preliminary tidy up

[civicrm-core.git] / CRM / Core / Payment / BaseIPN.php

<?php
/*
 +--------------------------------------------------------------------+
 | CiviCRM version 4.6                                                |
 +--------------------------------------------------------------------+
 | 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        |
 +--------------------------------------------------------------------+
 */

/**
 *
 * @package CRM
 * @copyright CiviCRM LLC (c) 2004-2014
 * $Id$
 *
 */
class CRM_Core_Payment_BaseIPN {

  static $_now = NULL;

  /**
   * Input parameters from payment processor. Store these so that
   * the code does not need to keep retrieving from the http request
   * @var array
   */
  protected $_inputParameters = array();

  protected $_isRecurring = FALSE;

  protected $_isFirstOrLastRecurringPayment = FALSE;

  /**
   * Constructor.
   */
  public function __construct() {
    self::$_now = date('YmdHis');
  }

  /**
   * Store input array on the class.
   *
   * @param array $parameters
   *
   * @throws CRM_Core_Exception
   */
  public function setInputParameters($parameters) {
    if (!is_array($parameters)) {
      throw new CRM_Core_Exception('Invalid input parameters');
    }
    $this->_inputParameters = $parameters;
  }

  /**
   * Validate incoming data. This function is intended to ensure that incoming data matches
   * It provides a form of pseudo-authentication - by checking the calling fn already knows
   * the correct contact id & contribution id (this can be problematic when that has changed in
   * the meantime for transactions that are delayed & contacts are merged in-between. e.g
   * Paypal allows you to resend Instant Payment Notifications if you, for example, moved site
   * and didn't update your IPN URL.
   *
   * @param array $input
   *   Interpreted values from the values returned through the IPN.
   * @param array $ids
   *   More interpreted values (ids) from the values returned through the IPN.
   * @param array $objects
   *   An empty array that will be populated with loaded object.
   * @param bool $required
   *   Boolean Return FALSE if the relevant objects don't exist.
   * @param int $paymentProcessorID
   *   Id of the payment processor ID in use.
   * @return bool
   */
  public function validateData(&$input, &$ids, &$objects, $required = TRUE, $paymentProcessorID = NULL) {

    // make sure contact exists and is valid
    $contact = new CRM_Contact_BAO_Contact();
    $contact->id = $ids['contact'];
    if (!$contact->find(TRUE)) {
      CRM_Core_Error::debug_log_message("Could not find contact record: {$ids['contact']} in IPN request: " . print_r($input, TRUE));
      echo "Failure: Could not find contact record: {$ids['contact']}<p>";
      return FALSE;
    }

    // make sure contribution exists and is valid
    $contribution = new CRM_Contribute_BAO_Contribution();
    $contribution->id = $ids['contribution'];
    if (!$contribution->find(TRUE)) {
      CRM_Core_Error::debug_log_message("Could not find contribution record: {$contribution->id} in IPN request: " . print_r($input, TRUE));
      echo "Failure: Could not find contribution record for {$contribution->id}<p>";
      return FALSE;
    }
    $contribution->receive_date = CRM_Utils_Date::isoToMysql($contribution->receive_date);

    $objects['contact'] = &$contact;
    $objects['contribution'] = &$contribution;
    if (!$this->loadObjects($input, $ids, $objects, $required, $paymentProcessorID)) {
      return FALSE;
    }
    //the process is that the loadObjects is kind of hacked by loading the objects for the original contribution and then somewhat inconsistently using them for the
    //current contribution. Here we ensure that the original contribution is available to the complete transaction function
    //we don't want to fix this in the payment processor classes because we would have to fix all of them - so better to fix somewhere central
    if (isset($objects['contributionRecur'])) {
      $objects['first_contribution'] = $objects['contribution'];
    }
    return TRUE;
  }

  /**
   * Load objects related to contribution.
   *
   * @input array information from Payment processor
   *
   * @param $input
   * @param array $ids
   * @param array $objects
   * @param bool $required
   * @param int $paymentProcessorID
   * @param array $error_handling
   *
   * @return bool
   */
  public function loadObjects(&$input, &$ids, &$objects, $required, $paymentProcessorID, $error_handling = NULL) {
    if (empty($error_handling)) {
      // default options are that we log an error & echo it out
      // note that we should refactor this error handling into error code @ some point
      // but for now setting up enough separation so we can do unit tests
      $error_handling = array(
        'log_error' => 1,
        'echo_error' => 1,
      );
    }
    $ids['paymentProcessor'] = $paymentProcessorID;
    if (is_a($objects['contribution'], 'CRM_Contribute_BAO_Contribution')) {
      $contribution = &$objects['contribution'];
    }
    else {
      //legacy support - functions are 'used' to be able to pass in a DAO
      $contribution = new CRM_Contribute_BAO_Contribution();
      $contribution->id = CRM_Utils_Array::value('contribution', $ids);
      $contribution->find(TRUE);
      $objects['contribution'] = &$contribution;
    }
    try {
      $success = $contribution->loadRelatedObjects($input, $ids, $required);
    }
    catch (Exception $e) {
      $success = FALSE;
      if (!empty($error_handling['log_error'])) {
        CRM_Core_Error::debug_log_message($e->getMessage());
      }
      if (!empty($error_handling['echo_error'])) {
        echo $e->getMessage();
      }
      if (!empty($error_handling['return_error'])) {
        return array(
          'is_error' => 1,
          'error_message' => ($e->getMessage()),
        );
      }
    }
    $objects = array_merge($objects, $contribution->_relatedObjects);
    return $success;
  }

