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<?php
/*
 * Spring Signage Ltd - http://www.springsignage.com
 * Copyright (C) 2015 Spring Signage Ltd
 * (Schedule.php)
 */

namespace Xibo\Entity;

use Jenssegers\Date\Date;
use Respect\Validation\Validator as v;
use Stash\Interfaces\PoolInterface;
use Xibo\Exception\ConfigurationException;
use Xibo\Exception\InvalidArgumentException;
use Xibo\Exception\XiboException;
use Xibo\Factory\DayPartFactory;
use Xibo\Factory\DisplayFactory;
use Xibo\Factory\DisplayGroupFactory;
use Xibo\Service\ConfigServiceInterface;
use Xibo\Service\DateServiceInterface;
use Xibo\Service\LogServiceInterface;
use Xibo\Storage\StorageServiceInterface;

/**
 * Class Schedule
 * @package Xibo\Entity
 *
 * @SWG\Definition()
 */
class Schedule implements \JsonSerializable
{
    use EntityTrait;

public static $LAYOUT_EVENT = 1;
    public static $COMMAND_EVENT = 2;
    public static $OVERLAY_EVENT = 3;
    public static $DATE_MIN = 0;
    public static $DATE_MAX = 2147483647;

/**
     * @SWG\Property(
     *  description="The ID of this Event"
     * )
     * @var int
     */
    public $eventId;

/**
     * @SWG\Property(
     *  description="The Event Type ID"
     * )
     * @var int
     */
    public $eventTypeId;

/**
     * @SWG\Property(
     *  description="The CampaignID this event is for"
     * )
     * @var int
     */
    public $campaignId;

/**
     * @SWG\Property(
     *  description="The CommandId this event is for"
     * )
     * @var int
     */
    public $commandId;

/**
     * @SWG\Property(
     *  description="Display Groups assigned to this Scheduled Event.",
     *  type="array",
     *  @SWG\Items(ref="#/definitions/DisplayGroup")
     * )
     * @var DisplayGroup[]
     */
    public $displayGroups = [];

/**
     * @SWG\Property(
     *  description="The userId that owns this event."
     * )
     * @var int
     */
    public $userId;

/**
     * @SWG\Property(
     *  description="A Unix timestamp representing the from date of this event in CMS time."
     * )
     * @var int
     */
    public $fromDt;

/**
     * @SWG\Property(
     *  description="A Unix timestamp representing the to date of this event in CMS time."
     * )
     * @var int
     */
    public $toDt;

/**
     * @SWG\Property(
     *  description="Integer indicating the event priority."
     * )
     * @var int
     */
    public $isPriority;

/**
     * @SWG\Property(
     *  description="The display order for this event."
     * )
     * @var int
     */
    public $displayOrder;

/**
     * @SWG\Property(
     *  description="If this event recurs when what is the recurrence period.",
     *  enum={"None", "Minute", "Hour", "Day", "Week", "Month", "Year"}
     * )
     * @var string
     */
    public $recurrenceType;

/**
     * @SWG\Property(
     *  description="If this event recurs when what is the recurrence frequency.",
     * )
     * @var int
     */
    public $recurrenceDetail;

/**
     * @SWG\Property(
     *  description="A Unix timestamp indicating the end time of the recurring events."
     * )
     * @var int
     */
    public $recurrenceRange;

/**
     * @SWG\Property(description="Recurrence repeats on days - 0 to 7 where 0 is a monday")
     * @var string
     */
    public $recurrenceRepeatsOn;

/**
     * @SWG\Property(
     *  description="The Campaign/Layout Name",
     *  readOnly=true
     * )
     * @var string
     */
    public $campaign;

/**
     * @SWG\Property(
     *  description="The Command Name",
     *  readOnly=true
     * )
     * @var string
     */
    public $command;

/**
     * @SWG\Property(
     *  description="The Day Part Id"
     * )
     * @var int
     */
    public $dayPartId;

/**
     * @SWG\Property(description="Is this event an always on event?")
     * @var int
     */
    public $isAlways;

/**
     * @SWG\Property(description="Does this event have custom from/to date times?")
     * @var int
     */
    public $isCustom;

/**
     * Last Recurrence Watermark
     * @var int
     */
    public $lastRecurrenceWatermark;

