<?php

class Application_Model_Schedule
{
    /**
     * Return TRUE if file is going to be played in the future.
     *
     * @param string $p_fileId
     */
    public static function IsFileScheduledInTheFuture($p_fileId)
    {
        $sql = <<<SQL
SELECT COUNT(*)
FROM cc_schedule
WHERE file_id = :file_id
  AND ends > NOW() AT TIME ZONE 'UTC'
SQL;
        $count = Application_Common_Database::prepareAndExecute( $sql, array(
            ':file_id'=>$p_fileId), 'column');
        return (is_numeric($count) && ($count != '0'));
    }

    public static function getAllFutureScheduledFiles($instanceId=null)
    {
        $sql = <<<SQL
SELECT distinct(file_id)
FROM cc_schedule
WHERE ends > now() AT TIME ZONE 'UTC'
AND file_id is not null
SQL;

        $files = Application_Common_Database::prepareAndExecute( $sql, array());

        $real_files = array();
        foreach ($files as $f) {
            $real_files[] = $f['file_id'];
        }

        return $real_files;
    }

    public static function getAllFutureScheduledWebstreams()
    {
        $sql = <<<SQL
SELECT distinct(stream_id)
FROM cc_schedule
WHERE ends > now() AT TIME ZONE 'UTC'
AND stream_id is not null
SQL;
        $streams = Application_Common_Database::prepareAndExecute( $sql, array());

        $real_streams = array();
        foreach ($streams as $s) {
            $real_streams[] = $s['stream_id'];
        }

        return $real_streams;
    }
    /**
     * Returns data related to the scheduled items.
     *
     * @param  int  $p_prev
     * @param  int  $p_next
     * @return date
     */
    public static function GetPlayOrderRange($p_prev = 1, $p_next = 1)
    {
        if (!is_int($p_prev) || !is_int($p_next)) {
            //must enter integers to specify ranges
            Logging::info("Invalid range parameters: $p_prev or $p_next");

            return array();
        }

        $date = new Application_Common_DateHelper;
        $timeNow = $date->getTimestamp();
        $utcTimeNow = $date->getUtcTimestamp();

        $shows = Application_Model_Show::getPrevCurrentNext($utcTimeNow);
        $previousShowID = count($shows['previousShow'])>0?$shows['previousShow'][0]['instance_id']:null;
        $currentShowID = count($shows['currentShow'])>0?$shows['currentShow'][0]['instance_id']:null;
        $nextShowID = count($shows['nextShow'])>0?$shows['nextShow'][0]['instance_id']:null;
        $results = self::GetPrevCurrentNext($previousShowID, $currentShowID, $nextShowID, $utcTimeNow);

        $range = array("env"=>APPLICATION_ENV,
            "schedulerTime"=>$timeNow,
            "previous"=>$results['previous'] !=null?$results['previous']:(count($shows['previousShow'])>0?$shows['previousShow'][0]:null),
            "current"=>$results['current'] !=null?$results['current']:((count($shows['currentShow'])>0 && $shows['currentShow'][0]['record'] == 1)?$shows['currentShow'][0]:null),
            "next"=> $results['next'] !=null?$results['next']:(count($shows['nextShow'])>0?$shows['nextShow'][0]:null),
            "currentShow"=>$shows['currentShow'],
            "nextShow"=>$shows['nextShow'],
            "timezone"=> date("T"),
            "timezoneOffset"=> date("Z")
        );

        return $range;
    }

    /**
     * Queries the database for the set of schedules one hour before
     * and after the given time. If a show starts and ends within that
     * time that is considered the current show. Then the scheduled item
     * before it is the previous show, and the scheduled item after it
     * is the next show. This way the dashboard getCurrentPlaylist is
     * very fast. But if any one of the three show types are not found
     * through this mechanism a call is made to the old way of querying
     * the database to find the track info.
    **/
    public static function GetPrevCurrentNext($p_previousShowID, $p_currentShowID, $p_nextShowID, $p_timeNow)
    {
        if ($p_previousShowID == null && $p_currentShowID == null && $p_nextShowID == null) {
            return;
        }

        $sql = "SELECT %%columns%% st.starts as starts, st.ends as ends,
            st.media_item_played as media_item_played, si.ends as show_ends
            %%tables%% WHERE ";

        $fileColumns = "ft.artist_name, ft.track_title, ";
        $fileJoin = "FROM cc_schedule st JOIN cc_files ft ON st.file_id = ft.id
            LEFT JOIN cc_show_instances si ON st.instance_id = si.id";

        $streamColumns = "ws.name AS artist_name, wm.liquidsoap_data AS track_title, ";
        $streamJoin = <<<SQL
FROM cc_schedule AS st
JOIN cc_webstream ws ON st.stream_id = ws.id
LEFT JOIN cc_show_instances AS si ON st.instance_id = si.id
LEFT JOIN cc_subjs AS sub ON sub.id = ws.creator_id
LEFT JOIN
  (SELECT *
   FROM cc_webstream_metadata
   ORDER BY start_time DESC LIMIT 1) AS wm ON st.id = wm.instance_id
SQL;

        $predicateArr = array();
        $paramMap = array();
        if (isset($p_previousShowID)) {
            $predicateArr[] = 'st.instance_id = :previousShowId';
            $paramMap[':previousShowId'] = $p_previousShowID;
        }
        if (isset($p_currentShowID)) {
            $predicateArr[] = 'st.instance_id = :currentShowId';
            $paramMap[':currentShowId'] = $p_currentShowID;
        }
        if (isset($p_nextShowID)) {
            $predicateArr[] = 'st.instance_id = :nextShowId';
            $paramMap[':nextShowId'] = $p_nextShowID;
        }

        $sql .= " (".implode(" OR ", $predicateArr).") ";
        $sql .= ' AND st.playout_status > 0 ORDER BY st.starts';

        $filesSql = str_replace("%%columns%%", $fileColumns, $sql);
        $filesSql = str_replace("%%tables%%", $fileJoin, $filesSql);

        $streamSql = str_replace("%%columns%%", $streamColumns, $sql);
        $streamSql = str_replace("%%tables%%", $streamJoin, $streamSql);

        $sql = "SELECT * FROM (($filesSql) UNION ($streamSql)) AS unioned ORDER BY starts";

        $rows = Application_Common_Database::prepareAndExecute($sql, $paramMap);
        $numberOfRows = count($rows);

        $results['previous'] = null;
        $results['current']  = null;
        $results['next']     = null;

