Club Drupal

<?php

/**

 * @file Content access administration UI.

 */

/**

 * Specifies the threshold until we try to mass update node grants immediately.

 */

define('CONTENT_ACCESS_MASS_UPDATE_THRESHOLD', 1000);

/**

 * Per node settings page.

 */

function content_access_page($form, &$form_state, $node) {

  drupal_set_title(t('Access control for @title', array('@title' => $node->title)));

  foreach (_content_access_get_operations() as $op => $label) {

    $defaults[$op] = content_access_per_node_setting($op, $node);

  }

  // Get roles form

  content_access_role_based_form($form, $defaults, $node->type);

  // Add an after_build handler that disables checkboxes, which are enforced by permissions.

  $form['per_role']['#after_build'] = array('content_access_force_permissions');

  // ACL form

  if (module_exists('acl')) {

    // This is disabled when there is no node passed.

    $form['acl'] = array(

      '#type' => 'fieldset',

      '#title' => t('User access control lists'),

      '#description' => t('These settings allow you to grant access to specific users.'),

      '#collapsible' => TRUE,

      '#tree' => TRUE,

    );

    foreach (array('view', 'update', 'delete') as $op) {

      $acl_id = content_access_get_acl_id($node, $op);

      acl_node_add_acl($node->nid, $acl_id, (int) ($op == 'view'), (int) ($op == 'update'), (int) ($op == 'delete'), content_access_get_settings('priority', $node->type));

      $form['acl'][$op] = acl_edit_form($form_state, $acl_id, t('Grant !op access', array('!op' => $op)));

      $form['acl'][$op]['#collapsed'] = !isset($_POST['acl_' . $acl_id]) && !unserialize($form['acl'][$op]['user_list']['#default_value']);

    }

  }

  $form_state['node'] = $node;

  $form['reset'] = array(

    '#type' => 'submit',

    '#value' => t('Reset to defaults'),

    '#weight' => 10,

    '#submit' => array('content_access_page_reset'),

    '#access' => count(content_access_get_per_node_settings($node)) > 0,

  );

  $form['submit'] = array(

    '#type' => 'submit',

    '#value' => t('Submit'),

    '#weight' => 10,

  );

  // @todo not true anymore?

  // http://drupal.org/update/modules/6/7#hook_node_access_records

  if (!$node->status) {

    drupal_set_message(t("Warning: Your content is not published, so this settings are not taken into account as long as the content remains unpublished."), 'error');

  }

  return $form;

}

/**

 * Submit callback for content_access_page().

 */

function content_access_page_submit($form, &$form_state) {

  $settings = array();

  $node = $form_state['node'];

  foreach (_content_access_get_operations() as $op => $label) {

    // Set the settings so that further calls will return this settings.

    $settings[$op] = array_keys(array_filter($form_state['values'][$op]));

  }

  // Save per-node settings.

  content_access_save_per_node_settings($node, $settings);

  if (module_exists('acl')) {

    foreach (array('view', 'update', 'delete') as $op) {

      acl_save_form($form_state['values']['acl'][$op]);

      module_invoke_all('user_acl', $settings);

    }

  }

  // Apply new settings.

  node_access_acquire_grants($node);

  module_invoke_all('per_node', $settings);

  drupal_set_message(t('Your changes have been saved.'));

}

/**

 * Submit callback for reset on content_access_page().

 */

function content_access_page_reset($form, &$form_state) {

  content_access_delete_per_node_settings($form_state['node']);

  node_access_acquire_grants($form_state['node']);

  drupal_set_message(t('The permissions have been reseted to the content type defaults.'));

}

/**

 * Per content type settings form.

