<?php
// $Id: form_builder_examples.module,v 1.10 2009/01/15 19:04:34 quicksketch Exp $

/**
 * @file form_builder_examples.module
 * Sample implementations of form_builder.
 */

/**
 * Implementation of hook_menu().
 */
function form_builder_examples_menu() {
  $items = array();

  $items['form-builder-example'] = array(
    'title' => 'Form builder example',
    'page callback' => 'form_builder_interface',
    'page arguments' => array('example', 'sample'),
    'file' => 'includes/form_builder.admin.inc',
    'file path' => drupal_get_path('module', 'form_builder'),
    'access arguments' => array('access content'),
    'type' => MENU_NORMAL_ITEM,
  );

  $items['form-builder-example/edit'] = array(
    'title' => 'Edit',
    'page callback' => 'form_builder_interface',
    'page arguments' => array('example', 'sample'),
    'file' => 'includes/form_builder.admin.inc',
    'file path' => drupal_get_path('module', 'form_builder'),
    'access arguments' => array('access content'),
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );

  $items['form-builder-example/import'] = array(
    'title' => 'Import',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('form_builder_examples_import_form'),
    // TODO: Make a form import.
    'access callback' => FALSE,
    'access arguments' => array('access content'),
    'type' => MENU_LOCAL_TASK,
  );

  $items['form-builder-example/export'] = array(
    'title' => 'Export',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('form_builder_examples_export_form'),
    'access arguments' => array('access content'),
    'type' => MENU_LOCAL_TASK,
  );

  return $items;
}

/**
 * A sample form array for testings.
 */
function form_builder_examples_example() {
  $form = array(
    'sample_textfield' => array(
      '#form_builder' => array(
        'element_id' => 'sample_textfield',
        'element_type' => 'textfield',
        'configurable' => TRUE,
        'removable' => TRUE,
      ),
      '#type' => 'textfield',
      '#title' => 'Sample textfield',
      '#default_value' => 'a sample value',
      '#field_prefix' => 'Prefix: ',
      '#field_suffix' => ' :Suffix',
      '#size' => 20,
      '#weight' => 0,
    ),
    'sample_checkboxes' => array(
      '#form_builder' => array(
        'element_id' => 'sample_checkboxes',
        'element_type' => 'checkboxes',
        'configurable' => TRUE,
        'removable' => TRUE,
      ),
      '#type' => 'checkboxes',
      '#title' => 'Sample checkboxes',
      '#options' => array('one' => 'one', 'two' => 'two', 'three' => 'three'),
      '#default_value' => array('two'),
      '#weight' => 1,
      '#multiple' => 1,
    ),
    'sample_textarea' => array(
      '#form_builder' => array(
        'element_id' => 'sample_textarea',
        'element_type' => 'textarea',
        'configurable' => TRUE,
        'removable' => TRUE,
      ),
      '#type' => 'textarea',
      '#title' => 'Sample textarea',
      '#default_value' => 'Text area sample value',
      '#weight' => 2,
    ),
    'sample_radios' => array(
      '#form_builder' => array(
        'element_id' => 'sample_radios',
        'element_type' => 'radios',
        'configurable' => TRUE,
        'removable' => TRUE,
      ),
      '#type' => 'radios',
      '#title' => 'Sample radios',
      '#options' => array('one' => 'one', 'two' => 'two', 'three' => 'three'),
      '#default_value' => 'two',
      '#weight' => 3,
    ),
    'sample_select' => array(
      '#form_builder' => array(
        'element_id' => 'sample_select',
        'element_type' => 'select',
        'configurable' => TRUE,
        'removable' => TRUE,
      ),
      '#type' => 'select',
      '#title' => 'Sample select',
      '#options' => array('one' => 'one', 'two' => 'two', 'three' => 'three'),
      '#default_value' => 'two',
      '#weight' => 4,
      '#multiple_toggle' => TRUE,
    ),
  );

  return $form;
}

/**
 * Implementation of hook_form_builder_field_access().
 */
function form_builder_examples_form_builder_field_access($op, $form_type, $form_id, $element) {
  // If desiring to add extra access permissions return FALSE if access is denied.
  // return user_access('administer content types');
}

