import { isArray, ensureStartingSlash, removeExtention } from '../utils';
export function isSideBarConfig(sidebar) {
    return sidebar === false || sidebar === 'auto' || isArray(sidebar);
}
export function isSideBarGroup(item) {
    return item.children !== undefined;
}
export function isSideBarEmpty(sidebar) {
    return isArray(sidebar) ? sidebar.length === 0 : !sidebar;
}
/**
 * Get the `SideBarConfig` from sidebar option. This method will ensure to get
 * correct sidebar config from `MultiSideBarConfig` with various path
 * combinations such as matching `guide/` and `/guide/`. If no matching config
 * was found, it will return `auto` as a fallback.
 */
export function getSideBarConfig(sidebar, path) {
    if (isSideBarConfig(sidebar)) {
        return sidebar;
    }
    path = ensureStartingSlash(path);
    for (const dir in sidebar) {
        // make sure the multi sidebar key starts with slash too
        if (path.startsWith(ensureStartingSlash(dir))) {
            return sidebar[dir];
        }
    }
    return 'auto';
}
/**
 * Get flat sidebar links from the sidebar items. This method is useful for
 * creating the "next and prev link" feature. It will ignore any items that
 * don't have `link` property and removes `.md` or `.html` extension if a
 * link contains it.
 */
export function getFlatSideBarLinks(sidebar) {
    return sidebar.reduce((links, item) => {
        if (item.link) {
            links.push({ text: item.text, link: removeExtention(item.link) });
        }
        if (isSideBarGroup(item)) {
            links = [...links, ...getFlatSideBarLinks(item.children)];
        }
        return links;
    }, []);
}