        $timeNowAsMillis = strtotime($p_timeNow);
        for ($i = 0; $i < $numberOfRows; ++$i) {
            // if the show is overbooked, then update the track end time to the end of the show time.
            if ($rows[$i]['ends'] > $rows[$i]["show_ends"]) {
                $rows[$i]['ends'] = $rows[$i]["show_ends"];
            }

            if ((strtotime($rows[$i]['starts']) <= $timeNowAsMillis) && (strtotime($rows[$i]['ends']) >= $timeNowAsMillis)) {
                if ($i - 1 >= 0) {
                    $results['previous'] = array("name"=>$rows[$i-1]["artist_name"]." - ".$rows[$i-1]["track_title"],
                            "starts"=>$rows[$i-1]["starts"],
                            "ends"=>$rows[$i-1]["ends"],
                            "type"=>'track');
                }
                 $results['current'] =  array("name"=>$rows[$i]["artist_name"]." - ".$rows[$i]["track_title"],
                            "starts"=>$rows[$i]["starts"],
                            "ends"=> (($rows[$i]["ends"] > $rows[$i]["show_ends"]) ? $rows[$i]["show_ends"]: $rows[$i]["ends"]),
                            "media_item_played"=>$rows[$i]["media_item_played"],
                            "record"=>0,
                            "type"=>'track');
                if (isset($rows[$i+1])) {
                    $results['next'] =  array("name"=>$rows[$i+1]["artist_name"]." - ".$rows[$i+1]["track_title"],
                            "starts"=>$rows[$i+1]["starts"],
                            "ends"=>$rows[$i+1]["ends"],
                            "type"=>'track');
                }
                break;
            }
            if (strtotime($rows[$i]['ends']) < $timeNowAsMillis ) {
                $previousIndex = $i;
            }
            if (strtotime($rows[$i]['starts']) > $timeNowAsMillis) {
                $results['next'] = array("name"=>$rows[$i]["artist_name"]." - ".$rows[$i]["track_title"],
                            "starts"=>$rows[$i]["starts"],
                            "ends"=>$rows[$i]["ends"],
                            "type"=>'track');
                break;
            }
        }
        //If we didn't find a a current show because the time didn't fit we may still have
        //found a previous show so use it.
        if ($results['previous'] === null && isset($previousIndex)) {
                $results['previous'] = array("name"=>$rows[$previousIndex]["artist_name"]." - ".$rows[$previousIndex]["track_title"],
                            "starts"=>$rows[$previousIndex]["starts"],
                            "ends"=>$rows[$previousIndex]["ends"]);;
        }

        return $results;
    }

    public static function GetLastScheduleItem($p_timeNow)
    {
        $sql = <<<SQL
SELECT ft.artist_name,
       ft.track_title,
       st.starts AS starts,
       st.ends AS ends
FROM cc_schedule st
LEFT JOIN cc_files ft ON st.file_id = ft.id
LEFT JOIN cc_show_instances sit ON st.instance_id = sit.id
-- this and the next line are necessary since we can overbook shows.
WHERE st.ends < TIMESTAMP :timeNow

  AND st.starts >= sit.starts
  AND st.starts < sit.ends
ORDER BY st.ends DESC LIMIT 1;
SQL;
        $row = Application_Common_Database::prepareAndExecute($sql, array(':timeNow'=>$p_timeNow));

        return $row;
    }

    public static function GetCurrentScheduleItem($p_timeNow, $p_instanceId)
    {
        /* Note that usually there will be one result returned. In some
         * rare cases two songs are returned. This happens when a track
         * that was overbooked from a previous show appears as if it
         * hasnt ended yet (track end time hasn't been reached yet). For
         * this reason,  we need to get the track that starts later, as
         * this is the *real* track that is currently playing. So this
         * is why we are ordering by track start time. */
        $sql = "SELECT *"
        ." FROM cc_schedule st"
        ." LEFT JOIN cc_files ft"
        ." ON st.file_id = ft.id"
        ." WHERE st.starts <= TIMESTAMP :timeNow1"
        ." AND st.instance_id = :instanceId"
        ." AND st.ends > TIMESTAMP :timeNow2"
        ." ORDER BY st.starts DESC"
        ." LIMIT 1";

        $row = Application_Common_Database::prepareAndExecute($sql, array(':timeNow1'=>$p_timeNow, ':instanceId'=>$p_instanceId, ':timeNow2'=>$p_timeNow,));

        return $row;
    }

    public static function GetNextScheduleItem($p_timeNow)
    {
        $sql = "SELECT"
        ." ft.artist_name, ft.track_title,"
        ." st.starts as starts, st.ends as ends"
        ." FROM cc_schedule st"
        ." LEFT JOIN cc_files ft"
        ." ON st.file_id = ft.id"
        ." LEFT JOIN cc_show_instances sit"
        ." ON st.instance_id = sit.id"
        ." WHERE st.starts > TIMESTAMP :timeNow"
        ." AND st.starts >= sit.starts" //this and the next line are necessary since we can overbook shows.
        ." AND st.starts < sit.ends"
        ." ORDER BY st.starts"
        ." LIMIT 1";

        $row = Application_Common_Database::prepareAndExecute($sql, array(':timeNow'=>$p_timeNow));

        return $row;
    }

    /*
     *
     * @param DateTime $p_startDateTime
     *
     * @param DateTime $p_endDateTime
     *
     * @return array $scheduledItems
     *
     */
    public static function GetScheduleDetailItems($p_start, $p_end, $p_shows, $p_show_instances)
    {
        $p_start_str = $p_start->format("Y-m-d H:i:s");
        $p_end_str = $p_end->format("Y-m-d H:i:s");

        //We need to search 24 hours before and after the show times so that that we
        //capture all of the show's contents.
        $p_track_start= $p_start->sub(new DateInterval("PT24H"))->format("Y-m-d H:i:s");
        $p_track_end = $p_end->add(new DateInterval("PT24H"))->format("Y-m-d H:i:s");

        $templateSql = <<<SQL
SELECT DISTINCT sched.starts AS sched_starts,
                sched.ends AS sched_ends,
                sched.id AS sched_id,
                sched.cue_in AS cue_in,
                sched.cue_out AS cue_out,
                sched.fade_in AS fade_in,
                sched.fade_out AS fade_out,
                sched.playout_status AS playout_status,
                sched.instance_id AS sched_instance_id,

                %%columns%%
                FROM (%%join%%)
SQL;

