mein-sterntours/app/Services/MailDirService.php

<?php

namespace App\Services;

use App\Models\Airline;
use App\Models\CMSContent;
use App\Models\Insurance;
use App\Models\TravelCompany;

class MailDirService
{
    private static array $outputDirs = [];

    public static function setOutputDir(string $dir, string $subdir): void
    {
        self::$outputDirs[$dir][] = $subdir;
    }

    /**
     * @return string[]
     */
    public static function getCustomerMailDirs(): \Illuminate\Database\Eloquent\Collection
    {
        return CMSContent::where('identifier', '=', 'customer-mail-dirs')->get()->sortBy('pos');
    }

    public static function getCustomerMailDir(int $id): ?CMSContent
    {
        return CMSContent::where('identifier', '=', 'customer-mail-dirs')->where('pos', '=', $id)->first();
    }

    public static function getCustomerMailName(CMSContent $mailDir, int $mailDirId): string
    {
        $model = self::resolveModel($mailDir, $mailDirId);

        if ($model === null) {
            return '';
        }

        if ($mailDir->getArrayContent('model') === 'TravelCountry') {
            return $model->mail_dir_name ?? '';
        }

        return $model->name ?? '';
    }

    /**
     * @return array<string>|string
     */
    public static function getCustomerMailEmails(CMSContent $mailDir, int $mailDirId): array|string
    {
        $model = self::resolveModel($mailDir, $mailDirId);

        if ($model === null) {
            // Default: emails come directly from CMSContent
            return $mailDir->getArrayContent('emails') ?? [];
        }

        return $model->contact_emails ?? [];
    }

    /**
     * Returns subdirs from a mail collection that were not already in the output.
     *
     * @param  \Illuminate\Database\Eloquent\Collection  $mails  Collection of CustomerMail or LeadMail
     * @return string[]
     */
    public static function getMailDirsNotInOutput(iterable $mails, string $dir): array
    {
        $processed = self::$outputDirs[$dir] ?? [];
        $result = [];

        foreach ($mails as $mail) {
            if (!in_array($mail->subdir, $processed, true)) {
                $result[] = $mail->subdir;
            }
        }

        return $result;
    }

    private static function resolveModel(CMSContent $mailDir, int $mailDirId): mixed
    {
        return match ($mailDir->getArrayContent('model')) {
            'TravelCountry' => \App\Models\Sym\TravelCountry::find($mailDirId),
            'Airline'       => Airline::find($mailDirId),
            'Insurance'     => Insurance::find($mailDirId),
            'TravelCompany' => TravelCompany::find($mailDirId),
            default         => null,
        };
    }
}