uploadFileToS3.js

/*****************************************
 * uploadPicturesToBucketV2
 * CURRENT WORKING VERSION
 * post base64 encoded data to server
 * This works when used in conjunction with technique from this post:
 * http://stackoverflow.com/questions/26805005/sending-binary-data-to-amazon-s3-javascript
 */
export const uploadPicturesToBucket = (fileArray, userId, jwt, loginType) => {

    let promiseArray = fileArray.map((file, index, array) => {
        let splitArray = file.name.split(".");
        let fileExtension = splitArray[splitArray.length - 1];
        return new Promise(function (resolve, reject) {
            console.log(`uploading to: ${URL}?userId=${userId}&extension=${fileExtension}
                    &version=V2&mimeType=${file.type}`);
            console.log("uploading file name : " + file.name);

            // reader technique from here:
            // https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsDataURL
            var reader = new FileReader();
            reader.addEventListener("load", function () {
                let fileData = reader.result;
                //;

                return fetch(URL + `?userId=${userId}&extension=${fileExtension}
                    &version=V2&mimeType=${file.type}`, {
                        method: 'POST',
                        body: reader.result,
                        mode: 'cors',
                        headers: new Headers({
                            'Content-Type': 'application/json',
                            'Authorization': jwt + "|" + loginType
                        })
                    })
                    .then((response) => {

                        return response.json();
                    })
                    .then((json) => {
                        console.log(json);
                        /* if (!response.ok) {
                             reject(response.statusText);
                         }*/
                        if (json.statusCode === "200") {
                            // console.log(json);
                            dropzoneUtilities.setDropzoneFileComplete(file);
                            dropzoneUtilities.removeFile(file);
                            resolve({
                                name: json.fileName,
                                userId,
                                jwt,
                                loginType
                            });
                        }
                        else {
                            reject(json.msg);
                        }
                    })
                    .catch(function (err) {
                        console.log(err);
                        reject(err);
                    });

            }, false);
            reader.readAsDataURL(file);
        });
    });

    return Promise.all(promiseArray)
}