  /**
   * Set contribution to failed.
   *
   * @param array $objects
   * @param object $transaction
   * @param array $input
   *
   * @return bool
   */
  public function failed(&$objects, &$transaction, $input = array()) {
    $contribution = &$objects['contribution'];
    $memberships = array();
    if (!empty($objects['membership'])) {
      $memberships = &$objects['membership'];
      if (is_numeric($memberships)) {
        $memberships = array($objects['membership']);
      }
    }

    $addLineItems = FALSE;
    if (empty($contribution->id)) {
      $addLineItems = TRUE;
    }
    $participant = &$objects['participant'];

    //CRM-15546
    $contributionStatuses = CRM_Core_PseudoConstant::get('CRM_Contribute_DAO_Contribution', 'contribution_status_id', array(
        'labelColumn' => 'name',
        'flip' => 1,
      ));
    $contribution->receive_date = CRM_Utils_Date::isoToMysql($contribution->receive_date);
    $contribution->receipt_date = CRM_Utils_Date::isoToMysql($contribution->receipt_date);
    $contribution->thankyou_date = CRM_Utils_Date::isoToMysql($contribution->thankyou_date);
    $contribution->contribution_status_id = $contributionStatuses['Failed'];
    $contribution->save();

    // Add line items for recurring payments.
    if (!empty($objects['contributionRecur']) && $objects['contributionRecur']->id && $addLineItems) {
      $this->addRecurLineItems($objects['contributionRecur']->id, $contribution);
    }

    //add new soft credit against current contribution id and
    //copy initial contribution custom fields for recurring contributions
    if (!empty($objects['contributionRecur']) && $objects['contributionRecur']->id) {
      $this->addrecurSoftCredit($objects['contributionRecur']->id, $contribution->id);
      $this->copyCustomValues($objects['contributionRecur']->id, $contribution->id);
    }

    if (empty($input['skipComponentSync'])) {
      if (!empty($memberships)) {
        // if transaction is failed then set "Cancelled" as membership status
        $membershipStatuses = CRM_Core_PseudoConstant::get('CRM_Member_DAO_Membership', 'status_id', array(
            'labelColumn' => 'name',
            'flip' => 1,
          ));
        foreach ($memberships as $membership) {
          if ($membership) {
            $membership->status_id = $membershipStatuses['Cancelled'];
            $membership->save();

            //update related Memberships.
            $params = array('status_id' => $membershipStatuses['Cancelled']);
            CRM_Member_BAO_Membership::updateRelatedMemberships($membership->id, $params);
          }
        }
      }

      if ($participant) {
        $participantStatuses = CRM_Core_PseudoConstant::get('CRM_Event_DAO_Participant', 'status_id', array(
            'labelColumn' => 'name',
            'flip' => 1,
          ));
        $participant->status_id = $participantStatuses['Cancelled'];
        $participant->save();
      }
    }

    $transaction->commit();
    CRM_Core_Error::debug_log_message("Setting contribution status to failed");
    //echo "Success: Setting contribution status to failed<p>";
    return TRUE;
  }

  /**
   * Handled pending contribution status.
   * @param array $objects
   * @param object $transaction
   * @return bool
   */
  public function pending(&$objects, &$transaction) {
    $transaction->commit();
    CRM_Core_Error::debug_log_message("returning since contribution status is pending");
    echo "Success: Returning since contribution status is pending<p>";
    return TRUE;
  }

  /**
   * @param $objects
   * @param $transaction
   * @param array $input
   *
   * @return bool
   */
  public function cancelled(&$objects, &$transaction, $input = array()) {
    $contribution = &$objects['contribution'];
    $memberships = &$objects['membership'];
    if (is_numeric($memberships)) {
      $memberships = array($objects['membership']);
    }

    $participant = &$objects['participant'];
    $addLineItems = FALSE;
    if (empty($contribution->id)) {
      $addLineItems = TRUE;
    }
    $contributionStatuses = CRM_Core_PseudoConstant::get('CRM_Contribute_DAO_Contribution', 'contribution_status_id', array(
        'labelColumn' => 'name',
        'flip' => 1,
      ));
    $contribution->contribution_status_id = $contributionStatuses['Cancelled'];
    $contribution->cancel_date = self::$_now;
    $contribution->cancel_reason = CRM_Utils_Array::value('reasonCode', $input);
    $contribution->receive_date = CRM_Utils_Date::isoToMysql($contribution->receive_date);
    $contribution->receipt_date = CRM_Utils_Date::isoToMysql($contribution->receipt_date);
    $contribution->thankyou_date = CRM_Utils_Date::isoToMysql($contribution->thankyou_date);
    $contribution->save();

