fields shortcut

index.php

<?php 
use Kirby\Cms\PageBlueprint;

class shortcutsPreset {
    static private $counter = 0;
    static private function randomSectionName() {
        self::$counter += 1;
        return 'shortcuts_preset_section_' . self::$counter;
    }
    
    static private function replace_key($arr, $oldkey, $newkey) {
        if (array_key_exists($oldkey, $arr)) {
            $keys = array_keys($arr);
            $keys[array_search($oldkey, $keys)] = $newkey;
            return array_combine($keys, $arr);
        }
        return $arr;
    }

    static public function preset($props) {
        //normalize props
        if(isset($props['fields'])) {
            $props['sections'][self::randomSectionName()] = [
                'type' => 'fields',
                'fields' => $props['fields']
            ];
            unset($props['fields']);
        }

        if(isset($props['sections'])) {
            $props['columns'][] = [
                'width' => '1/1',
                'sections' => $props['sections']
            ];
            unset($props['sections']);
        }

        if (isset($props['columns'])) {
            $props['tabs']['main']['columns'] = $props['columns'];
            unset($props['columns']);
        }
        
        foreach ($props['tabs'] as &$tab) {
            foreach ($tab['columns'] as &$column) {
                foreach ($column['sections'] as $key => &$section) {
                    if($key === 'fields' && !is_array($section['fields'])) {
                        $column['sections']['fields'] = [
                            'type' => 'fields',
                            'fields' => $column['sections']['fields']
                        ];
                        $column['sections'] = self::replace_key($column['sections'], 'fields', self::randomSectionName());
                    }                    
                }
            }
        }
        
        return $props;
    
    }
}

PageBlueprint::$presets['shortcuts'] = Closure::fromCallable(['shortcutsPreset', 'preset']);