112 lines
3.2 KiB
TypeScript
112 lines
3.2 KiB
TypeScript
// This file is a temporary replacement for legacy contentlayer's computeFields + default fields values
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import { remark } from "remark";
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import stripMarkdown, { Options } from "strip-markdown";
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import { defaultConfig as siteConfig } from '@portaljs/core'
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// TODO return type
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const sluggify = (urlPath: string) => {
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return urlPath.replace(/^(.+?\/)*/, "");
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};
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const computeFields = async ({
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frontMatter,
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urlPath,
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filePath,
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source,
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}: {
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frontMatter: Record<string, any>;
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urlPath: string;
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filePath: string;
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source: string;
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}) => {
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// Fields with corresponding config options
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// TODO see _app.tsx
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const showEditLink =
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frontMatter.showEditLink ?? siteConfig.showEditLink ?? false;
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// TODO take config into accout
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const showLinkPreviews =
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frontMatter.showLinkPreviews ?? siteConfig.showLinkPreviews ?? false;
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const showToc = frontMatter.showToc ?? siteConfig.showToc ?? false;
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const showSidebar =
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frontMatter.showSidebar ?? siteConfig.showSidebar ?? false;
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// Computed fields
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// const title = frontMatter.title ?? (await extractTitle(source));
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const title = frontMatter.title ?? null;
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const description =
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frontMatter.description ?? (await extractDescription(source));
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const date = frontMatter.date ?? frontMatter.created ?? null;
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const layout = (() => {
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if (frontMatter.layout) return frontMatter.layout;
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if (urlPath.startsWith("blog/")) return "blog";
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// if (urlPath.startsWith("docs/")) return "docs";
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return "docs"; // TODO default layout from config?
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})();
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// TODO Temporary, should probably be a column in the database
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const slug = sluggify(urlPath);
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// TODO take into accout include/exclude fields in config
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const isDraft = frontMatter.isDraft ?? false;
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return {
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...frontMatter,
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title,
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description,
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date,
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layout,
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slug,
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urlPath, // extra for blogs index page; temporary here
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isDraft,
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showEditLink,
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showLinkPreviews,
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showToc,
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showSidebar,
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};
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};
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const extractTitle = async (source: string) => {
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const heading = source.trim().match(/^#\s+(.*)/);
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if (heading) {
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const title = heading[1]
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// replace wikilink with only text value
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.replace(/\[\[([\S]*?)]]/, "$1");
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const stripTitle = await remark().use(stripMarkdown).process(title);
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return stripTitle.toString().trim();
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}
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return null;
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};
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const extractDescription = async (source: string) => {
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const content = source
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// remove commented lines
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.replace(/{\/\*.*\*\/}/g, "")
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// remove import statements
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.replace(
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/^import\s*(?:\{\s*[\w\s,\n]+\s*\})?(\s*(\w+))?\s*from\s*("|')[^"]+("|');?$/gm,
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""
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)
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// remove youtube links
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.replace(/^(https?:\/\/)?(www\.)?(youtube\.com|youtu\.?be)\/.+$/gm, "")
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// replace wikilinks with only text
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.replace(/([^!])\[\[(\S*?)\]]/g, "$1$2")
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// remove wikilink images
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.replace(/!\[[\S]*?]]/g, "");
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// remove markdown formatting
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const stripped = await remark()
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.use(stripMarkdown, {
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remove: ["heading", "blockquote", "list", "image", "html", "code"],
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} as Options)
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.process(content);
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if (stripped.value) {
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const description: string = stripped.value.toString().slice(0, 200);
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return description + "...";
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}
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return null;
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};
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export default computeFields;
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