Initial Move from Azure DevOps to GitHub

src/TokenProviders/TokenProviderFactory.ts

@@ -0,0 +1,20 @@
+import * as ViewModels from "../Contracts/ViewModels";
+import { PlatformType } from "../PlatformType";
+import { PortalTokenProvider } from "./PortalTokenProvider";
+
+export class TokenProviderFactory {
+  private constructor() {}
+
+  public static create(): ViewModels.TokenProvider {
+    const platformType = window.dataExplorerPlatform;
+    switch (platformType) {
+      case PlatformType.Portal:
+      case PlatformType.Hosted:
+        return new PortalTokenProvider();
+      case PlatformType.Emulator:
+      default:
+        // should never get into this state
+        throw new Error(`Unknown platform ${platformType}`);
+    }
+  }
+}