How to use the io-functions-commons/dist/src/utils/env.getRequiredStringEnv function in io-functions-commons

} from "io-functions-commons/dist/src/models/sender_service";

import { wrapCustomTelemetryClient } from "io-functions-commons/dist/src/utils/application_insights";

import { ulidGenerator } from "io-functions-commons/dist/src/utils/strings";

// Whether we're in a production environment
const isProduction = process.env.NODE_ENV === "production";

const getCustomTelemetryClient = wrapCustomTelemetryClient(
  isProduction,
  new TelemetryClient()
);

// Setup DocumentDB
const cosmosDbUri = getRequiredStringEnv("CUSTOMCONNSTR_COSMOSDB_URI");
const cosmosDbKey = getRequiredStringEnv("CUSTOMCONNSTR_COSMOSDB_KEY");
const cosmosDbName = getRequiredStringEnv("COSMOSDB_NAME");

const documentDbDatabaseUrl = documentDbUtils.getDatabaseUri(cosmosDbName);
const profilesCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  PROFILE_COLLECTION_NAME
);
const messagesCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  MESSAGE_COLLECTION_NAME
);
const notificationsCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  NOTIFICATION_COLLECTION_NAME
);

isProduction,
  new TelemetryClient()
);

// Setup Express
const app = express();
secureExpressApp(app);

// Set up CORS (free access to the API from browser clients)
app.use(cors());

// Setup DocumentDB

const cosmosDbUri = getRequiredStringEnv("CUSTOMCONNSTR_COSMOSDB_URI");
const cosmosDbKey = getRequiredStringEnv("CUSTOMCONNSTR_COSMOSDB_KEY");
const cosmosDbName = getRequiredStringEnv("COSMOSDB_NAME");
const messageContainerName = getRequiredStringEnv("MESSAGE_CONTAINER_NAME");

const documentDbDatabaseUrl = documentDbUtils.getDatabaseUri(cosmosDbName);
const messagesCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  MESSAGE_COLLECTION_NAME
);
const messageStatusCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  MESSAGE_STATUS_COLLECTION_NAME
);
const profilesCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  PROFILE_COLLECTION_NAME
);
const servicesCollectionUrl = documentDbUtils.getCollectionUri(

const getCustomTelemetryClient = wrapCustomTelemetryClient(
  isProduction,
  new TelemetryClient()
);

// Setup Express
const app = express();
secureExpressApp(app);

// Set up CORS (free access to the API from browser clients)
app.use(cors());

// Setup DocumentDB

const cosmosDbUri = getRequiredStringEnv("CUSTOMCONNSTR_COSMOSDB_URI");
const cosmosDbKey = getRequiredStringEnv("CUSTOMCONNSTR_COSMOSDB_KEY");
const cosmosDbName = getRequiredStringEnv("COSMOSDB_NAME");
const messageContainerName = getRequiredStringEnv("MESSAGE_CONTAINER_NAME");

const documentDbDatabaseUrl = documentDbUtils.getDatabaseUri(cosmosDbName);
const messagesCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  MESSAGE_COLLECTION_NAME
);
const messageStatusCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  MESSAGE_STATUS_COLLECTION_NAME
);
const profilesCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  PROFILE_COLLECTION_NAME

const sendgridApiKey = useSendgridTransport
  ? getRequiredStringEnv("SENDGRID_API_KEY")
  : undefined;

//
// options used when converting an HTML message to pure text
// see https://www.npmjs.com/package/html-to-text#options
//

const HTML_TO_TEXT_OPTIONS: HtmlToTextOptions = {
  ignoreImage: true, // ignore all document images
  tables: true
};

// default sender for email
const MAIL_FROM = getRequiredStringEnv("MAIL_FROM_DEFAULT");

export interface INotificationDefaults {
  readonly HTML_TO_TEXT_OPTIONS: HtmlToTextOptions;
  readonly MAIL_FROM: NonEmptyString;
}

//
// Main function
//

/**
 * Input and output bindings for this function
 * see EmailNotificationsQueueHandler/function.json
 */
const ContextWithBindings = t.interface({
  bindings: t.partial({

const cosmosDbName = getRequiredStringEnv("COSMOSDB_NAME");

const documentDbDatabaseUrl = documentDbUtils.getDatabaseUri(cosmosDbName);

const notificationsCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  NOTIFICATION_COLLECTION_NAME
);

const notificationStatusCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  NOTIFICATION_STATUS_COLLECTION_NAME
);

export const WEBHOOK_NOTIFICATION_QUEUE_NAME = "webhooknotifications";
const queueConnectionString = getRequiredStringEnv("QueueStorageConnection");

// We create the db client, services and models here
// as if any error occurs during the construction of these objects
// that would be unrecoverable anyway and we neither may trig a retry
const documentClient = new DocumentDBClient(cosmosDbUri, {
  masterKey: cosmosDbKey
});

const notificationStatusModel = new NotificationStatusModel(
  documentClient,
  notificationStatusCollectionUrl
);

const notificationModel = new NotificationModel(
  documentClient,
  notificationsCollectionUrl

documentDbDatabaseUrl,
  SENDER_SERVICE_COLLECTION_NAME
);

const defaultWebhookUrl = HttpsUrl.decode(
  getRequiredStringEnv("WEBHOOK_CHANNEL_URL")
).getOrElseL(_ => {
  throw new Error(
    `Check that the environment variable WEBHOOK_CHANNEL_URL is set to a valid URL`
  );
});

