<?php
/*
 +--------------------------------------------------------------------+
 | CiviCRM version 4.7                                                |
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC (c) 2004-2017                                |
 +--------------------------------------------------------------------+
 | 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) 2004-2017
 */

require_once 'Mail/mime.php';

/**
 * Class CRM_Mailing_Event_BAO_Unsubscribe
 */
class CRM_Mailing_Event_BAO_Unsubscribe extends CRM_Mailing_Event_DAO_Unsubscribe {

  /**
   * Class constructor.
   */
  public function __construct() {
    parent::__construct();
  }

  /**
   * Unsubscribe a contact from the domain.
   *
   * @param int $job_id
   *   The job ID.
   * @param int $queue_id
   *   The Queue Event ID of the recipient.
   * @param string $hash
   *   The hash.
   *
   * @return bool
   *   Was the contact successfully unsubscribed?
   */
  public static function unsub_from_domain($job_id, $queue_id, $hash) {
    $q = CRM_Mailing_Event_BAO_Queue::verify($job_id, $queue_id, $hash);
    if (!$q) {
      return FALSE;
    }

    $transaction = new CRM_Core_Transaction();

    $now = date('YmdHis');
    if (CRM_Core_BAO_Email::isMultipleBulkMail()) {
      $email = new CRM_Core_BAO_Email();
      $email->id = $q->email_id;
      if ($email->find(TRUE)) {
        $sql = "
UPDATE civicrm_email
SET    on_hold = 2,
       hold_date = %1
WHERE  email = %2
";
        $sqlParams = array(
          1 => array($now, 'Timestamp'),
          2 => array($email->email, 'String'),
        );
        CRM_Core_DAO::executeQuery($sql, $sqlParams);
      }
    }
    else {
      $contact = new CRM_Contact_BAO_Contact();
      $contact->id = $q->contact_id;
      $contact->is_opt_out = TRUE;
      $contact->save();
    }

    $ue = new CRM_Mailing_Event_BAO_Unsubscribe();
    $ue->event_queue_id = $queue_id;
    $ue->org_unsubscribe = 1;
    $ue->time_stamp = $now;
    $ue->save();

    $shParams = array(
      'contact_id' => $q->contact_id,
      'group_id' => NULL,
      'status' => 'Removed',
      'method' => 'Email',
      'tracking' => $ue->id,
    );
    CRM_Contact_BAO_SubscriptionHistory::create($shParams);

    $transaction->commit();

    return TRUE;
  }

  /**
   * Unsubscribe a contact from all groups that received this mailing.
   *
   * @param int $job_id
   *   The job ID.
   * @param int $queue_id
   *   The Queue Event ID of the recipient.
   * @param string $hash
   *   The hash.
   * @param bool $return
   *   If true return the list of groups.
   *
   * @return array|null
   *   $groups    Array of all groups from which the contact was removed, or null if the queue event could not be found.
   */
  public static function &unsub_from_mailing($job_id, $queue_id, $hash, $return = FALSE) {
    // 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;
    }

    $contact_id = $q->contact_id;
    $transaction = new CRM_Core_Transaction();

    $do = new CRM_Core_DAO();
    $mgObject = new CRM_Mailing_DAO_MailingGroup();
    $mg = $mgObject->getTableName();
    $jobObject = new CRM_Mailing_BAO_MailingJob();
    $job = $jobObject->getTableName();
    $mailingObject = new CRM_Mailing_BAO_Mailing();
    $mailing = $mailingObject->getTableName();
    $groupObject = new CRM_Contact_BAO_Group();
    $group = $groupObject->getTableName();
    $gcObject = new CRM_Contact_BAO_GroupContact();
    $gc = $gcObject->getTableName();
    $abObject = new CRM_Mailing_DAO_MailingAB();
    $ab = $abObject->getTableName();

    //We Need the mailing Id for the hook...
    $do->query("SELECT $job.mailing_id as mailing_id
                     FROM   $job
                     WHERE $job.id = " . CRM_Utils_Type::escape($job_id, 'Integer'));
    $do->fetch();
    $mailing_id = $do->mailing_id;
    $mailing_type = CRM_Core_DAO::getFieldValue('CRM_Mailing_DAO_Mailing', $mailing_id, 'mailing_type', 'id');
    $entity = CRM_Core_DAO::getFieldValue('CRM_Mailing_DAO_MailingGroup', $mailing_id, 'entity_table', 'mailing_id');