/**
     * @SWG\Property(description="Flag indicating whether the event will sync to the Display timezone")
     * @var int
     */
    public $syncTimezone;

/**
     * @var ScheduleEvent[]
     */
    private $scheduleEvents = [];

/**
     * @var ConfigServiceInterface
     */
    private $config;

/** @var  DateServiceInterface */
    private $dateService;

/** @var  PoolInterface */
    private $pool;

/**
     * @var DisplayGroupFactory
     */
    private $displayGroupFactory;

/** @var  DisplayFactory */
    private $displayFactory;

/** @var  DayPartFactory */
    private $dayPartFactory;

/**
     * Entity constructor.
     * @param StorageServiceInterface $store
     * @param LogServiceInterface $log
     * @param ConfigServiceInterface $config
     * @param PoolInterface $pool
     * @param DateServiceInterface $date
     * @param DisplayGroupFactory $displayGroupFactory
     * @param DayPartFactory $dayPartFactory
     */
    public function __construct($store, $log, $config, $pool, $date, $displayGroupFactory, $dayPartFactory)
    {
        $this->setCommonDependencies($store, $log);
        $this->config = $config;
        $this->pool = $pool;
        $this->dateService = $date;
        $this->displayGroupFactory = $displayGroupFactory;
        $this->dayPartFactory = $dayPartFactory;

$this->excludeProperty('lastRecurrenceWatermark');
    }

public function __clone()
    {
        $this->eventId = null;
    }

/**
     * @param DisplayFactory $displayFactory
     * @return $this
     */
    public function setDisplayFactory($displayFactory)
    {
        $this->displayFactory = $displayFactory;
        return $this;
    }

/**
     * @param DateServiceInterface $dateService
     * @deprecated dateService is set by the factory
     * @return $this
     */
    public function setDateService($dateService)
    {
        $this->dateService = $dateService;
        return $this;
    }

/**
     * @return DateServiceInterface
     * @throws ConfigurationException
     */
    private function getDate()
    {
        if ($this->dateService == null)
            throw new ConfigurationException('Application Error: Date Service is not set on Schedule Entity');

return $this->dateService;
    }

/**
     * @return int
     */
    public function getId()
    {
        return $this->eventId;
    }

/**
     * @return int
     */
    public function getOwnerId()
    {
        return $this->userId;
    }

/**
     * Sets the Owner
     * @param int $ownerId
     */
    public function setOwner($ownerId)
    {
        $this->userId = $ownerId;
    }

/**
     * Are the provided dates within the schedule look ahead
     * @return bool
     * @throws XiboException
     */
    private function inScheduleLookAhead()
    {
        if ($this->isAlwaysDayPart())
            return true;

// From Date and To Date are in UNIX format
        $currentDate = $this->getDate()->parse();
        $rfLookAhead = clone $currentDate;
        $rfLookAhead->addSeconds(intval($this->config->GetSetting('REQUIRED_FILES_LOOKAHEAD')));

// Dial current date back to the start of the day
        $currentDate->startOfDay();

// Test dates
        if ($this->recurrenceType != '') {
            // A recurring event
            $this->getLog()->debug('Checking look ahead based on recurrence');
            // we should check whether the event from date is before the lookahead (i.e. the event has recurred once)
            // we should also check whether the recurrence range is still valid (i.e. we've not stopped recurring and we don't recur forever)
            return (
                $this->fromDt <= $rfLookAhead->format('U')
                && ($this->recurrenceRange == 0 || $this->recurrenceRange > $currentDate->format('U'))
            );
        } else if (!$this->isCustomDayPart() || $this->eventTypeId == self::$COMMAND_EVENT) {
            // Day parting event (non recurring) or command event
            // only test the from date.
            $this->getLog()->debug('Checking look ahead based from date ' . $currentDate->toRssString());
            return ($this->fromDt >= $currentDate->format('U') && $this->fromDt <= $rfLookAhead->format('U'));
        } else {
            // Compare the event dates
            $this->getLog()->debug('Checking look ahead based event dates ' . $currentDate->toRssString() . ' / ' . $rfLookAhead->toRssString());
            return ($this->fromDt <= $rfLookAhead->format('U') && $this->toDt >= $currentDate->format('U'));
        }
    }

