RequestHelper.js

export const post = (url, body, successCallback, failureCallback) => {
    let requestOptions = {
        method: 'POST',
        body: body,
    };

    call(url, requestOptions, successCallback, failureCallback);
};

export const get = (url, successCallback, failureCallback) => {
    let requestOptions = {
        method: 'GET',
    };

    call(url, requestOptions, successCallback, failureCallback);
};

async function call(url, requestOptions, successCallback, failureCallback) {
    addHeaders(requestOptions);
    await modifyBody(requestOptions);
    requestOptions.redirect = 'follow';

    console.debug('data: ', requestOptions.body);
    console.debug('url: ', url);

    fetch(url, requestOptions)
        .then(response => {
            console.debug(response);
            return response.json();
        })
        .then(result => successCallback(result))
        .catch(error => failureCallback(error));
}

function addHeaders(requestOptions) {
    let myHeaders = new Headers();
    myHeaders.append('Content-Type', 'application/json');
    requestOptions.headers = myHeaders;
}

async function modifyBody(requestOptions) {
    let {body} = requestOptions;
    if (!body) {
        return;
    }
    
    let {data} = body;
    if (!data) {
        return;
    }
    
    data.apiversion = '<api-version-here>';
    data.secret = '<api-secret-here>';
    
    requestOptions.body = JSON.stringify(body);
}