<?php

/*
+---------------------------------------------------------------------------+
| OpenX v2.8                                                                |
| ==========                                                                |
|                                                                           |
| Copyright (c) 2003-2009 OpenX Limited                                     |
| For contact details, see: http://www.openx.org/                           |
|                                                                           |
| This program is free software; you can redistribute it and/or modify      |
| it under the terms of the GNU General Public License as published by      |
| the Free Software Foundation; either version 2 of the License, or         |
| (at your option) any later version.                                       |
|                                                                           |
| This program 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 General Public License for more details.                              |
|                                                                           |
| You should have received a copy of the GNU General Public License         |
| along with this program; if not, write to the Free Software               |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA |
+---------------------------------------------------------------------------+
$Id: Campaigns.php 44711 2009-10-13 15:19:54Z matteo.beccati $
*/

require_once MAX_PATH . '/lib/max/Dal/Common.php';
require_once MAX_PATH . '/www/admin/lib-statistics.inc.php';
require_once MAX_PATH . '/lib/OA/Dal.php';
require_once MAX_PATH . '/lib/OA/Dll.php';

require_once LIB_PATH . '/OperationInterval.php';

require_once OX_PATH . '/lib/pear/Date.php';

/**
 * The Entity Service class for the "campaigns" table.
 *
 * @package    MaxDal
 * @author     Radek Maciaszek <radek.maciaszek@openx.org>
 */
class MAX_Dal_Admin_Campaigns extends MAX_Dal_Common
{
    var $table = 'campaigns';

	var $orderListName = array(
        'name' => 'campaignname',
        'id'   => array('clientid', 'campaignid'),
    );

    /**
     * Changes priority in campaigns belonging to a given agency.
     *
     * @param integer $agencyId
     * @param integer $priorityUpdateFrom
     * @param integer $priorityUpdateTo
     * @return array  Array of campaigns which priority was changed
     */
    function updateCampaignsPriorityByAgency($agencyId, $priorityUpdateFrom, $priorityUpdateTo)
    {
        $aUpdatedCampaigns = array();
        $aCampaigns = $this->getAllCampaignsUnderAgency($agencyId, 'name', 'up');
        foreach ($aCampaigns as $campaignId => $aCampaign) {
            $aCampaign['status_changed'] = false;
            if ($aCampaign['priority'] != $priorityUpdateFrom
                || $aCampaign['priority'] == $priorityUpdateTo)
            {
                continue;
            }
            $doCampaigns = OA_Dal::staticGetDO('campaigns', $campaignId);
            if ($doCampaigns) {
                $oldStatus = $doCampaigns->status;
                $doCampaigns->priority = $priorityUpdateTo;
                $doCampaigns->update();
                $aCampaign['status_changed'] = ($doCampaigns->status != $oldStatus);
                $aCampaign['status'] = $doCampaigns->status;
                $aUpdatedCampaigns[$campaignId] = $aCampaign;
                $doCampaigns->free();
            }
        }
        return $aUpdatedCampaigns;
    }

    /**
     * Sets ecpm_enabled in campaigns belonging to a given agency.
     *
     * @param integer $agencyId
     * @return array  Array of campaigns which ecpm_enabled was changed
     */
    function updateEcpmEnabledByAgency($agencyId)
    {
        $aUpdatedCampaigns = array();
        $aCampaigns = $this->getAllCampaignsUnderAgency($agencyId, 'name', 'up');
        foreach ($aCampaigns as $campaignId => $aCampaign) {
            $aCampaign['status_changed'] = false;
            $doCampaigns = OA_Dal::staticGetDO('campaigns', $campaignId);
            if ($doCampaigns) {
                $oldStatus = $doCampaigns->status;
                $doCampaigns->setEcpmEnabled();
                $doCampaigns->update();
                $aCampaign['status_changed'] = ($doCampaigns->status != $oldStatus);
                $aCampaign['status'] = $doCampaigns->status;
                $aUpdatedCampaigns[$campaignId] = $aCampaign;
                $doCampaigns->free();
            }
        }
        return $aUpdatedCampaigns;
    }