    //add lineitems for recurring payments
    if (!empty($objects['contributionRecur']) && $objects['contributionRecur']->id && $addLineItems) {
      $this->addRecurLineItems($objects['contributionRecur']->id, $contribution);
    }

    //add new soft credit against current $contribution and
    //copy initial contribution custom fields for recurring contributions
    if (!empty($objects['contributionRecur']) && $objects['contributionRecur']->id) {
      $this->addrecurSoftCredit($objects['contributionRecur']->id, $contribution->id);
      $this->copyCustomValues($objects['contributionRecur']->id, $contribution->id);
    }

    if (empty($input['skipComponentSync'])) {
      if (!empty($memberships)) {
        $membershipStatuses = CRM_Core_PseudoConstant::get('CRM_Member_DAO_Membership', 'status_id', array(
            'labelColumn' => 'name',
            'flip' => 1,
          ));
        foreach ($memberships as $membership) {
          if ($membership) {
            $membership->status_id = $membershipStatuses['Cancelled'];
            $membership->save();

            //update related Memberships.
            $params = array('status_id' => $membershipStatuses['Cancelled']);
            CRM_Member_BAO_Membership::updateRelatedMemberships($membership->id, $params);
          }
        }
      }

      if ($participant) {
        $participantStatuses = CRM_Core_PseudoConstant::get('CRM_Event_DAO_Participant', 'status_id', array(
            'labelColumn' => 'name',
            'flip' => 1,
          ));
        $participant->status_id = $participantStatuses['Cancelled'];
        $participant->save();
      }
    }
    $transaction->commit();
    CRM_Core_Error::debug_log_message("Setting contribution status to cancelled");
    //echo "Success: Setting contribution status to cancelled<p>";
    return TRUE;
  }

  /**
   * @param $objects
   * @param $transaction
   *
   * @return bool
   */
  public function unhandled(&$objects, &$transaction) {
    $transaction->rollback();
    CRM_Core_Error::debug_log_message("returning since contribution status: is not handled");
    echo "Failure: contribution status is not handled<p>";
    return FALSE;
  }

  /**
   * @param $input
   * @param $ids
   * @param $objects
   * @param $transaction
   * @param bool $recur
   */
  public function completeTransaction(&$input, &$ids, &$objects, &$transaction, $recur = FALSE) {
    $contribution = &$objects['contribution'];

    $primaryContributionID = isset($contribution->id) ? $contribution->id : $objects['first_contribution']->id;

    $memberships = &$objects['membership'];
    if (is_numeric($memberships)) {
      $memberships = array($objects['membership']);
    }
    $participant = &$objects['participant'];
    $event = &$objects['event'];
    $changeToday = CRM_Utils_Array::value('trxn_date', $input, self::$_now);
    $recurContrib = &$objects['contributionRecur'];

    $values = array();
    $source = NULL;
    if ($input['component'] == 'contribute') {
      if ($contribution->contribution_page_id) {
        CRM_Contribute_BAO_ContributionPage::setValues($contribution->contribution_page_id, $values);
        $source = ts('Online Contribution') . ': ' . $values['title'];
      }
      elseif ($recurContrib && $recurContrib->id) {
        $contribution->contribution_page_id = NULL;
        $values['amount'] = $recurContrib->amount;
        $values['financial_type_id'] = $objects['contributionType']->id;
        $values['title'] = $source = ts('Offline Recurring Contribution');
        $domainValues = CRM_Core_BAO_Domain::getNameAndEmail();
        $values['receipt_from_name'] = $domainValues[0];
        $values['receipt_from_email'] = $domainValues[1];
      }
      if ($recurContrib && $recurContrib->id) {
        //CRM-13273 - is_email_receipt setting on recurring contribution should take precedence over contribution page setting
        $values['is_email_receipt'] = $recurContrib->is_email_receipt;
      }

      $contribution->source = $source;
      if (!empty($values['is_email_receipt'])) {
        $contribution->receipt_date = self::$_now;
      }

      if (!empty($memberships)) {
        $membershipsUpdate = array();
        foreach ($memberships as $membershipTypeIdKey => $membership) {
          if ($membership) {
            $format = '%Y%m%d';

            $currentMembership = CRM_Member_BAO_Membership::getContactMembership($membership->contact_id,
              $membership->membership_type_id,
              $membership->is_test, $membership->id
            );

            // CRM-8141 update the membership type with the value recorded in log when membership created/renewed
            // this picks up membership type changes during renewals
            $sql = "
SELECT    membership_type_id
FROM      civicrm_membership_log
WHERE     membership_id=$membership->id
ORDER BY  id DESC
LIMIT 1;";
            $dao = new CRM_Core_DAO();
            $dao->query($sql);
            if ($dao->fetch()) {
              if (!empty($dao->membership_type_id)) {
                $membership->membership_type_id = $dao->membership_type_id;
                $membership->save();
              }
              // else fall back to using current membership type
            }
            // else fall back to using current membership type
            $dao->free();

