Google Hangouts API

Google Hangouts API

- event.space.type ==> "DM" or "ROOM"
- event.space.displayName
- event.space.name
- event.user.displayName
- event.message.text

# Events :
- MESSAGE
- ADDED_TO_SPACE
- REMOVED_FROM_SPACE


# Google authentification :

## Manually get a JWT :

let jwtClient = new google.auth.JWT(
    gkeys.client_email,
    null,
    gkeys.private_key,
    ['https://www.googleapis.com/auth/chat.bot']
);

const jwtClient = new google.auth.fromJSON(gkeys);
jwtClient.scopes = ['https://www.googleapis.com/auth/chat.bot'];

jwtClient.authorize((err, tokens) => {
    if (err) {
        console.log('Error create JWT hangoutchat');
        reject(err);
    } else {
        console.log("====>" + JSON.stringify(tokens));
        resolve(tokens.access_token);
    }
});

## Automaticaly get a JWT token or Google compute
function getAccessToken() {
    let params = {
        scopes: 'https://www.googleapis.com/auth/chat.bot'
    };
    return google
        .auth
        .getClient(params)
        .then(res => res.getAccessToken());
}

## Send a Google Hangouts message via REST API :

function postMessage() {
    return new Promise((resolve, reject) => {
        let space = '0AEz1AAAAAE';
        getAccessToken()
            .then((result) => {
                unirest.post(`https://chat.googleapis.com/v1/spaces/${space}/messages`)
                    .headers({
                        "Content-Type": "application/json",
                        "Authorization": "Bearer " + result.token
                    })
                    .send(JSON.stringify({
                        'text': 'Hello Botkit :)',
                    }))
                    .end((res) => {
                        console.log(JSON.stringify(res));
                        resolve();
                    })
            }).catch((err) => {
                reject(err);
            });
    });
}