        $filesColumns = <<<SQL
                ft.track_title AS file_track_title,
                ft.artist_name AS file_artist_name,
                ft.album_title AS file_album_title,
                ft.length AS file_length,
                ft.file_exists AS file_exists,
                ft.mime AS file_mime,
                ft.soundcloud_id AS soundcloud_id
SQL;
        $filesJoin = <<<SQL
       cc_schedule AS sched
       JOIN cc_files AS ft ON (sched.file_id = ft.id
           AND ((sched.starts >= :fj_ts_1
               AND sched.starts < :fj_ts_2)
               OR (sched.ends > :fj_ts_3
               AND sched.ends <= :fj_ts_4)
               OR (sched.starts <= :fj_ts_5
               AND sched.ends >= :fj_ts_6))
        )
SQL;
        $paramMap = array(
        	":fj_ts_1" => $p_track_start,
        	":fj_ts_2" => $p_track_end,
        	":fj_ts_3" => $p_track_start,
        	":fj_ts_4" => $p_track_end,
        	":fj_ts_5" => $p_track_start,
        	":fj_ts_6" => $p_track_end,
        );

        $filesSql = str_replace("%%columns%%",
            $filesColumns,
            $templateSql);
        $filesSql= str_replace("%%join%%",
            $filesJoin,
            $filesSql);

        $streamColumns = <<<SQL
                ws.name AS file_track_title,
                sub.login AS file_artist_name,
                ws.description AS file_album_title,
                ws.length AS file_length,
                't'::BOOL AS file_exists,
                ws.mime AS file_mime,
                (SELECT NULL::integer AS soundcloud_id)
SQL;
        $streamJoin = <<<SQL
      cc_schedule AS sched
      JOIN cc_webstream AS ws ON (sched.stream_id = ws.id
          AND ((sched.starts >= :sj_ts_1
               AND sched.starts < :sj_ts_2)
               OR (sched.ends > :sj_ts_3
               AND sched.ends <= :sj_ts_4)
               OR (sched.starts <= :sj_ts_5
               AND sched.ends >= :sj_ts_6))
      )
      LEFT JOIN cc_subjs AS sub ON (ws.creator_id = sub.id)
SQL;
        $map = array(
        	":sj_ts_1" => $p_track_start,
        	":sj_ts_2" => $p_track_end,
        	":sj_ts_3" => $p_track_start,
        	":sj_ts_4" => $p_track_end,
        	":sj_ts_5" => $p_track_start,
        	":sj_ts_6" => $p_track_end,
        );
        $paramMap = $paramMap + $map;

        $streamSql = str_replace("%%columns%%",
            $streamColumns,
            $templateSql);
        $streamSql = str_replace("%%join%%",
            $streamJoin,
            $streamSql);


        $showPredicate = "";
        if (count($p_shows) > 0) {

            $params = array();
            $map = array();

            for ($i = 0, $len = count($p_shows); $i < $len; $i++) {
            	$holder = ":show_".$i;

            	$params[] = $holder;
            	$map[$holder] = $p_shows[$i];
            }

            $showPredicate = " AND show_id IN (".implode(",", $params).")";
            $paramMap = $paramMap + $map;
        } else if (count($p_show_instances) > 0) {
            $showPredicate = " AND si.id IN (".implode(",", $p_show_instances).")";
        }

        $sql = <<<SQL
SELECT showt.name AS show_name,
       showt.color AS show_color,
       showt.background_color AS show_background_color,
       showt.id AS show_id,
       showt.linked AS linked,
       si.starts AS si_starts,
       si.ends AS si_ends,
       si.time_filled AS si_time_filled,
       si.record AS si_record,
       si.rebroadcast AS si_rebroadcast,
       si.instance_id AS parent_show,
       si.id AS si_id,
       si.last_scheduled AS si_last_scheduled,
       si.file_id AS si_file_id,
       *
       FROM (($filesSql) UNION ($streamSql)) as temp
       RIGHT JOIN cc_show_instances AS si ON (si.id = sched_instance_id)
JOIN cc_show AS showt ON (showt.id = si.show_id)
WHERE si.modified_instance = FALSE
  $showPredicate
  AND ((si.starts >= :ts_1
       AND si.starts < :ts_2)
  OR (si.ends > :ts_3
      AND si.ends <= :ts_4)
  OR (si.starts <= :ts_5
      AND si.ends >= :ts_6))
ORDER BY si_starts,
         sched_starts;
SQL;

        $map = array(
        	":ts_1" => $p_start_str,
        	":ts_2" => $p_end_str,
        	":ts_3" => $p_start_str,
        	":ts_4" => $p_end_str,
        	":ts_5" => $p_start_str,
        	":ts_6" => $p_end_str,
        );
        $paramMap = $paramMap + $map;

        $rows = Application_Common_Database::prepareAndExecute(
        	$sql,
        	$paramMap,
        	Application_Common_Database::ALL
        );

        return $rows;
    }

    public static function UpdateMediaPlayedStatus($p_id)
    {
        $sql = "UPDATE cc_schedule"
                ." SET media_item_played=TRUE";
        // we need to update 'broadcasted' column as well
        // check the current switch status
        $live_dj        = Application_Model_Preference::GetSourceSwitchStatus('live_dj')        == 'on';
        $master_dj      = Application_Model_Preference::GetSourceSwitchStatus('master_dj')      == 'on';
        $scheduled_play = Application_Model_Preference::GetSourceSwitchStatus('scheduled_play') == 'on';

        if (!$live_dj && !$master_dj && $scheduled_play) {
            $sql .= ", broadcasted=1";
        }

        $sql .= " WHERE id=:pid";
        $map = array(":pid" => $p_id);

        Application_Common_Database::prepareAndExecute($sql, $map,
            Application_Common_Database::EXECUTE);
    }

    public static function UpdateBrodcastedStatus($dateTime, $value)
    {
        $now = $dateTime->format("Y-m-d H:i:s");

        $sql = <<<SQL
UPDATE cc_schedule
SET broadcasted=:broadcastedValue
WHERE starts <= :starts::TIMESTAMP
  AND ends >= :ends::TIMESTAMP
SQL;

        $retVal = Application_Common_Database::prepareAndExecute($sql, array(
            ':broadcastedValue' => $value,
            ':starts' => $now,
            ':ends' => $now), 'execute');
        return $retVal;
    }

    public static function getSchduledPlaylistCount()
    {
        $sql = "SELECT count(*) as cnt FROM cc_schedule";