            $num_terms = $contribution->getNumTermsByContributionAndMembershipType($membership->membership_type_id, $primaryContributionID);
            if ($currentMembership) {
              /*
               * Fixed FOR CRM-4433
               * In BAO/Membership.php(renewMembership function), we skip the extend membership date and status
               * when Contribution mode is notify and membership is for renewal )
               */
              CRM_Member_BAO_Membership::fixMembershipStatusBeforeRenew($currentMembership, $changeToday);

              // @todo - we should pass membership_type_id instead of null here but not
              // adding as not sure of testing
              $dates = CRM_Member_BAO_MembershipType::getRenewalDatesForMembershipType($membership->id,
                $changeToday, NULL, $num_terms
              );

              $dates['join_date'] = CRM_Utils_Date::customFormat($currentMembership['join_date'], $format);
            }
            else {
              $dates = CRM_Member_BAO_MembershipType::getDatesForMembershipType($membership->membership_type_id, NULL, NULL, NULL, $num_terms);
            }

            //get the status for membership.
            $calcStatus = CRM_Member_BAO_MembershipStatus::getMembershipStatusByDate($dates['start_date'],
              $dates['end_date'],
              $dates['join_date'],
              'today',
              TRUE,
              $membership->membership_type_id,
              (array) $membership
            );

            $formatedParams = array(
              'status_id' => CRM_Utils_Array::value('id', $calcStatus, 2),
              'join_date' => CRM_Utils_Date::customFormat(CRM_Utils_Array::value('join_date', $dates), $format),
              'start_date' => CRM_Utils_Date::customFormat(CRM_Utils_Array::value('start_date', $dates), $format),
              'end_date' => CRM_Utils_Date::customFormat(CRM_Utils_Array::value('end_date', $dates), $format),
            );
            //we might be renewing membership,
            //so make status override false.
            $formatedParams['is_override'] = FALSE;
            $membership->copyValues($formatedParams);
            $membership->save();

            //updating the membership log
            $membershipLog = array();
            $membershipLog = $formatedParams;

            $logStartDate = $formatedParams['start_date'];
            if (!empty($dates['log_start_date'])) {
              $logStartDate = CRM_Utils_Date::customFormat($dates['log_start_date'], $format);
              $logStartDate = CRM_Utils_Date::isoToMysql($logStartDate);
            }

            $membershipLog['start_date'] = $logStartDate;
            $membershipLog['membership_id'] = $membership->id;
            $membershipLog['modified_id'] = $membership->contact_id;
            $membershipLog['modified_date'] = date('Ymd');
            $membershipLog['membership_type_id'] = $membership->membership_type_id;

            CRM_Member_BAO_MembershipLog::add($membershipLog, CRM_Core_DAO::$_nullArray);

            //update related Memberships.
            CRM_Member_BAO_Membership::updateRelatedMemberships($membership->id, $formatedParams);

            //update the membership type key of membership relatedObjects array
            //if it has changed after membership update
            if ($membershipTypeIdKey != $membership->membership_type_id) {
              $membershipsUpdate[$membership->membership_type_id] = $membership;
              $contribution->_relatedObjects['membership'][$membership->membership_type_id] = $membership;
              unset($contribution->_relatedObjects['membership'][$membershipTypeIdKey]);
              unset($memberships[$membershipTypeIdKey]);
            }
          }
        }
        //update the memberships object with updated membershipTypeId data
        //if membershipTypeId has changed after membership update
        if (!empty($membershipsUpdate)) {
          $memberships = $memberships + $membershipsUpdate;
        }
      }
    }
    else {
      // event
      $eventParams = array('id' => $objects['event']->id);
      $values['event'] = array();

      CRM_Event_BAO_Event::retrieve($eventParams, $values['event']);

      //get location details
      $locationParams = array('entity_id' => $objects['event']->id, 'entity_table' => 'civicrm_event');
      $values['location'] = CRM_Core_BAO_Location::getValues($locationParams);

      $ufJoinParams = array(
        'entity_table' => 'civicrm_event',
        'entity_id' => $ids['event'],
        'module' => 'CiviEvent',
      );

      list($custom_pre_id,
        $custom_post_ids
        ) = CRM_Core_BAO_UFJoin::getUFGroupIds($ufJoinParams);

      $values['custom_pre_id'] = $custom_pre_id;
      $values['custom_post_id'] = $custom_post_ids;
      //for tasks 'Change Participant Status' and 'Batch Update Participants Via Profile' case
      //and cases involving status updation through ipn
      $values['totalAmount'] = $input['amount'];

