Migrated to TypeScript.

src/graph/auth.ts

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: MIT
+
+import { Client } from "@microsoft/microsoft-graph-client";
+import { acquireResourceTokenFromLogin } from "../azure/index.ts";
+
+type GraphClientOptions = {
+  tenantId?: string;
+  clientId?: string;
+};
+
+type GraphApiToken = {
+  accessToken: string;
+  [key: string]: unknown;
+};
+
+export async function getGraphClient({ tenantId, clientId }: GraphClientOptions): Promise<{ graphApiToken: GraphApiToken; client: any }> {
+  const graphApiToken = await acquireResourceTokenFromLogin({
+    tenantId,
+    clientId,
+    resource: "graph",
+  }) as GraphApiToken;
+
+  const client = Client.init({
+    authProvider: (done) => {
+      done(null, graphApiToken.accessToken);
+    },
+  });
+
+  return { graphApiToken, client };
+}