cludder.module

<?php
/**
 * @file
 *
 * Defines a custom field for constructing a custom poutine.
 */

module_load_include('inc', 'cludder', 'cludder.selex');


/**
 * Implements hook_field_info().
 *
 * Here we tell Drupal about our custom fields. In this case
 * we only have one. Its machine-readable name is 'poutine_maker_poutine'
 * because the convention is 'modulename_fieldname'.
 *
 * We also define the machine names of the widget and the formatter.
 */
function cludder_field_info() {
  return array(
    'subject_field_type' => array(
      'label' => t('Subject'),
      'description' => t('Tagged by Subject'),
      'default_widget' => 'subject_widget',
      'default_formatter' => 'subject_formatter',
    ),
    'grade_field_type' => array(
      'label' => t('Grade'),
      'description' => t('Tagged by Grade'),
      'default_widget' => 'grade_widget',
      'default_formatter' => 'grade_formatter',
    ),
    'strand_field_type' => array(
      'label' => t('Strand'),
      'description' => t('Tagged by Strand'),
      'default_widget' => 'strand_widget',
      'default_formatter' => 'strand_formatter',
    ),
    'topic_field_type' => array(
      'label' => t('Topic'),
      'description' => t('Tagged by Topic'),
      'default_widget' => 'topic_widget',
      'default_formatter' => 'topic_formatter',
    ),
  );
}


/**
 * Implements hook_field_widget_info().
 *
 * Here we tell Drupal about our custom widgets. In this
 * case we only have one. As with poutine_maker_field_formatter_info(),
 * we tell Drupal which fields our widget works with (in this case, just
 * 'poutine_maker_poutine').
 */
function cludder_field_widget_info() {
  return array(
    'subject_widget' => array(
      'label' => t('Default'),
      'field types' => array('subject_field_type'),
    ),
    'grade_widget' => array(
      'label' => t('Default'),
      'field types' => array('grade_field_type'),
    ),
    'strand_widget' => array(
      'label' => t('Default'),
      'field types' => array('strand_field_type'),
    ),
    'topic_widget' => array(
      'label' => t('Default'),
      'field types' => array('topic_field_type'),
    ),
  );
}


/**
 * Implements hook_field_widget_form().
 *
 * http://api.drupal.org/api/drupal/modules--field--field.api.php/function/hook_field_widget_form/7
 *
 * Here we define a form element that the user inputs data
 * into. If we have a complex custom field, we can have many sub-elements
 * organized into fieldsets.
 */
function cludder_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {
  // $item is where the current saved values are stored
  $item =& $items[$delta];

  $subjids = array();
  if (!empty($form_state['values']['subject'])) {
    $subjids = array_filter($form_state['values']['subject']);
  }
  $gradids = array();
  if (!empty($form_state['values']['grade'])) {
    $gradids = array_filter($form_state['values']['grade']);
  }
  $strandids = array();
  if (!empty($form_state['values']['strand'])) {
    $strandids = array_filter($form_state['values']['strand']);
  }
  $topicids = array();
  if (!empty($form_state['values']['topics'])) {
    $topicids = array_filter($form_state['values']['topics']);
  }

  if ($instance['widget']['type'] == 'subject_widget') {

      $element['subjectblock'] = array(
            '#type'     => 'fieldset',
            '#title'     => 'Subjects',
      );
      $element['subjectblock']['subject'] = array(
            '#type'     => 'checkboxes',
            '#options' => grab_subjects(),
            '#prefix' => '<div style="background:#FF7F55;">',
            '#suffix' => '</div>',
            //'#default_value' => remember_subjects(),
            '#ajax' => array(
                'callback' => 'make_topic_chex_callback',
                'progress' => array('type' => 'none'),
            ),
      );

  }

  if ($instance['widget']['type'] == 'grade_widget') {

      $element['gradeblock'] = array(
            '#type'     => 'fieldset',
            '#title'     => 'Grades',
      );
      $element['gradeblock']['grade'] = array(
            '#type'     => 'checkboxes',
            '#options' => grab_grades(),
            '#prefix' => '<div style="background:#557FFF;">',
            '#suffix' => '</div>',
            '#ajax' => array(
                'callback' => 'make_topic_chex_callback',
                'progress' => array('type' => 'none'),
            ),
      );

  }

  if ($instance['widget']['type'] == 'strand_widget') {

      $element['blanx'] = array(
            '#type'     => 'markup',
            '#prefix' => '<div>',
            '#suffix' => '</div>',
      );
      if (!empty($form_state['values']['subject']) && !empty($form_state['values']['grade'])) {
          $element['strandwrap'] = array(
                '#type'     => 'markup',
                '#prefix' => '<div id="pow">',
                '#suffix' => '</div>',
          );
      }
      if (empty($form_state['values']['subject']) && empty($form_state['values']['grade'])) {
          $element['strandwrap'] = array(
                '#type'     => 'hidden',
                '#prefix' => '<div id="pow">',
                '#suffix' => '</div>',
          );
      }
      $element['strandwrap']['strandblock'] = array(
            '#type'     => 'fieldset',
            '#title'     => 'Strands',
      );
      $element['strandwrap']['strandblock']['strand'] = array(
            '#type'     => 'checkboxes',
            '#options' => grab_strands($subjids, $gradids),
            '#prefix' => '<div style="background:#FFFF2A;">',
            '#suffix' => '</div>',
            '#ajax' => array(
                'callback' => 'make_topic_chex_callback',
                'progress' => array('type' => 'none'),
            ),
      );

  }

  if ($instance['widget']['type'] == 'topic_widget') {

      if (!empty($form_state['values']['subject']) && !empty($form_state['values']['grade'])) {
          $element['topwrap'] = array(
                '#type'     => 'markup',
                '#prefix' => '<div id="gunge">',
                '#suffix' => '</div>',
          );
      }
      if (empty($form_state['values']['subject']) && empty($form_state['values']['grade'])) {
          $element['topwrap'] = array(
                '#type'     => 'hidden',
                '#prefix' => '<div id="gunge">',
                '#suffix' => '</div>',
          );
      }
      $element['topwrap']['topblock'] = array(
                '#type'   => 'fieldset',
                '#title'  => 'Topics',
      );
      $element['topwrap']['topblock']['topics'] = array(
            '#type'     => 'checkboxes',
            '#options' => grab_topics($subjids, $gradids, $strandids),
            '#prefix' => '<div style="background:#FFAA00;">',
            '#suffix' => '</div>',
      );

  }

  return $element;

}

function make_topic_chex_callback(&$form, $form_state) {
    $parents_subject = $form_state['subject']['#parents'];
    $parents_grade = $form_state['grade']['#parents'];
    $commands = array();
    $subz = array_filter($form_state['values']['subject']);
    $grdz = array_filter($form_state['values']['grade']);
    $isempty_subz = $subz ? 'TRUE' : 'FALSE';
    $isempty_grdz = $grdz ? 'TRUE' : 'FALSE';
    if ($isempty_subz == 'TRUE' && $isempty_grdz == 'TRUE' ) {
        $commands[] = ajax_command_replace("#gunge", render($form['topwrap']));
    }
    else {
        $commands[] = ajax_command_replace("#gunge", "<div id='gunge'>");
    }
    if ($isempty_subz == 'TRUE' && (in_array(15, $grdz) || in_array(16, $grdz)) ) {
        $commands[] = ajax_command_replace("#pow", render($form['strandwrap']));
    }
    else {
        $commands[] = ajax_command_replace("#pow", "<div id='pow'>");
    }
    return array('#type' => 'ajax', '#commands' => $commands);
}