/**
     * Load
     */
    public function load()
    {
        // If we are already loaded, then don't do it again
        if ($this->loaded || $this->eventId == null || $this->eventId == 0)
            return;

$this->displayGroups = $this->displayGroupFactory->getByEventId($this->eventId);

// We are fully loaded
        $this->loaded = true;
    }

/**
     * Assign DisplayGroup
     * @param DisplayGroup $displayGroup
     */
    public function assignDisplayGroup($displayGroup)
    {
        $this->load();

if (!in_array($displayGroup, $this->displayGroups))
            $this->displayGroups[] = $displayGroup;
    }

/**
     * Unassign DisplayGroup
     * @param DisplayGroup $displayGroup
     */
    public function unassignDisplayGroup($displayGroup)
    {
        $this->load();

$this->displayGroups = array_udiff($this->displayGroups, [$displayGroup], function ($a, $b) {
            /**
             * @var DisplayGroup $a
             * @var DisplayGroup $b
             */
            return $a->getId() - $b->getId();
        });
    }

/**
     * Validate
     * @throws XiboException
     */
    public function validate()
    {
        if (count($this->displayGroups) <= 0)
            throw new InvalidArgumentException(__('No display groups selected'), 'displayGroups');

$this->getLog()->debug('EventTypeId: %d. DayPartId: %d, CampaignId: %d, CommandId: %d', $this->eventTypeId, $this->dayPartId, $this->campaignId, $this->commandId);

if ($this->eventTypeId == Schedule::$LAYOUT_EVENT || $this->eventTypeId == Schedule::$OVERLAY_EVENT) {
            // Validate layout
            if (!v::intType()->notEmpty()->validate($this->campaignId))
                throw new InvalidArgumentException(__('Please select a Campaign/Layout for this event.'), 'campaignId');

if ($this->isCustomDayPart()) {
                // validate the dates
                if ($this->toDt <= $this->fromDt)
                    throw new InvalidArgumentException(__('Can not have an end time earlier than your start time'), 'start/end');
            }

$this->commandId = null;

} else if ($this->eventTypeId == Schedule::$COMMAND_EVENT) {
            // Validate command
            if (!v::intType()->notEmpty()->validate($this->commandId))
                throw new InvalidArgumentException(__('Please select a Command for this event.'), 'command');

$this->campaignId = null;
            $this->toDt = null;

} else {
            // No event type selected
            throw new InvalidArgumentException(__('Please select the Event Type'), 'eventTypeId');
        }

// Make sure we have a sensible recurrence setting
        if (!$this->isCustomDayPart() && ($this->recurrenceType == 'Minute' || $this->recurrenceType == 'Hour'))
            throw new InvalidArgumentException(__('Repeats selection is invalid for Always or Daypart events'), 'recurrencyType');

// Check display order is positive
        if ($this->displayOrder < 0)
            throw new InvalidArgumentException(__('Display Order must be 0 or a positive number'), 'displayOrder');

// Check priority is positive
        if ($this->isPriority < 0)
            throw new InvalidArgumentException(__('Priority must be 0 or a positive number'), 'isPriority');

// Check recurrenceDetail every is positive
        if ($this->recurrenceDetail < 0)
            throw new InvalidArgumentException(__('Repeat every must be a positive number'), 'recurrenceDetail');
    }

/**
     * Save
     * @param array $options
     * @throws XiboException
     */
    public function save($options = [])
    {
        $options = array_merge([
            'validate' => true,
            'audit' => true,
            'deleteOrphaned' => false,
            'notify' => true
        ], $options);

if ($options['validate'])
            $this->validate();

// Handle "always" day parts
        if ($this->isAlwaysDayPart()) {
            $this->fromDt = self::$DATE_MIN;
            $this->toDt = self::$DATE_MAX;
        }

if ($this->eventId == null || $this->eventId == 0) {
            $this->add();
            $auditMessage = 'Added';
            $this->loaded = true;
        }
        else {
            // If this save action means there aren't any display groups assigned
            // and if we're set to deleteOrphaned, then delete
            if ($options['deleteOrphaned'] && count($this->displayGroups) <= 0) {
                $this->delete();
                return;
            } else {
                $this->edit();
                $auditMessage = 'Saved';
            }
        }

// Manage display assignments
        if ($this->loaded) {
            // Manage assignments
            $this->manageAssignments();
        }