        $res = Application_Common_Database::prepareAndExecute($sql, array(),
        		Application_Common_Database::COLUMN);

        return $res;
    }

    /**
     * Convert a time string in the format "YYYY-MM-DD HH:mm:SS"
     * to "YYYY-MM-DD-HH-mm-SS".
     *
     * @param  string $p_time
     * @return string
     */
    private static function AirtimeTimeToPypoTime($p_time)
    {
        $p_time = substr($p_time, 0, 19);
        $p_time = str_replace(" ", "-", $p_time);
        $p_time = str_replace(":", "-", $p_time);

        return $p_time;
    }

    /**
     * Convert a time string in the format "YYYY-MM-DD-HH-mm-SS" to
     * "YYYY-MM-DD HH:mm:SS".
     *
     * @param  string $p_time
     * @return string
     */
    private static function PypoTimeToAirtimeTime($p_time)
    {
        $t = explode("-", $p_time);

        return $t[0]."-".$t[1]."-".$t[2]." ".$t[3].":".$t[4].":00";
    }

    /**
     * Return true if the input string is in the format YYYY-MM-DD-HH-mm
     *
     * @param  string  $p_time
     * @return boolean
     */
    public static function ValidPypoTimeFormat($p_time)
    {
        $t = explode("-", $p_time);
        if (count($t) != 5) {
            return false;
        }
        foreach ($t as $part) {
            if (!is_numeric($part)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Converts a time value as a string (with format HH:MM:SS.mmmmmm) to
     * millisecs.
     *
     * @param  string $p_time
     * @return int
     */
    public static function WallTimeToMillisecs($p_time)
    {
        $t = explode(":", $p_time);
        $millisecs = 0;
        if (strpos($t[2], ".")) {
            $secParts = explode(".", $t[2]);
            $millisecs = $secParts[1];
            $millisecs = str_pad(substr($millisecs, 0, 3),3, '0');
            $millisecs = intval($millisecs);
            $seconds = intval($secParts[0]);
        } else {
            $seconds = intval($t[2]);
        }
        $ret = $millisecs + ($seconds * 1000) + ($t[1] * 60 * 1000) + ($t[0] * 60 * 60 * 1000);

        return $ret;
    }

    /**
     * Compute the difference between two times in the format          .
     * "HH:MM:SS.mmmmmm" Note: currently only supports calculating     .
     * millisec differences                                            .
     *
     * @param  string $p_time1
     * @param  string $p_time2
     * @return double
     */
    private static function TimeDiff($p_time1, $p_time2)
    {
        $parts1 = explode(".", $p_time1);
        $parts2 = explode(".", $p_time2);
        $diff = 0;
        if ( (count($parts1) > 1) && (count($parts2) > 1) ) {
            $millisec1 = substr($parts1[1], 0, 3);
            $millisec1 = str_pad($millisec1, 3, "0");
            $millisec1 = intval($millisec1);
            $millisec2 = substr($parts2[1], 0, 3);
            $millisec2 = str_pad($millisec2, 3, "0");
            $millisec2 = intval($millisec2);
            $diff = abs($millisec1 - $millisec2)/1000;
        }

        return $diff;
    }

    /**
     * Returns an array of schedule items from cc_schedule table. Tries
     * to return at least 3 items (if they are available). The parameters
     * $p_startTime and $p_endTime specify the range. Schedule items returned
     * do not have to be entirely within this range. It is enough that the end
     * or beginning of the scheduled item is in the range.
     *
     *
     * @param string $p_startTime
     *    In the format YYYY-MM-DD HH:MM:SS.nnnnnn
     * @param string $p_endTime
     *    In the format YYYY-MM-DD HH:MM:SS.nnnnnn
     * @return array
     *    Returns null if nothing found, else an array of associative
     *    arrays representing each row.
     */
    public static function getItems($p_startTime, $p_endTime)
    {
        $baseQuery = <<<SQL
SELECT st.file_id     AS file_id,
       st.id          AS id,
       st.instance_id AS instance_id,
       st.starts      AS start,
       st.ends        AS end,
       st.cue_in      AS cue_in,
       st.cue_out     AS cue_out,
       st.fade_in     AS fade_in,
       st.fade_out    AS fade_out,
       si.starts      AS show_start,
       si.ends        AS show_end,
       s.name         AS show_name,
       f.id           AS file_id,
       f.replay_gain  AS replay_gain,
       ws.id          AS stream_id,
       ws.url         AS url
FROM cc_schedule AS st
LEFT JOIN cc_show_instances AS si ON st.instance_id = si.id
LEFT JOIN cc_show           AS s  ON s.id = si.show_id
LEFT JOIN cc_files          AS f  ON st.file_id = f.id
LEFT JOIN cc_webstream      AS ws ON st.stream_id = ws.id
SQL;
        $predicates = <<<SQL
WHERE st.ends > :startTime1
  AND st.starts < :endTime
  AND st.playout_status > 0
  AND si.ends > :startTime2
  AND si.modified_instance = 'f'
ORDER BY st.starts
SQL;

        $sql = $baseQuery." ".$predicates;

        $rows = Application_Common_Database::prepareAndExecute($sql, array(
            ':startTime1' => $p_startTime,
            ':endTime'    => $p_endTime,
            ':startTime2' => $p_startTime));

        if (count($rows) < 3) {
            $dt = new DateTime("@".time());
            $dt->add(new DateInterval("PT24H"));
            $range_end = $dt->format("Y-m-d H:i:s");

            $predicates = <<<SQL
WHERE st.ends > :startTime1
  AND st.starts < :rangeEnd
  AND st.playout_status > 0
  AND si.ends > :startTime2
  AND si.modified_instance = 'f'
ORDER BY st.starts LIMIT 3
SQL;

            $sql = $baseQuery." ".$predicates." ";
            $rows = Application_Common_Database::prepareAndExecute($sql,
                array(
                    ':startTime1' => $p_startTime,
                    ':rangeEnd'   => $range_end,
                    ':startTime2' => $p_startTime));
        }

        return $rows;
    }

    /**
     * This function will ensure that an existing index in the
     * associative array is never overwritten, instead appending
     * _0, _1, _2, ... to the end of the key to make sure it is unique
     */
    private static function appendScheduleItem(&$data, $time, $item)
    {
        $key = $time;
        $i = 0;

        while (array_key_exists($key, $data["media"])) {
            $key = "{$time}_{$i}";
            $i++;
        }

