<?php
// $Id$

/**
 * @file
 * Content type editing UI.
 */

/**
 * Displays the content type admin overview page.
 */
function node_overview_types() {
  $types = node_get_types();
  $names = node_get_types('names');
  $header = array(t('Name'), t('Type'), t('Description'), array('data' => t('Operations'), 'colspan' => '2'));
  $rows = array();

  foreach ($names as $key => $name) {
    $type = $types[$key];
    if (function_exists($type->module .'_form')) {
      $type_url_str = str_replace('_', '-', $type->type);
      // Populate the operations field.
      $operations = array();

      // Set the edit column.
      $operations[] = array('data' => l(t('edit'), 'admin/content/types/'. $type_url_str));

      // Set the delete column.
      if ($type->custom) {
        $operations[] = array('data' => l(t('delete'), 'admin/content/types/'. $type_url_str .'/delete'));
      }
      else {
        $operations[] = array('data' => '');
      }

      $row = array(array('data' => l($name, 'admin/content/types/'. $type_url_str), 'class' => $class), array('data' => check_plain($type->type), 'class' => $class), array('data' => check_plain($type->description), 'class' => $class));
      foreach ($operations as $operation) {
        $operation['class'] = $class;
        $row[] = $operation;
      }
      $rows[] = $row;
    }
  }

  if (empty($rows)) {
    $rows[] = array(array('data' => t('No content types available.'), 'colspan' => '5', 'class' => 'message'));
  }

  return theme('table', $header, $rows);
}

/**
 * Generates the node type editing form.
 */
function node_type_form($type = NULL) {
  if (!isset($type->type)) {
    $type = new stdClass();
    $type->type = $type->name = $type->module = $type->description = $type->help = '';
    $type->min_word_count = 0;
    $type->has_title = TRUE;
    $type->has_body = TRUE;
    $type->title_label = t('Title');
    $type->body_label = t('Body');
    $type->custom = TRUE;
    $type->modified = FALSE;
    $type->locked = FALSE;
  }

  $form['#node_type'] = $type; // Make the type object available to implementations of hook_form_alter.

  $form['identity'] = array(
    '#type' => 'fieldset',
    '#title' => t('Identification'),
  );
  $form['identity']['name'] = array(
    '#title' => t('Name'),
    '#type' => 'textfield',
    '#default_value' => $type->name,
    '#description' => t('The human-readable name of this content type. This text will be displayed as part of the list on the <em>create content</em> page. It is recommended that this name begins with a capital letter and consists only of letters, numbers, and <strong>spaces</strong>. This name must be unique to this content type.'),
    '#required' => TRUE,
  );

  if (!$type->locked) {
    $form['identity']['type'] = array(
      '#title' => t('Type'),
      '#type' => 'textfield',
      '#default_value' => $type->type,
      '#maxlength' => 32,
      '#required' => TRUE,
      '#description' => t('The machine-readable name of this content type. This text will be used for constructing the URL of the <em>create content</em> page for this content type. This name may consist of only of lowercase letters, numbers, and underscores. Dashes are not allowed. Underscores will be converted into dashes when constructing the URL of the <em>create content</em> page. This name must be unique to this content type.'),
    );
  }
  else {
    $form['identity']['type'] = array(
      '#type' => 'value',
      '#value' => $type->type,
    );
    $form['identity']['type_display'] = array(
      '#title' => t('Type'),
      '#type' => 'item',
      '#value' => theme('placeholder', $type->type),
      '#description' => t('The machine-readable name of this content type. This field cannot be modified for system-defined content types.'),
    );
  }

  $form['identity']['description'] = array(
    '#title' => t('Description'),
    '#type' => 'textarea',
    '#default_value' => $type->description,
    '#description' => t('A brief description of this content type. This text will be displayed as part of the list on the <em>create content</em> page.'),
    );