    /**
     * A method to determine if a campaign is targeted - that is, if the
     * campaign as any child ads that have delivery limitations.
     *
     * @param integer $campaignId The campaign ID.
     * @return boolean True if the campaign is targeted, false otherwise.
     */
    function isTargeted($campaignId)
    {
        $doBanners = OA_Dal::factoryDO('banners');
        $doBanners->campaignid = $campaignId;
        $doBanners->whereAdd("compiledlimitation NOT IN ('', 'true')");
        $doBanners->find();
        if ($doBanners->getRowCount() > 0) {
            // There are banners in the campaign with delivery limitations
            return true;
        }
        return false;
    }

    /**
     * A method to determine the lifetime ad impressions left before expiration.
     *
     * @param integer    $campaignId The campaign ID.
     * @param PEAR::Date $oDate      An optional date. If present, sets an upper
     *                               date boundary of the end of the operation
     *                               interval the date is in to limit the delivery
     *                               statistics used in determining how many
     *                               impressions have delivered. Can be used to
     *                               determine the the lifetime ad impressions left
     *                               before expiration at a previous time.
     * @return mixed The number of ad impressions remaining, or the
     *               string "unlimited".
     */
    function getAdImpressionsLeft($campaignId, $oDate = null)
    {
        global $strUnlimited;
        $prefix = $this->getTablePrefix();

        // Get the campaign info
        $doCampaigns = OA_Dal::factoryDO('campaigns');
        $doCampaigns->selectAdd("views AS impressions");
        $doCampaigns->get($campaignId);
        $aData = $doCampaigns->toArray();
        if ($aData['impressions'] > 0) {
            // Get the campaign delivery info
            if (!is_null($oDate)) {
                // Get the end of operation interval the date represents
                $aDates = OX_OperationInterval::convertDateToOperationIntervalStartAndEndDates($oDate);
                $oDate = $aDates['end'];
            }
            $dalDataIntermediateAd = OA_Dal::factoryDAL('data_intermediate_ad');
            $record = $dalDataIntermediateAd->getDeliveredByCampaign($campaignId, $oDate);
            $aDeliveryData = $record->toArray();
            return $aData['impressions'] - $aDeliveryData['impressions_delivered'];
        } else {
            return $strUnlimited;
        }
    }

    /**
     * A method to determine the lifetime ad clicks left before expiration.
     *
     * @param integer    $campaignId The campaign ID.
     * @param PEAR::Date $oDate      An optional date. If present, sets an upper
     *                               date boundary of the end of the operation
     *                               interval the date is in to limit the delivery
     *                               statistics used in determining how many
     *                               clicks have delivered. Can be used to
     *                               determine the the lifetime ad clicks left
     *                               before expiration at a previous time.
     * @return mixed The number of ad clicks remaining, or the
     *               string "unlimited".
     */
    function getAdClicksLeft($campaignId, $oDate = null)
    {
        global $strUnlimited;
        $prefix = $this->getTablePrefix();

        // Get the campaign info
        $doCampaigns = OA_Dal::factoryDO('campaigns');
        $doCampaigns->get($campaignId);
        $aData = $doCampaigns->toArray();
        if ($aData['clicks'] > 0) {
            // Get the campaign delivery info
            if (!is_null($oDate)) {
                // Get the end of operation interval the date represents
                $aDates = OX_OperationInterval::convertDateToOperationIntervalStartAndEndDates($oDate);
                $oDate = $aDates['end'];
            }
            $dalDataIntermediateAd = OA_Dal::factoryDAL('data_intermediate_ad');
            $record = $dalDataIntermediateAd->getDeliveredByCampaign($campaignId, $oDate);
            $aDeliveryData = $record->toArray();
            return $aData['clicks'] - $aDeliveryData['clicks_delivered'];
        } else {
            return $strUnlimited;
        }
    }