        $data["media"][$key] = $item;
    }

    private static function createInputHarborKickTimes(&$data, $range_start, $range_end)
    {
        $utcTimeZone = new DateTimeZone("UTC");
        $kick_times = Application_Model_ShowInstance::GetEndTimeOfNextShowWithLiveDJ($range_start, $range_end);
        foreach ($kick_times as $kick_time_info) {
            $kick_time = $kick_time_info['ends'];
            $temp = explode('.', Application_Model_Preference::GetDefaultTransitionFade());
            // we round down transition time since PHP cannot handle millisecond. We need to
            // handle this better in the future
            $transition_time   = intval($temp[0]);
            $switchOffDataTime = new DateTime($kick_time, $utcTimeZone);
            $switch_off_time   = $switchOffDataTime->sub(new DateInterval('PT'.$transition_time.'S'));
            $switch_off_time   = $switch_off_time->format("Y-m-d H:i:s");

            $kick_start = self::AirtimeTimeToPypoTime($kick_time);
            $data["media"][$kick_start]['start']             = $kick_start;
            $data["media"][$kick_start]['end']               = $kick_start;
            $data["media"][$kick_start]['event_type']        = "kick_out";
            $data["media"][$kick_start]['type']              = "event";
            $data["media"][$kick_start]['independent_event'] = true;

            if ($kick_time !== $switch_off_time) {
                $switch_start = self::AirtimeTimeToPypoTime($switch_off_time);
                $data["media"][$switch_start]['start']             = $switch_start;
                $data["media"][$switch_start]['end']               = $switch_start;
                $data["media"][$switch_start]['event_type']        = "switch_off";
                $data["media"][$switch_start]['type']                = "event";
                $data["media"][$switch_start]['independent_event'] = true;
            }
        }
    }

    private static function createFileScheduleEvent(&$data, $item, $media_id, $uri)
    {
        $start = self::AirtimeTimeToPypoTime($item["start"]);
        $end   = self::AirtimeTimeToPypoTime($item["end"]);

        list(,,,$start_hour,,) = explode("-", $start);
        list(,,,$end_hour,,) = explode("-", $end);

        $same_hour = $start_hour == $end_hour;
        $independent_event = !$same_hour;

        $replay_gain = is_null($item["replay_gain"]) ? "0": $item["replay_gain"];
        $replay_gain += Application_Model_Preference::getReplayGainModifier();

        if ( !Application_Model_Preference::GetEnableReplayGain() ) {
            $replay_gain = 0;
        }

        $schedule_item = array(
            'id'                => $media_id,
            'type'              => 'file',
            'row_id'            => $item["id"],
            'uri'               => $uri,
            'fade_in'           => Application_Model_Schedule::WallTimeToMillisecs($item["fade_in"]),
            'fade_out'          => Application_Model_Schedule::WallTimeToMillisecs($item["fade_out"]),
            'cue_in'            => Application_Common_DateHelper::CalculateLengthInSeconds($item["cue_in"]),
            'cue_out'           => Application_Common_DateHelper::CalculateLengthInSeconds($item["cue_out"]),
            'start'             => $start,
            'end'               => $end,
            'show_name'         => $item["show_name"],
            'replay_gain'       => $replay_gain,
            'independent_event' => $independent_event,
        );

        if ($schedule_item['cue_in'] > $schedule_item['cue_out']) {
            $schedule_item['cue_in'] = $schedule_item['cue_out'];
        }
        self::appendScheduleItem($data, $start, $schedule_item);
    }

    private static function createStreamScheduleEvent(&$data, $item, $media_id, $uri)
    {
        $start = self::AirtimeTimeToPypoTime($item["start"]);
        $end   = self::AirtimeTimeToPypoTime($item["end"]);

        //create an event to start stream buffering 5 seconds ahead of the streams actual time.
        $buffer_start = new DateTime($item["start"], new DateTimeZone('UTC'));
        $buffer_start->sub(new DateInterval("PT5S"));

        $stream_buffer_start = self::AirtimeTimeToPypoTime($buffer_start->format("Y-m-d H:i:s"));

        $schedule_item = array(
            'start'             => $stream_buffer_start,
            'end'               => $stream_buffer_start,
            'uri'               => $uri,
            'row_id'            => $item["id"],
            'type'              => 'stream_buffer_start',
            'independent_event' => true
        );

        self::appendScheduleItem($data, $start, $schedule_item);

        $schedule_item = array(
            'id'                => $media_id,
            'type'              => 'stream_output_start',
            'row_id'            => $item["id"],
            'uri'               => $uri,
            'start'             => $start,
            'end'               => $end,
            'show_name'         => $item["show_name"],
            'independent_event' => true
        );
        self::appendScheduleItem($data, $start, $schedule_item);

        //since a stream never ends we have to insert an additional "kick stream" event. The "start"
        //time of this event is the "end" time of the stream minus 1 second.
        $dt = new DateTime($item["end"], new DateTimeZone('UTC'));
        $dt->sub(new DateInterval("PT1S"));

        $stream_end = self::AirtimeTimeToPypoTime($dt->format("Y-m-d H:i:s"));

        $schedule_item = array(
            'start'             => $stream_end,
            'end'               => $stream_end,
            'uri'               => $uri,
            'type'              => 'stream_buffer_end',
            'row_id'            => $item["id"],
            'independent_event' => true
        );
        self::appendScheduleItem($data, $stream_end, $schedule_item);

        $schedule_item = array(
            'start'             => $stream_end,
            'end'               => $stream_end,
            'uri'               => $uri,
            'type'              => 'stream_output_end',
            'independent_event' => true
        );
        self::appendScheduleItem($data, $stream_end, $schedule_item);
    }

    private static function getRangeStartAndEnd($p_fromDateTime, $p_toDateTime)
    {
        $CC_CONFIG = Config::getConfig();

        /* if $p_fromDateTime and $p_toDateTime function parameters are null,
            then set range * from "now" to "now + 24 hours". */
        if (is_null($p_fromDateTime)) {
            $t1 = new DateTime("@".time());
            $range_start = $t1->format("Y-m-d H:i:s");
        } else {
            $range_start = Application_Model_Schedule::PypoTimeToAirtimeTime($p_fromDateTime);
        }
        if (is_null($p_fromDateTime)) {
            $t2 = new DateTime("@".time());

            $cache_ahead_hours = $CC_CONFIG["cache_ahead_hours"];

            if (is_numeric($cache_ahead_hours)) {
                //make sure we are not dealing with a float
                $cache_ahead_hours = intval($cache_ahead_hours);
            } else {
                $cache_ahead_hours = 1;
            }

