Pulsar\Relation\Polymorphic

Complexity

Total Complexity

14

Size/Duplication

Total Lines	118
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	3

Importance

Changes

0

11 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	8	1
A	getLocalTypeKey()	0	4	1
A	getLocalIdKey()	0	4	1
A	getModelMapping()	0	4	1
A	getQuery()	0	22	3
A	initQuery()	0	4	1
A	getResults()	0	9	2
A	save()	0	7	1
A	create()	0	10	1
A	attach()	0	7	1
A	detach()	0	6	1

<?php

/**
 * @author Jared King <j@jaredtking.com>
 *
 * @see http://jaredtking.com
 *
 * @copyright 2015 Jared King
 * @license MIT
 */

namespace Pulsar\Relation;

use Pulsar\Model;
use Pulsar\Query;

final class Polymorphic extends AbstractRelation
{
    /** @var string */
    private $localTypeKey;

    /** @var string */
    private $localIdKey;

    /** @var array */
    private $modelMapping;

    public function __construct(Model $localModel, string $localTypeKey, string $localIdKey, array $modelMapping, string $foreignKey)
    {
        $this->localModel = $localModel;
        $this->localTypeKey = $localTypeKey;
        $this->localIdKey = $localIdKey;
        $this->modelMapping = $modelMapping;
        $this->foreignKey = $foreignKey;
    }

    public function getLocalTypeKey(): string
    {
        return $this->localTypeKey;
    }

    public function getLocalIdKey(): string
    {
        return $this->localIdKey;
    }

    public function getModelMapping(): array
    {
        return $this->modelMapping;
    }

    /**
     * Returns the query instance for this relation.
     */
    public function getQuery(): Query
    {
        $foreignModel = $this->modelMapping[$this->localModel->{$this->localTypeKey}];
        if (null === $foreignModel) {
            $this->empty = true;

            return new Query();
        }

        $query = new Query(new $foreignModel());

        $id = $this->localModel->{$this->localIdKey};

        if (null === $id) {
            $this->empty = true;
        }

        $query->where($this->foreignKey, $id)
            ->limit(1);

        return $query;
    }

    protected function initQuery(Query $query): Query
    {
        return $query;
    }

    public function getResults()
    {
        $query = $this->getQuery();
        if ($this->empty) {
            return null;
        }

        return $query->first();
    }

    public function save(Model $model): Model
    {
        $model->saveOrFail();
        $this->attach($model);

        return $model;
    }

    public function create(array $values = []): Model
    {
        $class = $this->modelMapping[$this->localModel->{$this->localTypeKey}];
        $model = new $class();
        $model->create($values);

        $this->attach($model);

        return $model;
    }

    /**
     * Attaches this model to an owning model.
     *
     * @param Model $model owning model
     */
    public function attach(Model $model): void
    {
        $type = array_search(get_class($model), $this->modelMapping);
        $this->localIdKey->{$this->localTypeKey} = $type;
        $this->localModel->{$this->localIdKey} = $model->{$this->foreignKey};
        $this->localModel->saveOrFail();
    }

    /**
     * Detaches this model from the owning model.
     */
    public function detach(): void
    {
        $this->localModel->{$this->localTypeKey} = null;
        $this->localModel->{$this->localIdKey} = null;
        $this->localModel->saveOrFail();
    }
}