    /**
     * A method to determine the lifetime ad conversions left before expiration.
     *
     * @param integer    $campaignId The campaign ID.
     * @param PEAR::Date $oDate      An optional date. If present, sets an upper
     *                               date boundary of the end of the operation
     *                               interval the date is in to limit the delivery
     *                               statistics used in determining how many
     *                               conversions have delivered. Can be used to
     *                               determine the the lifetime ad conversions left
     *                               before expiration at a previous time.
     * @return mixed The number of ad conversions remaining, or the
     *               string "unlimited".
     */
    function getAdConversionsLeft($campaignId, $oDate = null)
    {
        global $strUnlimited;
        $prefix = $this->getTablePrefix();

        // Get the campaign info
        $doCampaigns = OA_Dal::factoryDO('campaigns');
        $doCampaigns->get($campaignId);
        $aData = $doCampaigns->toArray();
        if ($aData['clicks'] > 0) {
            // Get the campaign delivery info
            if (!is_null($oDate)) {
                // Get the end of operation interval the date represents
                $aDates = OX_OperationInterval::convertDateToOperationIntervalStartAndEndDates($oDate);
                $oDate = $aDates['end'];
            }
            $dalDataIntermediateAd = OA_Dal::factoryDAL('data_intermediate_ad');
            $record = $dalDataIntermediateAd->getDeliveredByCampaign($campaignId, $oDate);
            $aDeliveryData = $record->toArray();
            return $aData['conversions'] - $aDeliveryData['conversions_delivered'];
        } else {
            return $strUnlimited;
        }
    }

    /**
     * A method to determine how long it will be until a campaign "expires".
     *
     * Returns the earliest possible date from the following values:
     *  - The campaign's expiration date, if set.
     *  - The eStimated expiration date based on lifetime impression delivery
     *    rate, if applicable.
     *  - The eStimated expiration date based on lifetime click delivery rate
     *    if applicable.
     *  - The eStimated expiration date based on lifetime conversion rate,
     *    if applicable.
     *
     * Usage:
     *   $desc = $dalCampaigns->getDaysLeftString($campaignid);
     *
     * Where:
     *   $desc is a string to display giving how the expiration was calculated
     *     eg. "Estimated expiration", or that there is no expiration date
     *
     * @param integer $campaignId The campaign ID.
     * @return string
     */
    function getDaysLeftString($campaignId)
    {
        global $date_format, $strNoExpiration, $strDaysLeft, $strEstimated,
               $strExpirationDate, $strNoExpirationEstimation, $strDaysAgo,
               $strCampaignStop;

        $prefix = $this->getTablePrefix();

        // Define array to store possible expiration date results
        $aExpiration = array();

        // Get the campaign target info
        $now = OA::getNow('Y-m-d');
        $doCampaigns = OA_Dal::factoryDO('campaigns');
        $doCampaigns->selectAdd("views AS impressions");
        $doCampaigns->get($campaignId);
        $aCampaignData = $doCampaigns->toArray();

        if (!empty($aCampaignData['expire_time'])) {
            $oNow = new Date($now);
            $oNow->setHour(0);
            $oNow->setMinute(0);
            $oNow->setSecond(0);

            $oDate = new Date($aCampaignData['expire_time']);
            $oDate->setTZbyID('UTC');
            $oDate->convertTZ($oNow->tz);
            $oDate->setHour(0);
            $oDate->setMinute(0);
            $oDate->setSecond(0);

            $oSpan = new Date_Span();
            $oSpan->setFromDateDiff($oNow, $oDate);

            $aCampaignData['expire_f']  = $oDate->format($date_format);
            $aCampaignData['days_left'] = $oSpan->toDays() * ($oDate->before($oNow) ? -1 : 1);
        }

        $oDbh = OA_DB::singleton();
        $tableB = $oDbh->quoteIdentifier($prefix.'banners',true);
        $tableD = $oDbh->quoteIdentifier($prefix.'data_intermediate_ad',true);

        // Define array to return the expiration dates (if they exist)
        $aReturn = array(
                         'estimatedExpiration' => '',
                         'campaignExpiration' => ''
                         );

