/** Which part comes first in a composed title. */ /**
 * Composes a full document title from a page title and the site name.
 *
 * - both, page-first:  "About Us | Acme Inc"
 * - both, site-first:  "Acme Inc | About Us"
 * - page only:         "About Us"
 * - site only:         "Acme Inc"
 * - neither:           ""
 *
 * Pure function — no dependency on Payload or request state.
 */ export function composeTitle({ pageTitle, siteName, separator = ' | ', order = 'page-first' }) {
    const page = pageTitle?.trim();
    const site = siteName?.trim();
    if (page && site) {
        // Dedup: if the page title already ends with the site name (an editor wrote
        // "Budowa auta – RCC" into meta.title), don't append it again → avoid
        // "Budowa auta – RCC – RCC". Match the site name at the end, with or without
        // the separator before it.
        const sep = separator.trim();
        if (page === site || page.endsWith(`${sep} ${site}`) || page.endsWith(` ${site}`)) {
            return page;
        }
        return order === 'site-first' ? `${site}${separator}${page}` : `${page}${separator}${site}`;
    }
    return page || site || '';
}

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