    // If $entity is null and $mailing_Type is either winner or experiment then we are deailing with an AB test
    $abtest_types = array('experiment', 'winner');
    if (empty($entity) && in_array($mailing_type, $abtest_types)) {
      $mailing_id_a = CRM_Core_DAO::getFieldValue('CRM_Mailing_DAO_MailingAB', $mailing_id, 'mailing_id_a', 'mailing_id_b');
      $field = 'mailing_id_b';
      if (empty($mailing_id_a)) {
        $mailing_id_a = CRM_Core_DAO::getFieldValue('CRM_Mailing_DAO_MailingAB', $mailing_id, 'mailing_id_a', 'mailing_id_c');
        $field = 'mailing_id_c';
      }
      $jobJoin = "INNER JOIN $ab ON $ab.mailing_id_a = $mg.mailing_id
        INNER JOIN $job ON $job.mailing_id = $ab.$field";
      $entity = CRM_Core_DAO::getFieldValue('CRM_Mailing_DAO_MailingGroup', $mailing_id_a, 'entity_table', 'mailing_id');
    }
    else {
      $jobJoin = "INNER JOIN  $job ON      $job.mailing_id = $mg.mailing_id";
    }

    $groupClause = '';
    if ($entity == $group) {
      $groupClause = "AND $group.is_hidden = 0";
    }

    $do->query("
            SELECT      $mg.entity_table as entity_table,
                        $mg.entity_id as entity_id,
                        $mg.group_type as group_type
            FROM        $mg
            $jobJoin
            INNER JOIN  $entity
                ON      $mg.entity_id = $entity.id
            WHERE       $job.id = " . CRM_Utils_Type::escape($job_id, 'Integer') . "
                AND     $mg.group_type IN ('Include', 'Base') $groupClause"
    );

    // Make a list of groups and a list of prior mailings that received
    // this mailing.

    $groups = array();
    $base_groups = array();
    $mailings = array();

    while ($do->fetch()) {
      if ($do->entity_table == $group) {
        if ($do->group_type == 'Base') {
          $base_groups[$do->entity_id] = NULL;
        }
        else {
          $groups[$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("
                SELECT      $mg.entity_table as entity_table,
                            $mg.entity_id as entity_id
                FROM        $mg
                WHERE       $mg.mailing_id IN (" . implode(', ', $mailings) . ")
                    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;
        }
      }
    }

    //Pass the groups to be unsubscribed from through a hook.
    $groupIds = array_keys($groups);
    //include child groups if any
    $groupIds = array_merge($groupIds, CRM_Contact_BAO_Group::getChildGroupIds($groupIds));

    $baseGroupIds = array_keys($base_groups);
    CRM_Utils_Hook::unsubscribeGroups('unsubscribe', $mailing_id, $contact_id, $groupIds, $baseGroupIds);

    // Now we have a complete list of recipient groups.  Filter out all
    // those except smart groups, those that the contact belongs to and
    // base groups from search based mailings.
    $baseGroupClause = '';
    if (!empty($baseGroupIds)) {
      $baseGroupClause = "OR  $group.id IN(" . implode(', ', $baseGroupIds) . ")";
    }
    $groupIdClause = '';
    if ($groupIds || $baseGroupIds) {
      $groupIdClause = "AND $group.id IN (" . implode(', ', array_merge($groupIds, $baseGroupIds)) . ")";
    }
    $do->query("
            SELECT      $group.id as group_id,
                        $group.title as title,
                        $group.description as description
            FROM        $group
            LEFT JOIN   $gc
                ON      $gc.group_id = $group.id
            WHERE       $group.is_hidden = 0
                        $groupIdClause
                AND     ($group.saved_search_id is not null
                            OR  ($gc.contact_id = $contact_id
                                AND $gc.status = 'Added')
                            $baseGroupClause
                        )");

    if ($return) {
      $returnGroups = array();
      while ($do->fetch()) {
        $returnGroups[$do->group_id] = array(
          'title' => $do->title,
          'description' => $do->description,
        );
      }
      return $returnGroups;
    }
    else {
      while ($do->fetch()) {
        $groups[$do->group_id] = $do->title;
      }
    }

