<?php
/*
 +--------------------------------------------------------------------+
 | CiviCRM version 4.7                                                |
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC (c) 2004-2017                                |
 +--------------------------------------------------------------------+
 | 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        |
 +--------------------------------------------------------------------+
 */

/**
 *
 * @package CRM
 * @copyright CiviCRM LLC (c) 2004-2017
 */
class CRM_Activity_BAO_Query {

  /**
   * Build select for Case.
   *
   * @param CRM_Contact_BAO_Query $query
   */
  public static function select(&$query) {
    if (!empty($query->_returnProperties['activity_id'])) {
      $query->_select['activity_id'] = 'civicrm_activity.id as activity_id';
      $query->_element['activity_id'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['activity_type_id'])) {
      $query->_select['activity_type_id'] = 'activity_type.value as activity_type_id';
      $query->_element['activity_type_id'] = 1;
      $query->_tables['civicrm_activity'] = 1;
      $query->_tables['activity_type'] = 1;
      $query->_whereTables['civicrm_activity'] = 1;
      $query->_whereTables['activity_type'] = 1;
    }

    if (!empty($query->_returnProperties['activity_type'])) {
      $query->_select['activity_type'] = 'activity_type.label as activity_type';
      $query->_element['activity_type'] = 1;
      $query->_tables['civicrm_activity'] = 1;
      $query->_tables['activity_type'] = 1;
      $query->_whereTables['civicrm_activity'] = 1;
      $query->_whereTables['activity_type'] = 1;
    }

    if (!empty($query->_returnProperties['activity_subject'])) {
      $query->_select['activity_subject'] = 'civicrm_activity.subject as activity_subject';
      $query->_element['activity_subject'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['activity_date_time'])) {
      $query->_select['activity_date_time'] = 'civicrm_activity.activity_date_time as activity_date_time';
      $query->_element['activity_date_time'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['activity_status_id'])) {
      $query->_select['activity_status_id'] = 'civicrm_activity.status_id as activity_status_id';
      $query->_element['activity_status_id'] = 1;
      $query->_tables['civicrm_activity'] = 1;
      $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['activity_status'])) {
      $query->_select['activity_status'] = 'activity_status.label as activity_status,
      civicrm_activity.status_id as status_id';
      $query->_element['activity_status'] = 1;
      $query->_tables['civicrm_activity'] = 1;
      $query->_tables['activity_status'] = 1;
      $query->_whereTables['civicrm_activity'] = 1;
      $query->_whereTables['activity_status'] = 1;
    }

    if (!empty($query->_returnProperties['activity_duration'])) {
      $query->_select['activity_duration'] = 'civicrm_activity.duration as activity_duration';
      $query->_element['activity_duration'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['activity_location'])) {
      $query->_select['activity_location'] = 'civicrm_activity.location as activity_location';
      $query->_element['activity_location'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['activity_details'])) {
      $query->_select['activity_details'] = 'civicrm_activity.details as activity_details';
      $query->_element['activity_details'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['source_record_id'])) {
      $query->_select['source_record_id'] = 'civicrm_activity.source_record_id as source_record_id';
      $query->_element['source_record_id'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['activity_is_test'])) {
      $query->_select['activity_is_test'] = 'civicrm_activity.is_test as activity_is_test';
      $query->_element['activity_is_test'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['activity_campaign_id'])) {
      $query->_select['activity_campaign_id'] = 'civicrm_activity.campaign_id as activity_campaign_id';
      $query->_element['activity_campaign_id'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['activity_engagement_level'])) {
      $query->_select['activity_engagement_level'] = 'civicrm_activity.engagement_level as activity_engagement_level';
      $query->_element['activity_engagement_level'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (!empty($query->_returnProperties['source_contact'])) {
      $query->_select['source_contact'] = 'source_contact.sort_name as source_contact';
      $query->_element['source_contact'] = 1;
      $query->_tables['source_contact'] = $query->_whereTables['source_contact'] = 1;
    }

    if (!empty($query->_returnProperties['activity_result'])) {
      $query->_select['activity_result'] = 'civicrm_activity.result as activity_result';
      $query->_element['result'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }

    if (CRM_Utils_Array::value('parent_id', $query->_returnProperties)) {
      $query->_tables['parent_id'] = 1;
      $query->_whereTables['parent_id'] = 1;
      $query->_element['parent_id'] = 1;
    }

    if (!empty($query->_returnProperties['activity_priority'])) {
      $query->_select['activity_priority'] = 'activity_priority.label as activity_priority,
      civicrm_activity.priority_id as priority_id';
      $query->_element['activity_priority'] = 1;
      $query->_tables['activity_priority'] = 1;
      $query->_whereTables['activity_priority'] = 1;
      $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    }
  }