/**
 * Implementation of hook_form_builder_types().
 *
 * Define the supported fields and properties supported by CCK.
 */
function form_builder_examples_form_builder_types() {
  $fields = array();

  $fields['fieldset'] = array(
    'title' => t('Fieldset'),
    'properties' => array(
      'title',
      'description',
      'collapsible',
      'collapsed',
    ),
    'default' => array(
      '#title' => t('New fieldset'),
      '#type' => 'fieldset',
      '#collapsible' => TRUE,
      '#collapsed' => FALSE,
    ),
  );

  $fields['number'] = array(
    'title' => t('Number'),
    'properties' => array(
      'title',
      'description',
      'field_prefix',
      'field_suffix',
      'default_value',
      'required',
    ),
    // TODO: how to handle validate functions?
    'validate' => array(
      'number',
    ),
    'default' => array(
      '#key' => 'number',
      '#title' => t('New number'),
      '#type' => 'textfield',
    ),
  );

  $fields['select'] = array(
    'title' => t('Select list'),
    'properties' => array(
      'title',
      'description',
      'default_value',
      'required',
      'options',
      'multiple', // Handled by options element.
      'key_type', // Handled by options element.
    ),
    'default' => array(
      '#title' => t('New select list'),
      '#type' => 'select',
      '#options' => array('1' => 'one', '2' => 'two', '3' => 'three'),
      '#multiple_toggle' => TRUE,
      '#key_type' => 'associative',
    ),
  );

  // TODO: Merge checkbox with checkboxes?
  /*
  $fields['checkbox'] = array(
    'title' => t('Checkbox'),
    'properties' => array(
      'title',
      'description',
      'return_value',
      'default_value',
      'required',
     ),
    'default' => array(
      '#title' => t('New checkbox'),
      '#type' => 'checkbox',
    ),
  );
  */

  $fields['checkboxes'] = array(
    'title' => t('Checkboxes'),
    'properties' => array(
      'title',
      'description',
      'default_value',
      'required',
      'options',
      'multiple',
      'key_type', // Handled by options element.
    ),
    'default' => array(
      '#title' => t('New checkboxes'),
      '#type' => 'checkboxes',
      '#options' => array('one' => 'one', 'two' => 'two', 'three' => 'three'),
    ),
  );

  $fields['radios'] = array(
    'title' => t('Radios'),
    'properties' => array(
      'title',
      'description',
      'default_value',
      'required',
      'options',
      'key_type', // Handled by options element.
    ),
    'default' => array(
      '#title' => t('New radios'),
      '#type' => 'radios',
      '#options' => array('one' => 'one', 'two' => 'two', 'three' => 'three'),
    ),
  );

  $fields['textfield'] = array(
    'title' => t('Textfield'),
    'properties' => array(
      'title',
      'description',
      'field_prefix',
      'field_suffix',
      'default_value',
      'required',
      'size',
    ),
    'default' => array(
      '#title' => t('New textfield'),
      '#type' => 'textfield',
    ),
  );

  $fields['textarea'] = array(
    'title' => t('Textarea'),
    'properties' => array(
      'title',
      'description',
      'default_value',
      'required',
      'rows',
      'cols',
      'input_format',
    ),
    'default' => array(
      '#title' => t('New textarea'),
      '#type' => 'textarea',
    ),
  );

  $fields['file'] = array(
    'title' => t('File'),
    'properties' => array(
      'title',
      'description',
      'required',
      'size',
      'file_extension_validate',
      'file_size_validate',
    ),
    'default' => array(
      '#title' => t('New file'),
      '#type' => 'file',
      '#size' => 30,
    ),
  );

