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<?php
/*
 * Xibo - Digital Signage - http://www.xibo.org.uk
 * Copyright (C) 2015 Spring Signage Ltd
 *
 * This file (Widget.php) is part of Xibo.
 *
 * Xibo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * Xibo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Xibo.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace Xibo\Entity;

use Xibo\Exception\NotFoundException;
use Xibo\Factory\DisplayFactory;
use Xibo\Factory\PermissionFactory;
use Xibo\Factory\PlaylistFactory;
use Xibo\Factory\WidgetAudioFactory;
use Xibo\Factory\WidgetMediaFactory;
use Xibo\Factory\WidgetOptionFactory;
use Xibo\Service\DateServiceInterface;
use Xibo\Service\LogServiceInterface;
use Xibo\Storage\StorageServiceInterface;
use Xibo\Widget\ModuleWidget;

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

/**
     * @SWG\Property(description="The Widget ID")
     * @var int
     */
    public $widgetId;

/**
     * @SWG\Property(description="The ID of the Playlist this Widget belongs to")
     * @var int
     */
    public $playlistId;

/**
     * @SWG\Property(description="The ID of the User that owns this Widget")
     * @var int
     */
    public $ownerId;

/**
     * @SWG\Property(description="The Module Type Code")
     * @var string
     */
    public $type;

/**
     * @SWG\Property(description="The duration in seconds this widget should be shown")
     * @var int
     */
    public $duration;

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

/**
     * @SWG\Property(description="Flag indicating if this widget has a duration that should be used")
     * @var int
     */
    public $useDuration;

/**
     * @SWG\Property(description="Calculated Duration of this widget after taking into account the useDuration flag")
     * @var int
     */
    public $calculatedDuration = 0;

/**
     * @var string
     * @SWG\Property(
     *  description="The datetime the Layout was created"
     * )
     */
    public $createdDt;

/**
     * @var string
     * @SWG\Property(
     *  description="The datetime the Layout was last modified"
     * )
     */
    public $modifiedDt;

/**
     * @SWG\Property(description="An array of Widget Options")
     * @var WidgetOption[]
     */
    public $widgetOptions = [];

/**
     * @SWG\Property(description="An array of MediaIds this widget is linked to")
     * @var int[]
     */
    public $mediaIds = [];

/**
     * @SWG\Property(description="An array of Audio MediaIds this widget is linked to")
     * @var WidgetAudio[]
     */
    public $audio = [];

/**
     * @SWG\Property(description="An array of permissions for this widget")
     * @var Permission[]
     */
    public $permissions = [];

/**
     * @SWG\Property(description="The Module Object for this Widget")
     * @var ModuleWidget $module
     */
    public $module;

/**
     * Hash Key of Media Assignments
     * @var string
     */
    private $mediaHash = null;

/**
     * Temporary Id used during import/upgrade
     * @var string read only string
     */
    public $tempId = null;

/**
     * Flag to indicate whether the widget is newly added
     * @var bool
     */
    public $isNew = false;

/** @var int[] Original Module Media Ids */
    private $originalModuleMediaIds = [];

/** @var array[int] Original Media IDs */
    private $originalMediaIds = [];

/** @var array[WidgetAudio] Original Widget Audio */
    private $originalAudio = [];

/**
     * Minimum duration for widgets
     * @var int
     */
    public static $widgetMinDuration = 1;

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

/**
     * @var WidgetOptionFactory
     */
    private $widgetOptionFactory;

/**
     * @var WidgetMediaFactory
     */
    private $widgetMediaFactory;

/** @var  WidgetAudioFactory */
    private $widgetAudioFactory;

/**
     * @var PermissionFactory
     */
    private $permissionFactory;

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

/** @var  PlaylistFactory */
    private $playlistFactory;