            $t2->add(new DateInterval("PT".$cache_ahead_hours."H"));
            $range_end = $t2->format("Y-m-d H:i:s");
        } else {
            $range_end = Application_Model_Schedule::PypoTimeToAirtimeTime($p_toDateTime);
        }

        return array($range_start, $range_end);
    }


    private static function createScheduledEvents(&$data, $range_start, $range_end)
    {
        $utcTimeZone = new DateTimeZone("UTC");
        $items = self::getItems($range_start, $range_end);

        foreach ($items as $item) {
            $showEndDateTime = new DateTime($item["show_end"], $utcTimeZone);

            $trackStartDateTime = new DateTime($item["start"], $utcTimeZone);
            $trackEndDateTime = new DateTime($item["end"], $utcTimeZone);

            if ($trackStartDateTime->getTimestamp() > $showEndDateTime->getTimestamp()) {
                //do not send any tracks that start past their show's end time
                continue;
            }

            if ($trackEndDateTime->getTimestamp() > $showEndDateTime->getTimestamp()) {
                $di = $trackStartDateTime->diff($showEndDateTime);

                $item["cue_out"] = $di->format("%H:%i:%s").".000";
                $item["end"] = $showEndDateTime->format("Y-m-d H:i:s");
            }

            if (!is_null($item['file_id'])) {
                //row is from "file"
                $media_id = $item['file_id'];
                $storedFile = Application_Model_StoredFile::RecallById($media_id);
                $uri = $storedFile->getFilePath();
                self::createFileScheduleEvent($data, $item, $media_id, $uri);
            } 
            elseif (!is_null($item['stream_id'])) {
                //row is type "webstream"
                $media_id = $item['stream_id'];
                $uri = $item['url'];
                self::createStreamScheduleEvent($data, $item, $media_id, $uri);
            } 
            else {
                throw new Exception("Unknown schedule type: ".print_r($item, true));
            }

        }
    }

    /* Check if two events are less than or equal to 1 second apart
     */
    public static function areEventsLinked($event1, $event2) {
        $dt1 = DateTime::createFromFormat("Y-m-d-H-i-s", $event1['start']);
        $dt2 = DateTime::createFromFormat("Y-m-d-H-i-s", $event2['start']);

        $seconds = $dt2->getTimestamp() - $dt1->getTimestamp();
        return $seconds <= 1;
    }

    /**
     * Streams are a 4 stage process.
     * 1) start buffering stream 5 seconds ahead of its start time
     * 2) at the start time tell liquidsoap to switch to this source
     * 3) at the end time, tell liquidsoap to stop reading this stream
     * 4) at the end time, tell liquidsoap to switch away from input.http source.
     *
     * When we have two streams back-to-back, some of these steps are unnecessary
     * for the second stream. Instead of sending commands 1,2,3,4,1,2,3,4 we should
     * send 1,2,1,2,3,4 - We don't need to tell liquidsoap to stop reading (#3), because #1
     * of the next stream implies this when we pass in a new url. We also don't need #4.
     *
     * There's a special case here is well. When the back-to-back streams are the same, we
     * can collapse the instructions 1,2,(3,4,1,2),3,4 to 1,2,3,4. We basically cut out the
     * middle part. This function handles this.
     */
    private static function foldData(&$data)
    {
        $previous_key = null;
        $previous_val = null;
        $previous_previous_key = null;
        $previous_previous_val = null;
        $previous_previous_previous_key = null;
        $previous_previous_previous_val = null;
        foreach ($data as $k => $v) {

            if ($v["type"] == "stream_output_start"
                && !is_null($previous_previous_val)
                && $previous_previous_val["type"] == "stream_output_end"
                && self::areEventsLinked($previous_previous_val, $v)) {

                unset($data[$previous_previous_previous_key]);
                unset($data[$previous_previous_key]);
                unset($data[$previous_key]);
                if ($previous_previous_val['uri'] == $v['uri']) {
                    unset($data[$k]);
                }
            }

            $previous_previous_previous_key = $previous_previous_key;
            $previous_previous_previous_val = $previous_previous_val;
            $previous_previous_key = $previous_key;
            $previous_previous_val = $previous_val;
            $previous_key = $k;
            $previous_val = $v;
        }
    }

    public static function getSchedule($p_fromDateTime = null, $p_toDateTime = null)
    {
        list($range_start, $range_end) = self::getRangeStartAndEnd($p_fromDateTime, $p_toDateTime);

        $data = array();
        $data["media"] = array();

        //Harbor kick times *MUST* be ahead of schedule events, so that pypo
        //executes them first.
        self::createInputHarborKickTimes($data, $range_start, $range_end);
        self::createScheduledEvents($data, $range_start, $range_end);

        //self::foldData($data["media"]);
        return $data;
    }

    public static function deleteAll()
    {
        $sql = "TRUNCATE TABLE cc_schedule";
        Application_Common_Database::prepareAndExecute($sql, array(),
            Application_Common_Database::EXECUTE);
    }

    public static function deleteWithFileId($fileId)
    {
        $sql = "DELETE FROM cc_schedule WHERE file_id=:file_id";
        Application_Common_Database::prepareAndExecute($sql, array(':file_id'=>$fileId), 'execute');
    }

    /*public static function createNewFormSections($p_view)
    {
        $formWhat    = new Application_Form_AddShowWhat();
        $formWho     = new Application_Form_AddShowWho();
        $formWhen    = new Application_Form_AddShowWhen();
        $formRepeats = new Application_Form_AddShowRepeats();
        $formStyle   = new Application_Form_AddShowStyle();
        $formLive    = new Application_Form_AddShowLiveStream();

        $formWhat->removeDecorator('DtDdWrapper');
        $formWho->removeDecorator('DtDdWrapper');
        $formWhen->removeDecorator('DtDdWrapper');
        $formRepeats->removeDecorator('DtDdWrapper');
        $formStyle->removeDecorator('DtDdWrapper');
        $formLive->removeDecorator('DtDdWrapper');

        $p_view->what = $formWhat;
        $p_view->when = $formWhen;
        $p_view->repeats = $formRepeats;
        $p_view->who = $formWho;
        $p_view->style = $formStyle;
        $p_view->live = $formLive;

        $formWhat->populate(array('add_show_id' => '-1',
                                      'add_show_instance_id' => '-1'));
        $formWhen->populate(array('add_show_start_date' => date("Y-m-d"),
                                      'add_show_start_time' => '00:00',
                                      'add_show_end_date_no_repeate' => date("Y-m-d"),
                                      'add_show_end_time' => '01:00',
                                      'add_show_duration' => '01h 00m'));

