<?php
/*
 +--------------------------------------------------------------------+
 | CiviCRM version 4.3                                                |
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC (c) 2004-2013                                |
 +--------------------------------------------------------------------+
 | 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) 2004-2013
 * $Id$
 *
 */

/**
 * This class provides the functionality to email a group of contacts
 */
class CRM_Activity_Form_Task_PickOption extends CRM_Activity_Form_Task {

  /**
   * the title of the group
   *
   * @var string
   */
  protected $_title;

  /**
   * maximum Activities that should be allowed to update
   *
   */
  protected $_maxActivities = 100;

  /**
   * variable to store redirect path
   *
   */
  protected $_userContext;

  /**
   * variable to store contact Ids
   *
   */
  public $_contacts;

  /**
   * build all the data structures needed to build the form
   *
   * @return void
   * @access public
   */
  function preProcess() {
    /*
     * initialize the task and row fields
     */
      
    parent::preProcess();
    $session = CRM_Core_Session::singleton();
    $this->_userContext = $session->readUserContext();

    CRM_Utils_System::setTitle(ts('Send Email to Contacts'));

    $validate = FALSE;
    //validations
    if (count($this->_activityHolderIds) > $this->_maxActivities) {
      CRM_Core_Session::setStatus(ts("The maximum number of Activities you can select to send an email is %1. You have selected %2. Please select fewer Activities from your search results and try again.", array(1 => $this->_maxActivities, 2 => count($this->_activityHolderIds))), ts("Maximum Exceeded"), "error");
      $validate = TRUE;
    }
    // then redirect
    if ($validate) {
      CRM_Utils_System::redirect($this->_userContext);
    }
  }

  /**
   * Build the form
   *
   * @access public
   *
   * @return void
   */
  function buildQuickForm() {
    $this->addElement('checkbox', 'with_contact', ts('With Contact'));
    $this->addElement('checkbox', 'assigned_to', ts('Assigned to Contact'));
    $this->addElement('checkbox', 'created_by', ts('Created by'));
    $this->setDefaults(array('with_contact' => 1));
    $this->addDefaultButtons(ts('Continue >>'));
  }

  /**
   * Add local and global form rules
   *
   * @access protected
   *
   * @return void
   */
  function addRules() {
    $this->addFormRule(array('CRM_Activity_Form_Task_PickOption', 'formRule'));
  }

  /**
   * global validation rules for the form
   *
   * @param array $fields posted values of the form
   *
   * @return array list of errors to be posted back to the form
   * @static
   * @access public
   */
  static function formRule($fields) {
    if ( !isset($fields['with_contact']) &&
      !isset($fields['assigned_to']) &&
      !isset($fields['created_by'])
    ) {
      return array('with_contact' => ts('You must select at least one email recipient type.'));
    }
    return TRUE;
  }

  /**
   * process the form after the input has been submitted and validated
   *
   * @access public
   *
   * @return None
   */
  public function postProcess() {
    // Clear any formRule errors from Email form in case they came back here via Cancel button
    $this->controller->resetPage('Email');
    $params = $this->exportValues();
    $this->_contacts = array();
    
    $activityContacts = CRM_Core_PseudoConstant::activityContacts('name');
    $assigneeID = CRM_Utils_Array::key('Activity Assignees', $activityContacts);
    $targetID = CRM_Utils_Array::key('Activity Targets', $activityContacts); 
    //get assignee contacts
    if (!empty($params['assigned_to'])) {
      foreach ($this->_activityHolderIds as $key => $id) {
        $ids = array_keys(CRM_Activity_BAO_ActivityContact::getNames($id, $assigneeID));
        $this->_contacts = array_merge($this->_contacts, $ids);
      }
    }
    //get target contacts
    if (!empty($params['with_contact'])) {
      foreach ($this->_activityHolderIds as $key => $id) {
        $ids = array_keys(CRM_Activity_BAO_ActivityContact::getNames($id, $targetID));
        $this->_contacts = array_merge($this->_contacts, $ids);
      }
    }
    //get 'Added by' contacts
    if (!empty($params['created_by'])) {
      parent::setContactIDs();
      if (!empty($this->_contactIds)) {
        $this->_contacts = array_merge($this->_contacts, $this->_contactIds);
      }
    }
    $this->_contacts = array_unique($this->_contacts);

    //bounce to pick option if no contacts to send to
    if ( empty($this->_contacts) ) {
      $urlParams = "_qf_PickOption_display=true&qfKey={$params['qfKey']}";
      $urlRedirect = CRM_Utils_System::url('civicrm/activity/search', $urlParams);
      CRM_Core_Error::statusBounce(
        ts('It appears you have no contacts with emails from the selected recipients.'),
        $urlRedirect
      );
    }

    $this->set('contacts', $this->_contacts);
  }
}