/**
     * Entity constructor.
     * @param StorageServiceInterface $store
     * @param LogServiceInterface $log
     * @param DateServiceInterface $date
     * @param WidgetOptionFactory $widgetOptionFactory
     * @param WidgetMediaFactory $widgetMediaFactory
     * @param WidgetAudioFactory $widgetAudioFactory
     * @param PermissionFactory $permissionFactory
     * @param DisplayFactory $displayFactory
     */
    public function __construct($store, $log, $date, $widgetOptionFactory, $widgetMediaFactory, $widgetAudioFactory, $permissionFactory, $displayFactory)
    {
        $this->setCommonDependencies($store, $log);
        $this->excludeProperty('module');
        $this->dateService = $date;
        $this->widgetOptionFactory = $widgetOptionFactory;
        $this->widgetMediaFactory = $widgetMediaFactory;
        $this->widgetAudioFactory = $widgetAudioFactory;
        $this->permissionFactory = $permissionFactory;
        $this->displayFactory = $displayFactory;
    }

/**
     * @param PlaylistFactory $playlistFactory
     * @return $this
     */
    public function setChildObjectDepencencies($playlistFactory)
    {
        $this->playlistFactory = $playlistFactory;
        return $this;
    }

public function __clone()
    {
        $this->hash = null;
        $this->widgetId = null;
        $this->widgetOptions = array_map(function ($object) { return clone $object; }, $this->widgetOptions);
        $this->permissions = [];

// No need to clone the media, but we should empty the original arrays of ids
        $this->originalMediaIds = [];
        $this->originalAudio = [];
    }

/**
     * String
     * @return string
     */
    public function __toString()
    {
        return sprintf('Widget. %s on playlist %d in position %d. WidgetId = %d', $this->type, $this->playlistId, $this->displayOrder, $this->widgetId);
    }

/**
     * Unique Hash
     * @return string
     */
    private function hash()
    {
        return md5($this->widgetId
            . $this->playlistId
            . $this->ownerId
            . $this->type
            . $this->duration
            . $this->displayOrder
            . $this->useDuration
            . $this->calculatedDuration
            . json_encode($this->widgetOptions)
        );
    }

/**
     * Hash of all media id's
     * @return string
     */
    private function mediaHash()
    {
        sort($this->mediaIds);
        return md5(implode(',', $this->mediaIds));
    }

/**
     * Get the Id
     * @return int
     */
    public function getId()
    {
        return $this->widgetId;
    }

/**
     * Get the OwnerId
     * @return int
     */
    public function getOwnerId()
    {
        return $this->ownerId;
    }

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

/**
     * Get Option
     * @param string $option
     * @return WidgetOption
     * @throws NotFoundException
     */
    public function getOption($option)
    {
        foreach ($this->widgetOptions as $widgetOption) {
            /* @var WidgetOption $widgetOption */
            if (strtolower($widgetOption->option) == strtolower($option))
                return $widgetOption;
        }

throw new NotFoundException('Widget Option not found');
    }

/**
     * Get Widget Option Value
     * @param string $option
     * @param mixed $default
     * @return mixed
     */
    public function getOptionValue($option, $default)
    {
        try {
            $widgetOption = $this->getOption($option);
            $widgetOption = (($widgetOption->value) === null) ? $default : $widgetOption->value;

if (is_integer($default))
                $widgetOption = intval($widgetOption);

return $widgetOption;
        }
        catch (NotFoundException $e) {
            return $default;
        }
    }

/**
     * Set Widget Option Value
     * @param string $option
     * @param string $type
     * @param mixed $value
     */
    public function setOptionValue($option, $type, $value)
    {
        try {
            $widgetOption = $this->getOption($option);
            $widgetOption->type = $type;
            $widgetOption->value = $value;
        }
        catch (NotFoundException $e) {
            $this->widgetOptions[] = $this->widgetOptionFactory->create($this->widgetId, $type, $option, $value);
        }
    }

/**
     * Assign File Media
     * @param int $mediaId
     */
    public function assignMedia($mediaId)
    {
        $this->load();

if (!in_array($mediaId, $this->mediaIds))
            $this->mediaIds[] = $mediaId;
    }

/**
     * Unassign File Media
     * @param int $mediaId
     */
    public function unassignMedia($mediaId)
    {
        $this->load();

$this->mediaIds = array_diff($this->mediaIds, [$mediaId]);
    }

/**
     * Count media
     * @return int count of media
     */
    public function countMedia()
    {
        $this->load();
        return count($this->mediaIds);
    }

