe("plain");
   });
+  it("should return go", () => {
+    expect(getLanguage("text/x-go")).toBe("go");
+  });
+  it("should return java", () => {
+    expect(getLanguage("text/x-java-source")).toBe("java");
+  });
+  it("should return markdown", () => {
+    expect(getLanguage("text/x-web-markdown")).toBe("markdown");
+  });
 });

scm-ui/src/repos/sources/containers/Content.js

@@ -152,6 +152,7 @@ export function getContentType(url: string, state: any) {
   return apiClient
     .head(url)
     .then(response => {
+      console.log(response.headers.get("Content-Type"));
       return { type: response.headers.get("Content-Type") };
     })
     .catch(err => {