<?php
// $Id: rules_admin.module,v 1.1.2.8 2010-11-25 11:14:53 fago Exp $


/**
 * @file Rules administration UI
 *
 * Only hook implementations should be inside the .module file.
 */

// Defines paths of the admin interface
define('RULES_ADMIN_PATH', 'admin/rules');
define('RULES_ADMIN_TRIGGER_PATH', RULES_ADMIN_PATH .'/trigger');
define('RULES_ADMIN_SET_PATH', RULES_ADMIN_PATH .'/rule_sets');
define('RULES_ADMIN_RULE_PATH', RULES_ADMIN_PATH .'/rules');

/**
 * Implementation of hook_help().
 */
function rules_help($path, $arg) {
  switch ($path) {
    case RULES_ADMIN_SET_PATH:
      return '<p>'. t('Rule sets are similar in concept to subroutines and can be invoked by actions or manually by code or another module.') .'</p>';

    case RULES_ADMIN_TRIGGER_PATH:
      return '<p>'. t('This is an overview about rules that are triggered by a certain event. A rule may contain conditions and actions, which are executed only when the conditions are met.') .'</p>';
  }
}

/**
 * Implementation of hook_menu().
 */
function rules_admin_menu() {
  $items = array();
  $items[RULES_ADMIN_PATH] = array(
    'title' => 'Rules',
    'description' => 'Rules administration links.',
    'position' => 'right',
    'weight' => 5,
    'page callback' => 'system_admin_menu_block_page',
    'access arguments' => array('administer rules'),
    'file' => 'system.admin.inc',
    'file path' => drupal_get_path('module', 'system'),
  );
  $items[RULES_ADMIN_PATH .'/autocomplete'] = array(
    'page callback' => 'rules_admin_categories_autocomplete',
    'access arguments' => array('administer rules'),
    'type' => MENU_CALLBACK,
    'file' => 'rules_admin.rule_forms.inc',
  );
  $items[RULES_ADMIN_TRIGGER_PATH] = array(
    'title' => 'Triggered rules',
    'description' => 'Customize your site by configuring rules that are evaluated on events.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_overview'),
    'access arguments' => array('administer rules'),
    'type' => MENU_NORMAL_ITEM,
    'weight' => -2,
    'file' => 'rules_admin.rule_forms.inc',
  );
  $items[RULES_ADMIN_TRIGGER_PATH .'/list'] = array(
    'title' => 'Overview',
    'weight' => -5,
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items[RULES_ADMIN_TRIGGER_PATH .'/add'] = array(
    'title' => 'Add a new rule',
    'type' => MENU_LOCAL_TASK,
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_add_rule', FALSE),
    'access arguments' => array('administer rules'),
    'file' => 'rules_admin.rule_forms.inc',
  );

  foreach (rules_get_items() as $item_type => $info) {
    $items[RULES_ADMIN_PATH .'/'. $item_type .'/%rules_item/delete'] = array(
      'title' => 'Delete',
      'type' => MENU_CALLBACK,
      'page callback' => 'drupal_get_form',
      'page arguments' => array('rules_admin_item_form_delete', 2, 3),
      'access arguments' => array('administer rules'),
      'load arguments' => array(2),
      'file' => 'rules_admin.sets.inc',
    );
    $items[RULES_ADMIN_PATH .'/'. $item_type .'/%rules_item/revert'] = array(
      'title' => 'Revert',
      'type' => MENU_CALLBACK,
      'page callback' => 'drupal_get_form',
      'page arguments' => array('rules_admin_item_form_revert', 2, 3),
      'access arguments' => array('administer rules'),
      'load arguments' => array(2),
      'file' => 'rules_admin.sets.inc',
    );
  }