/**
     * @return int
     * @throws NotFoundException
     */
    public function getPrimaryMediaId()
    {
        $primary = $this->getPrimaryMedia();

if (count($primary) <= 0)
            throw new NotFoundException(__('No file to return'));

return $primary[0];
    }

/**
     * Get Primary Media
     * @return int[]
     */
    public function getPrimaryMedia()
    {
        $this->load();

$this->getLog()->debug('Getting first primary media for Widget: ' . $this->widgetId . ' Media: ' . json_encode($this->mediaIds) . ' audio ' . json_encode($this->getAudioIds()));

if (count($this->mediaIds) <= 0)
            return [];

// Remove the audio media from this array
        return array_values(array_diff($this->mediaIds, $this->getAudioIds()));
    }

/**
     * Clear Media
     *  this must only clear module media, not "primary" media
     */
    public function clearCachedMedia()
    {
        $this->load();
        $this->mediaIds = array_values(array_diff($this->mediaIds, $this->originalModuleMediaIds));
    }

/**
     * Assign Audio Media
     * @param WidgetAudio $audio
     */
    public function assignAudio($audio)
    {
        $this->load();

$found = false;
        foreach ($this->audio as $existingAudio) {
            if ($existingAudio->mediaId == $audio->mediaId) {
                $existingAudio->loop = $audio->loop;
                $existingAudio->volume = $audio->volume;
                $found = true;
                break;
            }
        }

if (!$found)
            $this->audio[] = $audio;

// Assign the media
        $this->assignMedia($audio->mediaId);
    }

/**
     * Unassign Audio Media
     * @param int $mediaId
     */
    public function assignAudioById($mediaId)
    {
        $this->load();

$widgetAudio = $this->widgetAudioFactory->createEmpty();
        $widgetAudio->mediaId = $mediaId;
        $widgetAudio->volume = 100;
        $widgetAudio->loop = 0;

$this->assignAudio($widgetAudio);
    }

/**
     * Unassign Audio Media
     * @param WidgetAudio $audio
     */
    public function unassignAudio($audio)
    {
        $this->load();

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

// Unassign the media
        $this->unassignMedia($audio->mediaId);
    }

/**
     * Unassign Audio Media
     * @param int $mediaId
     */
    public function unassignAudioById($mediaId)
    {
        $this->load();

foreach ($this->audio as $audio) {

if ($audio->mediaId == $mediaId)
                $this->unassignAudio($audio);
        }
    }

/**
     * Count Audio
     * @return int
     */
    public function countAudio()
    {
        $this->load();

return count($this->audio);
    }

/**
     * Get AudioIds
     * @return int[]
     */
    public function getAudioIds()
    {
        $this->load();

return array_map(function($element) {
            /** @var WidgetAudio $element */
            return $element->mediaId;
        }, $this->audio);
    }

/**
     * Have the media assignments changed.
     */
    public function hasMediaChanged()
    {
        return ($this->mediaHash != $this->mediaHash());
    }

/**
     * Load the Widget
     */
    public function load()
    {
        if ($this->loaded || $this->widgetId == null || $this->widgetId == 0)
            return;

// Load permissions
        $this->permissions = $this->permissionFactory->getByObjectId(get_class(), $this->widgetId);

// Load the widget options
        $this->widgetOptions = $this->widgetOptionFactory->getByWidgetId($this->widgetId);

// Load any media assignments for this widget
        $this->mediaIds = $this->widgetMediaFactory->getByWidgetId($this->widgetId);
        $this->originalMediaIds = $this->mediaIds;
        $this->originalModuleMediaIds = $this->widgetMediaFactory->getModuleOnlyByWidgetId($this->widgetId);

// Load any widget audio assignments
        $this->audio = $this->widgetAudioFactory->getByWidgetId($this->widgetId);
        $this->originalAudio = $this->audio;

$this->hash = $this->hash();
        $this->mediaHash = $this->mediaHash();
        $this->loaded = true;
    }

/**
     * Save the widget
     * @param array $options
     */
    public function save($options = [])
    {
        // Default options
        $options = array_merge([
            'saveWidgetOptions' => true,
            'saveWidgetAudio' => true,
            'notify' => true,
            'notifyDisplays' => false,
            'audit' => true
        ], $options);