        $formRepeats->populate(array('add_show_end_date' => date("Y-m-d")));

            $formRecord = new Application_Form_AddShowRR();
            $formAbsoluteRebroadcast = new Application_Form_AddShowAbsoluteRebroadcastDates();
            $formRebroadcast = new Application_Form_AddShowRebroadcastDates();

            $formRecord->removeDecorator('DtDdWrapper');
            $formAbsoluteRebroadcast->removeDecorator('DtDdWrapper');
            $formRebroadcast->removeDecorator('DtDdWrapper');

            $p_view->rr = $formRecord;
            $p_view->absoluteRebroadcast = $formAbsoluteRebroadcast;
            $p_view->rebroadcast = $formRebroadcast;
        $p_view->addNewShow = true;
    }*/

    /* This function is responsible for handling the case where an individual
     * show instance in a repeating show was edited (via the context menu in the Calendar).
     * There is still lots of clean-up to do. For example we shouldn't be passing $controller into
     * this method to manipulate the view (this should be done inside the controller function). With
     * 2.1 deadline looming, this is OK for now. -Martin */
    public static function updateShowInstance($data, $controller)
    {
        $formWhat    = new Application_Form_AddShowWhat();
        $formWhen    = new Application_Form_AddShowWhen();
        $formRepeats = new Application_Form_AddShowRepeats();
        $formWho     = new Application_Form_AddShowWho();
        $formStyle   = new Application_Form_AddShowStyle();
        $formLive    = new Application_Form_AddShowLiveStream();

        $formWhat->removeDecorator('DtDdWrapper');
        $formWhen->removeDecorator('DtDdWrapper');
        $formRepeats->removeDecorator('DtDdWrapper');
        $formWho->removeDecorator('DtDdWrapper');
        $formStyle->removeDecorator('DtDdWrapper');
        $formLive->removeDecorator('DtDdWrapper');

            $formRecord = new Application_Form_AddShowRR();
            $formAbsoluteRebroadcast = new Application_Form_AddShowAbsoluteRebroadcastDates();
            $formRebroadcast = new Application_Form_AddShowRebroadcastDates();

            $formRecord->removeDecorator('DtDdWrapper');
            $formAbsoluteRebroadcast->removeDecorator('DtDdWrapper');
            $formRebroadcast->removeDecorator('DtDdWrapper');
        $when = $formWhen->isValid($data);

        if ($when && $formWhen->checkReliantFields($data, true, null, true)) {
            $start_dt = new DateTime($data['add_show_start_date']." ".$data['add_show_start_time'],
                    new DateTimeZone(date_default_timezone_get()));
            $start_dt->setTimezone(new DateTimeZone('UTC'));

            $end_dt = new DateTime($data['add_show_end_date_no_repeat']." ".$data['add_show_end_time'],
                    new DateTimeZone(date_default_timezone_get()));
            $end_dt->setTimezone(new DateTimeZone('UTC'));

            $ccShowInstance = CcShowInstancesQuery::create()->findPK($data["add_show_instance_id"]);
            $ccShowInstance->setDbStarts($start_dt);
            $ccShowInstance->setDbEnds($end_dt);
            $ccShowInstance->save();

            Application_Model_Schedule::createNewFormSections($controller->view);

            return true;
        } else {
            $formWhat->disable();
            $formWhen->disableRepeatCheckbox();
            $formRepeats->disable();
            $formWho->disable();
            $formStyle->disable();
            //$formLive->disable();

            $controller->view->what    = $formWhat;
            $controller->view->when    = $formWhen;
            $controller->view->repeats = $formRepeats;
            $controller->view->who     = $formWho;
            $controller->view->style   = $formStyle;
            $controller->view->live    = $formLive;
                $controller->view->rr = $formRecord;
                $controller->view->absoluteRebroadcast = $formAbsoluteRebroadcast;
                $controller->view->rebroadcast = $formRebroadcast;

                //$formRecord->disable();
                //$formAbsoluteRebroadcast->disable();
                //$formRebroadcast->disable();

            return false;
        }
    }

    /* This function is responsible for handling the case where the entire show (not a single show instance)
     * was edited (via the context menu in the Calendar).
     * There is still lots of clean-up to do. For example we shouldn't be passing $controller into
     * this method to manipulate the view (this should be done inside the controller function). With
     * 2.1 deadline looming, this is OK for now.
     * Another clean-up is to move all the form manipulation to the proper form class.....
     * -Martin
     */
    /*public static function addUpdateShow($data, $controller, $validateStartDate,
        $originalStartDate=null, $update=false, $instanceId=null)
    {
        $userInfo = Zend_Auth::getInstance()->getStorage()->read();
        $user = new Application_Model_User($userInfo->id);
        $isAdminOrPM = $user->isUserType(array(UTYPE_ADMIN, UTYPE_PROGRAM_MANAGER));

        $record = false;

        $formWhat    = new Application_Form_AddShowWhat();
        $formWho     = new Application_Form_AddShowWho();
        $formWhen    = new Application_Form_AddShowWhen();
        $formRepeats = new Application_Form_AddShowRepeats();
        $formStyle   = new Application_Form_AddShowStyle();
        $formLive    = new Application_Form_AddShowLiveStream();

        $formWhat->removeDecorator('DtDdWrapper');
        $formWho->removeDecorator('DtDdWrapper');
        $formWhen->removeDecorator('DtDdWrapper');
        $formRepeats->removeDecorator('DtDdWrapper');
        $formStyle->removeDecorator('DtDdWrapper');
        $formLive->removeDecorator('DtDdWrapper');

        $what = $formWhat->isValid($data);
        $when = $formWhen->isValid($data);
        $live = $formLive->isValid($data);
        if ($when) {
            $when = $formWhen->checkReliantFields($data, $validateStartDate, $originalStartDate, $update, $instanceId);
        }

        //The way the following code works is that is parses the hour and
        //minute from a string with the format "1h 20m" or "2h" or "36m".
        //So we are detecting whether an hour or minute value exists via strpos
        //and then parse appropriately. A better way to do this in the future is
        //actually pass the format from javascript in the format hh:mm so we don't
        //have to do this extra String parsing.
        $hPos = strpos($data["add_show_duration"], 'h');
        $mPos = strpos($data["add_show_duration"], 'm');

        $hValue = 0;
        $mValue = 0;

        if ($hPos !== false) {
            $hValue = trim(substr($data["add_show_duration"], 0, $hPos));
        }
        if ($mPos !== false) {
            $hPos = $hPos === false ? 0 : $hPos+1;
            $mValue = trim(substr($data["add_show_duration"], $hPos, -1 ));
        }

