<?php

namespace App\Classes\Traits;

use App\Classes\MetadataManager;

trait ManagesMetadata
{
    private array $metadataManagers = [];

    /**
     * Return an instance of metadata manager for specified filename
     */
    public function metadata(?string $filename = 'index'): MetadataManager
    {
        return $this->registerMetadataManager($filename);
    }

    /**
     * Register a metadata manager for specified filename
     */
    private function registerMetadataManager(string $filename): MetadataManager
    {
        $filename = $this->getFilenameInDataBundle($filename, '.json');

        if (!array_key_exists($filename, $this->metadataManagers)) {
            $this->metadataManagers[$filename] = new MetadataManager($filename, $this);
        }

        return $this->metadataManagers[$filename];
    }

    /**
     * Load all metadata files at once
     */
    private function loadMetadata()
    {
        foreach ($this->metadataManagers as $manager) {
            $manager->load();
        }
    }

    /**
     * Save all metadata files that needs to be
     */
    private function saveMetadata()
    {
        foreach ($this->metadataManagers as $manager) {
            $manager->save();
        }
    }
}