      $contribution->source = ts('Online Event Registration') . ': ' . $values['event']['title'];

      if ($values['event']['is_email_confirm']) {
        $contribution->receipt_date = self::$_now;
        $values['is_email_receipt'] = 1;
      }
      if (empty($input['skipComponentSync'])) {
        $participantStatuses = CRM_Core_PseudoConstant::get('CRM_Event_DAO_Participant', 'status_id', array(
            'labelColumn' => 'name',
            'flip' => 1,
          ));
        $participant->status_id = $participantStatuses['Registered'];
      }
      $participant->save();
    }

    if (CRM_Utils_Array::value('net_amount', $input, 0) == 0 &&
      CRM_Utils_Array::value('fee_amount', $input, 0) != 0
    ) {
      $input['net_amount'] = $input['amount'] - $input['fee_amount'];
    }
    $addLineItems = FALSE;
    if (empty($contribution->id)) {
      $addLineItems = TRUE;
    }
    $contributionStatuses = CRM_Core_PseudoConstant::get('CRM_Contribute_DAO_Contribution', 'contribution_status_id', array(
        'labelColumn' => 'name',
        'flip' => 1,
      ));
    $contribution->contribution_status_id = $contributionStatuses['Completed'];
    $contribution->is_test = $input['is_test'];
    $contribution->fee_amount = CRM_Utils_Array::value('fee_amount', $input, 0);
    $contribution->net_amount = CRM_Utils_Array::value('net_amount', $input, 0);
    $contribution->trxn_id = $input['trxn_id'];
    $contribution->receive_date = CRM_Utils_Date::isoToMysql($contribution->receive_date);
    $contribution->thankyou_date = CRM_Utils_Date::isoToMysql($contribution->thankyou_date);
    $contribution->receipt_date = CRM_Utils_Date::isoToMysql($contribution->receipt_date);
    $contribution->cancel_date = 'null';

    if (!empty($input['check_number'])) {
      $contribution->check_number = $input['check_number'];
    }

    if (!empty($input['payment_instrument_id'])) {
      $contribution->payment_instrument_id = $input['payment_instrument_id'];
    }

    if ($contribution->id) {
      $contributionId['id'] = $contribution->id;
      $input['prevContribution'] = CRM_Contribute_BAO_Contribution::getValues($contributionId, CRM_Core_DAO::$_nullArray, CRM_Core_DAO::$_nullArray);
    }
    $contribution->save();

    // Add new soft credit against current $contribution.
    if (CRM_Utils_Array::value('contributionRecur', $objects) && $objects['contributionRecur']->id) {
      $this->addrecurSoftCredit($objects['contributionRecur']->id, $contribution->id);
    }

    //add lineitems for recurring payments
    if (!empty($objects['contributionRecur']) && $objects['contributionRecur']->id) {
      if ($addLineItems) {
        $input['line_item'] = $this->addRecurLineItems($objects['contributionRecur']->id, $contribution);
      }
      else {
        // this is just to prevent e-notices when we call recordFinancialAccounts - per comments on that line - intention is somewhat unclear
        $input['line_item'] = array();
      }
    }

    //copy initial contribution custom fields for recurring contributions
    if ($recurContrib && $recurContrib->id) {
      $this->copyCustomValues($recurContrib->id, $contribution->id);
    }

    // next create the transaction record
    $paymentProcessor = $paymentProcessorId = '';
    if (isset($objects['paymentProcessor'])) {
      if (is_array($objects['paymentProcessor'])) {
        $paymentProcessor = $objects['paymentProcessor']['payment_processor_type'];
        $paymentProcessorId = $objects['paymentProcessor']['id'];
      }
      else {
        $paymentProcessor = $objects['paymentProcessor']->payment_processor_type;
        $paymentProcessorId = $objects['paymentProcessor']->id;
      }
    }
    //it's hard to see how it could reach this point without a contributon id as it is saved in line 511 above
    // which raised the question as to whether this check preceded line 511 & if so whether something could be broken
    // From a lot of code reading /debugging I'm still not sure the intent WRT first & subsequent payments in this code
    // it would be good if someone added some comments or refactored this
    if ($contribution->id) {
      $contributionStatuses = CRM_Core_PseudoConstant::get('CRM_Contribute_DAO_Contribution', 'contribution_status_id', array(
          'labelColumn' => 'name',
          'flip' => 1,
        ));
      if ((empty($input['prevContribution']) && $paymentProcessorId) || (!$input['prevContribution']->is_pay_later && $input['prevContribution']->contribution_status_id == $contributionStatuses['Pending'])) {
        $input['payment_processor'] = $paymentProcessorId;
      }
      $input['contribution_status_id'] = $contributionStatuses['Completed'];
      $input['total_amount'] = $input['amount'];
      $input['contribution'] = $contribution;
      $input['financial_type_id'] = $contribution->financial_type_id;

      if (!empty($contribution->_relatedObjects['participant'])) {
        $input['contribution_mode'] = 'participant';
        $input['participant_id'] = $contribution->_relatedObjects['participant']->id;
        $input['skipLineItem'] = 1;
      }
      elseif (!empty($contribution->_relatedObjects['membership'])) {
        $input['skipLineItem'] = TRUE;
        $input['contribution_mode'] = 'membership';
      }
      //@todo writing a unit test I was unable to create a scenario where this line did not fatal on second
      // and subsequent payments. In this case the line items are created at $this->addRecurLineItems
      // and since the contribution is saved prior to this line there is always a contribution-id,
      // however there is never a prevContribution (which appears to mean original contribution not previous
      // contribution - or preUpdateContributionObject most accurately)
      // so, this is always called & only appears to succeed when prevContribution exists - which appears
      // to mean "are we updating an exisitng pending contribution"
      //I was able to make the unit test complete as fataling here doesn't prevent
      // the contribution being created - but activities would not be created or emails sent