    $contacts = array($contact_id);
    foreach ($groups as $group_id => $group_name) {
      $notremoved = FALSE;
      if ($group_name) {
        if (in_array($group_id, $baseGroupIds)) {
          list($total, $removed, $notremoved) = CRM_Contact_BAO_GroupContact::addContactsToGroup($contacts, $group_id, 'Email', 'Removed');
        }
        else {
          list($total, $removed, $notremoved) = CRM_Contact_BAO_GroupContact::removeContactsFromGroup($contacts, $group_id, 'Email');
        }
      }
      if ($notremoved) {
        unset($groups[$group_id]);
      }
    }

    $ue = new CRM_Mailing_Event_BAO_Unsubscribe();
    $ue->event_queue_id = $queue_id;
    $ue->org_unsubscribe = 0;
    $ue->time_stamp = date('YmdHis');
    $ue->save();

    $transaction->commit();
    return $groups;
  }

  /**
   * Send a response email informing the contact of the groups from which he.
   * has been unsubscribed.
   *
   * @param string $queue_id
   *   The queue event ID.
   * @param array $groups
   *   List of group IDs.
   * @param bool $is_domain
   *   Is this domain-level?.
   * @param int $job
   *   The job ID.
   */
  public static function send_unsub_response($queue_id, $groups, $is_domain = FALSE, $job) {
    $config = CRM_Core_Config::singleton();
    $domain = CRM_Core_BAO_Domain::getDomain();

    $jobObject = new CRM_Mailing_BAO_MailingJob();
    $jobTable = $jobObject->getTableName();
    $mailingObject = new CRM_Mailing_DAO_Mailing();
    $mailingTable = $mailingObject->getTableName();
    $contactsObject = new CRM_Contact_DAO_Contact();
    $contacts = $contactsObject->getTableName();
    $emailObject = new CRM_Core_DAO_Email();
    $email = $emailObject->getTableName();
    $queueObject = new CRM_Mailing_Event_BAO_Queue();
    $queue = $queueObject->getTableName();

    //get the default domain email address.
    list($domainEmailName, $domainEmailAddress) = CRM_Core_BAO_Domain::getNameAndEmail();

    $dao = new CRM_Mailing_BAO_Mailing();
    $dao->query("   SELECT * FROM $mailingTable
                        INNER JOIN $jobTable ON
                            $jobTable.mailing_id = $mailingTable.id
                        WHERE $jobTable.id = $job");
    $dao->fetch();

    $component = new CRM_Mailing_BAO_Component();

    if ($is_domain) {
      $component->id = $dao->optout_id;
    }
    else {
      $component->id = $dao->unsubscribe_id;
    }
    $component->find(TRUE);

    $html = $component->body_html;
    if ($component->body_text) {
      $text = $component->body_text;
    }
    else {
      $text = CRM_Utils_String::htmlToText($component->body_html);
    }

    $eq = new CRM_Core_DAO();
    $eq->query(
      "SELECT     $contacts.preferred_mail_format as format,
                    $contacts.id as contact_id,
                    $email.email as email,
                    $queue.hash as hash
        FROM        $contacts
        INNER JOIN  $queue ON $queue.contact_id = $contacts.id
        INNER JOIN  $email ON $queue.email_id = $email.id
        WHERE       $queue.id = " . CRM_Utils_Type::escape($queue_id, 'Integer')
    );
    $eq->fetch();

    if ($groups) {
      foreach ($groups as $key => $value) {
        if (!$value) {
          unset($groups[$key]);
        }
      }
    }

    $message = new Mail_mime("\n");

