added helloWorldStorage function

Author: amsokol

.vscode/settings.json

@@ -8,7 +8,11 @@
         "downlevel",
         "typechecking",
         "linebreak",
-        "Pubsub"
+        "Pubsub",
+        "metageneration",
+        "keyfile",
+        "bigquery",
+        "bigtable"
     ],
     "terminal.integrated.shell.windows": "C:\\Windows\\System32\\cmd.exe",
     "cSpell.enabled": true,

README.md

@@ -2,13 +2,23 @@
 
 <!-- TOC -->
 
+- [Introduction](#introduction)
 - [Clone project](#clone-project)
 - [Build project (command-line)](#build-project-command-line)
 - [Deploy project to Cloud Functions Local Emulator (command-line)](#deploy-project-to-cloud-functions-local-emulator-command-line)
 - [Build bundle to deploy to Google Cloud Platform (command-line)](#build-bundle-to-deploy-to-google-cloud-platform-command-line)
 
 <!-- /TOC -->
 
+## Introduction
+
+Cloud Functions come in two distinct variants: foreground (HTTP) and background.
+You invoke HTTP functions from standard HTTP requests.You can use background functions to handle events from your Cloud infrastructure, such as messages on a Google Cloud Pub/Sub topic, or changes in a Google Cloud Storage bucket. This project includes three example functions:
+
+- `helloWorldHTTP` - foreground (HTTP) function
+- `helloWorldPubSub` - background functions to handle Google Cloud Pub/Sub topic events
+- `helloWorldStorage` - background functions to handle events from Google Cloud Storage bucket
+
 ## Clone project
 
 Clone project from GitHub:

google-cloud.d.ts

@@ -3,12 +3,20 @@ declare namespace GoogleCloudPlatform {
     export namespace CloudFunctions {
         export interface PubsubEvent {
             eventId: string
-            timestamp: string // ISO 8601
+            timestamp: Date // ISO 8601
             eventType: string
             resource: string
             data: PubSub.PubsubMessage
         }
 
+        export interface StorageEvent {
+            eventId?: string
+            timestamp: Date // ISO 8601
+            eventType: string
+            resource: string
+            data: Storage.StorageMessage
+        }
+
         type Callback = () => void;
     }
 
@@ -50,4 +58,24 @@ declare namespace GoogleCloudPlatform {
         }
     }
 
+    export namespace Storage {
+        export interface StorageMessage {
+            kind?: string
+            resourceState?: string
+            id?: string
+            selfLink?: string
+            name?: string
+            bucket?: string
+            generation?: number
+            metageneration?: number
+            contentType?: string
+            timeCreated?: Date
+            updated?: Date
+            storageClass?: string
+            size?: number
+            md5Hash?: string
+            mediaLink?: string
+            crc32c?: string
+        }
+    }
 }

index.js

@@ -1,7 +1,13 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
+/*
+const pubsub  = require("@google-cloud/pubsub")({
+    keyFilename: "/path/to/keyfile.json",
+    projectId: "grape-spaceship-123"})
+console.log(pubsub)
+*/
 const settings = require("./settings.json");
-console.log("Function settings: " + settings);
+console.log(settings);
 function helloWorldHTTP(req, res) {
     console.log(req);
     res
@@ -12,7 +18,12 @@ function helloWorldHTTP(req, res) {
 }
 exports.helloWorldHTTP = helloWorldHTTP;
 function helloWorldPubSub(event, callback) {
-    console.log("Hello World! I have got event: ", event);
+    console.log("Hello World! I have got event from Google Cloud Pub/Sub topic: ", event.data);
     callback();
 }
 exports.helloWorldPubSub = helloWorldPubSub;
+function helloWorldStorage(event, callback) {
+    console.log("Hello World! I have got event from Google Cloud Storage bucket: ", event.data);
+    callback();
+}
+exports.helloWorldStorage = helloWorldStorage;

index.ts

@@ -1,11 +1,19 @@
 import {Request, Response} from "express"
 
 import PubsubEvent = GoogleCloudPlatform.CloudFunctions.PubsubEvent
+import StorageEvent = GoogleCloudPlatform.CloudFunctions.StorageEvent
 import Callback = GoogleCloudPlatform.CloudFunctions.Callback
 
+/*
+const pubsub  = require("@google-cloud/pubsub")({
+    keyFilename: "/path/to/keyfile.json",
+    projectId: "grape-spaceship-123"})
+console.log(pubsub)
+*/
+
 import * as settings from "./settings.json"
 
-console.log("Function settings: " + settings)
+console.log(settings)
 
 export function helloWorldHTTP(req: Request, res: Response) {
     console.log(req)
@@ -18,6 +26,11 @@ export function helloWorldHTTP(req: Request, res: Response) {
 }
 
 export function helloWorldPubSub(event: PubsubEvent, callback: Callback) {
-    console.log("Hello World! I have got event: ", event)
+    console.log("Hello World! I have got event from Google Cloud Pub/Sub topic: ", event.data)
+    callback()
+}
+
+export function helloWorldStorage(event: StorageEvent, callback: Callback) {
+    console.log("Hello World! I have got event from Google Cloud Storage bucket: ", event.data)
     callback()
 }

tslint.json

@@ -20,6 +20,7 @@
         "linebreak-style": [
             true,
             "LF"
-        ]
+        ],
+        "no-var-requires": false
     }
 }