GCF: Add Node 8 background function samples

functions/node8/index.js

@@ -207,3 +207,37 @@ exports.helloAnalytics = (data, context) => {
   console.log(`Location: ${userObj.geoInfo.city}, ${userObj.geoInfo.country}`);
 };
 // [END functions_firebase_analytics_node8]
+
+// [START functions_background_promise_node8]
+/**
+ * Background Cloud Function that returns a Promise. Note that we don't pass
+ * a "callback" argument to the function.
+ *
+ * @param {object} data The Cloud Functions event data.
+ * @returns {Promise}
+ */
+exports.helloPromise = (data) => {
+  const request = require('request-promise');
+
+  return request({
+    uri: data.endpoint
+  });
+};
+// [END functions_background_promise_node8]
+
+// [START functions_background_synchronous_node8]
+/**
+ * Background Cloud Function that returns synchronously. Note that we don't pass
+ * a "callback" argument to the function.
+ *
+ * @param {object} data The Cloud Functions event data.
+ */
+exports.helloSynchronous = (data) => {
+  // This function returns synchronously
+  if (data.something === true) {
+    return 'Something is true!';
+  } else {
+    throw new Error('Something was not true!');
+  }
+};
+// [END functions_background_synchronous_node8]

functions/node8/package.json

@@ -23,5 +23,9 @@
     "ava": "^0.25.0",
     "semistandard": "^12.0.1",
     "uuid": "^3.3.2"
+  },
+  "dependencies": {
+    "request": "^2.88.0",
+    "request-promise": "^4.2.2"
   }
 }