upload.js

//TODO: Create json hash as a global variable that can be changed
//TODO: On file upload, update the new JSONDB hash
var ipfs = window.IpfsApi();
const Buffer = window.IpfsApi().Buffer;


function validateFormOnSubmit(form) {
    var reason = "";
    reason += validateAudio(form.audio.value);
    reason += validateName(form.name.value);
    reason += validateArtist(form.artist.value);

    //Some fields are empty
    if (reason != "") {
        alert("Some fields need correction:\n" + reason);
    }

    //All fields are input
    else {

        var reader = getReader();

        reader.onloadend = e => {

           //Get raw data from FileReader
           var rawData = reader.result;

           //Ipfs Add Audio File
           ipfs.add(Buffer.from(rawData), (err, result) => {
             if (err || !result) {
               console.log(`Unable to upload to IPFS API: ${err}`);
             }
             else {
               const resultHash = result[0].hash;
               alert("Success! Hash: " + resultHash);

               //Add new JSON entry
               var newJSON = newJSON(form.name.value, form.artist.value, resultHash)

               //Add JSON entry to current JSON File
               //TODO: Get the JSON file from url.

             }
           })

        }
    }
    return false;
}


function getReader() {
  var file = document.getElementById('fileuploader');

  if(file.files.length) {
    var reader = new FileReader();
    reader.readAsArrayBuffer(file.files[0]);
    return reader
  }
}

function newJSON(name, artist, hash) {
  var newJSON = JSON.stringify({
    "name": name,
    "artist": artist,
    "src": resultHash
  });
  return newJSON;
}


function validateName(name) {
      if (!name) {
        return "Name ";
      } else {
        return "";
      }
  }

function validateArtist(artist) {
      if (!artist) {
        return "Artist ";
      } else {
        return "";
      }
  }

function validateAudio(file) {
      if (!file) {
        return "Audio File ";
      } else {
        console.log(file);
        return "";
      }
  }