      CRM_Contribute_BAO_Contribution::recordFinancialAccounts($input, NULL);
    }

    self::updateRecurLinkedPledge($contribution);

    // create an activity record
    if ($input['component'] == 'contribute') {
      //CRM-4027
      $targetContactID = NULL;
      if (!empty($ids['related_contact'])) {
        $targetContactID = $contribution->contact_id;
        $contribution->contact_id = $ids['related_contact'];
      }
      CRM_Activity_BAO_Activity::addActivity($contribution, NULL, $targetContactID);
      // event
    }
    else {
      CRM_Activity_BAO_Activity::addActivity($participant);
    }

    CRM_Core_Error::debug_log_message("Contribution record updated successfully");
    $transaction->commit();

    // CRM-9132 legacy behaviour was that receipts were sent out in all instances. Still sending
    // when array_key 'is_email_receipt doesn't exist in case some instances where is needs setting haven't been set
    if (!array_key_exists('is_email_receipt', $values) ||
      $values['is_email_receipt'] == 1
    ) {
      self::sendMail($input, $ids, $objects, $values, $recur, FALSE);
      CRM_Core_Error::debug_log_message("Receipt sent");
    }

    CRM_Core_Error::debug_log_message("Success: Database updated");
    if ($this->_isRecurring) {
      $this->sendRecurringStartOrEndNotification($ids, $recur);
    }
  }

  /**
   * @param $ids
   *
   * @return bool
   */
  public function getBillingID(&$ids) {
    // get the billing location type
    $locationTypes = CRM_Core_PseudoConstant::get('CRM_Core_DAO_Address', 'location_type_id', array(), 'validate');
    // CRM-8108 remove the ts around the Billing locationtype
    //$ids['billing'] =  array_search( ts('Billing'),  $locationTypes );
    $ids['billing'] = array_search('Billing', $locationTypes);
    if (!$ids['billing']) {
      CRM_Core_Error::debug_log_message(ts('Please set a location type of %1', array(1 => 'Billing')));
      echo "Failure: Could not find billing location type<p>";
      return FALSE;
    }
    return TRUE;
  }

  /**
   * Send receipt from contribution. Note that the compose message part has been moved to contribution
   * In general LoadObjects is called first to get the objects but the composeMessageArray function now calls it
   *
   * @param array $input
   *   Incoming data from Payment processor.
   * @param array $ids
   *   Related object IDs.
   * @param $objects
   * @param array $values
   *   Values related to objects that have already been loaded.
   * @param bool $recur
   *   Is it part of a recurring contribution.
   * @param bool $returnMessageText
   *   Should text be returned instead of sent. This.
   *   is because the function is also used to generate pdfs
   *
   * @return array
   */
  public function sendMail(&$input, &$ids, &$objects, &$values, $recur = FALSE, $returnMessageText = FALSE) {
    $contribution = &$objects['contribution'];
    $input['is_recur'] = $recur;
    // set receipt from e-mail and name in value
    if (!$returnMessageText) {
      $session = CRM_Core_Session::singleton();
      $userID = $session->get('userID');
      if (!empty($userID)) {
        list($userName, $userEmail) = CRM_Contact_BAO_Contact_Location::getEmailDetails($userID);
        $values['receipt_from_email'] = $userEmail;
        $values['receipt_from_name'] = $userName;
      }
    }
    return $contribution->composeMessageArray($input, $ids, $values, $recur, $returnMessageText);
  }

  /**
   * Send start or end notification for recurring payments.
   * @param $ids
   * @param $recur
   */
  public function sendRecurringStartOrEndNotification($ids, $recur) {
    if ($this->_isFirstOrLastRecurringPayment) {
      $autoRenewMembership = FALSE;
      if ($recur->id &&
        isset($ids['membership']) && $ids['membership']
      ) {
        $autoRenewMembership = TRUE;
      }

      //send recurring Notification email for user
      CRM_Contribute_BAO_ContributionPage::recurringNotify($this->_isFirstOrLastRecurringPayment,
        $ids['contact'],
        $ids['contributionPage'],
        $recur,
        $autoRenewMembership
      );
    }
  }

  /**
   * Update contribution status - this is only called from one place in the code &
   * it is unclear whether it is a function on the way in or on the way out
   *
   * @param array $params
   * @return void|NULL|int
   */
  public function updateContributionStatus(&$params) {
    // get minimum required values.
    $statusId = CRM_Utils_Array::value('contribution_status_id', $params);
    $componentId = CRM_Utils_Array::value('component_id', $params);
    $componentName = CRM_Utils_Array::value('componentName', $params);
    $contributionId = CRM_Utils_Array::value('contribution_id', $params);

    if (!$contributionId || !$componentId || !$componentName || !$statusId) {
      return NULL;
    }

    $input = $ids = $objects = array();

