import { APIError } from 'payload';
/**
 * Blocks deletion of a page assigned a System Page role (homepage,
 * privacyPolicy, cookiePolicy, termsOfService). An editor deleting the privacy
 * policy or homepage by accident would break routing and compliance links; this
 * stops it with a clear error. They must unassign the role first (deliberate).
 *
 * Reads the role assignments from SiteSettings (which page holds which role).
 *
 *   hooks: { beforeDelete: [buildPreventDeleteSystemPage({ settingsSlug: 'site-settings' })] }
 */ export function buildPreventDeleteSystemPage(args = {}) {
    const settingsSlug = args.settingsSlug ?? 'site-settings';
    const roleFields = args.roleFields ?? [
        'homepage',
        'privacyPolicy',
        'cookiePolicy',
        'termsOfService'
    ];
    return async ({ id, req })=>{
        const settings = await req.payload.findGlobal({
            slug: settingsSlug,
            depth: 0
        }).catch(()=>null);
        if (!settings) {
            return;
        }
        for (const field of roleFields){
            const assigned = settings[field];
            const assignedId = assigned && typeof assigned === 'object' ? assigned.id : assigned;
            if (assignedId != null && String(assignedId) === String(id)) {
                throw new APIError(`Nie można usunąć strony przypisanej do roli systemowej "${field}". ` + `Najpierw odłącz rolę w Site Settings.`, 400);
            }
        }
    };
}

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