// Notify
        if ($options['notify']) {
            // Only if the schedule effects the immediate future - i.e. within the RF Look Ahead
            if ($this->inScheduleLookAhead()) {
                $this->getLog()->debug('Schedule changing is within the schedule look ahead, will notify ' . count($this->displayGroups) . ' display groups');
                foreach ($this->displayGroups as $displayGroup) {
                    /* @var DisplayGroup $displayGroup */
                    $this->displayFactory->getDisplayNotifyService()->collectNow()->notifyByDisplayGroupId($displayGroup->displayGroupId);
                }
            } else {
                $this->getLog()->debug('Schedule changing is not within the schedule look ahead');
            }
        }

if ($options['audit'])
            $this->audit($this->getId(), $auditMessage);

// Drop the cache for this event
        $this->dropEventCache();
    }

/**
     * Delete this Schedule Event
     */
    public function delete()
    {
        $this->load();

// Notify display groups
        $notify = $this->displayGroups;

// Delete display group assignments
        $this->displayGroups = [];
        $this->unlinkDisplayGroups();

// Delete the event itself
        $this->getStore()->update('DELETE FROM `schedule` WHERE eventId = :eventId', ['eventId' => $this->eventId]);

// Notify
        // Only if the schedule effects the immediate future - i.e. within the RF Look Ahead
        if ($this->inScheduleLookAhead() && $this->displayFactory !== null) {
            $this->getLog()->debug('Schedule changing is within the schedule look ahead, will notify ' . count($notify) . ' display groups');
            foreach ($notify as $displayGroup) {
                /* @var DisplayGroup $displayGroup */
                $this->displayFactory->getDisplayNotifyService()->collectNow()->notifyByDisplayGroupId($displayGroup->displayGroupId);
            }
        } else if ($this->displayFactory === null) {
            $this->getLog()->info('Notify disabled, dependencies not set');
        }

// Drop the cache for this event
        $this->dropEventCache();

// Audit
        $this->audit($this->getId(), 'Deleted', $this->toArray());
    }

/**
     * Add
     */
    private function add()
    {
        $this->eventId = $this->getStore()->insert('
          INSERT INTO `schedule` (eventTypeId, CampaignId, commandId, userID, is_priority, FromDT, ToDT, DisplayOrder, recurrence_type, recurrence_detail, recurrence_range, `recurrenceRepeatsOn`, `dayPartId`, `syncTimezone`)
            VALUES (:eventTypeId, :campaignId, :commandId, :userId, :isPriority, :fromDt, :toDt, :displayOrder, :recurrenceType, :recurrenceDetail, :recurrenceRange, :recurrenceRepeatsOn, :dayPartId, :syncTimezone)
        ', [
            'eventTypeId' => $this->eventTypeId,
            'campaignId' => $this->campaignId,
            'commandId' => $this->commandId,
            'userId' => $this->userId,
            'isPriority' => $this->isPriority,
            'fromDt' => $this->fromDt,
            'toDt' => $this->toDt,
            'displayOrder' => $this->displayOrder,
            'recurrenceType' => $this->recurrenceType,
            'recurrenceDetail' => $this->recurrenceDetail,
            'recurrenceRange' => $this->recurrenceRange,
            'recurrenceRepeatsOn' => $this->recurrenceRepeatsOn,
            'dayPartId' => $this->dayPartId,
            'syncTimezone' => $this->syncTimezone
        ]);
    }

/**
     * Edit
     */
    private function edit()
    {
        $this->getStore()->update('
          UPDATE `schedule` SET
            eventTypeId = :eventTypeId,
            campaignId = :campaignId,
            commandId = :commandId,
            is_priority = :isPriority,
            userId = :userId,
            fromDt = :fromDt,
            toDt = :toDt,
            displayOrder = :displayOrder,
            recurrence_type = :recurrenceType,
            recurrence_detail = :recurrenceDetail,
            recurrence_range = :recurrenceRange,
            `recurrenceRepeatsOn` = :recurrenceRepeatsOn,
            `dayPartId` = :dayPartId,
            `syncTimezone` = :syncTimezone
          WHERE eventId = :eventId
        ', [
            'eventTypeId' => $this->eventTypeId,
            'campaignId' => $this->campaignId,
            'commandId' => $this->commandId,
            'userId' => $this->userId,
            'isPriority' => $this->isPriority,
            'fromDt' => $this->fromDt,
            'toDt' => $this->toDt,
            'displayOrder' => $this->displayOrder,
            'recurrenceType' => $this->recurrenceType,
            'recurrenceDetail' => $this->recurrenceDetail,
            'recurrenceRange' => $this->recurrenceRange,
            'recurrenceRepeatsOn' => $this->recurrenceRepeatsOn,
            'dayPartId' => $this->dayPartId,
            'syncTimezone' => $this->syncTimezone,
            'eventId' => $this->eventId
        ]);
    }