  $items[RULES_ADMIN_PATH .'/ie'] = array(
    'title' => 'Import / Export',
    'description' => 'Export your rules as text or import rules.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_export'),
    'access arguments' => array('administer rules'),
    'file' => 'rules_admin.export.inc',
    'weight' => 5,
    'type' => MENU_NORMAL_ITEM,
  );
  $items[RULES_ADMIN_PATH .'/ie/export'] = array(
    'title' => 'Export',
    'weight' => 0,
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items[RULES_ADMIN_PATH .'/ie/import'] = array(
    'title' => 'Import',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_import'),
    'access arguments' => array('administer rules'),
    'weight' => 7,
    'type' => MENU_LOCAL_TASK,
    'file' => 'rules_admin.export.inc',
  );
  $items[RULES_ADMIN_PATH .'/settings'] = array(
    'title' => 'Settings',
    'description' => 'Set display options, show/hide Rules messages.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_settings'),
    'access arguments' => array('administer rules'),
    'file' => 'rules_admin.rule_forms.inc',
    'weight' => 7,
    'type' => MENU_NORMAL_ITEM,
  );
  //paths for modifing rules
  $items[RULES_ADMIN_RULE_PATH .'/%rule'] = array(
    'title callback' => 'rules_admin_rule_title',
    'title arguments' => array('Editing rule @label', 3),
    'type' => MENU_CALLBACK,
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_edit_rule', 3),
    'access arguments' => array('administer rules'),
    'file' => 'rules_admin.rule_forms.inc',
  );
  $items[RULES_ADMIN_RULE_PATH .'/%rule/add'] = array(
    'title' => 'Add',
    'type' => MENU_CALLBACK,
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_add', 3),
    'access arguments' => array('administer rules'),
    'file' => 'rules_admin.rule_forms.inc',
  );
  $items[RULES_ADMIN_RULE_PATH .'/%rule/edit/%rule_element'] = array(
    'title' => 'Edit',
    'type' => MENU_CALLBACK,
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_edit', 3, 5),
    'access arguments' => array('administer rules'),
    'load arguments' => array(3),
    'file' => 'rules_admin.rule_forms.inc',
  );
  $items[RULES_ADMIN_RULE_PATH .'/%rule/delete/%rule_element'] = array(
    'title' => 'Delete',
    'type' => MENU_CALLBACK,
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_delete', 3, 5),
    'access arguments' => array('administer rules'),
    'load arguments' => array(3),
    'file' => 'rules_admin.rule_forms.inc',
  );
  $items[RULES_ADMIN_RULE_PATH .'/%rule/clone'] = array(
    'title' => 'Clone rule',
    'type' => MENU_CALLBACK,
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_clone', 3),
    'access arguments' => array('administer rules'),
    'file' => 'rules_admin.rule_forms.inc',
  );
  $items[RULES_ADMIN_SET_PATH] = array(
    'title' => 'Rule sets',
    'description' => 'Create and manage rule sets.',
    'page callback' => 'rules_admin_sets_overview',
    'access arguments' => array('administer rules'),
    'type' => MENU_NORMAL_ITEM,
    'weight' => 0,
    'file' => 'rules_admin.sets.inc',
  );
  $items[RULES_ADMIN_SET_PATH .'/list'] = array(
    'title' => 'Overview',
    'weight' => -5,
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items[RULES_ADMIN_SET_PATH .'/add'] = array(
    'title' => 'Add a new rule set',
    'type' => MENU_LOCAL_TASK,
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_add_rule_set', 2),
    'access arguments' => array('administer rules'),
    'file' => 'rules_admin.sets.inc',
    'weight' => 3,
  );

  $items[RULES_ADMIN_SET_PATH .'/js'] = array(
    'type' => MENU_CALLBACK,
    'page callback' => 'rules_admin_form_js',
    'page arguments' => array('rules_admin_form_add_rule_set_add_arguments'),
    'access arguments' => array('administer rules'),
    'file' => 'rules_admin.sets.inc',
  );
  $items[RULES_ADMIN_SET_PATH .'/%rules_item'] = array(
    'type' => MENU_CALLBACK,
    'title callback' => 'rules_admin_item_title',
    'title arguments' => array(3),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_edit_rule_set', 3),
    'access arguments' => array('administer rules'),
    'load arguments' => array(2),
    'file' => 'rules_admin.sets.inc',
  );
  $items[RULES_ADMIN_SET_PATH .'/%rules_item/list'] = array(
    'title' => 'Overview',
    'weight' => -5,
    'load arguments' => array(2),
    'type' => MENU_DEFAULT_LOCAL_TASK,
  );
  $items[RULES_ADMIN_SET_PATH .'/%rules_item/add'] = array(
    'title' => 'Add a new rule',
    'type' => MENU_LOCAL_TASK,
    'page callback' => 'drupal_get_form',
    'page arguments' => array('rules_admin_form_add_rule', 3),
    'access arguments' => array('administer rules'),
    'load arguments' => array(2),
    'file' => 'rules_admin.rule_forms.inc',
  );
  return $items;
}

