quartz-research-note/quartz/path.ts

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import path from 'path'
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import { slug as slugAnchor } from 'github-slugger'
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// Quartz Paths
// Things in boxes are not actual types but rather sources which these types can be acquired from
//
// ┌────────────┐
// ┌───────────┤ Browser ├────────────┐
// │ └────────────┘ │
// │ │
// ▼ ▼
// ┌────────┐ ┌─────────────┐
// ┌───────────────────┤ Window │ │ LinkElement │
// │ └────┬───┘ └──────┬──────┘
// │ │ │
// │ getClientSlug() │ .href │
// │ ▼ ▼
// │
// │ Client Slug Relative URL
// getCanonicalSlug() │ https://test.ca/note/abc#anchor?query=123 ../note/def#anchor
// │
// │ canonicalizeClient() │ ▲
// │ ▼ │
// │ │
// └───────────────► Canonical Slug │
// /note/abc │
// │
// ▲ │
// canonicalizeServer() │ │
// │
// HTML File Server Slug │
// /note/abc/index.html ◄───────────── /note/abc/index │
// │
// ▲ ┌────────┴────────┐
// slugifyFilePath() │ transformInternalLink() │ │
// │ │ │
// ┌─────────┴──────────┐ ┌─────┴─────┐ ┌────────┴──────┐
// │ File Path │ │ Wikilinks │ │ Markdown Link │
// │ /note/abc/index.md │ └───────────┘ └───────────────┘
// └────────────────────┘ ▲ ▲
// ▲ │ │
// │ ┌─────────┐ │ │
// └────────────┤ MD File ├─────┴─────────────────┘
// └─────────┘
/// Utility type to simulate nominal types in TypeScript
type SlugLike<T> = string & { __brand: T }
/** Client-side slug, usually obtained through `window.location` */
export type ClientSlug = SlugLike<"client">
export function isClientSlug(s: string): s is ClientSlug {
return /^https?:\/\/.+/.test(s)
}
/** Canonical slug, should be used whenever you need to refer to the location of a file/note.
* On the client, this is normally stored in `document.body.dataset.slug`
*/
export type CanonicalSlug = SlugLike<"canonical">
export function isCanonicalSlug(s: string): s is CanonicalSlug {
const validStart = s.startsWith("/")
const validEnding = s.length === 1 || (!s.endsWith("/") && !s.endsWith("/index"))
return !_containsForbiddenCharacters(s) && validStart && validEnding && !_hasFileExtension(s)
}
/** A relative link, can be found on `href`s but can also be constructed for
* client-side navigation (e.g. search and graph)
*/
export type RelativeURL = SlugLike<"relative">
export function isRelativeURL(s: string): s is RelativeURL {
const validStart = /^\.{1,2}/.test(s)
const validEnding = !s.endsWith("/") && !s.endsWith("/index")
return validStart && validEnding && !_hasFileExtension(s)
}
/** A server side slug. This is what Quartz uses to emit files so uses index suffixes */
export type ServerSlug = SlugLike<"server">
export function isServerSlug(s: string): s is ServerSlug {
// must start with forward slash
const validStart = s.startsWith("/")
const validEnding = !s.endsWith("/")
return validStart && validEnding && !_containsForbiddenCharacters(s) && !_hasFileExtension(s)
}
/** The real file path to a file on disk */
export type FilePath = SlugLike<"filepath">
export function isFilePath(s: string): s is FilePath {
return s.startsWith("/") && _hasFileExtension(s)
}
export function getClientSlug(window: Window): ClientSlug {
return window.location.href as ClientSlug
}
export function getCanonicalSlug(window: Window): CanonicalSlug {
return window.document.body.dataset.slug! as CanonicalSlug
}
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export function canonicalizeClient(slug: ClientSlug): CanonicalSlug {
const { pathname } = new URL(slug)
let fp = pathname
fp = fp.replace(new RegExp(path.extname(fp) + '$'), '')
return _canonicalize(fp) as CanonicalSlug
}
export function canonicalizeServer(slug: ServerSlug): CanonicalSlug {
let fp = slug as string
return _canonicalize(fp) as CanonicalSlug
}
export function slugifyFilePath(fp: FilePath): ServerSlug {
// strip file extension
const withoutFileExt = fp.replace(new RegExp(path.extname(fp) + '$'), '')
const slug = withoutFileExt
.split(path.sep) // fs can have diff interpretations of /
.map((segment) => segment.replace(/\s/g, '-')) // slugify all segments
.join('/') // always use / as sep
.replace(/\/$/, '') // remove trailing slash
return slug as ServerSlug
}
export function transformInternalLink(link: string): RelativeURL {
let [fplike, anchor] = link.split("#", 2)
let segments = fplike.split("/").filter(x => x.length > 0)
let prefix = segments.filter(_isRelativeSegment).join("/")
let fp = "/" + segments.filter(seg => !_isRelativeSegment(seg)).join("/")
fp = canonicalizeServer(slugifyFilePath(fp as FilePath))
if (fp.endsWith("index")) {
fp = fp.slice(0, -"index".length)
}
let joined = [_stripSlashes(prefix), _stripSlashes(fp)].filter(x => x !== "").join("/")
anchor = anchor === undefined ? "" : '#' + slugAnchor(anchor)
return _addRelativeToStart(joined) + anchor as RelativeURL
}
// resolve /a/b/c to ../../
export function pathToRoot(slug: CanonicalSlug): RelativeURL {
let rootPath = slug
.split('/')
.filter(x => x !== '')
.map(_ => '..')
.join('/')
return _addRelativeToStart(rootPath) as RelativeURL
}
export const QUARTZ = "quartz"
function _canonicalize(fp: string): string {
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if (fp.endsWith("index")) {
fp = fp.slice(0, -"index".length)
}
// remove trailing slash
if (fp.endsWith("/")) {
fp = fp.slice(0, -1)
}
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if (fp.length === 0) {
return "/" as CanonicalSlug
}
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return fp
}
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function _containsForbiddenCharacters(s: string): boolean {
return s.includes(" ") || s.includes("#") || s.includes("?")
}
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function _hasFileExtension(s: string): boolean {
return /\.[A-Za-z]+$/.test(s)
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}
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function _isRelativeSegment(s: string): boolean {
return /^\.{0,2}$/.test(s)
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}
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function _stripSlashes(s: string): string {
if (s.startsWith("/")) {
s = s.substring(1)
}
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if (s.endsWith("/")) {
s = s.slice(0, -1)
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}
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return s
}
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function _addRelativeToStart(s: string): string {
if (s === "") {
s = "."
}
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if (!s.startsWith(".")) {
s = "./" + s
}
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return s
}