import { FilePath, joinSegments, resolveRelative, simplifySlug } from "../../util/path"
import { QuartzEmitterPlugin } from "../types"
import { write } from "./helpers"
import DepGraph from "../../depgraph"
import { getAliasSlugs } from "../transformers/frontmatter"
export const AliasRedirects: QuartzEmitterPlugin = () => ({
name: "AliasRedirects",
async getDependencyGraph(ctx, content, _resources) {
const graph = new DepGraph<FilePath>()
const { argv } = ctx
for (const [_tree, file] of content) {
for (const slug of getAliasSlugs(file.data.frontmatter?.aliases ?? [], argv, file)) {
graph.addEdge(file.data.filePath!, joinSegments(argv.output, slug + ".html") as FilePath)
}
}
return graph
},
async emit(ctx, content, _resources): Promise<FilePath[]> {
const fps: FilePath[] = []
for (const [_tree, file] of content) {
const ogSlug = simplifySlug(file.data.slug!)
for (const slug of file.data.aliases ?? []) {
const redirUrl = resolveRelative(slug, file.data.slug!)
const fp = await write({
ctx,
content: `
<!DOCTYPE html>
<html lang="en-us">
<head>
<title>${ogSlug}</title>
<link rel="canonical" href="${redirUrl}">
<meta name="robots" content="noindex">
<meta charset="utf-8">
<meta http-equiv="refresh" content="0; url=${redirUrl}">
</head>
</html>
`,
slug,
ext: ".html",
})
fps.push(fp)
}
}
return fps
},
})