<?php

namespace App\Traits;


use Illuminate\Database\Eloquent\Relations\Relation;

trait HasManyThroughable
{
    /**
     * This trait allows for a HasMany relationship through a polymorphic intermediate relationship.
     *
     * @param string      $related      The related class
     * @param string      $through      The intermediate class
     * @param string      $morphName    The name of the morphed entity
     * @param null|string $relationship The intermediate relationship
     * @param null|string $morphId
     * @param null|string $morphType
     * @param null|string $morphTypeMap
     *
     * @return mixed
     */
    public function hasManyThroughable($related, $through, $morphName, $relationship = null, $morphId = null, $morphType = null, $morphTypeMap = null)
    {
        $through = new $through();

        $morphId = $morphId ?: $morphName . '_id';

        $morphType = $morphType ?: $morphName . '_type';

        if ($morphTypeMap === null) {
            if (! $morphTypeMap = array_search(get_class($through), Relation::morphMap(), false)) {
                $morphTypeMap = get_class($through);
            }
        }

        $relationship = $relationship ?: camel_case(str_plural(class_basename($through)));

        $throughIds = $this->$relationship->pluck($through->getKeyName());


        return $related::where($morphType, $morphTypeMap)->whereIn($morphId, $throughIds)->get();
    }
}