$this->getLog()->debug('Saving widgetId %d with options. %s', $this->getId(), json_encode($options, JSON_PRETTY_PRINT));

// Add/Edit
        if ($this->widgetId == null || $this->widgetId == 0)
            $this->add();
        else if ($this->hash != $this->hash())
            $this->update();

// Save the widget options
        if ($options['saveWidgetOptions']) {
            foreach ($this->widgetOptions as $widgetOption) {
                /* @var \Xibo\Entity\WidgetOption $widgetOption */

// Assert the widgetId
                $widgetOption->widgetId = $this->widgetId;
                $widgetOption->save();
            }
        }

// Save the widget audio
        if ($options['saveWidgetAudio']) {
            foreach ($this->audio as $audio) {
                /* @var \Xibo\Entity\WidgetAudio $audio */

// Assert the widgetId
                $audio->widgetId = $this->widgetId;
                $audio->save();
            }

$removedAudio = array_udiff($this->originalAudio, $this->audio, function($a, $b) {
                /**
                 * @var WidgetAudio $a
                 * @var WidgetAudio $b
                 */
                return $a->getId() - $b->getId();
            });

foreach ($removedAudio as $audio) {
                /* @var \Xibo\Entity\WidgetAudio $audio */

// Assert the widgetId
                $audio->widgetId = $this->widgetId;
                $audio->delete();
            }
        }

// Manage the assigned media
        $this->linkMedia();
        $this->unlinkMedia();

// Call notify with the notify options passed in
        $this->notify($options);

if ($options['audit']) {
            $changedProperties = $this->getChangedProperties();
            $changedItems = [];

foreach ($this->widgetOptions as $widgetOption) {
                $itemsProperties = $widgetOption->getChangedProperties();

if (count($itemsProperties) > 0)
                    $changedItems[] = $itemsProperties;
            }

if (count($changedItems) > 0) {
                $changedProperties['widgetOptions'] = $changedItems;
            }

$this->audit($this->widgetId, 'Saved', $changedProperties);
        }
    }

/**
     * @param array $options
     */
    public function delete($options = [])
    {
        $options = array_merge([
            'notify' => true,
            'notifyDisplays' => false
        ], $options);

// We must ensure everything is loaded before we delete
        $this->load();

// Delete Permissions
        foreach ($this->permissions as $permission) {
            /* @var Permission $permission */
            $permission->deleteAll();
        }

// Delete all Options
        foreach ($this->widgetOptions as $widgetOption) {
            /* @var \Xibo\Entity\WidgetOption $widgetOption */

// Assert the widgetId
            $widgetOption->widgetId = $this->widgetId;
            $widgetOption->delete();
        }

// Delete the widget audio
        foreach ($this->audio as $audio) {
            /* @var \Xibo\Entity\WidgetAudio $audio */

// Assert the widgetId
            $audio->widgetId = $this->widgetId;
            $audio->delete();
        }

// Unlink Media
        $this->mediaIds = [];
        $this->unlinkMedia();

// Delete this
        $this->getStore()->update('DELETE FROM `widget` WHERE widgetId = :widgetId', array('widgetId' => $this->widgetId));

// Call notify with the notify options passed in
        $this->notify($options);

$this->getLog()->debug('Delete Widget Complete');
    }

/**
     * Notify
     * @param $options
     */
    private function notify($options)
    {
        $this->getLog()->debug('Notifying upstream playlist. Notify Layout: ' . $options['notify'] . ' Notify Displays: ' . $options['notifyDisplays']);

if ($options['notify']) {
            // Notify the Layout
            $this->getStore()->update('
                UPDATE `layout` SET `status` = 3, `modifiedDT` = :modifiedDt WHERE layoutId IN (
                  SELECT `region`.layoutId
                    FROM `lkregionplaylist`
                      INNER JOIN `region`
                      ON region.regionId = `lkregionplaylist`.regionId
                   WHERE `lkregionplaylist`.playlistId = :playlistId
                )
            ', [
                'playlistId' => $this->playlistId,
                'modifiedDt' => $this->dateService->getLocalDate()
            ]);
        }

