filterPages.ts

export type DocsMap = {
	name: string;
	path?: string;
	type?: "page" | "category";
	pages?: DocsMap[];
};

function filterPages(docsStructure: DocsMap[] | DocsMap): DocsMap[] {
	if (Array.isArray(docsStructure)) {
		// it's an array of pages/categories
		return docsStructure
				.map(page => filterPages(page)) // recursively flatten the structure and filter to only include pages
				.flat(Infinity) as DocsMap[]; // flatten the structure to get rid of any nesting
	} else {
		// it's a single page/category, not a structure
		if (docsStructure.type === "category") {
			// it's a category
			return docsStructure.pages
					.map(page => filterPages(page)) // filter down and down until only pages are left
					.flat(Infinity) as DocsMap[]; // flatten the array
		} else {
			// it's a page
			return [docsStructure];
		}
	}
}