// must be equal to the queue name in function.json
export const MESSAGE_QUEUE_NAME = "createdmessages";

const messageContainerName = getRequiredStringEnv("MESSAGE_CONTAINER_NAME");
const storageConnectionString = getRequiredStringEnv("QueueStorageConnection");
const queueConnectionString = getRequiredStringEnv("QueueStorageConnection");

// We create the db client, services and models here
// as if any error occurs during the construction of these objects
// that would be unrecoverable anyway and we neither may trig a retry
const documentClient = new DocumentDBClient(cosmosDbUri, {
  masterKey: cosmosDbKey
});

const messageStatusModel = new MessageStatusModel(
  documentClient,
  messageStatusCollectionUrl
);

// As we cannot use Functions bindings to do retries,

import * as winston from "winston";

import { Context } from "@azure/functions";
import { createQueueService } from "azure-storage";
import { TelemetryClient } from "io-functions-commons/dist/src/utils/application_insights";
import { getRequiredStringEnv } from "io-functions-commons/dist/src/utils/env";
import { configureAzureContextTransport } from "io-functions-commons/dist/src/utils/logging";
import { MESSAGE_QUEUE_NAME } from "./created_message_queue_handler";
import { EMAIL_NOTIFICATION_QUEUE_NAME } from "./emailnotifications_queue_handler";
import { getQueueMetadata } from "./utils/azure_queues";
import { WEBHOOK_NOTIFICATION_QUEUE_NAME } from "./webhook_queue_handler";

const queueConnectionString = getRequiredStringEnv("QueueStorageConnection");
const queueService = createQueueService(queueConnectionString);

// Whether we're in a production environment
const isProduction = process.env.NODE_ENV === "production";

const appInsightsClient = new TelemetryClient();

// needed otherwise AI will wait for the batching loop to end
// see https://github.com/Microsoft/ApplicationInsights-node.js/issues/390
// tslint:disable-next-line:no-object-mutation
appInsightsClient.config.maxBatchSize = 1;

/**
 * A function to store the length of Azure Storage Queues
 * into Application Insights Metrics.
 *

const notificationModel = new NotificationModel(
  documentClient,
  notificationsCollectionUrl
);

// As we cannot use Functions bindings to do retries,
// we resort to update the message visibility timeout
// using the queue service (client for Azure queue storage)
const queueService = createQueueService(queueConnectionString);

//
// setup NodeMailer
//
const mailupUsername = getRequiredStringEnv("MAILUP_USERNAME");
const mailupSecret = getRequiredStringEnv("MAILUP_SECRET");

//
//  setup SendGrid
//
const useSendgridTransport = process.env.USE_SENDGRID_TRANSPORT;
const sendgridApiKey = useSendgridTransport
  ? getRequiredStringEnv("SENDGRID_API_KEY")
  : undefined;

//
// options used when converting an HTML message to pure text
// see https://www.npmjs.com/package/html-to-text#options
//

const HTML_TO_TEXT_OPTIONS: HtmlToTextOptions = {
  ignoreImage: true, // ignore all document images

const cosmosDbName = getRequiredStringEnv("COSMOSDB_NAME");

const documentDbDatabaseUrl = documentDbUtils.getDatabaseUri(cosmosDbName);

const notificationsCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  NOTIFICATION_COLLECTION_NAME
);

const notificationStatusCollectionUrl = documentDbUtils.getCollectionUri(
  documentDbDatabaseUrl,
  NOTIFICATION_STATUS_COLLECTION_NAME
);

export const EMAIL_NOTIFICATION_QUEUE_NAME = "emailnotifications";
const queueConnectionString = getRequiredStringEnv("QueueStorageConnection");

// We create the db client, services and models here
// as if any error occurs during the construction of these objects
// that would be unrecoverable anyway and we neither may trig a retry
const documentClient = new DocumentDBClient(cosmosDbUri, {
  masterKey: cosmosDbKey
});

const notificationStatusModel = new NotificationStatusModel(
  documentClient,
  notificationStatusCollectionUrl
);

const notificationModel = new NotificationModel(
  documentClient,
  notificationsCollectionUrl

);

const notificationModel = new NotificationModel(
  documentClient,
  notificationsCollectionUrl
);

// As we cannot use Functions bindings to do retries,
// we resort to update the message visibility timeout
// using the queue service (client for Azure queue storage)
const queueService = createQueueService(queueConnectionString);

//
// setup NodeMailer
//
const mailupUsername = getRequiredStringEnv("MAILUP_USERNAME");
const mailupSecret = getRequiredStringEnv("MAILUP_SECRET");

//
//  setup SendGrid
//
const useSendgridTransport = process.env.USE_SENDGRID_TRANSPORT;
const sendgridApiKey = useSendgridTransport
  ? getRequiredStringEnv("SENDGRID_API_KEY")
  : undefined;

//
// options used when converting an HTML message to pure text
// see https://www.npmjs.com/package/html-to-text#options
//

const HTML_TO_TEXT_OPTIONS: HtmlToTextOptions = {