/**
  * Resubscribe a contact to the groups, he/she was unsubscribed from.
  *
  * @param int $job_id       The job ID
  * @param int $queue_id     The Queue Event ID of the recipient
  * @param string $hash      The hash
  * @return array|null $groups    Array of all groups to which the contact was added, or null if the queue event could not be found.
  * @access public
  * @static
  */
 public static function &resub_to_mailing($job_id, $queue_id, $hash)
 {
     /* First make sure there's a matching queue event */
     $q =& CRM_Mailing_Event_BAO_Queue::verify($job_id, $queue_id, $hash);
     $success = null;
     if (!$q) {
         return $success;
     }
     // check if this queue_id was actually unsubscribed
     $ue = new CRM_Mailing_Event_BAO_Unsubscribe();
     $ue->event_queue_id = $queue_id;
     $ue->org_unsubscribe = 0;
     if (!$ue->find(true)) {
         return $success;
     }
     $contact_id = $q->contact_id;
     require_once 'CRM/Core/Transaction.php';
     $transaction = new CRM_Core_Transaction();
     $do = new CRM_Core_DAO();
     $mg = CRM_Mailing_DAO_Group::getTableName();
     $job = CRM_Mailing_BAO_Job::getTableName();
     $mailing = CRM_Mailing_BAO_Mailing::getTableName();
     $group = CRM_Contact_BAO_Group::getTableName();
     $gc = CRM_Contact_BAO_GroupContact::getTableName();
     $do->query("\n            SELECT      {$mg}.entity_table as entity_table,\n                        {$mg}.entity_id as entity_id\n            FROM        {$mg}\n            INNER JOIN  {$job}\n                ON      {$job}.mailing_id = {$mg}.mailing_id\n            WHERE       {$job}.id = " . CRM_Utils_Type::escape($job_id, 'Integer') . "\n                AND     {$mg}.group_type = 'Include'");
     /* Make a list of groups and a list of prior mailings that received 
      * this mailing */
     $groups = array();
     $mailings = array();
     while ($do->fetch()) {
         if ($do->entity_table == $group) {
             $groups[$do->entity_id] = null;
         } else {
             if ($do->entity_table == $mailing) {
                 $mailings[] = $do->entity_id;
             }
         }
     }
     /* As long as we have prior mailings, find their groups and add to the
      * list */
     while (!empty($mailings)) {
         $do->query("\n                SELECT      {$mg}.entity_table as entity_table,\n                            {$mg}.entity_id as entity_id\n                FROM        {$mg}\n                WHERE       {$mg}.mailing_id IN (" . implode(', ', $mailings) . ")\n                    AND     {$mg}.group_type = 'Include'");
         $mailings = array();
         while ($do->fetch()) {
             if ($do->entity_table == $group) {
                 $groups[$do->entity_id] = true;
             } else {
                 if ($do->entity_table == $mailing) {
                     $mailings[] = $do->entity_id;
                 }
             }
         }
     }
     /* Now we have a complete list of recipient groups.  Filter out all
      * those except smart groups and those that the contact belongs to */
     $do->query("\n            SELECT      {$group}.id as group_id,\n                        {$group}.title as title\n            FROM        {$group}\n            LEFT JOIN   {$gc}\n                ON      {$gc}.group_id = {$group}.id\n            WHERE       {$group}.id IN (" . implode(', ', array_keys($groups)) . ")\n                AND     ({$group}.saved_search_id is not null\n                            OR  ({$gc}.contact_id = {$contact_id}\n                                AND {$gc}.status = 'Removed')\n                        )");
     while ($do->fetch()) {
         $groups[$do->group_id] = $do->title;
     }
     $contacts = array($contact_id);
     foreach ($groups as $group_id => $group_name) {
         $notadded = 0;
         if ($group_name) {
             list($total, $added, $notadded) = CRM_Contact_BAO_GroupContact::addContactsToGroup($contacts, $group_id, 'Email');
         }
         if ($notadded) {
             unset($groups[$group_id]);
         }
     }
     // remove entry from Unsubscribe table.
     $ue = new CRM_Mailing_Event_BAO_Unsubscribe();
     $ue->event_queue_id = $queue_id;
     $ue->org_resubscribe = 0;
     if ($ue->find(true)) {
         $ue->delete();
     }
     $transaction->commit();
     return $groups;
 }
 /**
  * Resubscribe a contact to the groups, he/she was unsubscribed from.
  *
  * @param int $job_id
  *   The job ID.
  * @param int $queue_id
  *   The Queue Event ID of the recipient.
  * @param string $hash
  *   The hash.
  *
  * @return array|null
  *   $groups    Array of all groups to which the contact was added, or null if the queue event could not be found.