 */

function content_access_admin_settings($form, &$form_state, $content_type) {

  $type = $content_type->type;

  $form_state['type'] = $type;

  // Add role based per content type settings

  $defaults = array();

  foreach (_content_access_get_operations() as $op => $label) {

    $defaults[$op] = content_access_get_settings($op, $type);

  }

  content_access_role_based_form($form, $defaults, $type);

  // Per node:

  $form['node'] = array(

    '#type' => 'fieldset',

    '#title' => t('Per content node access control settings'),

    '#collapsible' => TRUE,

    '#description' => t('Optionally you can enable per content node access control settings. If enabled, a new tab for the content access settings appears when viewing content. You have to configure permission to access these settings at the !permissions page.', array('!permissions' => l(t('permissions'), 'admin/people/permissions'))),

  );

  $form['node']['per_node'] = array(

    '#type' => 'checkbox',

    '#title' => t('Enable per content node access control settings'),

    '#default_value' => content_access_get_settings('per_node', $type),

  );

  $form['advanced'] = array(

    '#type' => 'fieldset',

    '#title' => t('Advanced'),

    '#collapsible' => TRUE,

    '#collapsed' => TRUE,

  );

  $form['advanced']['priority'] = array(

    '#type' => 'weight',

    '#title' => t('Give content node grants priority'),

    '#default_value' => content_access_get_settings('priority', $type),

    '#description' => t('If you are only using this access control module, you can safely ignore this. If you are using multiple access control modules you can adjust the priority of this module.'),

  );

  $form['submit'] = array(

    '#type' => 'submit',

    '#value' => t('Submit'),

    '#weight' => 10,

  );

  return $form;

}

/**

 * Submit handler for per content type settings form.

 */

function content_access_admin_settings_submit($form, &$form_state) {

  $roles_permissions = user_role_permissions(user_roles());

  $permissions = user_permission_get_modules();

  $type = $form_state['type'];

  // Remove disabled modules permissions, so they can't raise exception

  // in content_access_save_permissions()

  foreach ($roles_permissions as $rid => $role_permissions) {

    foreach ($role_permissions as $permission => $value) {

      if (!array_key_exists($permission, $permissions)) {

        unset($roles_permissions[$rid][$permission]);

      }

    }

  }

  foreach (array('update', 'update_own', 'delete', 'delete_own') as $op) {

    foreach ($form_state['values'][$op] as $rid => $value) {

      $permission = content_access_get_permission_by_op($op, $form_state['type']);

      if ($value) {

        $roles_permissions[$rid][$permission] = TRUE;

      }

      else {

        $roles_permissions[$rid][$permission] = FALSE;

      }

    }

    // Don't save the setting, so its default value (get permission) is applied

    // always.

    unset($form_state['values'][$op]);

  }

  content_access_save_permissions($roles_permissions);

  // Update content access settings

  $settings = content_access_get_settings('all', $type);

  foreach (content_access_available_settings() as $setting) {

    if (isset($form_state['values'][$setting])) {

      $settings[$setting] = is_array($form_state['values'][$setting]) ? array_keys(array_filter($form_state['values'][$setting])) : $form_state['values'][$setting];

    }

  }

  content_access_set_settings($settings, $type);

  // Mass update the nodes, but only if necessary.

  if (content_access_get_settings('per_node', $type) ||

      content_access_get_settings('view', $type) != $form['per_role']['view']['#default_value'] ||

      content_access_get_settings('view_own', $type) != $form['per_role']['view_own']['#default_value'] ||

      content_access_get_settings('priority', $type) != $form['advanced']['priority']['#default_value'] ||

      content_access_get_settings('per_node', $type) != $form['node']['per_node']['#default_value']

     ) {

    // If per node has been disabled and we use the ACL integration, we have to remove possible ACLs now.

    if (!content_access_get_settings('per_node', $type) && $form['node']['per_node']['#default_value'] && module_exists('acl')) {

      _content_access_remove_acls($type);

    }

    if (content_access_mass_update(array($type))) {

      drupal_set_message(t('Permissions have been successfully rebuilt for the content type @types.', array('@types' => node_type_get_name($type))));

    }

  }

  drupal_set_message(t('Your changes have been saved.'));

}

/**

 * Mass updates node access records for nodes of the given types.

 * @param $types

 *   An array of content type names.

 * @return

 *   Whether the operation has been processed successfully (TRUE) or postponed (FALSE).

