From 49f68a2237cb60edd6af30d8c6874cd7a385a387 Mon Sep 17 00:00:00 2001
From: "Donald A. Lobo" <lobo@civicrm.org>
Date: Tue, 5 Mar 2013 14:57:30 -0800
Subject: [PATCH] fix CRM-11435

---
 CRM/Event/BAO/Event.php        | 21 +++++++++++++++++++++
 CRM/Event/Form/ManageEvent.php | 18 ++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/CRM/Event/BAO/Event.php b/CRM/Event/BAO/Event.php
index 2da65110de..d265d82413 100644
--- a/CRM/Event/BAO/Event.php
+++ b/CRM/Event/BAO/Event.php
@@ -2006,5 +2006,26 @@ LEFT  JOIN  civicrm_price_field_value value ON ( value.id = lineItem.price_field
     $defaults = array();
     return CRM_Event_BAO_Event::retrieve($params, $defaults);
   }
+
+  /*
+   * Update the Campaign Id of all the participants of the given event
+   *
+   * @params int $eventID event id.
+   * @params int $eventCampaignID campaign id of that event
+   *
+   */
+  static function updateParticipantCampaignID($eventID, $eventCampaignID) {
+    $params = array();
+    $params[1] = array($eventID, 'Integer');
+
+    if(empty($eventCampaignID)) {
+      $query = "UPDATE civicrm_participant SET campaign_id = NULL WHERE event_id = %1";
+    }
+    else {
+      $query = "UPDATE civicrm_participant SET campaign_id = %2 WHERE event_id = %1";
+      $params[2] = array($eventCampaignID, 'Integer');
+    }
+    CRM_Core_DAO::executeQuery($query, $params);
+  }
 }
 
diff --git a/CRM/Event/Form/ManageEvent.php b/CRM/Event/Form/ManageEvent.php
index 2c52ba6bc1..bf04dbb559 100644
--- a/CRM/Event/Form/ManageEvent.php
+++ b/CRM/Event/Form/ManageEvent.php
@@ -79,6 +79,12 @@ class CRM_Event_Form_ManageEvent extends CRM_Core_Form {
 
   protected $_cancelURL = NULL;
 
+  /**
+   * The campaign id of the existing event, we use this to know if we need to update
+   * the participant records
+   */
+  protected $_campaignID = NULL;
+
   /**
    * Function to set variables up before form is built
    *
@@ -214,6 +220,8 @@ class CRM_Event_Form_ManageEvent extends CRM_Core_Form {
     if (isset($this->_id)) {
       $params = array('id' => $this->_id);
       CRM_Event_BAO_Event::retrieve($params, $defaults);
+
+      $this->_campaignID = CRM_Utils_Array::value('campaign_id', $defaults);
     }
     elseif ($this->_templateId) {
       $params = array('id' => $this->_templateId);
@@ -333,6 +341,16 @@ class CRM_Event_Form_ManageEvent extends CRM_Core_Form {
           array(1 => ($subPage == 'friend') ? 'Friend' : $className)
         ), ts('Saved'), 'success');
 
+      $config = CRM_Core_Config::singleton();
+      if (in_array('CiviCampaign', $config->enableComponents)) {
+        $values = $this->controller->exportValues($this->_name);
+        $newCampaignID = CRM_Utils_Array::value('campaign_id', $values);
+        $eventID = CRM_Utils_Array::value('id', $values);
+        if ($eventID && $this->_campaignID != $newCampaignID) {
+          CRM_Event_BAO_Event::updateParticipantCampaignID($eventID, $newCampaignID);
+        }
+      }
+
       $this->postProcessHook();
 
       if ($this->controller->getButtonName('submit') == "_qf_{$className}_upload_done") {
-- 
2.25.1