        // Does the campaign have lifetime impression targets?
        // If yes, try to get a stimated expiration date
        if ($aCampaignData['impressions'] > 0) {
        	$query = "
        	    SELECT
        	        SUM(dia.impressions) AS delivered,
        	        DATE_FORMAT(MIN(dia.date_time), '%Y-%m-%d') AS day_of_first
        	    FROM
        	        {$tableD} AS dia,
        	        {$tableB} AS b
        	    WHERE
        	        dia.ad_id = b.bannerid
        	        AND
        	        b.campaignid = ". DBC::makeLiteral($campaignId);
        	$rsImpressions = DBC::FindRecord($query);
        	if ($rsImpressions) {
        		$aImpressions = $rsImpressions->toArray();
        		// Get the number of days until the campaign will end
        		// based on the impression target delivery data
        		$aExpiration = $this->_calculateRemainingDays($aImpressions, $aCampaignData['impressions']);
        	}
        }
        // Does the campaign have lifetime click targets?
        // If yes, try to get a stimated expiration date
        elseif ($aCampaignData['clicks'] > 0) {
        	$query = "
        	    SELECT
        	        SUM(dia.clicks) AS delivered,
        	        DATE_FORMAT(MIN(dia.date_time), '%Y-%m-%d') AS day_of_first
        	    FROM
        	        {$tableD} AS dia,
        	        {$tableB} AS b
        	    WHERE
        	        dia.ad_id = b.bannerid
        	        AND
        	        b.campaignid = ". DBC::makeLiteral($campaignId);
        	$rsClicks = DBC::FindRecord($query);
        	if ($rsClicks) {
        		$aClicks = $rsClicks->toArray();
        		// Get the number of days until the campaign will end
        		// based on the click target delivery data
        		$aExpiration = $this->_calculateRemainingDays($aClicks, $aCampaignData['clicks']);
        	}
        }
        // Does the campaign have lifetime conversion targets?
        // If yes, try to get a stimated expiration date
        elseif ($aCampaignData['conversions'] > 0) {
        	$query = "
        	    SELECT
        	        SUM(dia.conversions) AS delivered,
        	        DATE_FORMAT(MIN(dia.date_time), '%Y-%m-%d') AS day_of_first
        	    FROM
        	        {$tableD} AS dia,
        	        {$tableB} AS b
        	    WHERE
        	        dia.ad_id = b.bannerid
        	        AND
        	        b.campaignid = ". DBC::makeLiteral($campaignId);
        	$rsConversions = DBC::FindRecord($query);
        	if ($rsConversions) {
        		$aConversions = $rsConversions->toArray();
        		// Get the number of days until the campaign will end
        		// based on the conversion target delivery data
        		$aExpiration = $this->_calculateRemainingDays($aConversions, $aCampaignData['conversions']);
        	}
        }

        // flags to control if the campaign expiration date and
        // the estimated expiration date are going to be showed
        $existExpirationDate = false;
        $showEtimatedDate = false;

        // is there a expiration date?
        if (!empty($aCampaignData['expire_time'])) {
        	$existExpirationDate = true;
        }

        if ($existExpirationDate) {
        	// has the expiration date been reached?
        	if ((int)$aCampaignData['days_left'] < 0) {
        		$aReturn['campaignExpiration'] = $strCampaignStop . ": " .
        		                                 $aCampaignData['expire_f'];
                $aReturn['campaignExpiration'] = $aReturn['campaignExpiration'] .
                                                 " (" . abs((int)round($aCampaignData['days_left'])) .
                                                 " $strDaysAgo)";
        	}else {
        	    $aReturn['campaignExpiration'] = $strExpirationDate . ": " .
        	                                     $aCampaignData['expire_f'];
                $aReturn['campaignExpiration'] = $aReturn['campaignExpiration'] .
                                                 " (" . $strDaysLeft . ": " .
                                                 round($aCampaignData['days_left']) . ")";
        	}
        } else {
        	$aReturn['campaignExpiration'] = $strNoExpiration;
        }