  $form['submission'] = array(
    '#type' => 'fieldset',
    '#title' =>t('Submission form'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
  );
  $form['submission']['title_label'] = array(
    '#title' => t('Title field label'),
    '#type' => 'textfield',
    '#default_value' => $type->title_label,
    '#required' => TRUE,
  );
  if (!$type->has_title) {
    // Avoid overwriting a content type that intentionally does not have a
    // title field.
    $form['submission']['title_label']['#attributes'] = array('disabled' => 'disabled');
    $form['submission']['title_label']['#description'] = t('This content type does not have a title field.');
    $form['submission']['title_label']['#required'] = FALSE;
  }
  $form['submission']['body_label'] = array(
    '#title' => t('Body field label'),
    '#type' => 'textfield',
    '#default_value' => $type->body_label,
    '#description' => t('To omit the body field for this content type, remove any text and leave this field blank.'),
  );
  $form['submission']['min_word_count'] = array(
    '#type' => 'select',
    '#title' => t('Minimum number of words'),
    '#default_value' => $type->min_word_count,
    '#options' => drupal_map_assoc(array(0, 10, 25, 50, 75, 100, 125, 150, 175, 200)),
    '#description' => t('The minimum number of words for the body field to be considered valid for this content type. This can be useful to rule out submissions that do not meet the site\'s standards, such as short test posts.')
  );
  $form['submission']['help']  = array(
    '#type' => 'textarea',
    '#title' => t('Explanation or submission guidelines'),
    '#default_value' =>  $type->help,
    '#description' => t('This text will be displayed at the top of the submission form for this content type. It is useful for helping or instructing your users.')
  );
  $form['workflow'] = array(
    '#type' => 'fieldset',
    '#title' =>t('Workflow'),
    '#collapsible' => TRUE,
  );
  $form['workflow']['node_options'] = array('#type' => 'checkboxes',
    '#title' => t('Default options'),
    '#default_value' => variable_get('node_options_'. $type->type, array('status', 'promote')),
    '#options' => array(
      'status' => t('Published'),
      'promote' => t('Promoted to front page'),
      'sticky' => t('Sticky at top of lists'),
      'revision' => t('Create new revision'),
    ),
    '#description' => t('Users with the <em>administer nodes</em> permission will be able to override these options.'),
  );

  $form['old_type'] = array(
    '#type' => 'value',
    '#value' => $type->type,
  );
  $form['orig_type'] = array(
    '#type' => 'value',
    '#value' => $type->orig_type,
  );
  $form['module'] = array(
    '#type' => 'value',
    '#value' => $type->module,
  );
  $form['custom'] = array(
    '#type' => 'value',
    '#value' => $type->custom,
  );
  $form['modified'] = array(
    '#type' => 'value',
    '#value' => $type->modified,
  );
  $form['locked'] = array(
    '#type' => 'value',
    '#value' => $type->locked,
  );

  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Save content type'),
    '#weight' => 40,
  );

  if ($type->custom) {
    if (!empty($type->type)) {
      $form['delete'] = array(
        '#type' => 'submit',
        '#value' => t('Delete content type'),
        '#weight' => 45,
      );
    }
  }
  else {
    $form['reset'] = array(
      '#type' => 'submit',
      '#value' => t('Reset to defaults'),
      '#weight' => 50,
    );
  }

  return $form;
}

/**
 * Implementation of hook_form_validate().
 */
function node_type_form_validate($form_id, $form_values) {
  $type = new stdClass();
  $type->type = trim($form_values['type']);
  $type->name = trim($form_values['name']);

  // Work out what the type was before the user submitted this form
  $old_type = trim($form_values['old_type']);

  $types = node_get_types('names');

  if (!$form_values['locked']) {
    if (isset($types[$type->type]) && $type->type != $old_type) {
      form_set_error('type', t('The machine-readable name %type is already taken.', array('%type' => $type->type)));
    }
    if (!preg_match('!^[a-z0-9_]+$!', $type->type)) {
      form_set_error('type', t('The machine-readable name can only consist of lowercase letters, underscores, and numbers.'));
    }
    // 'theme' conflicts with theme_node_form()
    // 'add' and 'list' conflict with menu paths
    // '0' is invalid, since elsewhere we check it using empty().
    if (in_array($type->type, array('0', 'theme', 'add', 'list'))) {
      form_set_error('type', t("Invalid machine-readable name. Please enter a name other than %invalid.", array('%invalid' => $type->type)));
    }
  }

  $names = array_flip($types);

  if (isset($names[$type->name]) && $names[$type->name] != $old_type) {
    form_set_error('name', t('The human-readable name %name is already taken.', array('%name' => $type->name)));
  }
}

/**
 * Implementation of hook_form_submit().
 */
function node_type_form_submit($form_id, $form_values) {
  $op = isset($form_values['op']) ? $form_values['op'] : '';

  $type = new stdClass();

  $type->type = trim($form_values['type']);
  $type->name = trim($form_values['name']);
  $type->orig_type = trim($form_values['orig_type']);
  $type->old_type = isset($form_values['old_type']) ? $form_values['old_type'] : $type->type;

  $type->description = $form_values['description'];
  $type->help = $form_values['help'];
  $type->min_word_count = $form_values['min_word_count'];
  $type->title_label = $form_values['title_label'];
  $type->body_label = $form_values['body_label'];

  // title_label is required in core; has_title will always be true, unless a
  // module alters the title field.
  $type->has_title = ($type->title_label != '');
  $type->has_body = ($type->body_label != '');