  /**
   * Given a list of conditions in query generate the required where clause.
   *
   * @param $query
   */
  public static function where(&$query) {
    foreach (array_keys($query->_params) as $id) {
      if (substr($query->_params[$id][0], 0, 9) == 'activity_') {
        if ($query->_mode == CRM_Contact_BAO_QUERY::MODE_CONTACTS) {
          $query->_useDistinct = TRUE;
        }
        $query->_params[$id][3];
        self::whereClauseSingle($query->_params[$id], $query);
      }
    }
  }

  /**
   * Where clause for a single field.
   *
   * @param array $values
   * @param CRM_Contact_BAO_Query $query
   */
  public static function whereClauseSingle(&$values, &$query) {
    list($name, $op, $value, $grouping) = $values;

    $fields = CRM_Activity_BAO_Activity::exportableFields();
    $query->_tables['civicrm_activity'] = $query->_whereTables['civicrm_activity'] = 1;
    if ($query->_mode & CRM_Contact_BAO_Query::MODE_ACTIVITY) {
      $query->_skipDeleteClause = TRUE;
    }

    switch ($name) {
      case 'activity_type_id':
      case 'activity_status_id':
      case 'activity_engagement_level':
      case 'activity_id':
      case 'activity_campaign_id':
      case 'activity_priority_id':
        // We no longer expect "subject" as a specific criteria (as of CRM-19447),
        // but we still use activity_subject in Activity.Get API
      case 'activity_subject':

        $qillName = $name;
        if (in_array($name, array('activity_engagement_level', 'activity_id'))) {
          $name = $qillName = str_replace('activity_', '', $name);
        }
        if (in_array($name, array('activity_status_id', 'activity_subject', 'activity_priority_id'))) {
          $name = str_replace('activity_', '', $name);
          $qillName = str_replace('_id', '', $qillName);
        }
        if ($name == 'activity_campaign_id') {
          $name  = 'campaign_id';
        }

        $dataType = !empty($fields[$qillName]['type']) ? CRM_Utils_Type::typeToString($fields[$qillName]['type']) : 'String';

        $query->_where[$grouping][] = CRM_Contact_BAO_Query::buildClause("civicrm_activity.$name", $op, $value, $dataType);
        list($op, $value) = CRM_Contact_BAO_Query::buildQillForFieldValue('CRM_Activity_DAO_Activity', $name, $value, $op);
        $query->_qill[$grouping][] = ts('%1 %2 %3', array(1 => $fields[$qillName]['title'], 2 => $op, 3 => $value));
        break;

      case 'activity_text':
        self::whereClauseSingleActivityText($values, $query);
        break;

      case 'activity_type':
      case 'activity_status':
      case 'activity_priority':
        $query->_where[$grouping][] = CRM_Contact_BAO_Query::buildClause("$name.label", $op, $value, 'String');
        list($op, $value) = CRM_Contact_BAO_Query::buildQillForFieldValue('CRM_Activity_DAO_Activity', $name, $value, $op);
        $query->_qill[$grouping][] = ts('%1 %2 %3', array(1 => $fields[$name]['title'], 2 => $op, 3 => $value));
        $query->_tables[$name] = $query->_whereTables[$name] = 1;
        break;

      case 'activity_survey_id':
        if (!$value) {
          break;
        }
        $value = CRM_Utils_Type::escape($value, 'Integer');
        $query->_where[$grouping][] = " civicrm_activity.source_record_id = $value";
        $query->_qill[$grouping][] = ts('Survey') . ' - ' . CRM_Core_DAO::getFieldValue('CRM_Campaign_DAO_Survey', $value, 'title');
        break;