  $fields['image'] = array(
    'title' => t('Image'),
    'properties' => array(
      'title',
      'description',
      'required',
    ),
    'validate' => array(
      'file_extension_validate',
      'file_size_validate',
      'file_image_size',
    ),
    'default' => array(
      '#title' => t('New image'),
      '#type' => 'file',
      '#size' => 30,
    ),
  );

  return array(
    'example' => $fields,
  );
}

/**
 * Implementation of hook_form_builder_preview_alter().
 */
function form_builder_examples_form_builder_preview_alter($element, $form_type, $form_id) {
  if ($form_type == 'form_builder_examples') {
    if (isset($element['#description'])) {
      $element['#description'] = filter_xss($element['#description']);
    }
  }
}

/**
 * Implementation of hook_form_builder_load().
 *
 * Convert a CCK content type into a standard form builder array.
 *
 * @param $form_id
 *   The unique identifier for the form being edited. For CCK, this is the
 *   content type name.
 */
function form_builder_examples_form_builder_load($form_type, $form_id) {
  if ($form_type == 'example') {
    $form = form_builder_examples_example();

    return $form;
  }
}

/**
 * Implementation of hook_form_builder_save().
 *
 * Take a form builder array and save it to the content type.
 */
function form_builder_examples_form_builder_save($form, $form_type, $form_id) {
  if ($form_type == 'example') {
    // Save the settings based on the changes to the $form array.
  }
}

/**
 * Menu callback for importing an entire FAPI array.
 */
function form_builder_examples_import_form(&$form_state) {
  $form = array();

  $form['import'] = array(
    '#type' => 'textarea',
    '#title' => t('Import code'),
  );

  return $form;
}

/**
 * Menu callback for exporting an entire FAPI array.
 */
function form_builder_examples_export_form() {
  module_load_include('inc', 'form_builder', 'includes/form_builder.api');
  module_load_include('inc', 'form_builder', 'includes/form_builder.cache');

  $form = array();

  $current = form_builder_cache_load('example', 'sample');

  $form['export'] = array(
    '#type' => 'textarea',
    '#title' => t('Export code'),
    '#default_value' => form_builder_examples_export($current),
    '#attributes' => array('readonly' => 'readonly', 'style' => 'font-family: monospace;'),
    '#rows' => 20,
  );

  return $form;
}


function form_builder_examples_export($form) {
  $output = '';
  $output .= form_builder_examples_export_recurse($form);
  $output .= 'return $form;';
  return $output;
}

/**
 * Recursive function for pretty-printing of FAPI arrays.
 */
function form_builder_examples_export_recurse($form, $parents = array()) {
  $output = '';

  // Sort this level of the array according to weight.
  uasort($form, 'element_sort');

  // Print out this parent element and it's properties.
  $properties = element_properties($form);
  $omit = array('#form_builder', '#key');
  if (count($properties)) {
    $output .= form_builder_examples_export_variable_name($parents) . " = array(\n";
    foreach (element_properties($form) as $property) {
      if (!in_array($property, $omit)) {
        if (is_array($form[$property])) {
          $output .= "  '". $property . "' => array(\n";
          foreach ($form[$property] as $key => $value) {
            $output .= "    '" . $key . "' => '". $value ."',\n";
          }
          $output .= "  ),\n";
        }
        else {
          $output .= "  '". $property . "' => '" . $form[$property] ."',\n";
        }
      }
    }
    $output .= ");\n";
  }
  else {
    $output .= form_builder_examples_export_variable_name($parents) . " = array();\n";
  }

  foreach (element_children($form) as $key) {
    $parents[] = $key;
    $output .= form_builder_examples_export_recurse($form[$key], $parents);
    array_pop($parents);
  }

  return $output;
}


function form_builder_examples_export_variable_name($parents) {
  $output = '$form';
  foreach ($parents as $parent) {
    $output .= "['". $parent ."']";
  }
  return $output;
}