Form.php

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<?php

namespace ILIAS\components\File\Preview;

use ILIAS\UI\Component\Input\Field\Factory;
use ILIAS\UI\Component\Input\Field\Group;
use ILIAS\UI\Component\Input\Field\Section;

class Form
{
    private \ilLanguage $language;
    private Factory $field_factory;
    private \ILIAS\Refinery\Factory $refinery;

    public function __construct(private Settings $settings)
    {
        global $DIC;
        $this->language = $DIC->language();
        $this->field_factory = $DIC->ui()->factory()->input()->field();
        $this->refinery = $DIC->refinery();
    }

    public function asFormSection(): Section
    {
        return $this->field_factory->section(
            [$this->asFormGroup()],
            $this->language->txt('preview')
        );
    }

    public function asFormGroup(): Group
    {
        $possible = $this->settings->isPreviewPossible();

        $activated = $this->field_factory
            ->checkbox(
                $this->language->txt('enable_preview'),
                $this->language->txt('enable_preview_info')
            )
            ->withDisabled(!$possible)
            ->withValue($this->settings->isPreviewEnabled())
            ->withAdditionalTransformation(
                $this->refinery->custom()->transformation(function ($v): void {
                    $this->settings->setPreviewEnabled($v);
                })
            );

        $image_size = $this->field_factory
            ->numeric(
                $this->language->txt('preview_image_size'),
                $this->language->txt('preview_image_size_info')
            )
            ->withDisabled(!$possible)
            ->withRequired(true)
            ->withValue($this->settings->getImageSize())
            ->withAdditionalTransformation(
                $this->refinery->custom()->transformation(function ($v): void {
                    $this->settings->setImageSize($v);
                })
            );

        $persisting = $this->field_factory
            ->checkbox(
                $this->language->txt('preview_persisting'),
                $this->language->txt('preview_persisting_info')
            )
            ->withDisabled(!$possible)
            ->withValue($this->settings->isPersisting())
            ->withAdditionalTransformation(
                $this->refinery->custom()->transformation(function ($v): void {
                    $this->settings->setPersisting($v);
                })
            );

        $max_previews = $this->field_factory
            ->numeric(
                $this->language->txt('max_previews_per_object'),
                $this->language->txt('max_previews_per_object_info')
            )
            ->withDisabled(!$possible)
            ->withValue($this->settings->getMaximumPreviews())
            ->withAdditionalTransformation(
                $this->refinery->custom()->transformation(function ($v): void {
                    $this->settings->setMaximumPreviews($v);
                })
            );

        $tile_previews = $this->field_factory
            ->checkbox(
                $this->language->txt('previews_for_tiles'),
                $this->language->txt('previews_for_tiles_info')
            )
            ->withDisabled(!$possible)
            ->withValue($this->settings->hasTilePreviews())
            ->withAdditionalTransformation(
                $this->refinery->custom()->transformation(function ($v): void {
                    $this->settings->setTilePreviews($v);
                })
            );

        return $this->field_factory->group(
            [
                $activated,
                $image_size,
                $max_previews,
                $persisting,
                $tile_previews
            ]
        );
    }
}