BookStack/app/Entities/Entity.php

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<?php namespace BookStack\Entities;
use BookStack\Actions\Activity;
use BookStack\Actions\Comment;
use BookStack\Actions\Tag;
use BookStack\Actions\View;
use BookStack\Auth\Permissions\EntityPermission;
use BookStack\Auth\Permissions\JointPermission;
use BookStack\Facades\Permissions;
use BookStack\Ownable;
use Carbon\Carbon;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Database\Eloquent\Relations\MorphMany;
/**
* Class Entity
* The base class for book-like items such as pages, chapters & books.
* This is not a database model in itself but extended.
*
* @property int $id
* @property string $name
* @property string $slug
* @property Carbon $created_at
* @property Carbon $updated_at
* @property int $created_by
* @property int $updated_by
* @property boolean $restricted
* @property Collection $tags
* @method static Entity|Builder visible()
* @method static Entity|Builder hasPermission(string $permission)
* @method static Builder withLastView()
* @method static Builder withViewCount()
*
* @package BookStack\Entities
*/
class Entity extends Ownable
{
/**
* @var string - Name of property where the main text content is found
*/
public $textField = 'description';
/**
* @var float - Multiplier for search indexing.
*/
public $searchFactor = 1.0;
/**
* Get the entities that are visible to the current user.
*/
public function scopeVisible(Builder $query)
{
return $this->scopeHasPermission($query, 'view');
}
/**
* Scope the query to those entities that the current user has the given permission for.
*/
public function scopeHasPermission(Builder $query, string $permission)
{
return Permissions::restrictEntityQuery($query, $permission);
}
/**
* Query scope to get the last view from the current user.
*/
public function scopeWithLastView(Builder $query)
{
$viewedAtQuery = View::query()->select('updated_at')
->whereColumn('viewable_id', '=', $this->getTable() . '.id')
->where('viewable_type', '=', $this->getMorphClass())
->where('user_id', '=', user()->id)
->take(1);
return $query->addSelect(['last_viewed_at' => $viewedAtQuery]);
}
/**
* Query scope to get the total view count of the entities.
*/
public function scopeWithViewCount(Builder $query)
{
$viewCountQuery = View::query()->selectRaw('SUM(views) as view_count')
->whereColumn('viewable_id', '=', $this->getTable() . '.id')
->where('viewable_type', '=', $this->getMorphClass())->take(1);
$query->addSelect(['view_count' => $viewCountQuery]);
}
/**
* Compares this entity to another given entity.
* Matches by comparing class and id.
* @param $entity
* @return bool
*/
public function matches($entity)
{
return [get_class($this), $this->id] === [get_class($entity), $entity->id];
}
/**
* Checks if an entity matches or contains another given entity.
* @param Entity $entity
* @return bool
*/
public function matchesOrContains(Entity $entity)
{
$matches = [get_class($this), $this->id] === [get_class($entity), $entity->id];
if ($matches) {
return true;
}
if (($entity->isA('chapter') || $entity->isA('page')) && $this->isA('book')) {
return $entity->book_id === $this->id;
}
if ($entity->isA('page') && $this->isA('chapter')) {
return $entity->chapter_id === $this->id;
}
return false;
}
/**
* Gets the activity objects for this entity.
* @return MorphMany
*/
public function activity()
{
return $this->morphMany(Activity::class, 'entity')
->orderBy('created_at', 'desc');
}
/**
* Get View objects for this entity.
*/
public function views()
{
return $this->morphMany(View::class, 'viewable');
}
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/**
* Get the Tag models that have been user assigned to this entity.
* @return MorphMany
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*/
public function tags()
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{
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return $this->morphMany(Tag::class, 'entity')->orderBy('order', 'asc');
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}
/**
* Get the comments for an entity
* @param bool $orderByCreated
* @return MorphMany
*/
public function comments($orderByCreated = true)
{
$query = $this->morphMany(Comment::class, 'entity');
return $orderByCreated ? $query->orderBy('created_at', 'asc') : $query;
}
/**
* Get the related search terms.
* @return MorphMany
*/
public function searchTerms()
{
return $this->morphMany(SearchTerm::class, 'entity');
}
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/**
* Get this entities restrictions.
*/
public function permissions()
{
return $this->morphMany(EntityPermission::class, 'restrictable');
}
/**
* Check if this entity has a specific restriction set against it.
* @param $role_id
* @param $action
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* @return bool
*/
public function hasRestriction($role_id, $action)
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{
return $this->permissions()->where('role_id', '=', $role_id)
->where('action', '=', $action)->count() > 0;
}
/**
* Get the entity jointPermissions this is connected to.
* @return MorphMany
*/
public function jointPermissions()
{
return $this->morphMany(JointPermission::class, 'entity');
}
/**
* Check if this instance or class is a certain type of entity.
* Examples of $type are 'page', 'book', 'chapter'
*/
public static function isA(string $type): bool
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{
return static::getType() === strtolower($type);
}
/**
* Get entity type.
* @return mixed
*/
public static function getType()
{
return strtolower(static::getClassName());
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}
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/**
* Get an instance of an entity of the given type.
* @param $type
* @return Entity
*/
public static function getEntityInstance($type)
{
$types = ['Page', 'Book', 'Chapter', 'Bookshelf'];
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$className = str_replace([' ', '-', '_'], '', ucwords($type));
if (!in_array($className, $types)) {
return null;
}
return app('BookStack\\Entities\\' . $className);
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}
/**
* Gets a limited-length version of the entities name.
*/
public function getShortName(int $length = 25): string
{
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if (mb_strlen($this->name) <= $length) {
return $this->name;
}
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return mb_substr($this->name, 0, $length - 3) . '...';
}
/**
* Get the body text of this entity.
* @return mixed
*/
public function getText()
{
return $this->{$this->textField};
}
/**
* Get an excerpt of this entity's descriptive content to the specified length.
* @param int $length
* @return mixed
*/
public function getExcerpt(int $length = 100)
{
$text = $this->getText();
if (mb_strlen($text) > $length) {
$text = mb_substr($text, 0, $length-3) . '...';
}
return trim($text);
}
/**
* Get the url of this entity
* @param $path
* @return string
*/
public function getUrl($path = '/')
{
return $path;
}
/**
* Rebuild the permissions for this entity.
*/
public function rebuildPermissions()
{
/** @noinspection PhpUnhandledExceptionInspection */
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Permissions::buildJointPermissionsForEntity(clone $this);
}
/**
* Index the current entity for search
*/
public function indexForSearch()
{
$searchService = app()->make(SearchService::class);
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$searchService->indexEntity(clone $this);
}
/**
* Generate and set a new URL slug for this model.
*/
public function refreshSlug(): string
{
$generator = new SlugGenerator($this);
$this->slug = $generator->generate();
return $this->slug;
}
}