<?php

/**
 * Implementation of hook_menu().
 */
function webform_template_menu() {
  $items = array();
  // Admin Settings.
  $items['admin/settings/webform_template'] = array(
    'title' => 'Webform template settings',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('webform_template_config_form'),
    'access callback' => 'user_access',
    'access arguments' => array('administer site configuration'),
    'description' => 'Enable webform template for content types',
    'file' => 'includes/webform_template.admin.inc',
    'type' => MENU_NORMAL_ITEM,
  );

  return $items;
}

/**
 * Implements hook_form_alter().
 */
function webform_template_form_alter(&$form, &$form_state, $form_id) {
  if (isset($form['#node'])) {
    $tpl_src = array_filter(variable_get('webform_template_src', array()));
    $tpl_dest = array_filter(variable_get('webform_template_dest', array()));

    if (isset($tpl_dest[$form['type']['#value']]) && !empty($tpl_src)) {
      $show_lang = variable_get('webform_template_lang',FALSE);
      $query = "SELECT nid, title, language FROM {node} WHERE type IN (".db_placeholders($tpl_src,'varchar').") AND status = 1 ORDER BY tnid";
      $result = db_query($query, $tpl_src);


      $templates[] = '- ' . t('none') . ' -';
      while ($row = db_fetch_object($result)) {
        $templates[$row->nid] = $row->title;
        if (!empty($show_lang) && !empty($row->language)) {
          $templates[$row->nid] .= ' [' . $row->language . ']';
        }
      }

      $form['webform_template'] = array(
        '#type' => 'fieldset',
        '#title' => t('Webform'),
        '#weight' => 5,
        '#collapsible' => FALSE,
        '#collapsed' => FALSE,
      );

      $form['webform_template']['source'] = array(
        '#type' => 'select',
        '#title' => t('Templates'),
        '#options' => $templates,
        '#default_value' => 'none',
        '#description' => t('Pick a template if you want to attach a webform with predefined fields.'),
      );
      if (!empty($form['nid']['#value'])) {
        $form['webform_template']['source']['#description'] .= '<br /><strong>' . t('Setting this will overwrite any webform you previously defined!') . '</strong>';
      }

      // add a submit function before the usual submit
      array_unshift($form['#submit'], 'webform_template_submit');
    }
  }
}

/**
 * Form submission handler for node forms.
 */
function webform_template_submit($form, &$form_state) {
  if (isset($form_state['values']['source']) && is_numeric($form_state['values']['source'])) {
    $template = $form_state['values']['source'];
    if (!empty($template)) {
      $_SESSION['webform_template'] = $template;
    }
  }
}


/**
 * Implements hook_nodeapi().
 */
function webform_template_nodeapi($node, $op) {
  switch($op) {
    case 'insert': _webform_template_attach($node);
      break;
    case 'update': _webform_template_attach($node, 'delete');
      break;
  }
}


/**
 * Internal function
 * Adds webform template to a node if $_SESSION indicates a template.
 */
function _webform_template_attach($node, $op = NULL) {
  if (isset($_SESSION['webform_template'])) {

    if ($op == 'delete') {
      if (!in_array($node->type, webform_variable_get('webform_node_types'))) {
        return;
      }

      // Allow components clean up extra data, such as uploaded files.
      module_load_include('inc', 'webform', 'includes/webform.components');
      foreach ($node->webform['components'] as $cid => $component) {
        webform_component_delete($node, $component);
      }

      // Remove any trace of webform data from the database.
      db_query('DELETE FROM {webform} WHERE nid = %d', $node->nid);
      db_query('DELETE FROM {webform_component} WHERE nid = %d', $node->nid);
      db_query('DELETE FROM {webform_emails} WHERE nid = %d', $node->nid);
      db_query('DELETE FROM {webform_roles} WHERE nid = %d', $node->nid);
      db_query('DELETE FROM {webform_submissions} WHERE nid = %d', $node->nid);
      db_query('DELETE FROM {webform_submitted_data} WHERE nid = %d', $node->nid);
      db_query('DELETE FROM {webform_last_download} WHERE nid = %d', $node->nid);
    }

    $template = node_load($_SESSION['webform_template']);
    $webform = $template->webform;

    module_load_include('inc', 'webform', 'includes/webform.components');
    module_load_include('inc', 'webform', 'includes/webform.emails');

    $node->webform = $webform;
    $node->webform['nid'] = $node->nid;
    $node->webform['record_exists'] = (bool) drupal_write_record('webform', $node->webform);

    // Insert the components into the database.
    if (isset($node->webform['components']) && !empty($node->webform['components'])) {
      foreach ($node->webform['components'] as $cid => $component) {
        $component['nid'] = $node->nid;
        webform_component_insert($component);
      }
    }

    // Insert emails.
    if (isset($node->webform['emails']) && !empty($node->webform['emails'])) {
      foreach ($node->webform['emails'] as $eid => $email) {
        $email['nid'] = $node->nid;
        webform_email_insert($email);
      }
    }

    unset($_SESSION['webform_template']);
  }
}