IBM Watson Language Translator

before-publish.js

// Example languages to translate to, English, Spanish, French
// ['en', 'es', 'fr']

// require xhr module. We'll be using 3rd party http endpoint for
// translation. We need to make a get request to the endpoint with
// parameters and we will get back the translated text in response. xhr
// module will help in sending out http requests.
const xhr = require('xhr');

const query = require('codec/query_string');
const base64 = require('codec/base64');

// Store your API key securely in the vault using the MY SECRETS button
// vault get param for your IBM key should be `ibm_translate_api_key`
const vault = require('vault');

export default (request) => {
    //API key
    return vault.get('ibm_translate_api_key').then((apiKey) => {

        // translation api url
        const apiUrl = 'https://gateway.watsonplatform.net/language-translator/api/v3/translate?version=2018-05-01';

        // extract from request, channel on which the message was published
        const channel = request.channels[0];

        // language to translate to
        const outputLang = 'es'; // spanish

        // set the body's `model_id` to `input-output` format with 2 letter
        // language codes. Example: English to Spanish would be 'en-es'

        const body = {
            model_id: request.message.input_lang + '-' + outputLang,
            text: [request.message.text]
        };

        const httpOptions = {
            method: 'POST',
            headers: {
                'Authorization': 'Basic ' + base64.btoa('apikey:' + apiKey),
                'Content-Type': 'application/json'
            },
            body
        };

        // We'll invoke xhr fetch to get the HTTP response
        return xhr.fetch(apiUrl, httpOptions)
            .then(r => {
                const body = JSON.parse(r.body);
                request.message.original_text = request.message.text;
                request.message.output_lang = outputLang;
                request.message.text = body.translations[0].translation;
                return request.ok();
            })
            .catch((e) => {
                console.error(e);
                return request.abort();
            });
    });
};

input.json

{
    "text": "Hi",
    "input_lang": "en"
}

output.json

{
    "text": "Hola",
    "input_lang": "en",
    "original_text": "Hi",
    "output_lang": "es"
}