mirror of
https://github.com/alrayyes/wiki.git
synced 2024-11-25 13:06:22 +00:00
45 lines
2.3 KiB
Markdown
45 lines
2.3 KiB
Markdown
---
|
|
title: Paths in Quartz
|
|
---
|
|
|
|
Paths are pretty complex to reason about because, especially for a static site generator, they can come from so many places.
|
|
|
|
The current browser URL? Technically a path. A full file path to a piece of content? Also a path. What about a slug for a piece of content? Yet another path.
|
|
|
|
It would be silly to type these all as `string` and call it a day as it's pretty common to accidentally mistake one type of path for another. Unfortunately, TypeScript does not have [nominal types](https://en.wikipedia.org/wiki/Nominal_type_system) for type aliases meaning even if you made custom types of a server-side slug or a client-slug slug, you can still accidentally assign one to another and TypeScript wouldn't catch it.
|
|
|
|
Luckily, we can mimic nominal typing using [brands](https://www.typescriptlang.org/play#example/nominal-typing).
|
|
|
|
```typescript
|
|
// instead of
|
|
type ClientSlug = string
|
|
|
|
// we do
|
|
type ClientSlug = string & { __brand: "client" }
|
|
|
|
// that way, the following will fail typechecking
|
|
const slug: ClientSlug = "some random slug"
|
|
```
|
|
|
|
While this prevents most typing mistakes _within_ our nominal typing system (e.g. mistaking a server slug for a client slug), it doesn't prevent us from _accidentally_ mistaking a string for a client slug when we forcibly cast it.
|
|
|
|
Thus, we still need to be careful when casting from a string to one of these nominal types in the 'entrypoints', illustrated with hexagon shapes in the diagram below.
|
|
|
|
The following diagram draws the relationships between all the path sources, nominal path types, and what functions in `quartz/path.ts` convert between them.
|
|
|
|
```mermaid
|
|
graph LR
|
|
Browser{{Browser}} --> Window{{Window}} & LinkElement{{Link Element}}
|
|
Window --"getCanonicalSlug()"--> Canonical[Canonical Slug]
|
|
Window --"getClientSlug()"--> Client[Client Slug]
|
|
LinkElement --".href"--> Relative[Relative URL]
|
|
Client --"canonicalizeClient()"--> Canonical
|
|
Canonical --"pathToRoot()"--> Relative
|
|
Canonical --"resolveRelative()" --> Relative
|
|
MD{{Markdown File}} --> FilePath{{File Path}} & Links[Markdown links]
|
|
Links --"transformLink()"--> Relative
|
|
FilePath --"slugifyFilePath()"--> Server[Server Slug]
|
|
Server --> HTML["HTML File"]
|
|
Server --"canonicalizeServer()"--> Canonical
|
|
style Canonical stroke-width:4px
|
|
```
|