  $type->module = !empty($form_values['module']) ? $form_values['module'] : 'node';
  $type->custom = $form_values['custom'];
  $type->modified = TRUE;
  $type->locked = $form_values['locked'];

  if ($op == t('Reset to defaults')) {
    node_type_reset($type);
  }
  elseif ($op == t('Delete content type')) {
    return 'admin/content/types/'. str_replace('_', '-', $type->old_type) .'/delete';
  }

  $status = node_type_save($type);

  $variables = $form_values;

  // Remove everything that's been saved already - whatever's left is assumed
  // to be a persistent variable.
  foreach ($variables as $key => $value) {
    if (isset($type->$key)) {
      unset($variables[$key]);
    }
  }

  unset($variables['form_token'], $variables['op'], $variables['submit'], $variables['delete'], $variables['reset'], $variables['form_id']);

  // Save or reset persistent variable values.
  foreach ($variables as $key => $value) {
    $key .= '_'. $type->type;
    if ($op == t('Reset to defaults')) {
      variable_del($key);
    }
    else {
      if (is_array($value)) {
        $value = array_keys(array_filter($value));
      }
      variable_set($key, $value);

      if ($type->old_type != $type->type) {
        $key = str_replace($type->type, $type->old_type, $key);
        variable_del($key);
      }
    }
  }

  node_types_rebuild();
  // menu_rebuild clears the cache, too
  menu_rebuild();
  $t_args = array('%name' => $type->name);

  if ($op == t('Reset to defaults')) {
    drupal_set_message(t('The content type %name has been reset to its default values.', $t_args));
    return;
  }

  if ($status == SAVED_UPDATED) {
    drupal_set_message(t('The content type %name has been updated.', $t_args));
  }
  elseif ($status == SAVED_NEW) {
    drupal_set_message(t('The content type %name has been added.', $t_args));
    watchdog('node', t('Added content type %name.', $t_args), WATCHDOG_NOTICE, l(t('view'), 'admin/content/types'));
  }

  return 'admin/content/types';
}

/**
 * Implementation of hook_node_type().
 */
function node_node_type($op, $info) {
  if ($op != 'delete' && !empty($info->old_type) && $info->old_type != $info->type) {
    $update_count = node_type_update_nodes($info->old_type, $info->type);

    if ($update_count) {
      $substr_pre = 'Changed the content type of ';
      $substr_post = strtr(' from %old-type to %type.', array('%old-type' => theme('placeholder', $info->old_type), '%type' => theme('placeholder', $info->type)));
      drupal_set_message(format_plural($update_count, $substr_pre .'@count post'. $substr_post, $substr_pre .'@count posts'. $substr_post));
    }
  }
}

/**
 * Resets all of the relevant fields of a module-defined node type to their
 * default values.
 *
 * @param &$type
 *   The node type to reset. The node type is passed back by reference with its
 *   resetted values. If there is no module-defined info for this node type,
 *   then nothing happens.
 */
function node_type_reset(&$type) {
  $info_array = module_invoke_all('node_info');
  if (isset($info_array[$type->orig_type])) {
    $info = _node_type_set_defaults($info_array[$type->orig_type]);
    $info['type'] = $type->orig_type;

    foreach ($info as $field => $value) {
      $type->$field = $value;
    }
  }
}

/**
 * Menu callback; delete a single content type.
 */
function node_type_delete_confirm($type) {
  $form['type'] = array('#type' => 'value', '#value' => $type->type);
  $form['name'] = array('#type' => 'value', '#value' => $type->name);

  $message = t('Are you sure you want to delete the content type %type?', array('%type' => $type->name));
  $caption = '';

  $num_nodes = db_num_rows(db_query("SELECT * FROM {node} WHERE type = '%s'", $type->type));
  if ($num_nodes) {
    $caption .= '<p>'. strtr(format_plural($num_nodes, '<strong>Warning:</strong> there is currently @count %type post on your site. It may not be able to be displayed or edited correctly, once you have removed this content type.', '<strong>Warning:</strong> there are currently @count %type posts on your site. They may not be able to be displayed or edited correctly, once you have removed this content type.'), array('%type' => theme('placeholder', $type->name))) .'</p>';
  }

  $caption .= '<p>'. t('This action cannot be undone.') .'</p>';

  return confirm_form($form, $message, 'admin/content/types', $caption, t('Delete'));
}

/**
 * Process content type delete confirm submissions.
 */
function node_type_delete_confirm_submit($form_id, $form_values) {
  node_type_delete($form_values['type']);

  $t_args = array('%name' => $form_values['name']);
  drupal_set_message(t('The content type %name has been deleted.', $t_args));
  watchdog('menu', t('Deleted content type %name.', $t_args), WATCHDOG_NOTICE);

  node_types_rebuild();
  menu_rebuild();

  return 'admin/content/types';
}