        // There is a estimated expiration date?
        // If yes, check if the campaign expiration date is set up and compare
        // both expiration dates to show only relevant estimated expiration dates
        if (!empty($aExpiration)) {
        	if ($existExpirationDate == true) {
        		if (round($aCampaignData['days_left']) >= 0) {
        			$campaignExpirationDate = new Date($aCampaignData['expire_time']);
        			$aExpiration['date']->hour = 0;
        			$aExpiration['date']->minute = 0;
        			$aExpiration['date']->second = 0;
        			$aExpiration['date']->partsecond = 0;
        			$compareDate = Date::compare($aExpiration['date'], $campaignExpirationDate);
        	        // the estimated expiration date is previous or equal to the
        	        // campaign expiration date and hasn't the expiration date been reached?
        	        if (($compareDate <= 0) && ((int)$aCampaignData['days_left'] >= 0)) {
        	    	    $showEtimatedDate = true;
        	        }
        		}
        	} else {
        		$showEtimatedDate = true;
        	}
        } elseif (($existExpirationDate && round($aCampaignData['days_left']) >= 0) ||
                  (!$existExpirationDate)) {
        	$aReturn['estimatedExpiration'] = $strEstimated . ": " .
        	                                  $strNoExpirationEstimation;
        }

        if ($showEtimatedDate) {
        	$aExpiration['daysLeft'] = phpAds_formatNumber($aExpiration['daysLeft']);
        	$aReturn['estimatedExpiration'] = $strEstimated  . ": " .
        	                                  $aExpiration['date_f'] . " (" .
        	                                  $strDaysLeft . ": " .
        	                                  $aExpiration['daysLeft'] . ")";
        }
        return $aReturn;
    }


/**
     * A private method to caclucate the number of days left until a
     * campaign expires based on the impression, click or conversion
     * delivery targets & the delivery rate of the campaign to date.
     *
     * @param array $aDeliveryData An array of two items. "delivered":
     *                             the number of impressions, clicks or
     *                             conversions delivered so far; and
     *                             "day_of_first": a string in YYYY-MM-DD
     *                             format representing the day that the
     *                             first impression, click or conversion
     *                             was delivered.
     * @param integer $target      The total number of impressions, clicks
     *                             or conversions required to be delivered
     *                             by the campaign.
     * @return array An array of three items. "daysLeft": the estimated
     *               number of days remaining until the campaign ends;
     *               "date": the estimated date of expiration; and "date_f"
     */
    function _calculateRemainingDays($aDeliveryData, $target)
    {
        global $date_format;
        $oNowDate = new Date();
        $aExpiration = array();
        // How many days since the first impression/click/conversion?
        if (!empty($aDeliveryData['day_of_first'])) {
            $oFirstDate = new Date($aDeliveryData['day_of_first']);
            $oSpan = new Date_Span();
            $oSpan->setFromDateDiff($oFirstDate, $oNowDate);
            $daysSinceFirst = ceil($oSpan->toDays());
        } else {
            $daysSinceFirst = 1;
        }
        // Have *any* impressions/clicks/conversions been delivered?
		if (!empty($aDeliveryData["delivered"]) && $aDeliveryData["delivered"] > 0) {
		    $targetRemaining = $target - $aDeliveryData["delivered"];
		    $deliveryRate = $aDeliveryData["delivered"] / $daysSinceFirst;
			$daysLeft = (int) round($targetRemaining / $deliveryRate);
		    $oSpan = new Date_Span();
		    $oSpan->setFromDays($daysLeft);
		    $oEstimatedEndDate = new Date();
            $oEstimatedEndDate->addSpan($oSpan);
            if ($oEstimatedEndDate->before($oNowDate)) {
                // Ooop! Wrapped into the past - get the biggest possible date
                $oEstimatedEndDate = new Date('1960-01-01 00:00:00');
                $oEstimatedEndDate->subtractSeconds(1);
            }
            $estimatedEndDateFormat = $oEstimatedEndDate->format($date_format);
        	$aExpiration = array(
        		'daysLeft' => $daysLeft,
        		'date_f'   => $estimatedEndDateFormat,
        		'date' => $oEstimatedEndDate
        	);
		}
		return $aExpiration;
    }

