<?php

/*
 +--------------------------------------------------------------------+
 | CiviCRM version 4.5                                                |
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC (c) 2004-2014                                |
 +--------------------------------------------------------------------+
 | This file is a part of CiviCRM.                                    |
 |                                                                    |
 | CiviCRM is free software; you can copy, modify, and distribute it  |
 | under the terms of the GNU Affero General Public License           |
 | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
 |                                                                    |
 | CiviCRM is distributed in the hope that it will be useful, but     |
 | WITHOUT ANY WARRANTY; without even the implied warranty of         |
 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
 | See the GNU Affero General Public License for more details.        |
 |                                                                    |
 | You should have received a copy of the GNU Affero General Public   |
 | License and the CiviCRM Licensing Exception along                  |
 | with this program; if not, contact CiviCRM LLC                     |
 | at info[AT]civicrm[DOT]org. If you have questions about the        |
 | GNU Affero General Public License or the licensing of CiviCRM,     |
 | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
 +--------------------------------------------------------------------+
 */

/**
 * File for the CiviCRM APIv3 custom group functions
 *
 * @package CiviCRM_APIv3
 * @subpackage API_CustomField
 *
 * @copyright CiviCRM LLC (c) 2004-2014
 * @version $Id: CustomField.php 30879 2010-11-22 15:45:55Z shot $
 */

/**
 * Most API functions take in associative arrays ( name => value pairs
 * as parameters. Some of the most commonly used parameters are
 * described below
 *
 * @param array $params           an associative array used in construction
 * retrieval of the object
 *
 */

/**
 * Create a 'custom field' within a custom field group.
 * We also empty the static var in the getfields
 * function after deletion so that the field is available for us (getfields manages date conversion
 * among other things
 *
 * @param $params array  Associative array of property name/value pairs to create new custom field.
 *
 * @return Newly API success object
 *
 * @access public
 *
 * @example CustomFieldCreate.php
 * {@getfields CustomField_create}
 * {@example CustomFieldCreate.php 0}
 *
 */
function civicrm_api3_custom_field_create($params) {

  // Array created for passing options in params
  if (isset($params['option_values']) && is_array($params['option_values'])) {
    foreach ($params['option_values'] as $key => $value) {
      $params['option_label'][$key] = $value['label'];
      $params['option_value'][$key] = $value['value'];
      $params['option_status'][$key] = $value['is_active'];
      $params['option_weight'][$key] = $value['weight'];
    }
  }
  $values = array();
  $customField = CRM_Core_BAO_CustomField::create($params);
  _civicrm_api3_object_to_array_unique_fields($customField, $values[$customField->id]);
  _civicrm_api3_custom_field_flush_static_caches();
  return civicrm_api3_create_success($values, $params, 'custom_field', $customField);
}

/**
 * Flush static caches in functions that might have stored available custom fields
 */
function _civicrm_api3_custom_field_flush_static_caches(){
  civicrm_api('custom_field', 'getfields', array('version' => 3, 'cache_clear' => 1));
  CRM_Core_BAO_UFField::getAvailableFieldsFlat(TRUE);
}
/**
 * Adjust Metadata for Create action
 *
 * @param array $params array or parameters determined by getfields
 */
function _civicrm_api3_custom_field_create_spec(&$params) {
  $params['label']['api.required'] = 1;
  $params['custom_group_id']['api.required'] = 1;
  $params['is_active']['api.default'] = 1;
  $params['option_type'] = array(
    'title' => 'This (boolean) field tells the BAO to create an option group for the field if the field type is appropriate',
    'api.default' => 1,
    'type' => CRM_Utils_Type::T_BOOLEAN,
  );
  $params['data_type']['api.default'] = 'String';
  $params['is_active']['api.default'] = 1;
}

/**
 * Use this API to delete an existing custom group field.
 *
 * @param $params     Array id of the field to be deleted
 *
 * @return array
 * @example CustomFieldDelete.php
 *
 * {@example CustomFieldDelete.php 0}
 * {@getfields CustomField_delete}
 * @access public
 **/
function civicrm_api3_custom_field_delete($params) {

  $field = new CRM_Core_BAO_CustomField();
  $field->id = $params['id'];
  $field->find(TRUE);
  $customFieldDelete = CRM_Core_BAO_CustomField::deleteField($field);
  civicrm_api('custom_field', 'getfields', array('version' => 3, 'cache_clear' => 1));
  return $customFieldDelete ? civicrm_api3_create_error('Error while deleting custom field') : civicrm_api3_create_success();
}