/**
 * Loads the admin proxy of the rule with the given name
 */
function rule_load($name) {
  static $proxies = array();

  if (!isset($proxies[$name])) {
    $proxies[$name] = FALSE;
    $rules = rules_get_configured_items('rules');
    // Let's make sure the #set actually exists
    if (isset($rules[$name]) && rules_get_rule_sets($rules[$name]['#set'])) {
      rules_include('rules_admin');
      $proxies[$name] = new rules_admin_rule_proxy($name, $rules[$name]);
      rules_admin_fix_breadcrumb($rules[$name], $name);
    }
  }
  return $proxies[$name];
}

function rule_element_load($id, $rule_name) {
  $proxy = rule_load($rule_name);
  $element = $proxy->get_element($id);
  return is_array($element) ? $element + array('#id' => intval($id)) : FALSE;
}

function rules_admin_rule_title($text, $proxy) {
  $rule = $proxy->get_rule();
  return t($text, array('@label' => $rule['#label']));
}

/**
 * Validate the machine name.
 */
function rules_admin_validate_machine_name($item_type, $element_name, $machine_name) {
  // Check that the machine name is valid. We only
  if (!preg_match('/^[a-z][a-z0-9_]*$/', $machine_name)) {
    form_set_error($element_name, t('Machine name must be alphanumeric and underscores only, and the first character must be a lower case letter.'));
    return;
  }
  // Fetch information about table.
  $info = rules_get_items($item_type);
  // Check that the machine name doesn't exist.
  $count = db_result(db_query("SELECT COUNT(*) FROM {" . $info['db_table'] . "} WHERE name = '%s'", 'rules_' . $machine_name));
  if ($count) {
    form_set_error($element_name, t('The given machine name already exists.'));
  }
}

function rules_item_load($name, $item_type) {
  $items = rules_get_configured_items($item_type);
  if (!isset($items[$name])) {
    return FALSE;
  }
  return $items[$name] + array('name' => $name);
}

function rules_admin_item_title($item) {
  return check_plain(rules_get_element_label($item));
}

/**
 * Implementation of hook_perm().
 */
function rules_admin_perm() {
  return array('administer rules');
}

/**
 * Implementation of hook_theme()
 */
function rules_admin_theme() {
  foreach (array('rules_admin_rule_render', 'rule', 'condition', 'action', 'rules_icon', 'rules_operation', 'OR', 'AND', 'rules_logical_operation_label') as $name) {
    $items[$name] = array(
      'arguments' => array('elements' => NULL),
      'file' => 'rules_admin.render.inc',
    );
  }
  $items['rules_admin_form_arguments'] = array(
    'arguments' => array('elements' => NULL),
    'file' => 'rules_admin.sets.inc',
  );
  $items['rules_admin_unsatisfied_elements'] = array(
    'arguments' => array('element' => NULL),
    'file' => 'rules_admin.inc',
  );
  $items['rules_admin_unsatisfied_elements_group'] = array(
    'arguments' => array('grouped_rules' => NULL, 'elements' => array()),
    'file' => 'rules_admin.inc',
  );
  $items['rules_admin_unsatisfied_elements_group'] = array(
    'arguments' => array('grouped_rules' => NULL, 'elements' => array()),
    'file' => 'rules_admin.inc',
  );
  $items['rules_admin_configuration_status'] = array(
    'arguments' => array('status' => NULL),
    'file' => 'rules_admin.inc',
  );
  return $items;
}