/**
     * Get events between the provided dates.
     * @param Date $fromDt
     * @param Date $toDt
     * @return ScheduleEvent[]
     * @throws XiboException
     */
    public function getEvents($fromDt, $toDt)
    {
        // Copy the dates as we are going to be operating on them.
        $fromDt = $fromDt->copy();
        $toDt = $toDt->copy();

if ($this->pool == null)
            throw new ConfigurationException(__('Cache pool not available'));

if ($this->eventId == null)
            throw new InvalidArgumentException(__('Unable to generate schedule, unknown event'), 'eventId');

// What if we are requesting a single point in time?
        if ($fromDt == $toDt) {
            $this->log->debug('Requesting event for a single point in time: ' . $this->getDate()->getLocalDate($fromDt));
        }

$events = [];
        $fromTimeStamp = $fromDt->format('U');
        $toTimeStamp = $toDt->format('U');

// Rewind the from date to the start of the month
        $fromDt->startOfMonth();

if ($fromDt == $toDt) {
            $this->log->debug('From and To Dates are the same after rewinding 1 month, the date is the 1st of the month, adding a month to toDate.');
            $toDt->addMonth();
        }

// Request month cache
        while ($fromDt < $toDt) {
            $this->generateMonth($fromDt);

$this->getLog()->debug('Events: ' . json_encode($this->scheduleEvents, JSON_PRETTY_PRINT));

foreach ($this->scheduleEvents as $scheduleEvent) {

if (in_array($scheduleEvent, $events))
                    continue;

if ($scheduleEvent->toDt == null) {
                    if ($scheduleEvent->fromDt >= $fromTimeStamp && $scheduleEvent->toDt < $toTimeStamp)
                        $events[] = $scheduleEvent;
                } else {
                    if ($scheduleEvent->fromDt <= $toTimeStamp && $scheduleEvent->toDt > $fromTimeStamp)
                        $events[] = $scheduleEvent;
                }
            }

// Move the month forwards
            $fromDt->addMonth();
        }

$this->getLog()->debug('Filtered ' . count($this->scheduleEvents) . ' to ' . count($events));

return $events;
    }

/**
     * Generate Instances
     * @param Date $generateFromDt
     * @throws XiboException
     */
    private function generateMonth($generateFromDt)
    {
        $generateFromDt->startOfMonth();
        $generateToDt = $generateFromDt->copy()->addMonth();

$this->getLog()->debug('Request for schedule events on eventId ' . $this->eventId
            . ' from: ' . $this->getDate()->getLocalDate($generateFromDt)
            . ' to: ' . $this->getDate()->getLocalDate($generateToDt)
            . ' [eventId:' . $this->eventId . ']'
        );

// Events scheduled "always" will return one event
        if ($this->isAlwaysDayPart()) {
            // Create events with min/max dates
            $this->addDetail(Schedule::$DATE_MIN, Schedule::$DATE_MAX);
            return;
        }

// Load the dates into a date object for parsing
        $start = $this->getDate()->parse($this->fromDt, 'U');
        $end = ($this->toDt == null) ? $start->copy() : $this->getDate()->parse($this->toDt, 'U');

// If we are a daypart event, look up the start/end times for the event
        $this->calculateDayPartTimes($start, $end);

// Does the original event fall into this window?
        if ($start <= $generateToDt && $end > $generateFromDt) {
            // Add the detail for the main event (this is the event that originally triggered the generation)
            $this->addDetail($start->format('U'), $end->format('U'));
        } else {
            $this->getLog()->debug('Main event is not in the current generation window. [eventId:' . $this->eventId . ']');
        }

