structureSelect.php

<?php

class structureselectField extends BaseField {

    public function __construct() {
      $this->type    = 'category';
      $this->icon    = 'chevron-down';
      $this->label   = 'category';
      $this->options = array();

    }
  public function options() {
      return FieldOptions::build($this);
    }
    public function option($value, $text, $selected = false) {
      return new Brick('option', $this->i18n($text), array(
        'value'    => $value,
        'selected' => $selected,
      ));
    }
    public function page() {

      $output = array();

      foreach($this->structure->fields() as $k => $v) {
        $v['name']  = $k;
        $v['value'] = '{{' . $k . '}}';
        $output[] = $v;
      }

      return $page;

    }
    	public function input() {
    		$select = new Brick('select');
    		$select->addClass('selectbox');
    		$select->attr(array(
  	      'name'         => $this->name(),
  	      'id'           => $this->id(),
  	      'required'     => $this->required(),
  	      'autocomplete' => $this->autocomplete(),
  	      'autofocus'    => $this->autofocus(),
  	      'readonly'     => $this->readonly(),
  	      'disabled'     => $this->disabled(),
  	    ));

      $select = $select->append($this->option('', '', $this->value() == ''));

    	if($this->readonly()) {
        $select->attr('tabindex', '-1');
      }


      if($this->field['page']) {
        $findpage = $this->field['page'];
        $structure = $this->field['structure'];
        $course_name = $this->field['name'];
        $course_code = $this->field['code'];
        $courses = site()->find($findpage)->$structure()->yaml();
      }

      foreach($courses as $course)  {
        $text = $course[$course_name];
        $value = $course[$course_code];
        $keys[] = $value;
        $values[] = $text;
      }
      $this->options = array_combine($keys, $values);

      foreach($this->options() as $value => $text) {
        $select->append($this->option($value, $text, $this->value() == $value));
      }

      $inner = new Brick('div');
      $inner->addClass('selectbox-wrapper');
      $inner->append($select);

      $wrapper = new Brick('div');
      $wrapper->addClass('input input-with-selectbox');
      $wrapper->append($inner);

      if($this->readonly()) {
        $wrapper->addClass('input-is-readonly');
      } else {
        $wrapper->attr('data-focus', 'true');
      }

      return $wrapper;

    }
}