collect-form.js

'use strict';

function collectForm(form) {
  var q = {};
  var i;
  var j;

  if (!form || form.nodeName !== 'FORM') {
    return null;
  }

  for (i = form.elements.length - 1; i >= 0; i--) {
    if (form.elements[i].name === '') {
      continue;
    }

    switch (form.elements[i].nodeName) {
      case 'INPUT':
        switch (form.elements[i].type) {
          case 'text':
          case 'email':
          case 'hidden':
          case 'password':
          case 'button':
          case 'reset':
          case 'submit':
            q[form.elements[i].name] = form.elements[i].value;
            break;
          case 'checkbox':
          case 'radio':
            if (form.elements[i].checked) {
              q[form.elements[i].name] = form.elements[i].value;
            }
            break;
          default:
            break;
        }
        break;
      case 'file':
        break;
      case 'TEXTAREA':
        q[form.elements[i].name] = form.elements[i].value;
        break;
      case 'SELECT':
        switch (form.elements[i].type) {
          case 'select-one':
            q[form.elements[i].name] = form.elements[i].value;
            break;
          case 'select-multiple':
            for (j = form.elements[i].options.length - 1; j >= 0; j--) {
              if (form.elements[i].options[j].selected) {
                if (q[form.elements[i].name]) {
                  q[form.elements[i].name].push(form.elements[i].options[j].value);
                } else {
                  q[form.elements[i].name] = [form.elements[i].options[j].value];
                }
              }
            }
            break;
          default:
            break;
        }
        break;
      case 'BUTTON':
        switch (form.elements[i].type) {
          case 'reset':
          case 'submit':
          case 'button':
            q[form.elements[i].name] = form.elements[i].value;
            break;
          default:
            break;
        }
        break;
      default:
        break;
    }
  }

  return q;
};