// If we don't have any recurrence, we are done
        if (empty($this->recurrenceType) || empty($this->recurrenceDetail))
            return;

// Detect invalid recurrences and quit early
        if (!$this->isCustomDayPart() && ($this->recurrenceType == 'Minute' || $this->recurrenceType == 'Hour'))
            return;

// Check the cache
        $item = $this->pool->getItem('schedule/' . $this->eventId . '/' . $generateFromDt->format('Y-m'));

if ($item->isHit()) {
            $this->scheduleEvents = $item->get();
            $this->getLog()->debug('Returning from cache! [eventId:' . $this->eventId . ']');
            return;
        }

$this->getLog()->debug('Cache miss! [eventId:' . $this->eventId . ']');

// vv anything below here means that the event window requested is not in the cache vv
        // WE ARE NOT IN THE CACHE
        // this means we need to always walk the tree from the last watermark
        // if the last watermark is after the from window, then we need to walk from the beginning

// Handle recurrence
        $lastWatermark = ($this->lastRecurrenceWatermark != 0) ? $this->getDate()->parse($this->lastRecurrenceWatermark, 'U') : $this->getDate()->parse(self::$DATE_MIN, 'U');

$this->getLog()->debug('Recurrence calculation required - last water mark is set to: ' . $lastWatermark->toRssString() . '. Event dates: ' . $start->toRssString() . ' - ' . $end->toRssString() . ' [eventId:' . $this->eventId . ']');

// Set the temp starts
        // the start date should be the latest of the event start date and the last recurrence date
        if ($lastWatermark > $start && $lastWatermark < $generateFromDt) {
            $this->getLog()->debug('The last watermark is later than the event start date and the generate from dt, using the watermark for forward population'
                . ' [eventId:' . $this->eventId . ']');

// Need to set the toDt based on the original event duration and the watermark start date
            $eventDuration = $start->diffInSeconds($end, true);

/** @var Date $start */
            $start = $lastWatermark->copy();
            $end = $start->copy()->addSeconds($eventDuration);
        }

// range should be the smallest of the recurrence range and the generate window todt
        // the start/end date should be the the first recurrence in the current window
        if ($this->recurrenceRange != 0) {
            $range = $this->getDate()->parse($this->recurrenceRange, 'U');

// Override the range to be within the period we are looking
            $range = ($range < $generateToDt) ? $range : $generateToDt->copy();
        } else {
            $range = $generateToDt->copy();
        }

$this->getLog()->debug('[' . $generateFromDt->toRssString() . ' - ' . $generateToDt->toRssString()
            . '] Looping from ' . $start->toRssString() . ' to ' . $range->toRssString() . ' [eventId:' . $this->eventId . ']');

// loop until we have added the recurring events for the schedule
        while ($start < $range)
        {
            $this->getLog()->debug('Loop: ' . $start->toRssString() . ' to ' . $range->toRssString() . ' [eventId:' . $this->eventId . ', end: ' . $end->toRssString() . ']');

// add the appropriate time to the start and end
            switch ($this->recurrenceType)
            {
                case 'Minute':
                    $start->minute($start->minute + $this->recurrenceDetail);
                    $end->minute($end->minute + $this->recurrenceDetail);
                    break;

case 'Hour':
                    $start->hour($start->hour + $this->recurrenceDetail);
                    $end->hour($end->hour + $this->recurrenceDetail);
                    break;

case 'Day':
                    $start->day($start->day + $this->recurrenceDetail);
                    $end->day($end->day + $this->recurrenceDetail);
                    break;

case 'Week':
                    // dayOfWeek is 0 for Sunday to 6 for Saturday
                    // daysSelected is 1 for Monday to 7 for Sunday
                    $dayOfWeekLookup = [7,1,2,3,4,5,6];

// recurrenceRepeatsOn will contain an array we can use to determine which days it should repeat
                    // on. Roll forward 7 days, adding each day we hit
                    // if we go over the start of the week, then jump forward by the recurrence range
                    if (!empty($this->recurrenceRepeatsOn)) {
                        // Parse days selected and add the necessary events
                        $daysSelected = explode(',', $this->recurrenceRepeatsOn);

// Are we on the start day of this week already?
                        $onStartOfWeek = ($start->copy()->setTime(0,0,0) == $start->copy()->startOfWeek()->setTime(0,0,0));