/**
 * Use this API to get existing custom fields.
 *
 * @param array $params Array to search on
 *{*
 *
 * @return array
@getfields CustomField_get}
 * @access public
 *
 **/
function civicrm_api3_custom_field_get($params) {
  return _civicrm_api3_basic_get(_civicrm_api3_get_BAO(__FUNCTION__), $params);
}

/*
 * Helper function to validate custom field values
 *
 * @params Array   $params             Custom fields with values
 * @params Array   $errors             Reference fields to be check with
 * @params Boolean $checkForDisallowed Check for disallowed elements
 *                                     in params
 * @params Boolean $checkForRequired   Check for non present required elements
 *                                     in params
 * @return Array  Validation errors
 */

/**
 * Helper function to validate custom field value
 *
 * @params String $fieldName    Custom field name (eg: custom_8 )
 * @params Mixed  $value        Field value to be validate
 * @params Array  $fieldDetails Field Details
 * @params Array  $errors       Collect validation  errors
 *
 * @param $fieldName
 * @param $value
 * @param $fieldDetails
 * @param array $errors
 *
 * @return Array  Validation errors
 * @todo remove this function - not in use but need to review functionality before
 * removing as it might be useful in wrapper layer
 */
function _civicrm_api3_custom_field_validate_field($fieldName, $value, $fieldDetails, &$errors = array(
  )) {
    return;
    //see comment block
  if (!$value) {
    return $errors;
  }

  $dataType = $fieldDetails['data_type'];
  $htmlType = $fieldDetails['html_type'];

  switch ($dataType) {
    case 'Int':
      if (!CRM_Utils_Rule::integer($value)) {
        $errors[$fieldName] = 'Invalid integer value for ' . $fieldName;
      }
      break;

    case 'Float':
      if (!CRM_Utils_Rule::numeric($value)) {
        $errors[$fieldName] = 'Invalid numeric value for ' . $fieldName;
      }
      break;

    case 'Money':
      if (!CRM_Utils_Rule::money($value)) {
        $errors[$fieldName] = 'Invalid numeric value for ' . $fieldName;
      }
      break;

    case 'Link':
      if (!CRM_Utils_Rule::url($value)) {
        $errors[$fieldName] = 'Invalid link for ' . $fieldName;
      }
      break;

    case 'Boolean':
      if ($value != '1' && $value != '0') {
        $errors[$fieldName] = 'Invalid boolean (use 1 or 0) value for ' . $fieldName;
      }
      break;

    case 'Country':
      if (empty($value)) {
        break;
      }
      if ($htmlType != 'Multi-Select Country' && is_array($value)) {
        $errors[$fieldName] = 'Invalid country for ' . $fieldName;
        break;
      }

      if (!is_array($value)) {
        $value = array($value);
      }

      $query = "SELECT count(*) FROM civicrm_country WHERE id IN (" . implode(',', $value) . ")";
      if (CRM_Core_DAO::singleValueQuery($query) < count($value)) {
        $errors[$fieldName] = 'Invalid country(s) for ' . $fieldName;
      }
      break;

    case 'StateProvince':
      if (empty($value)) {
        break;
      }

      if ($htmlType != 'Multi-Select State/Province' && is_array($value)) {
        $errors[$fieldName] = 'Invalid State/Province for ' . $fieldName;
        break;
      }

      if (!is_array($value)) {
        $value = array($value);
      }

      $query = "
SELECT count(*)
  FROM civicrm_state_province
 WHERE id IN ('" . implode("','", $value) . "')";
      if (CRM_Core_DAO::singleValueQuery($query) < count($value)) {
        $errors[$fieldName] = 'Invalid State/Province for ' . $fieldName;
      }
      break;

    case 'ContactReference':
      //FIX ME
      break;
  }

  if (in_array($htmlType, array(
    'Select', 'Multi-Select', 'CheckBox', 'Radio', 'AdvMulti-Select')) &&
    !isset($errors[$fieldName])
  ) {
    $options = CRM_Core_OptionGroup::valuesByID($fieldDetails['option_group_id']);
    if (!is_array($value)) {
      $value = array($value);
    }

    $invalidOptions = array_diff($value, array_keys($options));
    if (!empty($invalidOptions)) {
      $errors[$fieldName] = "Invalid option(s) for field '{$fieldName}': " . implode(',', $invalidOptions);
    }
  }

  return $errors;
}