utils.ts

export async function getOAuth2AccessToken(
    clientId: string,
    clientSecret: string,
    identityTokenUrl: string
  ): Promise<string> {
    if (!clientId || !clientSecret) {
      console.log(
        "Please provide values for clientId and clientSecret. You can find more info in the tutorial at www.dangl-it.com or the BIMCloud documenation."
      );
      throw new Error("Missing clientId or clientSecret");
    }
    try {
      const tokenResponseRaw = await fetch(identityTokenUrl, {
        method: "POST",
        body: "grant_type=client_credentials&scope=bimcloud",
        headers: {
          Authorization: "Basic " + btoa(clientId + ":" + clientSecret),
          "Content-Type": "application/x-www-form-urlencoded",
        },
      });
      if (tokenResponseRaw.status !== 200) {
        throw new Error(
          "Failed to obtain an access token, status code: " +
            tokenResponseRaw.status
        );
      }
  
      const jsonResponse = await tokenResponseRaw.json();
      const accessToken = jsonResponse["access_token"];
      if (!accessToken) {
        console.log(
          "Failed to obtain an access token. Have you read the documentation and set up your OAuth2 client?"
        );
      }
  
      return accessToken;
    } catch {
      console.log(
        "Failed to obtain an access token. Have you read the documentation and set up your OAuth2 client?"
      );
  
      throw new Error("Failed to obtain an access token");
    }
  }