// What is the end of this week
                        $endOfWeek = $start->copy()->endOfWeek();

$this->getLog()->debug('Days selected: ' . $this->recurrenceRepeatsOn . '. End of week = ' . $endOfWeek . ' start date ' . $start . ' [eventId:' . $this->eventId . ']');

for ($i = 1; $i <= 7; $i++) {
                            // Add a day to the start dates
                            // after the first pass, we will already be on the first day of the week
                            if ($i > 1 || !$onStartOfWeek) {
                                $start->day($start->day + 1);
                                $end->day($end->day + 1);
                            }

$this->getLog()->debug('End of week = ' . $endOfWeek . ' assessing start date ' . $start . ' [eventId:' . $this->eventId . ']');

// If we go over the recurrence range, stop
                            // if we go over the start of the week, stop
                            if ($start > $range || $start > $endOfWeek) {
                                break;
                            }

// Is this day set?
                            if (!in_array($dayOfWeekLookup[$start->dayOfWeek], $daysSelected))
                                continue;

if ($start >= $generateFromDt) {
                                if ($this->eventTypeId == self::$COMMAND_EVENT) {
                                    $this->addDetail($start->format('U'), null);
                                }
                                else {
                                    // If we are a daypart event, look up the start/end times for the event
                                    $this->calculateDayPartTimes($start, $end);

$this->addDetail($start->format('U'), $end->format('U'));
                                }
                            }
                        }

$this->getLog()->debug('Finished 7 day roll forward, start date is ' . $start . ' [eventId:' . $this->eventId . ']');

// If we haven't passed the end of the week, roll forward
                        if ($start < $endOfWeek) {
                            $start->day($start->day + 1);
                            $end->day($end->day + 1);
                        }

// Wind back a week and then add our recurrence detail
                        $start->day($start->day - 7);
                        $end->day($end->day - 7);

$this->getLog()->debug('Resetting start date to ' . $start . ' [eventId:' . $this->eventId . ']');
                    }

// Jump forward a week from the original start date (when we entered this loop)
                    $start->day($start->day + ($this->recurrenceDetail * 7));
                    $end->day($end->day + ($this->recurrenceDetail * 7));

break;

case 'Month':
                    $start->month($start->month + $this->recurrenceDetail);
                    $end->month($end->month + $this->recurrenceDetail);
                    break;

case 'Year':
                    $start->year($start->year + $this->recurrenceDetail);
                    $end->year($end->year + $this->recurrenceDetail);
                    break;

default:
                    throw new InvalidArgumentException('Invalid recurrence type', 'recurrenceType');
            }

// after we have added the appropriate amount, are we still valid
            if ($start > $range) {
                $this->getLog()->debug('Breaking mid loop because we\'ve exceeded the range. Start: ' . $start->toRssString() . ', range: ' . $range->toRssString() . ' [eventId:' . $this->eventId . ']');
                break;
            }

// Push the watermark
            $lastWatermark = $start->copy();

// Don't add if we are weekly recurrency (handles it's own adding)
            if ($this->recurrenceType == 'Week' && !empty($this->recurrenceRepeatsOn))
                continue;

if ($start >= $generateFromDt) {
                if ($this->eventTypeId == self::$COMMAND_EVENT)
                    $this->addDetail($start->format('U'), null);
                else {
                    // If we are a daypart event, look up the start/end times for the event
                    $this->calculateDayPartTimes($start, $end);

$this->addDetail($start->format('U'), $end->format('U'));
                }
            }
        }

$this->getLog()->debug('Our last recurrence watermark is: ' . $lastWatermark->toRssString() . '[eventId:' . $this->eventId . ']');

// Update our schedule with the new last watermark
        $lastWatermarkTimeStamp = $lastWatermark->format('U');

if ($lastWatermarkTimeStamp != $this->lastRecurrenceWatermark) {
            $this->lastRecurrenceWatermark = $lastWatermarkTimeStamp;
            $this->getStore()->update('UPDATE `schedule` SET lastRecurrenceWatermark = :lastRecurrenceWatermark WHERE eventId = :eventId', [
                'eventId' => $this->eventId,
                'lastRecurrenceWatermark' => $this->lastRecurrenceWatermark
            ]);
        }

