import { PluggableList } from "unified" import { QuartzTransformerPlugin } from "../types" import { remarkWikiLink } from "@flowershow/remark-wiki-link" import { relative, relativeToRoot, slugify } 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' /** Strips folders from a link so that it looks nice */ prettyLinks: boolean } const defaultOptions: Options = { markdownLinkResolution: 'absolute', prettyLinks: true } export class LinkProcessing extends QuartzTransformerPlugin { name = "LinkProcessing" opts: Options constructor(opts?: Options) { super() this.opts = { ...defaultOptions, ...opts } } markdownPlugins(): PluggableList { return [[remarkWikiLink, { pathFormat: this.opts.markdownLinkResolution === "absolute" ? 'obsidian-absolute' : 'raw' }]] } htmlPlugins(): PluggableList { return [() => { return (tree, file) => { const curSlug = file.data.slug! const transformLink = (target: string) => { const targetSlug = slugify(decodeURI(target)) if (this.opts.markdownLinkResolution === 'relative' && !path.isAbsolute(targetSlug)) { return './' + relative(curSlug, targetSlug) } else { return './' + relativeToRoot(curSlug, targetSlug) } } // rewrite all links visit(tree, 'element', (node, _index, _parent) => { if ( node.tagName === 'a' && node.properties && typeof node.properties.href === 'string' ) { node.properties.className = isAbsoluteUrl(node.properties.href) ? "external" : "internal" // don't process external links or intra-document anchors if (!(isAbsoluteUrl(node.properties.href) || node.properties.href.startsWith("#"))) { node.properties.href = transformLink(node.properties.href) } if (this.opts.prettyLinks && node.children.length === 1 && node.children[0].type === 'text') { node.children[0].value = path.basename(node.children[0].value) } } }) // transform all images visit(tree, 'element', (node, _index, _parent) => { if ( node.tagName === 'img' && node.properties && typeof node.properties.src === 'string' ) { if (!isAbsoluteUrl(node.properties.src)) { const ext = path.extname(node.properties.src) node.properties.src = transformLink("/assets/" + node.properties.src) + ext } } }) } }] } }