import { QuartzTransformerPlugin } from "../types" import { CanonicalSlug, RelativeURL, _stripSlashes, canonicalizeServer, joinSegments, pathToRoot, resolveRelative, splitAnchor, transformInternalLink, } from "../../path" import path from "path" import { visit } from "unist-util-visit" import isAbsoluteUrl from "is-absolute-url" interface Options { /** How to resolve Markdown paths */ markdownLinkResolution: "absolute" | "relative" | "shortest" /** Strips folders from a link so that it looks nice */ prettyLinks: boolean } const defaultOptions: Options = { markdownLinkResolution: "absolute", prettyLinks: true, } export const CrawlLinks: QuartzTransformerPlugin | undefined> = (userOpts) => { const opts = { ...defaultOptions, ...userOpts } return { name: "LinkProcessing", htmlPlugins(ctx) { return [ () => { return (tree, file) => { const curSlug = canonicalizeServer(file.data.slug!) const transformLink = (target: string): RelativeURL => { const targetSlug = _stripSlashes(transformInternalLink(target).slice(".".length)) let [targetCanonical, targetAnchor] = splitAnchor(targetSlug) if (opts.markdownLinkResolution === "relative") { return targetSlug as RelativeURL } else if (opts.markdownLinkResolution === "shortest") { // if the file name is unique, then it's just the filename const matchingFileNames = ctx.allSlugs.filter((slug) => { const parts = slug.split(path.posix.sep) const fileName = parts.at(-1) return targetCanonical === fileName }) // only match, just use it if (matchingFileNames.length === 1) { const targetSlug = canonicalizeServer(matchingFileNames[0]) return (resolveRelative(curSlug, targetSlug) + targetAnchor) as RelativeURL } // if it's not unique, then it's the absolute path from the vault root // (fall-through case) } // treat as absolute return joinSegments(pathToRoot(curSlug), targetSlug) as RelativeURL } const outgoing: Set = new Set() visit(tree, "element", (node, _index, _parent) => { // rewrite all links if ( node.tagName === "a" && node.properties && typeof node.properties.href === "string" ) { let dest = node.properties.href as RelativeURL node.properties.className ??= [] node.properties.className.push(isAbsoluteUrl(dest) ? "external" : "internal") // don't process external links or intra-document anchors if (!(isAbsoluteUrl(dest) || dest.startsWith("#"))) { dest = node.properties.href = transformLink(dest) const canonicalDest = path.posix.normalize(joinSegments(curSlug, dest)) const [destCanonical, _destAnchor] = splitAnchor(canonicalDest) outgoing.add(destCanonical as CanonicalSlug) } // rewrite link internals if prettylinks is on if ( opts.prettyLinks && node.children.length === 1 && node.children[0].type === "text" ) { node.children[0].value = path.basename(node.children[0].value) } } // transform all other resources that may use links if ( ["img", "video", "audio", "iframe"].includes(node.tagName) && node.properties && typeof node.properties.src === "string" ) { if (!isAbsoluteUrl(node.properties.src)) { const ext = path.extname(node.properties.src) node.properties.src = transformLink(joinSegments("assets", node.properties.src)) + ext } } }) file.data.links = [...outgoing] } }, ] }, } } declare module "vfile" { interface DataMap { links: CanonicalSlug[] } }