implement call to SAP Graph

app/config.js

@@ -1,6 +1,6 @@
 // Azure AD B2C sample endpoint
 const clientId = "e760cab2-b9a1-4c0d-86fb-ff7084abd902";
-const azureADconfig = {
+const azureADconfigX = {
   clientId: clientId,
   scopes: [clientId],
   authority:
@@ -16,7 +16,7 @@ const azureADconfigCSWb2c = {
 };
 // CSWEntraID
 const clientIdCSWEntraID = "19702d90-5fb8-4d76-a6c9-557f55c771e8";
-const azureADconfigCSWEntraID = {
+const azureADconfig = {
   clientId: clientIdCSWEntraID,
   scopes: ["openid","profile","api://19702d90-5fb8-4d76-a6c9-557f55c771e8/SAP.ReadWrite"],
   authority:

app/msal-2/authPopup.js

@@ -147,4 +147,20 @@ function getBTPJWT() {
     });
 }
 
+function readProductsFromSAPGraph() {
+  getTokenPopup(tokenRequest)
+    .then((response) => {
+      callBookshop(
+        bookshopConfig.readProductsFromSAPGraphEndpoint.method,
+        bookshopConfig.readProductsFromSAPGraphEndpoint.path,
+        bookshopConfig.readProductsFromSAPGraphEndpoint?.body,
+        response.accessToken,
+        updateUI
+      );
+    })
+    .catch((error) => {
+      console.error(error);
+    });
+}
+
 selectAccount();

app/msal-2/bookshopConfig.js

@@ -6,4 +6,9 @@ const bookshopConfig = {
     method: "POST",
     body: "{}",
   },
+  readProductsFromSAPGraphEndpoint: {
+    path: "/odata/v4/catalog/readProductsFromSAPGraph",
+    method: "POST",
+    body: "{}",
+  },
 };

app/msal-2/index.html

@@ -84,6 +84,13 @@ <h5 class="card-title" id="WelcomeMessage">
             >
               get BTP JWT
             </button>
+            <button
+              class="btn btn-primary"
+              id="readProductsFromSAPGraph"
+              onclick="readProductsFromSAPGraph()"
+            >
+              Read Products from SAP Graph
+            </button>
           </div>
         </div>
       </div>

package.json

@@ -87,6 +87,13 @@
           "max": 10
         }
       },
+      "SAPGraph": {
+        "kind": "rest",
+        "credentials": {
+          "destination": "SAPGraph",
+          "requestTimeout": 30000
+        }
+      },
       "uaa": {
         "kind": "xsuaa"
       },

srv/catalog-service.cds

@@ -8,6 +8,7 @@ service CatalogService @(requires: 'authenticated-user') {
     @readonly
     entity Products as projection on external.SEPMRA_C_PD_Product;
 
-    action getBTPJWT()          returns String;
-    action readSAPLogonTicket() returns String;
+    action getBTPJWT()                returns String;
+    action readProductsFromSAPGraph() returns array of String;
+    action readSAPLogonTicket()       returns String;
 }

srv/catalog-service.js

@@ -1,6 +1,8 @@
 const cds = require("@sap/cds");
 const LOG = cds.log("catalog-service");
 const { AuthClient } = require("./AuthClient");
+const axios = require("axios");
+const { getDestination } = require("@sap-cloud-sdk/connectivity");
 
 function getAuthToken(req) {
   const authHeader = req._.req.headers["authorization"];
@@ -12,13 +14,7 @@ module.exports = async function (srv) {
   const biscuitService = await cds.connect.to("biscuit");
   const productService = await cds.connect.to("SEPMRA_PROD_MAN");
 
-  srv.on("READ", "Products", async (req) => {
-    const token = getAuthToken(req);
-    LOG.debug("Token: " + token);
-    return productService.run(req.query);
-  });
-
-  srv.on("getBTPJWT", async (req) => {
+  async function getBTPJWT(req) {
     const token = getAuthToken(req);
     const authClient = new AuthClient();
     LOG.debug("Token: " + token);
@@ -28,6 +24,45 @@ module.exports = async function (srv) {
     );
     LOG.debug("BTP Access Token: " + btpAccessToken);
     return btpAccessToken;
+  }
+
+  srv.on("READ", "Products", async (req) => {
+    const token = getAuthToken(req);
+    LOG.debug("Token: " + token);
+    return productService.run(req.query);
+  });
+
+  srv.on("getBTPJWT", async (req) => {
+    return getBTPJWT(req);
+  });
+
+  srv.on("readProductsFromSAPGraph", async (req) => {
+    const sapGraph = await cds.connect.to("SAPGraph");
+    const btpAccessToken = await getBTPJWT(req);
+    try {
+      const path =
+        "/api/s4hc/sap.s4/A_Product?$top=10&$select=Product,Brand,CountryOfOrigin&$count=true";
+      /*
+      // CAP request does not work due to authentication issue
+      const products = await sapGraph.send({
+        event: "get",
+        path,
+        headers: {
+          Authorization: `Bearer ${btpAccessToken}`,
+        },
+      });
+      */
+      const graphDest = await getDestination({ destinationName: "SAPGraph" });
+      const graphUrl = graphDest.url + path;
+      let products = await axios.get(graphUrl, {
+        headers: {
+          Authorization: `Bearer ${btpAccessToken}`,
+        },
+      });
+      return products?.data?.value;
+    } catch (error) {
+      LOG.error("Error Message: " + error.message);
+    }
   });
 
   srv.on("readSAPLogonTicket", async (req) => {