  */
 public static function &resub_to_mailing($job_id, $queue_id, $hash)
 {
     // First make sure there's a matching queue event.
     $q = CRM_Mailing_Event_BAO_Queue::verify($job_id, $queue_id, $hash);
     $success = NULL;
     if (!$q) {
         return $success;
     }
     // check if this queue_id was actually unsubscribed
     $ue = new CRM_Mailing_Event_BAO_Unsubscribe();
     $ue->event_queue_id = $queue_id;
     $ue->org_unsubscribe = 0;
     if (!$ue->find(TRUE)) {
         return $success;
     }
     $contact_id = $q->contact_id;
     $transaction = new CRM_Core_Transaction();
     $do = new CRM_Core_DAO();
     $mg = CRM_Mailing_DAO_MailingGroup::getTableName();
     $job = CRM_Mailing_BAO_MailingJob::getTableName();
     $mailing = CRM_Mailing_BAO_Mailing::getTableName();
     $group = CRM_Contact_BAO_Group::getTableName();
     $gc = CRM_Contact_BAO_GroupContact::getTableName();
     // We Need the mailing Id for the hook...
     $do->query("SELECT {$job}.mailing_id as mailing_id\n                     FROM   {$job}\n                     WHERE {$job}.id = " . CRM_Utils_Type::escape($job_id, 'Integer'));
     $do->fetch();
     $mailing_id = $do->mailing_id;
     $do->query("\n            SELECT      {$mg}.entity_table as entity_table,\n                        {$mg}.entity_id as entity_id\n            FROM        {$mg}\n            INNER JOIN  {$job}\n                ON      {$job}.mailing_id = {$mg}.mailing_id\n            INNER JOIN  {$group}\n                ON      {$mg}.entity_id = {$group}.id\n            WHERE       {$job}.id = " . CRM_Utils_Type::escape($job_id, 'Integer') . "\n                AND     {$mg}.group_type IN ( 'Include', 'Base' )\n                AND     {$group}.is_hidden = 0");
     // Make a list of groups and a list of prior mailings that received
     // this mailing.
     $groups = array();
     $mailings = array();
     while ($do->fetch()) {
         if ($do->entity_table == $group) {
             $groups[$do->entity_id] = NULL;
         } elseif ($do->entity_table == $mailing) {
             $mailings[] = $do->entity_id;
         }
     }
     // As long as we have prior mailings, find their groups and add to the
     // list.
     while (!empty($mailings)) {
         $do->query("\n                SELECT      {$mg}.entity_table as entity_table,\n                            {$mg}.entity_id as entity_id\n                FROM        {$mg}\n                WHERE       {$mg}.mailing_id IN (" . implode(', ', $mailings) . ")\n                    AND     {$mg}.group_type = 'Include'");
         $mailings = array();
         while ($do->fetch()) {
             if ($do->entity_table == $group) {
                 $groups[$do->entity_id] = TRUE;
             } elseif ($do->entity_table == $mailing) {
                 $mailings[] = $do->entity_id;
             }
         }
     }
     $group_ids = array_keys($groups);
     $base_groups = NULL;
     CRM_Utils_Hook::unsubscribeGroups('resubscribe', $mailing_id, $contact_id, $group_ids, $base_groups);
     // Now we have a complete list of recipient groups.  Filter out all
     // those except smart groups and those that the contact belongs to.
     $do->query("\n            SELECT      {$group}.id as group_id,\n                        {$group}.title as title\n            FROM        {$group}\n            LEFT JOIN   {$gc}\n                ON      {$gc}.group_id = {$group}.id\n            WHERE       {$group}.id IN (" . implode(', ', $group_ids) . ")\n                AND     ({$group}.saved_search_id is not null\n                            OR  ({$gc}.contact_id = {$contact_id}\n                                AND {$gc}.status = 'Removed')\n                        )");
     while ($do->fetch()) {
         $groups[$do->group_id] = $do->title;
     }
     $contacts = array($contact_id);
     foreach ($groups as $group_id => $group_name) {
         $notadded = 0;
         if ($group_name) {
             list($total, $added, $notadded) = CRM_Contact_BAO_GroupContact::addContactsToGroup($contacts, $group_id, 'Email');
         }
         if ($notadded) {
             unset($groups[$group_id]);
         }
     }
     // remove entry from Unsubscribe table.
     $ue = new CRM_Mailing_Event_BAO_Unsubscribe();
     $ue->event_queue_id = $queue_id;
     $ue->org_resubscribe = 0;
     if ($ue->find(TRUE)) {
         $ue->delete();
     }
     $transaction->commit();
     return $groups;
 }