EscolaLMS/model-fields

<?php

namespace EscolaLms\ModelFields\Traits;

use EscolaLms\ModelFields\Models\Field;
use Illuminate\Support\Collection;
use EscolaLms\ModelFields\Enum\MetaFieldTypeEnum;
use EscolaLms\ModelFields\Facades\ModelFields as ModelFieldsFacade;
use Illuminate\Support\Facades\Cache;

trait ModelFields
{
    private Collection $extraFields;

    private function getExtraAttributesValues(): array
    {
        return ModelFieldsFacade::getExtraAttributesValues($this);
    }

    public function attributesToArray()
    {
        $attributes =  parent::attributesToArray();
        $extraAttributes = $this->getExtraAttributesValues();

        return array_merge($attributes, $extraAttributes);
    }

    private function convertValueForFill($value, array $field): string
    {

        $type = $field['type'];
        switch ($type) {
            case MetaFieldTypeEnum::JSON:
                return json_encode($value);
            case MetaFieldTypeEnum::BOOLEAN:
                return $value ? "true" : "";
            case MetaFieldTypeEnum::NUMBER:
            case MetaFieldTypeEnum::VARCHAR:
            case MetaFieldTypeEnum::TEXT:
            default:
                return (string) $value;
        }
    }

    public function fill(array $attributes)
    {
        $fields = ModelFieldsFacade::getFieldsMetadata(self::class)
            ->mapWithKeys(fn ($item, $key) =>  [$item['name'] => $item])
            ->toArray();

        $this->extraFields = collect($attributes)
            ->filter(fn ($item, $key) => in_array($key, array_keys($fields)))
            ->map(fn ($item, $key) => ['name' => $key, 'value' =>  self::convertValueForFill($item, $fields[$key])]);

        return parent::fill($attributes);
    }

    public function save(array $options = [])
    {
        $extraFields = $this->extraFields ?? collect();
        unset($this->extraFields);
        $savedState = parent::save($options);
        $this->clearModelFieldsValuesCache();
        $values = $extraFields->toArray();
        $names = $extraFields->map(fn ($item) => $item['name'])->toArray();
        $this->fields()->whereIn('name', $names)->delete();
        $this->fields()->createMany($values);

        return $savedState;
    }

    public function getAttribute($key)
    {
        $attribute = parent::getAttribute($key);

        if (is_null($attribute)) {
            $fields = $this->getExtraAttributesValues();

            if (array_key_exists($key, $fields)) {
                return $fields[$key];
            }
        }

        return $attribute;
    }

    public function setAttribute($key, $value)
    {
        $this->clearModelFieldsValuesCache();

        $metaFields =  ModelFieldsFacade::getFieldsMetadata(static::class)
            ->mapWithKeys(fn ($item) =>  [$item['name'] => $item])
            ->toArray();

        if (array_key_exists($key, $metaFields)) {
            $this->extraFields = isset($this->extraFields) ? $this->extraFields->prepend(['name' => $key, 'value' => $value]) : collect([
                ['name' => $key, 'value' => $value]
            ]);

            return;
        }

        return parent::setAttribute($key, $value);
    }

    public function delete(): ?bool
    {
        $this->fields()->delete();
        return parent::delete();
    }

    public function fields()
    {
        return $this->morphMany(Field::class, 'class');
    }

    public static function firstOrCreate(array $attributes = [], array $values = [])
    {
        $modelFieldKeys = ModelFieldsFacade::getFieldsMetadata(static::class)->pluck('name')->toArray();
        $baseAttributes = array_diff_key($attributes, array_flip($modelFieldKeys));
        $additionalAttributes = array_diff_key($attributes, $baseAttributes);

        $query = parent::query()->where($baseAttributes);

        if ($instance = $query->first()) {
            foreach ($additionalAttributes as $key => $value) {
                $query = $query->whereHas('fields', function ($query) use ($key, $value){
                    return $query->where([
                        ['name', '=', $key],
                        ['value', '=', $value],
                    ]);
                });
            }

            if ($query->exists()) {
                return $instance;
            }
        }

        return parent::query()->create(array_merge($attributes, $values));
    }

    private function clearModelFieldsValuesCache(): void
    {
        if ($this->exists) {
            Cache::flush();
        }
    }
}