    list($addresses, $urls) = CRM_Mailing_BAO_Mailing::getVerpAndUrls($job, $queue_id, $eq->hash, $eq->email);
    $bao = new CRM_Mailing_BAO_Mailing();
    $bao->body_text = $text;
    $bao->body_html = $html;
    $tokens = $bao->getTokens();
    if ($eq->format == 'HTML' || $eq->format == 'Both') {
      $html = CRM_Utils_Token::replaceDomainTokens($html, $domain, TRUE, $tokens['html']);
      $html = CRM_Utils_Token::replaceUnsubscribeTokens($html, $domain, $groups, TRUE, $eq->contact_id, $eq->hash);
      $html = CRM_Utils_Token::replaceActionTokens($html, $addresses, $urls, TRUE, $tokens['html']);
      $html = CRM_Utils_Token::replaceMailingTokens($html, $dao, NULL, $tokens['html']);
      $message->setHTMLBody($html);
    }
    if (!$html || $eq->format == 'Text' || $eq->format == 'Both') {
      $text = CRM_Utils_Token::replaceDomainTokens($text, $domain, FALSE, $tokens['text']);
      $text = CRM_Utils_Token::replaceUnsubscribeTokens($text, $domain, $groups, FALSE, $eq->contact_id, $eq->hash);
      $text = CRM_Utils_Token::replaceActionTokens($text, $addresses, $urls, FALSE, $tokens['text']);
      $text = CRM_Utils_Token::replaceMailingTokens($text, $dao, NULL, $tokens['text']);
      $message->setTxtBody($text);
    }

    $emailDomain = CRM_Core_BAO_MailSettings::defaultDomain();

    $headers = array(
      'Subject' => $component->subject,
      'From' => "\"$domainEmailName\" <do-not-reply@$emailDomain>",
      'To' => $eq->email,
      'Reply-To' => "do-not-reply@$emailDomain",
      'Return-Path' => "do-not-reply@$emailDomain",
    );
    CRM_Mailing_BAO_Mailing::addMessageIdHeader($headers, 'u', $job, $queue_id, $eq->hash);

    $b = CRM_Utils_Mail::setMimeParams($message);
    $h = $message->headers($headers);

    $mailer = \Civi::service('pear_mail');

    if (is_object($mailer)) {
      $errorScope = CRM_Core_TemporaryErrorScope::ignoreException();
      $mailer->send($eq->email, $h, $b);
      unset($errorScope);
    }
  }

  /**
   * Get row count for the event selector.
   *
   * @param int $mailing_id
   *   ID of the mailing.
   * @param int $job_id
   *   Optional ID of a job to filter on.
   * @param bool $is_distinct
   *   Group by queue ID?.
   *
   * @param string $org_unsubscribe
   *
   * @param string $toDate
   *
   * @return int
   *   Number of rows in result set
   */
  public static function getTotalCount(
    $mailing_id, $job_id = NULL,
    $is_distinct = FALSE, $org_unsubscribe = NULL, $toDate = NULL
  ) {
    $dao = new CRM_Core_DAO();

    $unsub = self::$_tableName;
    $queueObject = new CRM_Mailing_Event_BAO_Queue();
    $queue = $queueObject->getTableName();
    $mailingObject = new CRM_Mailing_BAO_Mailing();
    $mailing = $mailingObject->getTableName();
    $jobObject = new CRM_Mailing_BAO_MailingJob();
    $job = $jobObject->getTableName();

    $query = "
            SELECT      COUNT($unsub.id) as unsubs
            FROM        $unsub
            INNER JOIN  $queue
                    ON  $unsub.event_queue_id = $queue.id
            INNER JOIN  $job
                    ON  $queue.job_id = $job.id
            INNER JOIN  $mailing
                    ON  $job.mailing_id = $mailing.id
                    AND $job.is_test = 0
            WHERE       $mailing.id = " . CRM_Utils_Type::escape($mailing_id, 'Integer');

    if (!empty($toDate)) {
      $query .= " AND $unsub.time_stamp <= $toDate";
    }

    if (!empty($job_id)) {
      $query .= " AND $job.id = " . CRM_Utils_Type::escape($job_id, 'Integer');
    }

    if ($org_unsubscribe !== NULL) {
      $query .= " AND $unsub.org_unsubscribe = " . ($org_unsubscribe ? 0 : 1);
    }

    if ($is_distinct) {
      $query .= " GROUP BY $queue.id ";
    }

    $dao->query($query);
    $dao->fetch();
    if ($is_distinct) {
      return $dao->N;
    }
    else {
      return $dao->unsubs ? $dao->unsubs : 0;
    }
  }

  /**
   * Get rows for the event browser.
   *
   * @param int $mailing_id
   *   ID of the mailing.
   * @param int $job_id
   *   Optional ID of the job.
   * @param bool $is_distinct
   *   Group by queue id?.
   * @param int $offset
   *   Offset.
   * @param int $rowCount
   *   Number of rows.
   * @param array $sort
   *   Sort array.
   *
   * @param null $org_unsubscribe
   * @return array
   *   Result set
   */
  public static function &getRows(
    $mailing_id, $job_id = NULL,
    $is_distinct = FALSE, $offset = NULL, $rowCount = NULL, $sort = NULL,
    $org_unsubscribe = NULL
  ) {