      case 'activity_role':
        CRM_Contact_BAO_Query::$_activityRole = $values[2];
        $activityContacts = CRM_Activity_BAO_ActivityContact::buildOptions('record_type_id', 'validate');
        $sourceID = CRM_Utils_Array::key('Activity Source', $activityContacts);
        $assigneeID = CRM_Utils_Array::key('Activity Assignees', $activityContacts);
        $targetID = CRM_Utils_Array::key('Activity Targets', $activityContacts);

        if ($values[2]) {
          $query->_tables['civicrm_activity_contact'] = $query->_whereTables['civicrm_activity_contact'] = 1;
          if ($values[2] == 1) {
            $query->_where[$grouping][] = " civicrm_activity_contact.record_type_id = $sourceID";
            $query->_qill[$grouping][] = ts('Activity created by');
          }
          elseif ($values[2] == 2) {
            $query->_where[$grouping][] = " civicrm_activity_contact.record_type_id = $assigneeID";
            $query->_qill[$grouping][] = ts('Activity assigned to');
          }
          elseif ($values[2] == 3) {
            $query->_where[$grouping][] = " civicrm_activity_contact.record_type_id = $targetID";
            $query->_qill[$grouping][] = ts('Activity targeted to');
          }
        }
        break;

      case 'activity_test':
        // We don't want to include all tests for sql OR CRM-7827
        if (!$value || $query->getOperator() != 'OR') {
          $query->_where[$grouping][] = CRM_Contact_BAO_Query::buildClause("civicrm_activity.is_test", $op, $value, "Boolean");
          if ($value) {
            $query->_qill[$grouping][] = ts('Activity is a Test');
          }
        }
        break;

      case 'activity_date':
      case 'activity_date_low':
      case 'activity_date_high':
        $query->dateQueryBuilder($values,
          'civicrm_activity', 'activity_date', 'activity_date_time', ts('Activity Date')
        );
        break;

      case 'activity_taglist':
        $taglist = $value;
        $value = array();
        foreach ($taglist as $val) {
          if ($val) {
            $val = explode(',', $val);
            foreach ($val as $tId) {
              if (is_numeric($tId)) {
                $value[$tId] = 1;
              }
            }
          }
        }

      case 'activity_tags':
        $value = array_keys($value);
        $activityTags = CRM_Core_PseudoConstant::get('CRM_Core_DAO_EntityTag', 'tag_id', array('onlyActive' => FALSE));

        $names = array();
        if (is_array($value)) {
          foreach ($value as $k => $v) {
            $names[] = $activityTags[$v];
          }
        }
        $query->_where[$grouping][] = "civicrm_activity_tag.tag_id IN (" . implode(",", $value) . ")";
        $query->_qill[$grouping][] = ts('Activity Tag %1', array(1 => $op)) . ' ' . implode(' ' . ts('OR') . ' ', $names);
        $query->_tables['civicrm_activity_tag'] = $query->_whereTables['civicrm_activity_tag'] = 1;
        break;

      case 'activity_result':
        if (is_array($value)) {
          $safe = NULL;
          while (list(, $k) = each($value)) {
            $safe[] = "'" . CRM_Utils_Type::escape($k, 'String') . "'";
          }
          $query->_where[$grouping][] = "civicrm_activity.result IN (" . implode(',', $safe) . ")";
          $query->_qill[$grouping][] = ts("Activity Result - %1", array(1 => implode(' or ', $safe)));
        }
        break;

      case 'parent_id':
        if ($value == 1) {
          $query->_where[$grouping][] = "parent_id.parent_id IS NOT NULL";
          $query->_qill[$grouping][] = ts('Activities which have Followup Activities');
        }
        elseif ($value == 2) {
          $query->_where[$grouping][] = "parent_id.parent_id IS NULL";
          $query->_qill[$grouping][] = ts('Activities without Followup Activities');
        }
        break;

      case 'followup_parent_id':
        if ($value == 1) {
          $query->_where[$grouping][] = "civicrm_activity.parent_id IS NOT NULL";
          $query->_qill[$grouping][] = ts('Activities which are Followup Activities');
        }
        elseif ($value == 2) {
          $query->_where[$grouping][] = "civicrm_activity.parent_id IS NULL";
          $query->_qill[$grouping][] = ts('Activities which are not Followup Activities');
        }
        break;
    }
  }