    //get the required ids.
    $ids['contribution'] = $contributionId;

    if (!$ids['contact'] = CRM_Utils_Array::value('contact_id', $params)) {
      $ids['contact'] = CRM_Core_DAO::getFieldValue('CRM_Contribute_DAO_Contribution',
        $contributionId,
        'contact_id'
      );
    }

    if ($componentName == 'Event') {
      $name = 'event';
      $ids['participant'] = $componentId;

      if (!$ids['event'] = CRM_Utils_Array::value('event_id', $params)) {
        $ids['event'] = CRM_Core_DAO::getFieldValue('CRM_Event_DAO_Participant',
          $componentId,
          'event_id'
        );
      }
    }

    if ($componentName == 'Membership') {
      $name = 'contribute';
      $ids['membership'] = $componentId;
    }
    $ids['contributionPage'] = NULL;
    $ids['contributionRecur'] = NULL;
    $input['component'] = $name;

    $baseIPN = new CRM_Core_Payment_BaseIPN();
    $transaction = new CRM_Core_Transaction();

    // reset template values.
    $template = CRM_Core_Smarty::singleton();
    $template->clearTemplateVars();

    if (!$baseIPN->validateData($input, $ids, $objects, FALSE)) {
      CRM_Core_Error::fatal();
    }

    $contribution = &$objects['contribution'];

    $contributionStatuses = CRM_Core_PseudoConstant::get('CRM_Contribute_DAO_Contribution', 'contribution_status_id', array(
        'labelColumn' => 'name',
        'flip' => 1,
      ));
    $input['skipComponentSync'] = CRM_Utils_Array::value('skipComponentSync', $params);
    if ($statusId == $contributionStatuses['Cancelled']) {
      $baseIPN->cancelled($objects, $transaction, $input);
      $transaction->commit();
      return $statusId;
    }
    elseif ($statusId == $contributionStatuses['Failed']) {
      $baseIPN->failed($objects, $transaction, $input);
      $transaction->commit();
      return $statusId;
    }

    // status is not pending
    if ($contribution->contribution_status_id != $contributionStatuses['Pending']) {
      $transaction->commit();
      return;
    }

    //set values for ipn code.
    foreach (array(
               'fee_amount',
               'check_number',
               'payment_instrument_id',
             ) as $field) {
      if (!$input[$field] = CRM_Utils_Array::value($field, $params)) {
        $input[$field] = $contribution->$field;
      }
    }
    if (!$input['trxn_id'] = CRM_Utils_Array::value('trxn_id', $params)) {
      $input['trxn_id'] = $contribution->invoice_id;
    }
    if (!$input['amount'] = CRM_Utils_Array::value('total_amount', $params)) {
      $input['amount'] = $contribution->total_amount;
    }
    $input['is_test'] = $contribution->is_test;
    $input['net_amount'] = $contribution->net_amount;
    if (!empty($input['fee_amount']) && !empty($input['amount'])) {
      $input['net_amount'] = $input['amount'] - $input['fee_amount'];
    }

    //complete the contribution.
    $baseIPN->completeTransaction($input, $ids, $objects, $transaction, FALSE);

    // reset template values before processing next transactions
    $template->clearTemplateVars();

    return $statusId;
  }

  /**
   * Update pledge associated with a recurring contribution.
   *
   * If the contribution has a pledge_payment record pledge, then update the pledge_payment record & pledge based on that linkage.
   *
   * If a previous contribution in the recurring contribution sequence is linked with a pledge then we assume this contribution
   * should be  linked with the same pledge also. Currently only back-office users can apply a recurring payment to a pledge &
   * it should be assumed they
   * do so with the intention that all payments will be linked
   *
   * The pledge payment record should already exist & will need to be updated with the new contribution ID.
   * If not the contribution will also need to be linked to the pledge
   *
   * @param CRM_Contribute_BAO_Contribution $contribution
   */
  public function updateRecurLinkedPledge(&$contribution) {
    $returnProperties = array('id', 'pledge_id');
    $paymentDetails = $paymentIDs = array();

    if (CRM_Core_DAO::commonRetrieveAll('CRM_Pledge_DAO_PledgePayment', 'contribution_id', $contribution->id,
      $paymentDetails, $returnProperties
    )
    ) {
      foreach ($paymentDetails as $key => $value) {
        $paymentIDs[] = $value['id'];
        $pledgeId = $value['pledge_id'];
      }
    }
    else {
      //payment is not already linked - if it is linked with a pledge we need to create a link.
      // return if it is not recurring contribution
      if (!$contribution->contribution_recur_id) {
        return;
      }

      $relatedContributions = new CRM_Contribute_DAO_Contribution();
      $relatedContributions->contribution_recur_id = $contribution->contribution_recur_id;
      $relatedContributions->find();

      while ($relatedContributions->fetch()) {
        CRM_Core_DAO::commonRetrieveAll('CRM_Pledge_DAO_PledgePayment', 'contribution_id', $relatedContributions->id,
          $paymentDetails, $returnProperties
        );
      }

      if (empty($paymentDetails)) {
        // payment is not linked with a pledge and neither are any other contributions on this
        return;
      }

      foreach ($paymentDetails as $key => $value) {
        $pledgeId = $value['pledge_id'];
      }

