82 lines
2.6 KiB
TypeScript
82 lines
2.6 KiB
TypeScript
import { PluggableList } from "unified"
|
|
import { QuartzTransformerPlugin } from "../types"
|
|
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 ResolveLinks extends QuartzTransformerPlugin {
|
|
name = "LinkProcessing"
|
|
opts: Options
|
|
|
|
constructor(opts?: Options) {
|
|
super()
|
|
this.opts = { ...defaultOptions, ...opts }
|
|
}
|
|
|
|
markdownPlugins(): PluggableList {
|
|
return []
|
|
}
|
|
|
|
htmlPlugins(): PluggableList {
|
|
return [() => {
|
|
return (tree, file) => {
|
|
const curSlug = file.data.slug!
|
|
const transformLink = (target: string) => {
|
|
const targetSlug = slugify(decodeURI(target).trim())
|
|
if (this.opts.markdownLinkResolution === 'relative' && !path.isAbsolute(targetSlug)) {
|
|
return './' + relative(curSlug, targetSlug)
|
|
} else {
|
|
return './' + relativeToRoot(curSlug, targetSlug)
|
|
}
|
|
}
|
|
|
|
visit(tree, 'element', (node, _index, _parent) => {
|
|
// rewrite all links
|
|
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)
|
|
}
|
|
|
|
// rewrite link internals if prettylinks is on
|
|
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
|
|
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(path.join("assets", node.properties.src)) + ext
|
|
}
|
|
}
|
|
})
|
|
}
|
|
}]
|
|
}
|
|
}
|