  /**
   * @param string $name
   * @param $mode
   * @param $side
   *
   * @return null|string
   */
  public static function from($name, $mode, $side) {
    $from = NULL;
    switch ($name) {
      case 'civicrm_activity':
        //CRM-7480 we are going to civicrm_activity table either
        //from civicrm_activity_target or civicrm_activity_assignment.
        //as component specific activities does not have entry in
        //activity target table so lets consider civicrm_activity_assignment.
        $from .= " $side JOIN civicrm_activity_contact
                      ON ( civicrm_activity_contact.contact_id = contact_a.id ) ";
        $from .= " $side JOIN civicrm_activity
                      ON ( civicrm_activity.id = civicrm_activity_contact.activity_id
                      AND civicrm_activity.is_deleted = 0 AND civicrm_activity.is_current_revision = 1 )";
        // Do not show deleted contact's activity
        $from .= " INNER JOIN civicrm_contact
                      ON ( civicrm_activity_contact.contact_id = civicrm_contact.id and civicrm_contact.is_deleted != 1 )";
        break;

      case 'activity_status':
        $from .= " $side JOIN civicrm_option_group option_group_activity_status ON (option_group_activity_status.name = 'activity_status')";
        $from .= " $side JOIN civicrm_option_value activity_status ON (civicrm_activity.status_id = activity_status.value
                               AND option_group_activity_status.id = activity_status.option_group_id ) ";
        break;

      case 'activity_type':
        $from .= " $side JOIN civicrm_option_group option_group_activity_type ON (option_group_activity_type.name = 'activity_type')";
        $from .= " $side JOIN civicrm_option_value activity_type ON (civicrm_activity.activity_type_id = activity_type.value
                               AND option_group_activity_type.id = activity_type.option_group_id ) ";
        break;

      case 'activity_priority':
        $from .= " $side JOIN civicrm_option_group option_group_activity_priority ON (option_group_activity_priority.name = 'priority')";
        $from .= " $side JOIN civicrm_option_value activity_priority ON (civicrm_activity.priority_id = activity_priority.value
                              AND option_group_activity_priority.id = activity_priority.option_group_id ) ";
        break;

      case 'civicrm_activity_tag':
        $from .= " $side JOIN civicrm_entity_tag as civicrm_activity_tag ON ( civicrm_activity_tag.entity_table = 'civicrm_activity' AND civicrm_activity_tag.entity_id = civicrm_activity.id ) ";
        break;

      case 'source_contact':
        $activityContacts = CRM_Activity_BAO_ActivityContact::buildOptions('record_type_id', 'validate');
        $sourceID = CRM_Utils_Array::key('Activity Source', $activityContacts);
        $from = "
        LEFT JOIN civicrm_activity_contact ac
                      ON ( ac.activity_id = civicrm_activity_contact.activity_id AND ac.record_type_id = {$sourceID})
        INNER JOIN civicrm_contact source_contact ON (ac.contact_id = source_contact.id)";
        break;

      case 'parent_id':
        $from = "$side JOIN civicrm_activity AS parent_id ON civicrm_activity.id = parent_id.parent_id";
        break;
    }

    return $from;
  }

  /**
   * Add all the elements shared between case activity search and advanced search.
   *
   * @param CRM_Core_Form $form
   */
  public static function buildSearchForm(&$form) {
    $form->addSelect('activity_type_id',
      array('entity' => 'activity', 'label' => ts('Activity Type(s)'), 'multiple' => 'multiple', 'option_url' => NULL, 'placeholder' => ts('- any -'))
    );

    CRM_Core_Form_Date::buildDateRange($form, 'activity_date', 1, '_low', '_high', ts('From'), FALSE, FALSE);
    $form->addElement('hidden', 'activity_date_range_error');
    $form->addFormRule(array('CRM_Activity_BAO_Query', 'formRule'), $form);

