drupal-civicrm/sites/all/modules/civicrm/CRM/Case/StateMachine/Search.php

<?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_Case_StateMachine_Search extends CRM_Core_StateMachine {

  /**
   * The task that the wizard is currently processing.
   *
   * @var string
   */
  protected $_task;

  /**
   * Class constructor.
   *
   * @param object $controller
   * @param \const|int $action
   */
  public function __construct($controller, $action = CRM_Core_Action::NONE) {
    parent::__construct($controller, $action);

    $this->_pages = array();

    $this->_pages['CRM_Case_Form_Search'] = NULL;
    list($task, $result) = $this->taskName($controller, 'Search');
    $this->_task = $task;

    if (is_array($task)) {
      foreach ($task as $t) {
        $this->_pages[$t] = NULL;
      }
    }
    else {
      $this->_pages[$task] = NULL;
    }

    if ($result) {
      $this->_pages['CRM_Case_Form_Task_Result'] = NULL;
    }

    $this->addSequentialPages($this->_pages, $action);
  }

  /**
   * Determine the form name based on the action. This allows us
   * to avoid using  conditional state machine, much more efficient
   * and simpler
   *
   * @param CRM_Core_Controller $controller
   *   The controller object.
   *
   * @param string $formName
   *
   * @return string
   *   the name of the form that will handle the task
   */
  public function taskName($controller, $formName = 'Search') {
    // total hack, check POST vars and then session to determine stuff
    $value = CRM_Utils_Array::value('task', $_POST);
    if (!isset($value)) {
      $value = $this->_controller->get('task');
    }
    $this->_controller->set('task', $value);

    return CRM_Case_Task::getTask($value);
  }

  /**
   * Return the form name of the task.
   *
   * @return string
   */
  public function getTaskFormName() {
    return CRM_Utils_String::getClassName($this->_task);
  }

  /**
   * Since this is a state machine for search and we want to come back to the same state
   * we dont want to issue a reset of the state session when we are done processing a task
   */
  public function shouldReset() {
    return FALSE;
  }

}