import { QuartzTransformerPlugin } from "../types" import { CanonicalSlug, RelativeURL, 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() { return [() => { return (tree, file) => { const curSlug = canonicalizeServer(file.data.slug!) const transformLink = (target: string): RelativeURL => { const targetSlug = transformInternalLink(target).slice("./".length) let [targetCanonical, targetAnchor] = splitAnchor(targetSlug) if (opts.markdownLinkResolution === 'relative') { return targetSlug as RelativeURL } else if (opts.markdownLinkResolution === 'shortest') { // https://forum.obsidian.md/t/settings-new-link-format-what-is-shortest-path-when-possible/6748/5 const allSlugs = file.data.allSlugs! // if the file name is unique, then it's just the filename const matchingFileNames = allSlugs.filter(slug => { const parts = slug.split(path.posix.sep) const fileName = parts.at(-1) return targetCanonical === fileName }) 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 = 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.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(path.join("assets", node.properties.src)) + ext } } }) file.data.links = [...outgoing] } }] } } } declare module 'vfile' { interface DataMap { links: CanonicalSlug[] } }