krafthaus/bauhaus

<?php

namespace KraftHaus\Bauhaus\Field;

/**
 * This file is part of the KraftHaus Bauhaus package.
 *
 * (c) KraftHaus <hello@krafthaus.nl>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

use KraftHaus\Bauhaus\Field\BaseField;
use Illuminate\Support\Facades\View;
use Illuminate\Support\Str;

/**
 * Class BelongsToManyField
 * @package KraftHaus\Bauhaus\Field
 */
class BelongsToManyField extends RelationField
{

    /**
     * Render the field.
     *
     * @access public
     * @return mixed|string
     */
    public function render()
    {
        if ($this->getDisplayField() === null) {
            throw new \InvalidArgumentException(sprintf('Please provide a display field for the `%s` relation.', $this->getName()));
        }

        switch ($this->getContext()) {
            case BaseField::CONTEXT_LIST:
                $baseModel    = $this->getAdmin()->getModel();
                $baseModel    = new $baseModel;

                $relatedModel = $baseModel->{$this->getName()}()->getRelated();
                $primaryKey   = $relatedModel->getKeyName();

                $values = [];
                foreach ($this->getValue() as $item) {
                    $values[$item->{$primaryKey}] = $item->{$this->getDisplayField()};
                }

                return implode(', ', $values);

                break;
            case BaseField::CONTEXT_FORM:
                $baseModel  = $this->getAdmin()->getModel();
                $baseModel  = new $baseModel;
                $primaryKey = $baseModel->getKeyName();

                $relatedModel = $baseModel->{$this->getName()}()->getRelated();

                $items = [];
                foreach ($relatedModel::all() as $item) {
                    $items[$item->{$primaryKey}] = $item->{$this->getDisplayField()};
                }

                $id = $this->getAdmin()->getFormBuilder()->getIdentifier();
                $values = [];

                if ($id !== null) {
                    foreach ($baseModel::find($id)->{$relatedModel->getTable()} as $item) {
                        $values[$item->{$primaryKey}] = $item->{$primaryKey};
                    }
                }

                return View::make('krafthaus/bauhaus::models.fields._belongs_to_many')
                    ->with('field',  $this)
                    ->with('items',  $items)
                    ->with('values', $values);
        }
    }

    public function postUpdate($input)
    {
        $model = $this->getAdmin()->getModel();
        $model = $model::find($this->getAdmin()->getFormBuilder()->getIdentifier());

        $pivot = $this->getName();
        if(isset($input[$pivot])) {
            $model->{$pivot}()->sync($input[$pivot]);
        }
    }

    /**
     * Override the getAttributes method to add the multiple attribute.
     *
     * @access public
     * @return array
     */
    public function getAttributes()
    {
        $this->attribute('multiple', true);
        return $this->attributes;
    }

}