<?php
/*
 +--------------------------------------------------------------------+
 | CiviCRM version 4.7                                                |
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC (c) 2004-2015                                |
 +--------------------------------------------------------------------+
 | 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) 2004-2015
 */
abstract class CRM_Core_Page_Basic extends CRM_Core_Page {

  protected $_action;

  /**
   * Define all the abstract functions here.
   */

  /**
   * Name of the BAO to perform various DB manipulations.
   *
   * @return string
   */
  abstract protected function getBAOName();

  /**
   * An array of action links.
   *
   * @return array
   *   (reference)
   */
  abstract protected function &links();

  /**
   * Name of the edit form class.
   *
   * @return string
   */
  abstract protected function editForm();

  /**
   * Name of the form.
   *
   * @return string
   */
  abstract protected function editName();

  /**
   * UserContext to pop back to.
   *
   * @param int $mode
   *   Mode that we are in.
   *
   * @return string
   */
  abstract protected function userContext($mode = NULL);

  /**
   * Get userContext params.
   *
   * @param int $mode
   *   Mode that we are in.
   *
   * @return string
   */
  public function userContextParams($mode = NULL) {
    return 'reset=1&action=browse';
  }

  /**
   * Allow objects to be added based on permission.
   *
   * @param int $id
   *   The id of the object.
   * @param int $name
   *   The name or title of the object.
   *
   * @return string
   *   permission value if permission is granted, else null
   */
  public function checkPermission($id, $name) {
    return CRM_Core_Permission::EDIT;
  }

  /**
   * Allows the derived class to add some more state variables to
   * the controller. By default does nothing, and hence is abstract
   *
   * @param CRM_Core_Controller $controller
   *   The controller object.
   */
  public function addValues($controller) {
  }

  /**
   * Class constructor.
   *
   * @param string $title
   *   Title of the page.
   * @param int $mode
   *   Mode of the page.
   *
   * @return \CRM_Core_Page_Basic
   */
  public function __construct($title = NULL, $mode = NULL) {
    parent::__construct($title, $mode);
  }

  /**
   * Run the basic page (run essentially starts execution for that page).
   */
  public function run() {
    // CRM-9034
    // do not see args or pageArgs being used, so we should
    // consider eliminating them in a future version
    $n = func_num_args();
    $args = ($n > 0) ? func_get_arg(0) : NULL;
    $pageArgs = ($n > 1) ? func_get_arg(1) : NULL;
    $sort = ($n > 2) ? func_get_arg(2) : NULL;
    // what action do we want to perform ? (store it for smarty too.. :)

    $this->_action = CRM_Utils_Request::retrieve('action', 'String', $this, FALSE, 'browse');
    $this->assign('action', $this->_action);

    // get 'id' if present
    $id = CRM_Utils_Request::retrieve('id', 'Positive', $this, FALSE, 0);

    require_once str_replace('_', DIRECTORY_SEPARATOR, $this->getBAOName()) . ".php";

    if ($id) {
      if (!$this->checkPermission($id, NULL)) {
        CRM_Core_Error::fatal(ts('You do not have permission to make changes to the record'));
      }
    }

    if ($this->_action & (CRM_Core_Action::VIEW |
        CRM_Core_Action::ADD |
        CRM_Core_Action::UPDATE |
        CRM_Core_Action::COPY |
        CRM_Core_Action::ENABLE |
        CRM_Core_Action::DISABLE |
        CRM_Core_Action::DELETE
      )
    ) {
      // use edit form for view, add or update or delete
      $this->edit($this->_action, $id);
    }
    else {
      // if no action or browse
      $this->browse(NULL, $sort);
    }

    return parent::run();
  }

  /**
   * @return string
   */
  public function superRun() {
    return parent::run();
  }

  /**
   * Browse all entities.
   */
  public function browse() {
    $n = func_num_args();
    $action = ($n > 0) ? func_get_arg(0) : NULL;
    $sort = ($n > 0) ? func_get_arg(1) : NULL;
    $links = &$this->links();
    if ($action == NULL) {
      if (!empty($links)) {
        $action = array_sum(array_keys($links));
      }
    }
    if ($action & CRM_Core_Action::DISABLE) {
      $action -= CRM_Core_Action::DISABLE;
    }
    if ($action & CRM_Core_Action::ENABLE) {
      $action -= CRM_Core_Action::ENABLE;
    }
    $baoString = $this->getBAOName();
    $object = new $baoString();

    $values = array();

    // lets make sure we get the stuff sorted by name if it exists
    $fields = &$object->fields();
    $key = '';
    if (!empty($fields['title'])) {
      $key = 'title';
    }
    elseif (!empty($fields['label'])) {
      $key = 'label';
    }
    elseif (!empty($fields['name'])) {
      $key = 'name';
    }

    if (trim($sort)) {
      $object->orderBy($sort);
    }
    elseif ($key) {
      $object->orderBy($key . ' asc');
    }

