Expand on Eloquent's attribute handling for camel-cased properties on snake-cased fields, and enum mutations

AttributeCamelCase.php

<?php

namespace App\Models\Entities;

use Str;

trait AttributeCamelCase
{
    /**
     * @param string $key
     * @return mixed
     */
    public function getAttribute($key)
    {
        return array_key_exists($key, $this->relations) || method_exists($this, $key) ? parent::getAttribute($key)
            : parent::getAttribute(Str::snake($key));
    }

    /**
     * @param string $key
     * @param mixed $value
     * @return mixed
     */
    public function setAttribute($key, $value)
    {
        return parent::setAttribute(Str::snake($key), $value);
    }
}

AttributeEnum.php

<?php

namespace App\Models\Entities;

use Str;

trait AttributeEnum
{
    /**
     * @param string $key
     * @return array|null
     */
    public function enumOptions(string $key): ?array
    {
        $const = static::class.'::'.strtoupper(Str::snake($key));

        return defined($const) && is_array($options = constant($const)) ? $options : null;
    }

    /**
     * @param string $key
     * @param mixed $value
     * @return mixed
     */
    public function enumMutator(string $key, $value)
    {
        $options = (array)$this->enumOptions($key);
        $name = array_search($value, $options);

        return $name ?: $value;
    }

    /**
     * @inheritDoc
     */
    public function hasGetMutator($key)
    {
        return parent::hasGetMutator($key) || !is_null($this->enumOptions($key));
    }

    /**
     * @inheritDoc
     */
    protected function mutateAttribute($key, $value)
    {
        return parent::hasGetMutator($key) ? parent::mutateAttribute($key, $value) : $this->enumMutator($key, $value);
    }

    /**
     * @inheritDoc
     */
    public function attributesToArray()
    {
        return collect(parent::attributesToArray())->map(function ($value, string $key) {
            return $this->hasGetMutator($key) ? $this->enumMutator($key, $value) : $value;
        })->toArray();
    }
}

Model.php

<?php

namespace App\Models\Entities;

use Illuminate\Database\Eloquent\Model as BaseModel;
use Illuminate\Database\Eloquent\Factories\HasFactory;

abstract class Model extends BaseModel
{
    use HasFactory, AttributeCamelCase, AttributeEnum;

    /**
     * @var bool
     */
    public $timestamps = false;
}