    $followUpActivity = array(
      1 => ts('Yes'),
      2 => ts('No'),
    );
    $form->addRadio('parent_id', NULL, $followUpActivity, array('allowClear' => TRUE));
    $form->addRadio('followup_parent_id', NULL, $followUpActivity, array('allowClear' => TRUE));
    $activityRoles = array(
      3 => ts('With'),
      2 => ts('Assigned to'),
      1 => ts('Added by'),
    );
    $form->addRadio('activity_role', NULL, $activityRoles, array('allowClear' => TRUE));
    $form->setDefaults(array('activity_role' => 3));
    $activityStatus = CRM_Core_PseudoConstant::get('CRM_Activity_DAO_Activity', 'status_id', array('flip' => 1, 'labelColumn' => 'name'));
    $form->addSelect('status_id',
      array('entity' => 'activity', 'multiple' => 'multiple', 'option_url' => NULL, 'placeholder' => ts('- any -'))
    );
    $ssID = $form->get('ssID');
    $status = array($activityStatus['Completed'], $activityStatus['Scheduled']);
    //If status is saved in smart group.
    if (!empty($ssID) && !empty($form->_formValues['activity_status_id'])) {
      $status = $form->_formValues['activity_status_id'];
    }
    $form->setDefaults(array('status_id' => $status));

    $form->addElement('text', 'activity_text', ts('Activity Text'), CRM_Core_DAO::getAttribute('CRM_Contact_DAO_Contact', 'sort_name'));

    $form->addRadio('activity_option', '', CRM_Core_SelectValues::activityTextOptions());
    $form->setDefaults(array('activity_option' => 'both'));

    $priority = CRM_Core_PseudoConstant::get('CRM_Activity_DAO_Activity', 'priority_id');
    $form->addSelect('priority_id',
    array('entity' => 'activity', 'label' => ts('Priority'), 'multiple' => 'multiple', 'option_url' => NULL, 'placeholder' => ts('- any -'))
    );

    $form->addYesNo('activity_test', ts('Activity is a Test?'));
    $activity_tags = CRM_Core_BAO_Tag::getTags('civicrm_activity');
    if ($activity_tags) {
      foreach ($activity_tags as $tagID => $tagName) {
        $form->_tagElement = &$form->addElement('checkbox', "activity_tags[$tagID]",
          NULL, $tagName
        );
      }
    }

    $parentNames = CRM_Core_BAO_Tag::getTagSet('civicrm_activity');
    CRM_Core_Form_Tag::buildQuickForm($form, $parentNames, 'civicrm_activity', NULL, TRUE, TRUE);

    $surveys = CRM_Campaign_BAO_Survey::getSurveys(TRUE, FALSE, FALSE, TRUE);
    if ($surveys) {
      $form->add('select', 'activity_survey_id', ts('Survey / Petition'),
                 array('' => ts('- none -')) + $surveys, FALSE,
                 array('class' => 'crm-select2')
                 );
    }

    CRM_Core_BAO_Query::addCustomFormFields($form, array('Activity'));

    CRM_Campaign_BAO_Campaign::addCampaignInComponentSearch($form, 'activity_campaign_id');

    // Add engagement level CRM-7775.
    $buildEngagementLevel = FALSE;
    $buildSurveyResult = FALSE;
    if (CRM_Campaign_BAO_Campaign::isCampaignEnable() &&
      CRM_Campaign_BAO_Campaign::accessCampaign()
    ) {
      $buildEngagementLevel = TRUE;
      $form->addSelect('activity_engagement_level', array('entity' => 'activity', 'context' => 'search'));

      // Add survey result field.
      $optionGroups = CRM_Campaign_BAO_Survey::getResultSets('name');
      $resultOptions = array();
      foreach ($optionGroups as $gid => $name) {
        if ($name) {
          $value = CRM_Core_OptionGroup::values($name);
          if (!empty($value)) {
            while (list($k, $v) = each($value)) {
              $resultOptions[$v] = $v;
            }
          }
        }
      }
      // If no survey result options have been created, don't build
      // the field to avoid clutter.
      if (count($resultOptions) > 0) {
        $buildSurveyResult = TRUE;
        asort($resultOptions);
        $form->add('select', 'activity_result', ts("Survey Result"),
          $resultOptions, FALSE,
          array('id' => 'activity_result', 'multiple' => 'multiple', 'class' => 'crm-select2')
        );
      }
    }