    //@todo FIXME - using the CRM_Core_DAO::VALUE_SEPARATOR creates invalid html - if you can find the form
    // this is loaded onto then replace with something like '__' & test
    $separator = CRM_Core_DAO::VALUE_SEPARATOR;
    $contactTypes = CRM_Contact_BAO_ContactType::getSelectElements(FALSE, TRUE, $separator);
    // find all objects
    $object->find();
    while ($object->fetch()) {
      if (!isset($object->mapping_type_id) ||
        // "1 for Search Builder"
        $object->mapping_type_id != 1
      ) {
        $permission = CRM_Core_Permission::EDIT;
        if ($key) {
          $permission = $this->checkPermission($object->id, $object->$key);
        }
        if ($permission) {
          $values[$object->id] = array();
          CRM_Core_DAO::storeValues($object, $values[$object->id]);

          if (is_a($object, 'CRM_Contact_DAO_RelationshipType')) {
            $values[$object->id]['contact_type_a_display'] = $contactTypes[$values[$object->id]['contact_type_a']];
            $values[$object->id]['contact_type_b_display'] = $contactTypes[$values[$object->id]['contact_type_b']];
          }

          // populate action links
          $this->action($object, $action, $values[$object->id], $links, $permission);

          if (isset($object->mapping_type_id)) {
            $mappintTypes = CRM_Core_PseudoConstant::get('CRM_Core_DAO_Mapping', 'mapping_type_id');
            $values[$object->id]['mapping_type'] = $mappintTypes[$object->mapping_type_id];
          }
        }
      }
    }
    $this->assign('rows', $values);
  }

  /**
   * Given an object, get the actions that can be associated with this
   * object. Check the is_active and is_required flags to display valid
   * actions
   *
   * @param CRM_Core_DAO $object
   *   The object being considered.
   * @param int $action
   *   The base set of actions.
   * @param array $values
   *   The array of values that we send to the template.
   * @param array $links
   *   The array of links.
   * @param string $permission
   *   The permission assigned to this object.
   *
   * @param bool $forceAction
   */
  public function action(&$object, $action, &$values, &$links, $permission, $forceAction = FALSE) {
    $values['class'] = '';
    $newAction = $action;
    $hasDelete = $hasDisable = TRUE;

    if (!empty($values['name']) && in_array($values['name'], array(
        'encounter_medium',
        'case_type',
        'case_status',
      ))
    ) {
      static $caseCount = NULL;
      if (!isset($caseCount)) {
        $caseCount = CRM_Case_BAO_Case::caseCount(NULL, FALSE);
      }
      if ($caseCount > 0) {
        $hasDelete = $hasDisable = FALSE;
      }
    }

    if (!$forceAction) {
      if (array_key_exists('is_reserved', $object) && $object->is_reserved) {
        $values['class'] = 'reserved';
        // check if object is relationship type
        $object_type = get_class($object);

        $exceptions = array(
          'CRM_Contact_BAO_RelationshipType',
          'CRM_Core_BAO_LocationType',
          'CRM_Badge_BAO_Layout',
        );

        if (in_array($object_type, $exceptions)) {
          $newAction = CRM_Core_Action::VIEW + CRM_Core_Action::UPDATE;
        }
        else {
          $newAction = 0;
          $values['action'] = '';
          return;
        }
      }
      else {
        if (array_key_exists('is_active', $object)) {
          if ($object->is_active) {
            if ($hasDisable) {
              $newAction += CRM_Core_Action::DISABLE;
            }
          }
          else {
            $newAction += CRM_Core_Action::ENABLE;
          }
        }
      }
    }

    //CRM-4418, handling edit and delete separately.
    $permissions = array($permission);
    if ($hasDelete && ($permission == CRM_Core_Permission::EDIT)) {
      //previously delete was subset of edit
      //so for consistency lets grant delete also.
      $permissions[] = CRM_Core_Permission::DELETE;
    }

    // make sure we only allow those actions that the user is permissioned for
    $newAction = $newAction & CRM_Core_Action::mask($permissions);

    $values['action'] = CRM_Core_Action::formLink($links, $newAction, array('id' => $object->id));
  }

  /**
   * Edit this entity.
   *
   * @param int $mode
   *   What mode for the form ?.
   * @param int $id
   *   Id of the entity (for update, view operations).
   *
   * @param bool $imageUpload
   * @param bool $pushUserContext
   */
  public function edit($mode, $id = NULL, $imageUpload = FALSE, $pushUserContext = TRUE) {
    $controller = new CRM_Core_Controller_Simple($this->editForm(),
      $this->editName(),
      $mode,
      $imageUpload
    );

    // set the userContext stack
    if ($pushUserContext) {
      $session = CRM_Core_Session::singleton();
      $session->pushUserContext(CRM_Utils_System::url($this->userContext($mode), $this->userContextParams($mode)));
    }
    if ($id !== NULL) {
      $controller->set('id', $id);
    }
    $controller->set('BAOName', $this->getBAOName());
    $this->addValues($controller);
    $controller->setEmbedded(TRUE);
    $controller->process();
    $controller->run();
  }

}