    /**
     * Gets campaign Id and name and client Id by keyword and agency Id
     * matched by keyword and either client name or client id.
     *
     * @param $keyword  string  Keyword to look for
     * @param $agencyId int  Agency Id
     *
     * @return RecordSet
     * @access public
     */
    function getCampaignAndClientByKeyword($keyword, $agencyId = null)
    {
        $whereCampaign = is_numeric($keyword) ? " OR m.campaignid=". DBC::makeLiteral($keyword) : '';
        $prefix = $this->getTablePrefix();
        $oDbh = OA_DB::singleton();
        $tableM = $oDbh->quoteIdentifier($prefix.'campaigns',true);
        $tableC = $oDbh->quoteIdentifier($prefix.'clients',true);

        $query = "
        SELECT
            m.campaignid AS campaignid,
            m.campaignname AS campaignname,
            m.clientid AS clientid
        FROM
            {$tableM} AS m,
            {$tableC} AS c
        WHERE
            (
            m.clientid=c.clientid
            AND (m.campaignname LIKE ".DBC::makeLiteral('%'.$keyword.'%')."
                $whereCampaign)
            )
        ";

        if($agencyId !== null) {
            $query .= " AND c.agencyid=".DBC::makeLiteral($agencyId);
        }

        return DBC::NewRecordSet($query);
    }

    /**
     * @todo Consider removing order options (or making them optional)
     */
    function getAllCampaigns($listorder, $orderdirection)
    {
        $prefix = $this->getTablePrefix();
        $oDbh = OA_DB::singleton();
        $tableM = $oDbh->quoteIdentifier($prefix.'campaigns',true);

        $query = "
            SELECT
                campaignid,
                clientid,
                campaignname,
                an_campaign_id,
                status,
                an_status,
                priority AS priority,
                revenue AS revenue
            FROM
                {$tableM} " .
            $this->getSqlListOrder($listorder, $orderdirection)
        ;

        $rsCampaigns = DBC::NewRecordSet($query);
        $aCampaigns = $rsCampaigns->getAll(array('campaignid', 'clientid', 'campaignname', 'an_campaign_id', 'status', 'an_status', 'priority', 'revenue'));
        $aCampaigns = $this->_rekeyCampaignsArray($aCampaigns);
        return $aCampaigns;
    }

    /**
     * @param int $agency_id
     * @return array    An array of arrays, representing a list of campaigns.
     *
     * @todo Consider removing order options (or making them optional)
     */
    function getAllCampaignsUnderAgency($agency_id, $listorder, $orderdirection)
    {
        $prefix = $this->getTablePrefix();
        $oDbh = OA_DB::singleton();
        $tableM = $oDbh->quoteIdentifier($prefix.'campaigns',true);
        $tableC = $oDbh->quoteIdentifier($prefix.'clients',true);

        $query = "
            SELECT
                m.campaignid as campaignid,
                m.clientid as clientid,
                m.campaignname as campaignname,
                m.status as status,
                m.an_status as an_status,
                m.priority AS priority,
                revenue AS revenue
            FROM
                {$tableM} AS m,
                {$tableC} AS c
            WHERE
                c.clientid=m.clientid
                AND c.agencyid=". DBC::makeLiteral($agency_id) .
            $this->getSqlListOrder($listorder, $orderdirection)
        ;

        $rsCampaigns = DBC::NewRecordSet($query);
        $aCampaigns = $rsCampaigns->getAll(array('campaignid', 'clientid', 'campaignname', 'status', 'an_status', 'priority', 'revenue'));
        $aCampaigns = $this->_rekeyCampaignsArray($aCampaigns);
        $aRetCampaigns = array();
        foreach ($aCampaigns as $campaignId => $aCampaign) {
            $aRetCampaigns[$campaignId]['status_changed'] = $aCampaign['status_changed'];
            $aRetCampaigns[$campaignId]['status'] = $aCampaign['status'];
            $aRetCampaigns[$campaignId]['clientid'] = $aCampaign['clientid'];
            $aRetCampaigns[$campaignId]['campaignname'] = $aCampaign['campaignname'];
            $aRetCampaigns[$campaignId]['priority'] = $aCampaign['priority'];
        }
        return $aRetCampaigns;
    }

    function countActiveCampaigns()
    {
        $conf = $GLOBALS['_MAX']['CONF'];
        $oDbh = OA_DB::singleton();
        $tableM = $oDbh->quoteIdentifier($this->getTablePrefix().'campaigns',true);

