Invocar las API de AEM basadas en OpenAPI mediante la autenticación de aplicación web de OAuth

...
// Callback route to exchange authorization code for access token
router.get("/callback", async (req, res) => {
  // Extracting authorization code from the query parameters
  const authorizationCode = req.query.code;

  if (!authorizationCode) {
    return res.status(400).send("Missing authorization code");
  }

  // Exchange authorization code for access token
  try {
    // Fetch access token from Adobe IMS token endpoint
    const response = await fetch(adobeIMSConfig.tokenEndpoint, {
      method: "POST",
      headers: {
        "Content-Type": "application/x-www-form-urlencoded",
        Authorization: `Basic ${Buffer.from(
          `${adobeADCConfig.clientId}:${adobeADCConfig.clientSecret}`
        ).toString("base64")}`,
      },
      body: new URLSearchParams({
        code: authorizationCode,
        grant_type: "authorization_code",
      }),
    });

    if (!response.ok) {
      console.error("Failed to fetch access token:", response.statusText);
      return res.status(500).send("Failed to fetch access token");
    }

    const data = await response.json();

    if (!data.access_token) {
      console.error("Access token missing in the response:", data);
      return res.status(500).send("Invalid response from token endpoint");
    }

    // For debugging purposes
    console.log("Access token:", data.access_token);

    // Store the access token in the session
    req.session.accessToken = data.access_token;

    // Redirect user to update product attributes
    res.redirect("/update-product-attributes");
  } catch (error) {
    console.error("Error exchanging authorization code:", error);
    res.status(500).send("Error during token exchange");
  }
});

...
// API Route: Get AEM Asset Metadata
router.get("/api/getAEMAssetMetadata", async (req, res) => {
  const assetId = req.query.assetId;
  const bucketName = getBucketName(aemAssetsConfig.hostname);

  if (!assetId || !bucketName) {
    return res.status(400).json({ error: "Missing AEM Information" });
  }

  // Get the access token from the session
  const accessToken = req.session.accessToken;

  if (!accessToken) {
    return res.status(401).json({ error: "Not Authenticated with Adobe IMS" });
  }

  try {
    const assetMetadata = await invokeGetAssetMetadataAPI(
      bucketName,
      assetId,
      accessToken
    );

    const filteredMetadata = getFilteredMetadata(JSON.parse(assetMetadata));
    res.status(200).json(filteredMetadata);
  } catch (error) {
    console.error("Error getting asset metadata:", error.message);
    res.status(500).json({ error: `Internal Server Error: ${error.message}` });
  }
});

// Helper function to invoke the AEM API to get asset metadata
async function invokeGetAssetMetadataAPI(bucketName, assetId, accessToken) {
  const apiUrl = `https://${bucketName}.adobeaemcloud.com/adobe/assets/${assetId}/metadata`;


  // For debugging purposes
  console.log("API URL:", apiUrl);
  console.log("Access Token:", accessToken);
  console.log("API Key:", adobeADCConfig.clientId);

  try {
    const response = await fetch(apiUrl, {
      method: "GET",
      headers: {
        "If-None-Match": "string",
        "X-Adobe-Accept-Experimental": "1",
        Authorization: `Bearer ${accessToken}`,
        "X-Api-Key": adobeADCConfig.clientId,
      },
    });

    console.log("Response Status:", response.status);

    if (!response.ok) {
      throw new Error(`AEM API Error: ${response.statusText}`);
    }

    return await response.text();
  } catch (error) {
    throw new Error(`Failed to fetch asset metadata: ${error.message}`);
  }
}

// Helper function to filter the metadata properties like pim: and dc:
function getFilteredMetadata(data) {
  if (!data || !data.assetMetadata) {
    throw new Error("Invalid metadata structure received from API");
  }

  const properties = data.assetMetadata;
  return Object.keys(properties).reduce((filtered, key) => {
    if (
      key.startsWith("pim:") ||
      key === "dc:title" ||
      key === "dc:description"
    ) {
      filtered[key] = properties[key];
    }
    return filtered;
  }, {});
}

// API Route: Update AEM Asset Metadata
router.post("/api/updateAEMAssetMetadata", async (req, res) => {
  const { assetId, metadata } = req.body;

  if (!assetId || !metadata || typeof metadata !== "object") {
    return res.status(400).json({ error: "Invalid or Missing Metadata" });
  }

  const bucketName = getBucketName(aemAssetsConfig.hostname);
  if (!bucketName) {
    return res.status(400).json({ error: "Missing AEM Information" });
  }

  const accessToken = req.session.accessToken;
  if (!accessToken) {
    return res.status(401).json({ error: "Not Authenticated with Adobe IMS" });
  }

  try {
    const updatedMetadata = await invokePatchAssetMetadataAPI(
      bucketName,
      assetId,
      metadata,
      accessToken
    );
    res.status(200).json(updatedMetadata);
  } catch (error) {
    console.error("Error updating asset metadata:", error.message);
    res.status(500).json({ error: `Internal Server Error: ${error.message}` });
  }
});

// Helper function to invoke the AEM API to update asset metadata
async function invokePatchAssetMetadataAPI(
  bucketName,
  assetId,
  metadata,
  accessToken
) {
  const apiUrl = `https://${bucketName}.adobeaemcloud.com/adobe/assets/${assetId}/metadata`;
  const headers = {
    "Content-Type": "application/json-patch+json",
    "If-Match": "*",
    "X-Adobe-Accept-Experimental": "1",
    Authorization: `Bearer ${accessToken}`,
    "X-Api-Key": adobeADCConfig.clientId,
  };

  try {
    const response = await fetch(apiUrl, {
      method: "PATCH",
      headers,
      body: JSON.stringify(getTransformedMetadata(metadata)),
    });

    if (!response.ok) {
      throw new Error(`AEM API Error: ${response.statusText}`);
    }

    return await response.json();
  } catch (error) {
    throw new Error(`Failed to update asset metadata: ${error.message}`);
  }
}

// Helper function to transform metadata into JSON Patch format, e.g. [{ op: "add", path: "dc:title", value: "New Title" }]
function getTransformedMetadata(metadata) {
  return Object.keys(metadata).map((key) => ({
    op: "add",
    path: `/${key}`,
    value: metadata[key],
  }));
}