raby/resources/views/home/indice.blade.php

<div class="ui container" id="indice">
  <div class="ui stackable grid">
    <div class="row">
      <div class="ten wide column img"></div>
      <div class="six wide column contenido">
        <div class="titulo">
          INDICES EN LINEA
        </div>
        <br />
        <form class="ui form" method="post" action="#" id="form_indices">
          <div class="field">
            <div class="ui calendar" id="indices_calendar">
              <div class="ui input left icon">
                <i class="calendar icon"></i>
                <input type="text" name="calendar" placeholder="Mes / Año" />
              </div>
            </div>
          </div>
          <a href="#" id="indices_descarga">
            <button class="ui right floated inverted dark-blue button">DESCARGA</button>
          </a>
        </form>
      </div>
    </div>
  </div>
</div>

@push('styles')
  <style type="text/css">
    #indice .img {
      background-image: url("{{$urls->assets->images}}/escrituras.jpg")
    }
  </style>
@endpush

@push('scripts')
  <script type="text/javascript">
    $(document).ready(function() {
      var file_url = ''
      $('#indices_calendar').calendar({
        type: 'month',
        text: {
          months: [
            '{!!implode("', '", $months->full)!!}'
          ],
          monthsShort: [
            '{!!implode("', '", $months->short)!!}'
          ]
        },
        onChange: function() {
          var months = [
            '{!!implode("', '", $months->full)!!}'
          ]
          var date = arguments[0]
          var test = 'indices_' + date.getFullYear() + '_' + months[date.getMonth()]
          $.getJSON('{{$urls->base}}/documentos/existe/' + test, function(data) {
            if (data.existe) {
              var url = '{{$urls->uploads}}/indices_' + date.getFullYear() + '_' + months[date.getMonth()] + '.pdf'
              $('#indices_descarga').attr('href', url).show()
              file_url = url
              return
            }
            $('#indices_descarga').attr('href', '').hide()
            file_url = ''
          })
        }
      })
      $('#indices_descarga').hide()
      $('#form_indices').submit(function(e) {
        e.preventDefault()
        window.open(file_url, '_blank')
        return false
      })
    })
  </script>
@endpush