<?php
// $Id$

/**
 * @file
 * Provide node fields as content.
 */

/**
 * Callback function to supply a list of content types.
 */
function ctools_node_fields_ctools_content_types() {
  return array(
    'title' => t('Node field'),
    'defaults' => array(
      'link' => TRUE,
      'created_format' => 'small',
      'updated_format' => 'small',
    ),
  );
}

/**
 * Return all block content types available.
 */
function ctools_node_fields_content_type_content_types() {
  $types = array();

  $types['title'] = array(
    'category' => t('Node'),
    'title' => t('Node title'),
    'icon' => 'icon_node.png',
    'description' => t('Title of the referenced node.'),
    'required context' => new ctools_context_required(t('Node'), 'node'),
  );
  $types['body'] = array(
    'category' => t('Node'),
    'title' => t('Node body'),
    'icon' => 'icon_node.png',
    'description' => t('Body of the referenced node.'),
    'required context' => new ctools_context_required(t('Node'), 'node'),
  );
  $types['created'] = array(
    'category' => t('Node'),
    'title' => t('Node created date'),
    'icon' => 'icon_node.png',
    'description' => t('Created date of the referenced node.'),
    'required context' => new ctools_context_required(t('Node'), 'node'),
  );
  $types['updated'] = array(
    'category' => t('Node'),
    'title' => t('Node last updated date'),
    'icon' => 'icon_node.png',
    'description' => t('Last updated date of the referenced node.'),
    'required context' => new ctools_context_required(t('Node'), 'node'),
  );

  return $types;
}

/**
 * Output function for the 'node_fields' content type.
 */
function ctools_node_fields_content_type_render($subtype, $conf, $panel_args, $context) {
  if (!empty($context) && empty($context->data)) {
    return;
  }

  $node = drupal_clone($context->data);

  $block = new stdClass();
  $block->module = 'node';
  $block->delta = $node->nid;

  switch ($subtype) {
    case 'title':
      $type = node_get_types('type', $node->type);
      $block->title = $type->title_label;
      $block->content = !empty($conf['link']) ? l($node->title, 'node/'. $node->nid) : check_plain($node->title);
      break;

    case 'body':
      $type = node_get_types('type', $node->type);
      if (!$type->has_body) {
        return;
      }
      $block->title = $type->body_label;
      $block->content = check_markup($node->body, $node->format, FALSE);
      break;

    case 'created':
      $block->title = t('Created date');
      $block->content = format_date($node->created, $conf['created_format']);
      break;

    case 'updated':
      $block->title = t('Last updated date');
      $block->content = format_date(!empty($node->updated) ? $node->updated : $node->created, $conf['updated_format']);
      break;

    default:
      return;
  }

  return $block;
}

/**
 * Returns an edit form for the custom type.
 */
function ctools_node_fields_content_type_edit_form(&$form, &$form_state) {
  $conf = $form_state['conf'];

  if ($form_state['subtype_name'] == 'title') {
    $form['link'] = array(
      '#title' => t('Link to node'),
      '#type' => 'checkbox',
      '#default_value' => $conf['link'],
      '#description' => t('Check here to make the field link to the node.'),
    );
  }

  if (in_array($form_state['subtype_name'], array('created', 'updated'))) {
    $time = time();
    $format_key = $form_state['subtype_name'] .'_format';

    $form[$format_key] = array(
      '#title' => t('Date format'),
      '#type' => 'select',
      '#options' => array(
        'small' => format_date($time, 'small'),
        'medium' => format_date($time, 'medium'),
        'large' => format_date($time, 'large'),
      ),
      '#default_value' => isset($conf[$format_key]) ? $conf[$format_key] : 'small',
    );
  }
}

/**
 * Submit handler for the node field settings form.
 */
function ctools_node_fields_content_type_edit_form_submit(&$form, &$form_state) {
  // Copy everything from our defaults.
  foreach (array_keys($form_state['plugin']['defaults']) as $key) {
    $form_state['conf'][$key] = $form_state['values'][$key];
  }
}

/**
 * Returns the administrative title for a type.
 */
function ctools_node_fields_content_type_admin_title($subtype, $conf, $context) {
  $types = ctools_node_fields_content_type_content_types();
  return t('"@s" @node-field', array('@s' => $context->identifier, '@node-field' => $types[$subtype]['title']));
}