mirror of https://github.com/sveltejs/svelte
feat(site-2): Make blog logic consistent with other content (#8447)
Puru Vijay
2 years ago
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@ -0,0 +1,60 @@
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// @ts-check
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import fs from 'fs';
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import { extract_frontmatter } from '../markdown';
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const BLOG_NAME_REGEX = /^(\d{4}-\d{2}-\d{2})-(.+)\.md$/;
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const BASE = '../../site/content/blog';
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/** @returns {import('./types').BlogData} */
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export function get_blog_data(base = BASE) {
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/** @type {import('./types').BlogData} */
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const blog_posts = [];
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for (const file of fs.readdirSync(base).reverse()) {
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if (!BLOG_NAME_REGEX.test(file)) continue;
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const { date, date_formatted, slug } = get_date_and_slug(file);
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const { metadata, body } = extract_frontmatter(fs.readFileSync(`${base}/${file}`, 'utf-8'));
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blog_posts.push({
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date,
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date_formatted,
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content: body,
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description: metadata.description,
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draft: metadata.draft === 'true',
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slug,
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title: metadata.title,
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author: {
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name: metadata.author,
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url: metadata.authorURL
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}
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});
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}
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return blog_posts;
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}
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/** @param {import('./types').BlogData} blog_data */
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export function get_blog_list(blog_data) {
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return blog_data.map(({ slug, date, title, description, draft }) => ({
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slug,
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date,
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title,
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description,
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draft
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}));
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}
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/** @param {string} filename */
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function get_date_and_slug(filename) {
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const match = BLOG_NAME_REGEX.exec(filename);
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if (!match) throw new Error(`Invalid filename for blog: '${filename}'`);
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const [, date, slug] = match;
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const [y, m, d] = date.split('-');
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const date_formatted = `${months[+m - 1]} ${+d} ${y}`;
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return { date, date_formatted, slug };
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}
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const months = 'Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split(' ');
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@ -1,75 +1,96 @@
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import fs from 'fs';
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import { extract_frontmatter } from '../markdown';
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import { transform } from './marked';
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const base = '../../site/content/blog';
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// @ts-check
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import { createShikiHighlighter } from 'shiki-twoslash';
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import { SHIKI_LANGUAGE_MAP, escape, transform } from '../markdown';
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/**
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* @returns {import('./types').BlogPostSummary[]}
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* @param {import('./types').BlogData} blog_data
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* @param {string} slug
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*/
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export function get_index() {
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return fs
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.readdirSync(base)
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.reverse()
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.map((file) => {
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if (!file.endsWith('.md')) return;
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export async function get_processed_blog_post(blog_data, slug) {
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const post = blog_data.find((post) => post.slug === slug);
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const { date, slug } = get_date_and_slug(file);
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if (!post) return null;
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const content = fs.readFileSync(`${base}/${file}`, 'utf-8');
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const { metadata } = extract_frontmatter(content);
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const highlighter = await createShikiHighlighter({ theme: 'css-variables' });
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return {
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slug,
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date,
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title: metadata.title,
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description: metadata.description,
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draft: !!metadata.draft
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};
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});
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}
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/**
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* @param {string} slug
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* @returns {import('./types').BlogPost}
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...post,
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content: transform(post.content, {
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/**
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* @param {string} html
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*/
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export function get_post(slug) {
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for (const file of fs.readdirSync(`${base}`)) {
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if (!file.endsWith('.md')) continue;
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if (file.slice(11, -3) !== slug) continue;
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heading(html) {
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const title = html
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.replace(/<\/?code>/g, '')
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.replace(/"/g, '"')
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.replace(/</g, '<')
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.replace(/>/g, '>');
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const { date, date_formatted } = get_date_and_slug(file);
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return title;
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},
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code: (source, language) => {
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let html = '';
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const content = fs.readFileSync(`${base}/${file}`, 'utf-8');
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const { metadata, body } = extract_frontmatter(content);
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source = source
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.replace(/^([\-\+])?((?: )+)/gm, (match, prefix = '', spaces) => {
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if (prefix && language !== 'diff') return match;
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return {
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date,
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date_formatted,
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title: metadata.title,
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description: metadata.description,
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author: {
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name: metadata.author,
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url: metadata.authorURL
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},
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draft: !!metadata.draft,
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content: transform(body)
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};
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// for no good reason at all, marked replaces tabs with spaces
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let tabs = '';
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for (let i = 0; i < spaces.length; i += 4) {
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tabs += ' ';
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}
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}
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return prefix + tabs;
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})
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.replace(/\*\\\//g, '*/');
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/** @param {string} filename */
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function get_date_and_slug(filename) {
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const match = /^(\d{4}-\d{2}-\d{2})-(.+)\.md$/.exec(filename);
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if (!match) throw new Error(`Invalid filename for blog: '${filename}'`);
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if (language === 'diff') {
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const lines = source.split('\n').map((content) => {
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let type = null;
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if (/^[\+\-]/.test(content)) {
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type = content[0] === '+' ? 'inserted' : 'deleted';
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content = content.slice(1);
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}
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const [, date, slug] = match;
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const [y, m, d] = date.split('-');
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const date_formatted = `${months[+m - 1]} ${+d} ${y}`;
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return {
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type,
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content: escape(content)
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};
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});
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return { date, date_formatted, slug };
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}
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html = `<pre class="language-diff"><code>${lines
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.map((line) => {
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if (line.type) return `<span class="${line.type}">${line.content}\n</span>`;
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return line.content + '\n';
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})
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.join('')}</code></pre>`;
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} else {
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html = highlighter.codeToHtml(source, { lang: SHIKI_LANGUAGE_MAP[language] });
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const months = 'Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split(' ');
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html = html
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.replace(
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/^(\s+)<span class="token comment">([\s\S]+?)<\/span>\n/gm,
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(match, intro_whitespace, content) => {
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// we use some CSS trickery to make comments break onto multiple lines while preserving indentation
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const lines = (intro_whitespace + content).split('\n');
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return lines
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.map((line) => {
