/**
 * Reads the site-wide inputs to title and URL composition from SiteSettings.
 *
 * Split out of metadata assembly because these are one concern with one source:
 * whatever an editor set in the panel. Metadata generation shouldn't also know
 * that the separator arrives unpadded, or that the home slug hides inside a
 * relationship — it should receive a resolved config.
 */ export async function readSiteMetaConfig({ payload, locale, settingsSlug = 'site-settings', siteNameField = 'siteName' }) {
    // depth 1 populates the homepage relationship, so its slug is available
    // without a second query.
    const settings = await payload.findGlobal({
        slug: settingsSlug,
        locale: locale,
        depth: 1
    });
    const homepage = settings.homepage && typeof settings.homepage === 'object' ? settings.homepage : null;
    // Build the per-locale home slug map. The homepage's slug is localized, so a
    // single-locale read only gives THIS language's slug. Re-read the homepage
    // with locale:'all' to get every language's slug — needed so hreflang can
    // collapse each language's home to its root.
    let homeSlug;
    if (homepage?.id) {
        try {
            const homeDoc = await payload.findByID({
                collection: 'pages',
                id: homepage.id,
                locale: 'all',
                depth: 0
            });
            const slugField = homeDoc.slug;
            if (slugField && typeof slugField === 'object') {
                const map = {};
                for (const [loc, value] of Object.entries(slugField)){
                    if (typeof value === 'string') map[loc] = value;
                }
                if (Object.keys(map).length > 0) homeSlug = map;
            } else if (typeof slugField === 'string') {
                // Non-localized slug (same in every language) — key it by current locale;
                // buildLocalizedPath tolerates a partial map. Non-localized homepage
                // slugs are rare, so this branch is a safety net, not the norm.
                homeSlug = {
                    [locale]: slugField
                };
            }
        } catch  {
        // Fall back to the single-locale slug below.
        }
    }
    // Fallback: if the 'all' read didn't yield a map, use the current locale's slug
    // for at least this locale (better than nothing).
    if (!homeSlug && typeof homepage?.slug === 'string') {
        homeSlug = {
            [locale]: homepage.slug
        };
    }
    return {
        siteName: settings[siteNameField] ?? null,
        // The panel stores '|'; titles need it padded.
        separator: settings.titleSeparator ? ` ${settings.titleSeparator} ` : undefined,
        order: settings.titleOrder ?? undefined,
        homeSlug
    };
}

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