function jobFormChangeHandler() {
  if (jobFormFileElement.files.length === 0 || jobFormLanguageElement.value === "" || jobFormNameElement.value === "") {
    jobFormSubmitElement.classList.add("disabled");
  } else {
    jobFormSubmitElement.classList.remove("disabled");
  }
}


function jobFormSubmitHandler() {
  createJob(jobFormFileElement.files[0], jobFormLanguageElement.value, jobFormNameElement.value, jobFormServiceElement.value, user["id"]);
}


var jobFormElement;
var jobFormFileElement;
var jobFormLanguageElement;
var jobFormNameElement;
var jobFormServiceElement;
var jobFormSubmitElement;


jobFormElement = document.getElementById("job_form");
jobFormFileElement = document.getElementById("job_form_file");
jobFormLanguageElement = document.getElementById("job_form_language");
jobFormNameElement = document.getElementById("job_form_name");
jobFormServiceElement = document.getElementById("job_form_service");
jobFormSubmitElement =  document.getElementById("job_form_submit");


jobFormFileElement.addEventListener("change", jobFormChangeHandler);
jobFormLanguageElement.addEventListener("change", jobFormChangeHandler);
jobFormNameElement.addEventListener("input", jobFormChangeHandler);

M.Modal.init(
  document.getElementById("create_job"),
  {
    "onCloseEnd": modal => {
      jobFormElement.reset();
      M.updateTextFields();
    }
  }
);