    $dao = new CRM_Core_Dao();

    $unsub = self::$_tableName;
    $queueObject = new CRM_Mailing_Event_BAO_Queue();
    $queue = $queueObject->getTableName();
    $mailingObject = new CRM_Mailing_BAO_Mailing();
    $mailing = $mailingObject->getTableName();
    $jobObject = new CRM_Mailing_BAO_MailingJob();
    $job = $jobObject->getTableName();
    $contactObject = new CRM_Contact_BAO_Contact();
    $contact = $contactObject->getTableName();
    $emailObject = new CRM_Core_BAO_Email();
    $email = $emailObject->getTableName();

    $query = "
            SELECT      $contact.display_name as display_name,
                        $contact.id as contact_id,
                        $email.email as email,
                        $unsub.time_stamp as date,
                        $unsub.org_unsubscribe as org_unsubscribe
            FROM        $contact
            INNER JOIN  $queue
                    ON  $queue.contact_id = $contact.id
            INNER JOIN  $email
                    ON  $queue.email_id = $email.id
            INNER JOIN  $unsub
                    ON  $unsub.event_queue_id = $queue.id
            INNER JOIN  $job
                    ON  $queue.job_id = $job.id
            INNER JOIN  $mailing
                    ON  $job.mailing_id = $mailing.id
                    AND $job.is_test = 0
            WHERE       $mailing.id = " . CRM_Utils_Type::escape($mailing_id, 'Integer');

    if (!empty($job_id)) {
      $query .= " AND $job.id = " . CRM_Utils_Type::escape($job_id, 'Integer');
    }

    if ($org_unsubscribe !== NULL) {
      $query .= " AND $unsub.org_unsubscribe = " . ($org_unsubscribe ? 0 : 1);
    }

    if ($is_distinct) {
      $query .= " GROUP BY $queue.id, $unsub.time_stamp, $unsub.org_unsubscribe";
    }

    $orderBy = "sort_name ASC, {$unsub}.time_stamp DESC";
    if ($sort) {
      if (is_string($sort)) {
        $sort = CRM_Utils_Type::escape($sort, 'String');
        $orderBy = $sort;
      }
      else {
        $orderBy = trim($sort->orderBy());
      }
    }

    $query .= " ORDER BY {$orderBy} ";

    if ($offset || $rowCount) {
      //Added "||$rowCount" to avoid displaying all records on first page
      $query .= ' LIMIT ' . CRM_Utils_Type::escape($offset, 'Integer') . ', ' . CRM_Utils_Type::escape($rowCount, 'Integer');
    }

    $dao->query($query);

    $results = array();

    while ($dao->fetch()) {
      $url = CRM_Utils_System::url('civicrm/contact/view',
        "reset=1&cid={$dao->contact_id}"
      );
      $results[] = array(
        'name' => "<a href=\"$url\">{$dao->display_name}</a>",
        'email' => $dao->email,
        // Next value displays in selector under either Unsubscribe OR Optout column header, so always s/b Yes.
        'unsubOrOptout' => ts('Yes'),
        'date' => CRM_Utils_Date::customFormat($dao->date),
      );
    }
    return $results;
  }

  /**
   * @param int $queueID
   *
   * @return array
   */
  public static function getContactInfo($queueID) {
    $query = "
SELECT DISTINCT(civicrm_mailing_event_queue.contact_id) as contact_id,
       civicrm_contact.display_name as display_name
       civicrm_email.email as email
  FROM civicrm_mailing_event_queue,
       civicrm_contact,
       civicrm_email
 WHERE civicrm_mailing_event_queue.contact_id = civicrm_contact.id
   AND civicrm_mailing_event_queue.email_id = civicrm_email.id
   AND civicrm_mailing_event_queue.id = " . CRM_Utils_Type::escape($queueID, 'Integer');

    $dao = CRM_Core_DAO::executeQuery($query);

    $displayName = 'Unknown';
    $email = 'Unknown';
    if ($dao->fetch()) {
      $displayName = $dao->display_name;
      $email = $dao->email;
    }

    return array($displayName, $email);
  }

}