/**
* This code sends a text message to the user with an authentication request suggestion
* that allows the user to authenticate with OAuth. It also has a fallback text.
* Read more: https://developers.google.com/business-communications/business-messages/guides/how-to/message/send?hl=en#authentication-request-suggestion
*
* This code is based on the https://github.com/google-business-communications/nodejs-businessmessages Node.js
* Business Messages client library.
*/
/**
* Before continuing, learn more about the prerequisites for authenticating
* with OAuth at: https://developers.google.com/business-communications/business-messages/guides/how-to/integrate/oauth?hl=en
*
* Edit the values below:
*/
const PATH_TO_SERVICE_ACCOUNT_KEY = './service_account_key.json';
const CONVERSATION_ID = 'EDIT_HERE';
const OAUTH_CLIENT_ID = 'EDIT_HERE';
const OAUTH_CODE_CHALLENGE = 'EDIT_HERE';
const OAUTH_SCOPE = 'EDIT_HERE';
const businessmessages = require('businessmessages');
const uuidv4 = require('uuid').v4;
const {google} = require('googleapis');
// Initialize the Business Messages API
const bmApi = new businessmessages.businessmessages_v1.Businessmessages({});
// Set the scope that we need for the Business Messages API
const scopes = [
'https://www.googleapis.com/auth/businessmessages',
];
// Set the private key to the service account file
const privatekey = require(PATH_TO_SERVICE_ACCOUNT_KEY);
/**
* Posts a message to the Business Messages API along with an authentication request.
*
* @param {string} conversationId The unique id for this user and agent.
* @param {string} representativeType A value of BOT or HUMAN.
*/
async function sendMessage(conversationId, representativeType) {
const authClient = await initCredentials();
if (authClient) {
// Create the payload for sending a message along with an authentication request
const apiParams = {
auth: authClient,
parent: 'conversations/' + conversationId,
resource: {
messageId: uuidv4(),
representative: {
representativeType: representativeType,
},
fallback: 'Visit support.growingtreebank.com to continue.',
text: 'Sign in to continue the conversation.',
suggestions: [
{
authenticationRequest: {
oauth: {
clientId: OAUTH_CLIENT_ID,
codeChallenge: OAUTH_CODE_CHALLENGE,
scopes: [OAUTH_SCOPE]
}
}
},
],
},
};
// Call the message create function using the
// Business Messages client library
bmApi.conversations.messages.create(apiParams,
{auth: authClient}, (err, response) => {
console.log(err);
console.log(response);
});
}
else {
console.log('Authentication failure.');
}
}
/**
* Initializes the Google credentials for calling the
* Business Messages API.
*/
async function initCredentials() {
// configure a JWT auth client
const authClient = new google.auth.JWT(
privatekey.client_email,
null,
privatekey.private_key,
scopes,
);
return new Promise(function(resolve, reject) {
// authenticate request
authClient.authorize(function(err, tokens) {
if (err) {
reject(false);
} else {
resolve(authClient);
}
});
});
}
sendMessage(CONVERSATION_ID, 'BOT');
