GitFOSS

// std
import { cwd } from "process";
import { join, resolve } from "path";
import { readFile } from "fs/promises";
// 3rd-part
import matter from "gray-matter";
import tocGenerator from "markdown-toc";
// app
import type { Page } from "../../types";
import * as paths from "../../../paths";

export async function getDocFileContent(
  sectionSlug: string,
  pageSlug: string,
  ext: string
): Promise<Page> {
  try {
    const filePath = resolve(
      join(paths.ROOT_FOLDER, "docs", sectionSlug, `${pageSlug}.${ext}`)
    );

    const content = await readFile(filePath, { encoding: "utf-8" });
    const ymlMatter = matter(content, { language: "yaml" });
    const toc = tocGenerator(ymlMatter.content).json as {
      content: string;
      slug: string;
      lvl: number;
    }[];
    return {
      slug: pageSlug,
      content: ymlMatter.content as string,
      tableOfContent: toc.map((entry) => ({
        title: entry.content,
        targetAnchor: entry.slug,
        depth: entry.lvl,
      })),
      metas: ymlMatter.data,
    };
  } catch (err) {
    const workingDir = cwd();
    const error = err as Error;
    return {
      slug: pageSlug,
      content: `# ${
        error.name || "InternalServerError"
      }\n\n> ${error.message.replace(`${workingDir}/docs`, "")}`,
      tableOfContent: [],
      metas: {
        error,
      },
    };
  }
}