Integrating Back In Stock with the notify me snippet

snippet-notify-me.liquid

{% form 'contact' %}
  {% if form.posted_successfully? %}
  <p class="accent-text">Thanks! We will notify you when this product becomes available!</p>
  {% else %}
  <p>Click <a id="notify-me" href="#">here</a> to be notified by email when {{ product.title }} becomes available.</p>
  {% endif %}
  {% if form.errors %}
  <div class="error feedback accent-text">
    <p>Please provide a valid email address.</p>
  </div>
  {% endif %}
  {% unless form.posted_successfully? %}
  <div id="notify-me-wrapper" class="clearfix" style="display:none; margin:10px 0;">
    {% if customer %}
    <input type="hidden" name="contact[email]" value="{{ customer.email }}" />
    {% else %}
    <input style="float:left; width:200px;" required="required" type="email" name="contact[email]" placeholder="your@email.com" class="styled-input{% if form.errors contains 'email' %} error{% endif %}" value="{{ contact.fields.email }}" />
    {% endif %}
    <input type="hidden" name="contact[body]" value="Please notify me when {{ product.title }} becomes available." />
    <input style="float:left; margin-left:5px;" class="btn styled-submit" type="submit" value="Send" />         
  </div>
  {% endunless %}
  <script>
    
  <!-- Added for Back In Stock app -->    
  $('#notify-me-wrapper [type=submit]').click(function(e) {
    e.preventDefault();
    BISPopover.create($(this).prevAll('[type=email]').val(), {{product.variants.first.id}})
          .then(function(data) { 
            if (data.status == 'OK') { alert(data.message) } 
            else { 
              var msg = [];
              for(var i in data.errors) { 
                msg.push(data.errors[i]);
              }
              alert(msg.join("\n"));
            } 
            }); 
  });
  <!-- End added for Back In Stock app -->
  
  jQuery('#notify-me').click(function() { 
    {% if customer %}
    jQuery('#sold-out form').submit(); 
    {% else %}            
    jQuery('#notify-me-wrapper').fadeIn();           
    {% endif %}
    return false;
  } );
  </script>
{% endform %}