utils.js

import fs from 'fs'
import matter from 'gray-matter'
import { serialize } from 'next-mdx-remote/serialize'
import path from 'path'

// const fs = require('fs');
export function getDocBySlug(slug, locale = 'en') {
	// console.log('slug---------------', slug);
	const docsDirectory = path.join(process.cwd(), `/mdx/${locale}`)
	// console.log('docsDirectory', docsDirectory)
	const realSlug = slug.replace(/\.mdx$/, '')
	// console.log('realSlug', realSlug);
	const fullPath = path.join(docsDirectory, `${realSlug}.md`)
	// console.log('fullPath', fullPath)
	const fileContents = fs.readFileSync(fullPath, 'utf8')
	const { content, data } = matter(fileContents)

	return { slug: realSlug, meta: data, content }
}

export function formatDirectory(fileNames) {
	const formatArr = fileNames.slice(1)

	let directory = []

	formatArr.map((item, index) =>
		directory.push({
			text: item.substr(0, item.length - 3),
			status: false,
			main: false,
		})
	)
	directory = directory.filter(
		(item) =>
			item.text !== 'TOC' &&
			item.text !== 'README' &&
			item.text !== 'SUMMARY'
	)

	directory.unshift({
		text: '1.0-foreword',
		status: true,
		main: true,
	})
	directory[1] = {
		text: '1.0-Before Layer2',
		status: false,
		main: true,
	}
	directory.splice(5, 0, {
		text: '2.0-Layer2 Evolution course',
		status: false,
		main: true,
	})
	directory.splice(10, 0, {
		text: '3.0-Rollup Principle',
		status: false,
		main: true,
	})
	directory.splice(18, 0, {
		text: '4.0-Layer2 Future And Prospect',
		status: false,
		main: true,
	})
	directory[directory.length - 1] = {
		...directory[directory.length - 1],
		main: true,
	}

	// console.log('directory', directory);

	return directory
}

export function getAllPosts() {
	const markdownDir = path.join(process.cwd(), '/mdx/zh')

	const fileNames = fs.readdirSync(markdownDir)
	const posts = fileNames.map((fileName) => {
		const slug = fileName.replace(/\.mdx$/, '')
		const fullPath = path.join(markdownDir, fileName)
		const fileContents = fs.readFileSync(fullPath, 'utf8')
		const { data } = matter(fileContents)
		return { slug, ...data }
	})
	return posts
}

export async function getPostBySlug(slug) {
	const markdownDir = path.join(process.cwd(), '/mdx/zh')

	const fullPath = path.join(markdownDir, `${slug}.mdx`)
	const fileContents = fs.readFileSync(fullPath, 'utf8')
	const { content } = matter(fileContents)
	const mdxSource = await serialize(content)
	return { content, mdxSource }
}

export const formatChapterTitle = (text) => {
	if (Number(text && text[0]) !== NaN) {
		return text?.substr(4, text.length - 1)
	}
	return text
}