        $data["add_show_duration"] = $hValue.":".$mValue;

        $formRecord = new Application_Form_AddShowRR();
        $formAbsoluteRebroadcast = new Application_Form_AddShowAbsoluteRebroadcastDates();
        $formRebroadcast = new Application_Form_AddShowRebroadcastDates();

        $formRecord->removeDecorator('DtDdWrapper');
        $formAbsoluteRebroadcast->removeDecorator('DtDdWrapper');
        $formRebroadcast->removeDecorator('DtDdWrapper');


            $record = $formRecord->isValid($data);

        if ($data["add_show_repeats"]) {
            $repeats = $formRepeats->isValid($data);
            if ($repeats) {
                $repeats = $formRepeats->checkReliantFields($data);
            }
            $formAbsoluteRebroadcast->reset();
            //make it valid, results don't matter anyways.
            $rebroadAb = 1;

            if ($data["add_show_rebroadcast"]) {
                $rebroad = $formRebroadcast->isValid($data);
                if ($rebroad) {
                    $rebroad = $formRebroadcast->checkReliantFields($data);
                }
            } else {
                $rebroad = 1;
            }
        } else {
            $repeats = 1;
                $formRebroadcast->reset();
                 //make it valid, results don't matter anyways.
                $rebroad = 1;

                if ($data["add_show_rebroadcast"]) {
                    $rebroadAb = $formAbsoluteRebroadcast->isValid($data);
                    if ($rebroadAb) {
                        $rebroadAb = $formAbsoluteRebroadcast->checkReliantFields($data);
                    }
                } else {
                    $rebroadAb = 1;
                }
        }

        $who = $formWho->isValid($data);
        $style = $formStyle->isValid($data);
        if ($what && $when && $repeats && $who && $style && $live) {
                if ($record && $rebroadAb && $rebroad) {
                    if ($isAdminOrPM) {
                        Application_Model_Show::create($data);
                    }

                    //send back a new form for the user.
                    Application_Model_Schedule::createNewFormSections($controller->view);

                    //$controller->view->newForm = $controller->view->render('schedule/add-show-form.phtml');
                    return true;
                } else {
                    $controller->view->what = $formWhat;
                    $controller->view->when = $formWhen;
                    $controller->view->repeats = $formRepeats;
                    $controller->view->who = $formWho;
                    $controller->view->style = $formStyle;
                    $controller->view->rr = $formRecord;
                    $controller->view->absoluteRebroadcast = $formAbsoluteRebroadcast;
                    $controller->view->rebroadcast = $formRebroadcast;
                    $controller->view->live = $formLive;
                    //$controller->view->addNewShow = !$editShow;

                    //$controller->view->form = $controller->view->render('schedule/add-show-form.phtml');
                    return false;

                }
        } else {
            $controller->view->what    = $formWhat;
            $controller->view->when    = $formWhen;
            $controller->view->repeats = $formRepeats;
            $controller->view->who     = $formWho;
            $controller->view->style   = $formStyle;
            $controller->view->live    = $formLive;
            $controller->view->rr = $formRecord;
            $controller->view->absoluteRebroadcast = $formAbsoluteRebroadcast;
            $controller->view->rebroadcast = $formRebroadcast;
            //$controller->view->addNewShow = !$editShow;
            //$controller->view->form = $controller->view->render('schedule/add-show-form.phtml');
            return false;
        }
    }*/

    public static function checkOverlappingShows($show_start, $show_end,
        $update=false, $instanceId=null, $showId=null)
    {
        $overlapping = false;

        $params = array(
            ':show_end1'  => $show_end->format('Y-m-d H:i:s'),
            ':show_end2'  => $show_end->format('Y-m-d H:i:s'),
            ':show_end3'  => $show_end->format('Y-m-d H:i:s')
        );


        /* If a show is being edited, exclude it from the query
         * In both cases (new and edit) we only grab shows that
         * are scheduled 2 days prior
         */
        if ($update) {
            $sql = <<<SQL
SELECT id,
       starts,
       ends
FROM cc_show_instances
WHERE (ends <= :show_end1
       OR starts <= :show_end2)
  AND date(starts) >= (date(:show_end3) - INTERVAL '2 days')
  AND modified_instance = FALSE
SQL;
            if (is_null($showId)) {
                $sql .= <<<SQL
  AND id != :instanceId
ORDER BY ends
SQL;
                $params[':instanceId'] = $instanceId;
            } else {
                $sql .= <<<SQL
  AND show_id != :showId
ORDER BY ends
SQL;
                $params[':showId'] = $showId;
            }
            $rows = Application_Common_Database::prepareAndExecute($sql, $params, 'all');
        } else {
            $sql = <<<SQL
SELECT id,
       starts,
       ends
FROM cc_show_instances
WHERE (ends <= :show_end1
       OR starts <= :show_end2)
  AND date(starts) >= (date(:show_end3) - INTERVAL '2 days')
  AND modified_instance = FALSE
ORDER BY ends
SQL;

            $rows = Application_Common_Database::prepareAndExecute($sql, array(
                ':show_end1' => $show_end->format('Y-m-d H:i:s'),
                ':show_end2' => $show_end->format('Y-m-d H:i:s'),
                ':show_end3' => $show_end->format('Y-m-d H:i:s')), 'all');
        }

        foreach ($rows as $row) {
            $start = new DateTime($row["starts"], new DateTimeZone('UTC'));
            $end   = new DateTime($row["ends"], new DateTimeZone('UTC'));

            if ($show_start->getTimestamp() < $end->getTimestamp() &&
                $show_end->getTimestamp() > $start->getTimestamp()) {
                $overlapping = true;
                break;
            }
        }

        return $overlapping;
    }

    public static function GetType($p_scheduleId){
        $scheduledItem = CcScheduleQuery::create()->findPK($p_scheduleId);
        if ($scheduledItem->getDbFileId() == null) {
            return 'webstream';
        } else {
            return 'file';
        }
    }

    public static function GetFileId($p_scheduleId)
    {
        $scheduledItem = CcScheduleQuery::create()->findPK($p_scheduleId);

        return $scheduledItem->getDbFileId();
    }

    public static function GetStreamId($p_scheduleId)
    {
        $scheduledItem = CcScheduleQuery::create()->findPK($p_scheduleId);

        return $scheduledItem->getDbStreamId();
    }
}