        $query_active_campaigns = "SELECT count(*) AS count".
            " FROM ".$tableM." WHERE status=".OA_ENTITY_STATUS_RUNNING;
        return $this->oDbh->queryOne($query_active_campaigns);
    }

    /**
     * @todo Verify that SQL is ANSI-compliant
     * @todo Consider reducing duplication with countCampaignsUnderAgency()
     * @todo Consider moving to Agency DAL
     */
    function countActiveCampaignsUnderAgency($agency_id)
    {
        $conf = $GLOBALS['_MAX']['CONF'];
        $oDbh = OA_DB::singleton();
        $tableM = $oDbh->quoteIdentifier($this->getTablePrefix().'campaigns',true);
        $tableC = $oDbh->quoteIdentifier($this->getTablePrefix().'clients',true);

        $query_active_campaigns = "SELECT count(*) AS count".
            " FROM ".$tableM." AS m".
            ",".$tableC." AS c".
            " WHERE m.clientid=c.clientid".
            " AND c.agencyid=". DBC::makeLiteral($agency_id) .
            " AND m.status=".OA_ENTITY_STATUS_RUNNING;
        return $this->oDbh->queryOne($query_active_campaigns);
    }

    /**
     * Converts a database result into an array keyed by campaign ID.
     * @param array $flat_campaign_data An flat array of campaign field arrays
     * @return array An array of arrays, representing a list of campaigns.
     */
    function _rekeyCampaignsArray($flat_campaign_data)
    {
        $campaigns = array();
        foreach ($flat_campaign_data as $row_campaign) {
            $campaigns[$row_campaign['campaignid']] = $row_campaign;
            $campaigns[$row_campaign['campaignid']]['expand'] = false;
            unset($campaigns[$row_campaign['campaignid']]['campaignid']);
        }
        return $campaigns;
    }

    /**
     * A method to locate all "email" type zones that are linked
     * to a given campaign, via the campaign's children banners
     * (as campaigns cannot be linked to email zones directly).
     *
     * @param integer $campaignId The ID of the campaign.
     * @return mixed An array of "email" type zone IDs found linked
     *               to the given campaign, an empry array if no
     *               such zones were found, or an MDB2_Error object
     *               on any kind of database error.
     */
    function getLinkedEmailZoneIds($campaignId)
    {
        // Test input
        if (!is_integer($campaignId) || $campaignId <= 0) {
            // Not a valid campaign ID, return no found zones
            $aResult = array();
            return $aResult;
        }
        // Prepare and execute query
        $prefix = $this->getTablePrefix();
        $sQuery = "
            SELECT
                {$prefix}zones.zoneid AS zone_id
            FROM
                {$prefix}banners,
                {$prefix}ad_zone_assoc,
                {$prefix}zones
            WHERE
                {$prefix}banners.campaignid = " . $this->oDbh->quote($campaignId, 'integer') . "
                AND
                {$prefix}banners.bannerid = {$prefix}ad_zone_assoc.ad_id
                AND
                {$prefix}ad_zone_assoc.zone_id = {$prefix}zones.zoneid
                AND
                {$prefix}zones.delivery = " . $this->oDbh->quote(MAX_ZoneEmail, 'integer') . "
            ORDER BY
                zone_id";
        OX::disableErrorHandling();
        $rsResult = $this->oDbh->query($sQuery);
        OX::enableErrorHandling();
        if (PEAR::isError($rsResult)) {
            return $rsResult;
        }
        $aResult = array();
        while ($aRow = $rsResult->fetchRow()) {
            $aResult[] = $aRow['zone_id'];
        }
        $rsResult->free();
        return $aResult;
    }

}

?>