      // we have a pledge now we need to get the oldest unpaid payment
      $paymentDetails = CRM_Pledge_BAO_PledgePayment::getOldestPledgePayment($pledgeId);
      if (empty($paymentDetails['id'])) {
        // we can assume this pledge is now completed
        // return now so we don't create a core error & roll back
        return;
      }
      $paymentDetails['contribution_id'] = $contribution->id;
      $paymentDetails['status_id'] = $contribution->contribution_status_id;
      $paymentDetails['actual_amount'] = $contribution->total_amount;

      // put contribution against it
      $payment = CRM_Pledge_BAO_PledgePayment::add($paymentDetails);
      $paymentIDs[] = $payment->id;
    }

    // update pledge and corresponding payment statuses
    CRM_Pledge_BAO_PledgePayment::updatePledgePaymentStatus($pledgeId, $paymentIDs, $contribution->contribution_status_id,
      NULL, $contribution->total_amount
    );
  }

  /**
   * @param int $recurId
   * @param $contribution
   *
   * @return array
   */
  public function addRecurLineItems($recurId, $contribution) {
    $lineSets = array();

    $originalContributionID = CRM_Core_DAO::getFieldValue('CRM_Contribute_DAO_Contribution', $recurId, 'id', 'contribution_recur_id');
    $lineItems = CRM_Price_BAO_LineItem::getLineItemsByContributionID($originalContributionID);
    if (!empty($lineItems)) {
      foreach ($lineItems as $key => $value) {
        $priceField = new CRM_Price_DAO_PriceField();
        $priceField->id = $value['price_field_id'];
        $priceField->find(TRUE);
        $lineSets[$priceField->price_set_id][] = $value;
        if ($value['entity_table'] == 'civicrm_membership') {
          try {
            civicrm_api3('membership_payment', 'create', array(
                'membership_id' => $value['entity_id'],
                'contribution_id' => $contribution->id,
              ));
          }
          catch (CiviCRM_API3_Exception $e) {
            // we are catching & ignoring errors as an extra precaution since lost IPNs may be more serious that lost membership_payment data
            // this fn is unit-tested so risk of changes elsewhere breaking it are otherwise mitigated
          }
        }
      }
    }
    else {
      CRM_Price_BAO_LineItem::processPriceSet($contribution->id, $lineSets, $contribution);
    }
    return $lineSets;
  }

  /**
   * copy custom data of the initial contribution into its recurring contributions.
   * @param int $recurId
   * @param int $targetContributionId
   */
  public function copyCustomValues($recurId, $targetContributionId) {
    if ($recurId && $targetContributionId) {
      // get the initial contribution id of recur id
      $sourceContributionId = CRM_Core_DAO::getFieldValue('CRM_Contribute_DAO_Contribution', $recurId, 'id', 'contribution_recur_id');

      // if the same contribution is being proccessed then return
      if ($sourceContributionId == $targetContributionId) {
        return;
      }
      // check if proper recurring contribution record is being processed
      $targetConRecurId = CRM_Core_DAO::getFieldValue('CRM_Contribute_DAO_Contribution', $targetContributionId, 'contribution_recur_id');
      if ($targetConRecurId != $recurId) {
        return;
      }

      // copy custom data
      $extends = array('Contribution');
      $groupTree = CRM_Core_BAO_CustomGroup::getGroupDetail(NULL, NULL, $extends);
      if ($groupTree) {
        foreach ($groupTree as $groupID => $group) {
          $table[$groupTree[$groupID]['table_name']] = array('entity_id');
          foreach ($group['fields'] as $fieldID => $field) {
            $table[$groupTree[$groupID]['table_name']][] = $groupTree[$groupID]['fields'][$fieldID]['column_name'];
          }
        }

        foreach ($table as $tableName => $tableColumns) {
          $insert = 'INSERT INTO ' . $tableName . ' (' . implode(', ', $tableColumns) . ') ';
          $tableColumns[0] = $targetContributionId;
          $select = 'SELECT ' . implode(', ', $tableColumns);
          $from = ' FROM ' . $tableName;
          $where = " WHERE {$tableName}.entity_id = {$sourceContributionId}";
          $query = $insert . $select . $from . $where;
          $dao = CRM_Core_DAO::executeQuery($query, CRM_Core_DAO::$_nullArray);
        }
      }
    }
  }

  /**
   * copy soft credit record of first recurring contribution.
   * and add new soft credit against $targetContributionId
   *
   * @param int $recurId
   * @param int $targetContributionId
   */
  public function addrecurSoftCredit($recurId, $targetContributionId) {
    $contriID = CRM_Core_DAO::getFieldValue('CRM_Contribute_DAO_Contribution', $recurId, 'id', 'contribution_recur_id');

    $soft_contribution = new CRM_Contribute_DAO_ContributionSoft();
    $soft_contribution->contribution_id = $contriID;

    //check if first recurring contribution has any associated soft credit
    if ($soft_contribution->find(TRUE)) {
      $soft_contribution->contribution_id = $targetContributionId;
      unset($soft_contribution->id);
      $soft_contribution->save();
    }
  }

}