 */

function content_access_mass_update($types) {

  $q = db_select('node', 'n')

    ->fields('n', array('nid'))

    ->condition('n.type', $types, 'IN');

  $count = $q->countQuery()->execute()->fetchField();

  node_access_needs_rebuild(TRUE);

  // If there not too much nodes affected, try to do it.

  if ($count <= CONTENT_ACCESS_MASS_UPDATE_THRESHOLD) {

    $records = $q->execute();

    foreach ($records as $node) {

      node_access_acquire_grants(node_load($node->nid));

    }

    cache_clear_all();

    node_access_needs_rebuild(FALSE);

    return TRUE;

  }

  return FALSE;

}

/**

 * Saves the given permissions by role to the database.

 */

function content_access_save_permissions($roles_permissions) {

  foreach ($roles_permissions as $rid => $permissions) {

    user_role_change_permissions($rid, $permissions);

  }

}

/**

 * Builds the role based permission form for the given defaults.

 *

 * @param $defaults

 *   Array of defaults for all operations.

 */

function content_access_role_based_form(&$form, $defaults = array(), $type = NULL) {

  $form['per_role'] = array(

    '#type' => 'fieldset',

    '#title' => t('Role based access control settings'),

    '#collapsible' => TRUE,

    '#description' => t('Note that users need at least the %access_content permission to be able to deal in any way with content.', array('%access_content' => t('access content'))) .

      ' ' . t('Furthermore note that content which is not @published is treated in a different way by drupal: It can be viewed only by its author or users with the %administer_nodes permission.', array('@published' => t('published'), '%administer_nodes' => t('administer nodes'))),

  );

  $operations = _content_access_get_operations($type);

  $roles = array_map('filter_xss_admin', user_roles());

  foreach ($operations as $op => $label) {

    // Make sure defaults are set properly

    $defaults += array($op => array());

    $form['per_role'][$op] = array('#type' => 'checkboxes',

      '#prefix' => '<div class="content_access-div">',

      '#suffix' => '</div>',

      '#options' => $roles,

      '#title' => $label,

      '#default_value' => $defaults[$op],

      '#process' => array('form_process_checkboxes', 'content_access_disable_checkboxes'),

    );

  }

  $form['per_role']['clearer'] = array(

    '#value' => '<br clear="all" />',

  );

  drupal_add_css(drupal_get_path('module', 'content_access') . '/content_access.css');

  return $form;

}

/**

 * Formapi #after_build callback, that disables checkboxes for roles without access to content.

 */

function content_access_force_permissions($element, &$form_state) {

  foreach (array('update', 'update_own', 'delete', 'delete_own') as $op) {

    foreach (content_access_get_settings($op, $form_state['node']->type) as $rid) {

      $element[$op][$rid]['#disabled'] = TRUE;

      $element[$op][$rid]['#attributes']['disabled'] = 'disabled';

      $element[$op][$rid]['#value'] = TRUE;

      $element[$op][$rid]['#checked'] = TRUE;

      $element[$op][$rid]['#prefix'] = '<span' . drupal_attributes(array('title' => t("Permission is granted due to the content type's access control settings."))) . '>';

      $element[$op][$rid]['#suffix'] = "</span>";

    }

  }

  return $element;

}

/**

 * Submit callback for the user permissions form.

 * Trigger changes to node permissions to rebuild our grants.

 */

function content_access_user_admin_perm_submit($form, $form_state) {

  // Check for each content type, which has per node access activated

  // whether permissions have been changed.

  $types = array();

  foreach (array_filter(content_access_get_settings('per_node')) as $type => $value) {

    foreach (_content_access_get_node_permissions($type) as $perm) {

      foreach (user_roles() as $rid => $role) {

        if (isset($form_state['values'][$rid]) && in_array($perm, $form['checkboxes'][$rid]['#default_value']) != in_array($perm, $form_state['values'][$rid])) {

          //permission changed!

          $types[$type] = node_get_types('name', $type);

          continue 2;

        }

      }

    }

  }

  if ($types && content_access_mass_update(array_keys($types))) {

    drupal_set_message(format_plural(count($types),

      'Permissions have been successfully rebuilt for the content type @types.',

      'Permissions have been successfully rebuilt for the content types @types.',

      array('@types' => implode(', ', $types))

    ));

  }

}