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const match = /^(\s*)(.*)/.exec(line);
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const indent = (match[1] ?? '').replace(/\t/g, ' ').length;
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function format_date(date) {}
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return `<span class="token comment wrapped" style="--indent: ${indent}ch">${
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line ?? ''
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}</span>`;
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})
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.join('');
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}
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)
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.replace(/\/\*…\*\//g, '…');
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}
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return html;
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},
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codespan: (text) => '<code>' + text + '</code>'
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})
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};
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}
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@ -1,187 +0,0 @@
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import PrismJS from 'prismjs';
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import 'prismjs/components/prism-bash.js';
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import 'prismjs/components/prism-diff.js';
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import 'prismjs/components/prism-typescript.js';
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import 'prism-svelte';
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import { marked } from 'marked';
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const escape_test = /[&<>"']/;
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const escape_replace = /[&<>"']/g;
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const escape_test_no_encode = /[<>"']|&(?!#?\w+;)/;
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const escape_replace_no_encode = /[<>"']|&(?!#?\w+;)/g;
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const escape_replacements = {
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'&': '&',
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'<': '<',
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'>': '>',
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'"': '"',
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"'": '''
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};
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const get_escape_replacement = (ch) => escape_replacements[ch];
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/**
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* @param {string} html
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* @param {boolean} [encode]
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*/
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export function escape(html, encode) {
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if (encode) {
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if (escape_test.test(html)) {
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return html.replace(escape_replace, get_escape_replacement);
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}
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} else {
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if (escape_test_no_encode.test(html)) {
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return html.replace(escape_replace_no_encode, get_escape_replacement);
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}
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}
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return html;
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}
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const prism_languages = {
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bash: 'bash',
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env: 'bash',
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html: 'markup',
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svelte: 'svelte',
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js: 'javascript',
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css: 'css',
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diff: 'diff',
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ts: 'typescript',
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'': ''
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};
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/** @type {Partial<import('marked').Renderer>} */
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const default_renderer = {
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code(code, infostring, escaped) {
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const lang = (infostring || '').match(/\S*/)[0];
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const prism_language = prism_languages[lang];
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if (prism_language) {
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const highlighted = PrismJS.highlight(code, PrismJS.languages[prism_language], lang);
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return `<div class="code-block"><pre class="language-${prism_language}"><code>${highlighted}</code></pre></div>`;
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}
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return (
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'<div class="code-block"><pre><code>' +
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(escaped ? code : escape(code, true)) +
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'</code></pre></div>'
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);
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},
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blockquote(quote) {
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return '<blockquote>\n' + quote + '</blockquote>\n';
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},
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html(html) {
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return html;
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},
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heading(text, level) {
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return '<h' + level + '>' + text + '</h' + level + '>\n';
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},
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hr() {
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return '<hr>\n';
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},
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list(body, ordered, start) {
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const type = ordered ? 'ol' : 'ul',
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startatt = ordered && start !== 1 ? ' start="' + start + '"' : '';
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return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
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},
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listitem(text) {
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return '<li>' + text + '</li>\n';
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},
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checkbox(checked) {
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return '<input ' + (checked ? 'checked="" ' : '') + 'disabled="" type="checkbox"' + '' + '> ';
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},
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paragraph(text) {
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return '<p>' + text + '</p>\n';
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},
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table(header, body) {
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if (body) body = '<tbody>' + body + '</tbody>';
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return '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n';
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},
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tablerow(content) {
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return '<tr>\n' + content + '</tr>\n';
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},
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tablecell(content, flags) {
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const type = flags.header ? 'th' : 'td';
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const tag = flags.align ? '<' + type + ' align="' + flags.align + '">' : '<' + type + '>';
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return tag + content + '</' + type + '>\n';
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},
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// span level renderer
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strong(text) {
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return '<strong>' + text + '</strong>';
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},
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em(text) {
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return '<em>' + text + '</em>';
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},
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codespan(text) {
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return '<code>' + text + '</code>';
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},
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br() {
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return '<br>';
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},
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del(text) {
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return '<del>' + text + '</del>';
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},
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link(href, title, text) {
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if (href === null) {
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return text;
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}
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let out = '<a href="' + escape(href) + '"';
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if (title) {
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out += ' title="' + title + '"';
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}
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out += '>' + text + '</a>';
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return out;
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},
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image(href, title, text) {
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if (href === null) {
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return text;
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}
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let out = '<img src="' + href + '" alt="' + text + '"';
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if (title) {
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out += ' title="' + title + '"';
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}
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out += '>';
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return out;
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},
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text(text) {
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return text;
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}
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};
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/**
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* @param {string} markdown
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* @param {Partial<import('marked').Renderer>} renderer
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*/
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export function transform(markdown, renderer = {}) {
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marked.use({
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renderer: {
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// we have to jump through these hoops because of marked's API design choices —
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// options are global, and merged in confusing ways. You can't do e.g.
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// `new Marked(options).parse(markdown)`
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...default_renderer,
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...renderer
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}
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});
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return marked(markdown);
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}
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@ -1,9 +1,9 @@
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import { get_index } from '$lib/server/blog';
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import { get_blog_data, get_blog_list } from '$lib/server/blog/get-blog-data';
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export const prerender = true;
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export async function load() {
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return {
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posts: get_index()
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posts: get_blog_list(get_blog_data())
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};
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}
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