    $form->assign('buildEngagementLevel', $buildEngagementLevel);
    $form->assign('buildSurveyResult', $buildSurveyResult);
    $form->setDefaults(array('activity_test' => 0));
  }

  /**
   * @param $mode
   * @param bool $includeCustomFields
   *
   * @return array|null
   */
  public static function defaultReturnProperties($mode, $includeCustomFields = TRUE) {
    $properties = NULL;
    if ($mode & CRM_Contact_BAO_Query::MODE_ACTIVITY) {
      $properties = array(
        'activity_id' => 1,
        'contact_type' => 1,
        'contact_sub_type' => 1,
        'sort_name' => 1,
        'display_name' => 1,
        'activity_type' => 1,
        'activity_type_id' => 1,
        'activity_subject' => 1,
        'activity_date_time' => 1,
        'activity_duration' => 1,
        'activity_location' => 1,
        'activity_details' => 1,
        'activity_status' => 1,
        'activity_priority' => 1,
        'source_contact' => 1,
        'source_record_id' => 1,
        'activity_is_test' => 1,
        'activity_campaign_id' => 1,
        'result' => 1,
        'activity_engagement_level' => 1,
        'parent_id' => 1,
      );

      if ($includeCustomFields) {
        // also get all the custom activity properties
        $fields = CRM_Core_BAO_CustomField::getFieldsForImport('Activity');
        if (!empty($fields)) {
          foreach ($fields as $name => $dontCare) {
            $properties[$name] = 1;
          }
        }
      }
    }

    return $properties;
  }

  /**
   * Get the list of fields required to populate the selector.
   *
   * The default return properties array returns far too many fields for 'everyday use. Every field you add to this array
   * kills a small kitten so add carefully.
   */
  public static function selectorReturnProperties() {
    $properties = array(
      'activity_id' => 1,
      'contact_type' => 1,
      'contact_sub_type' => 1,
      'sort_name' => 1,
      'display_name' => 1,
      'activity_type_id' => 1,
      'activity_subject' => 1,
      'activity_date_time' => 1,
      'activity_status_id' => 1,
      'source_contact' => 1,
      'source_record_id' => 1,
      'activity_is_test' => 1,
      'activity_campaign_id' => 1,
      'activity_engagement_level' => 1,
    );

    return $properties;
  }

  /**
   * Custom form rules.
   *
   * @param array $fields
   * @param array $files
   * @param CRM_Core_Form $form
   *
   * @return bool|array
   */
  public static function formRule($fields, $files, $form) {
    $errors = array();

    if (empty($fields['activity_date_low']) || empty($fields['activity_date_high'])) {
      return TRUE;
    }

    CRM_Utils_Rule::validDateRange($fields, 'activity_date', $errors, ts('Activity Date'));

    return empty($errors) ? TRUE : $errors;
  }

  /**
   * Where/qill clause for notes
   *
   * @param array $values
   */
  public static function whereClauseSingleActivityText(&$values, &$query) {
    list($name, $op, $value, $grouping, $wildcard) = $values;
    $activityOptionValues = $query->getWhereValues('activity_option', $grouping);
    $activityOption = CRM_Utils_Array::value(2, $activityOptionValues, 6);

    $query->_useDistinct = TRUE;

    $label = ts('Activity Text (%1)', array(1 => CRM_Utils_Array::value($activityOption, CRM_Core_SelectValues::activityTextOptions())));
    $clauses = array();
    if ($activityOption % 2 == 0) {
      $clauses[] = $query->buildClause('civicrm_activity.details', $op, $value, 'String');
    }
    if ($activityOption % 3 == 0) {
      $clauses[] = $query->buildClause('civicrm_activity.subject', $op, $value, 'String');
    }

    $query->_where[$grouping][] = "( " . implode(' OR ', $clauses) . " )";
    list($qillOp, $qillVal) = $query->buildQillForFieldValue(NULL, $name, $value, $op);
    $query->_qill[$grouping][] = ts("%1 %2 '%3'", array(1 => $label, 2 => $qillOp, 3 => $qillVal));
  }

}