// Notify any displays (clearing their cache)
        if ($options['notifyDisplays']) {
            $this->displayFactory->getDisplayNotifyService()->collectNow()->notifyByPlaylistId($this->playlistId);
        }
    }

private function add()
    {
        $this->getLog()->debug('Adding Widget ' . $this->type . ' to PlaylistId ' . $this->playlistId);

$this->isNew = true;

$params = [
            'playlistId' => $this->playlistId,
            'ownerId' => $this->ownerId,
            'type' => $this->type,
            'duration' => $this->duration,
            'displayOrder' => $this->displayOrder,
            'useDuration' => $this->useDuration,
            'calculatedDuration' => $this->calculatedDuration
        ];

$cols = '';
        $vals = '';
        if (DBVERSION >= 139) {
            $cols = ', `createdDt`, `modifiedDt` ';
            $vals = ', :createdDt, :modifiedDt ';

$params['createdDt'] = ($this->createdDt === null) ? time() : $this->createdDt;
            $params['modifiedDt'] = time();
        }

$sql = '
            INSERT INTO `widget` (`playlistId`, `ownerId`, `type`, `duration`, `displayOrder`, `useDuration`, `calculatedDuration`' . $cols . ')
            VALUES (:playlistId, :ownerId, :type, :duration, :displayOrder, :useDuration, :calculatedDuration' . $vals . ')
        ';

$this->widgetId = $this->getStore()->insert($sql, $params);
    }

private function update()
    {
        $this->getLog()->debug('Saving Widget ' . $this->type . ' on PlaylistId ' . $this->playlistId . ' WidgetId: ' . $this->widgetId);

$params = [
            'playlistId' => $this->playlistId,
            'ownerId' => $this->ownerId,
            'type' => $this->type,
            'duration' => $this->duration,
            'widgetId' => $this->widgetId,
            'displayOrder' => $this->displayOrder,
            'useDuration' => $this->useDuration,
            'calculatedDuration' => $this->calculatedDuration
        ];

$sql = '
          UPDATE `widget` SET `playlistId` = :playlistId,
            `ownerId` = :ownerId,
            `type` = :type,
            `duration` = :duration,
            `displayOrder` = :displayOrder,
            `useDuration` = :useDuration,
            `calculatedDuration` = :calculatedDuration
        ';

if (DBVERSION >= 139) {
            $sql .= ' , modifiedDt = :modifiedDt ';

$params['modifiedDt'] = time();
        }

$sql .= '
           WHERE `widgetId` = :widgetId
        ';

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

/**
     * Link Media
     */
    private function linkMedia()
    {
        // Calculate the difference between the current assignments and the original.
        $mediaToLink = array_diff($this->mediaIds, $this->originalMediaIds);

$this->getLog()->debug('Linking %d new media to Widget %d', count($mediaToLink), $this->widgetId);

// TODO: Make this more efficient by storing the prepared SQL statement
        $sql = 'INSERT INTO `lkwidgetmedia` (widgetId, mediaId) VALUES (:widgetId, :mediaId) ON DUPLICATE KEY UPDATE mediaId = :mediaId2';

foreach ($mediaToLink as $mediaId) {

$this->getStore()->insert($sql, array(
                'widgetId' => $this->widgetId,
                'mediaId' => $mediaId,
                'mediaId2' => $mediaId
            ));
        }
    }

/**
     * Unlink Media
     */
    private function unlinkMedia()
    {
        // Calculate the difference between the current assignments and the original.
        $mediaToUnlink = array_diff($this->originalMediaIds, $this->mediaIds);

$this->getLog()->debug('Unlinking %d old media from Widget %d', count($mediaToUnlink), $this->widgetId);

if (count($mediaToUnlink) <= 0)
            return;

// Unlink any media in the collection
        $params = ['widgetId' => $this->widgetId];

$sql = 'DELETE FROM `lkwidgetmedia` WHERE widgetId = :widgetId AND mediaId IN (0';

$i = 0;
        foreach ($mediaToUnlink as $mediaId) {
            $i++;
            $sql .= ',:mediaId' . $i;
            $params['mediaId' . $i] = $mediaId;
        }

$sql .= ')';

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