// Update the cache
        $item->set($this->scheduleEvents);
        $item->expiresAt(Date::now()->addMonths(2));

$this->pool->saveDeferred($item);

return;
    }

/**
     * Drop the event cache
     * @param $key
     */
    private function dropEventCache($key = null)
    {
        $compKey = 'schedule/' . $this->eventId;

if ($key !== null)
            $compKey .= '/' . $key;

$this->pool->deleteItem($compKey);
    }

/**
     * Calculate the DayPart times
     * @param Date $start
     * @param Date $end
     * @throws XiboException
     */
    private function calculateDayPartTimes($start, $end)
    {
        $dayOfWeekLookup = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];

if (!$this->isAlwaysDayPart() && !$this->isCustomDayPart()) {

// End is always based on Start
            $end->setTimestamp($start->format('U'));

$dayPart = $this->dayPartFactory->getById($this->dayPartId);

$this->getLog()->debug('Start and end time for dayPart is ' . $dayPart->startTime . ' - ' . $dayPart->endTime);

// What day of the week does this start date represent?
            // dayOfWeek is 0 for Sunday to 6 for Saturday
            $found = false;
            foreach ($dayPart->exceptions as $exception) {
                // Is there an exception for this day of the week?
                if ($exception['day'] == $dayOfWeekLookup[$start->dayOfWeek]) {
                    $start->setTimeFromTimeString($exception['start']);
                    $end->setTimeFromTimeString($exception['end']);

if ($start > $end)
                        $end->addDay();

$this->getLog()->debug('Found exception Start and end time for dayPart exception is ' . $exception['start'] . ' - ' . $exception['end']);
                    $found = true;
                    break;
                }
            }

if (!$found) {
                // Set the time section of our dates based on the daypart date
                $start->setTimeFromTimeString($dayPart->startTime);
                $end->setTimeFromTimeString($dayPart->endTime);

if ($start > $end) {
                    $this->getLog()->debug('Start is ahead of end - adding a day to the end date');
                    $end->addDay();
                }
            }
        }
    }

/**
     * Add Detail
     * @param int $fromDt
     * @param int $toDt
     */
    private function addDetail($fromDt, $toDt)
    {
        $this->scheduleEvents[] = new ScheduleEvent($fromDt, $toDt);
    }

/**
     * Manage the assignments
     */
    private function manageAssignments()
    {
        $this->linkDisplayGroups();
        $this->unlinkDisplayGroups();
    }

/**
     * Link Layout
     */
    private function linkDisplayGroups()
    {
        // TODO: Make this more efficient by storing the prepared SQL statement
        $sql = 'INSERT INTO `lkscheduledisplaygroup` (eventId, displayGroupId) VALUES (:eventId, :displayGroupId) ON DUPLICATE KEY UPDATE displayGroupId = displayGroupId';

$i = 0;
        foreach ($this->displayGroups as $displayGroup) {
            $i++;

$this->getStore()->insert($sql, array(
                'eventId' => $this->eventId,
                'displayGroupId' => $displayGroup->displayGroupId
            ));
        }
    }

/**
     * Unlink Layout
     */
    private function unlinkDisplayGroups()
    {
        // Unlink any layouts that are NOT in the collection
        $params = ['eventId' => $this->eventId];

$sql = 'DELETE FROM `lkscheduledisplaygroup` WHERE eventId = :eventId AND displayGroupId NOT IN (0';

$i = 0;
        foreach ($this->displayGroups as $displayGroup) {
            $i++;
            $sql .= ',:displayGroupId' . $i;
            $params['displayGroupId' . $i] = $displayGroup->displayGroupId;
        }

$sql .= ')';

$this->getStore()->update($sql, $params);
    }

/**
     * Is this event an always daypart event
     * @return bool
     * @throws \Xibo\Exception\NotFoundException
     */
    public function isAlwaysDayPart()
    {
        $dayPart = $this->dayPartFactory->getById($this->dayPartId);

return $dayPart->isAlways === 1;
    }

/**
     * Is this event a custom daypart event
     * @return bool
     * @throws \Xibo\Exception\NotFoundException
     */
    public function isCustomDayPart()
    {
        $dayPart = $this->dayPartFactory->getById($this->dayPartId);

return $dayPart->isCustom === 1;
    }
}