From ae6a54d72fa3cedc9bf2e7134bfd3783a66c5c3f Mon Sep 17 00:00:00 2001
From: Quinn Slack <quinn@slack.org>
Date: Tue, 26 Dec 2023 01:08:21 -0600
Subject: [PATCH] wip

---
 .../docs/src/corpus/doc/contentExtractor.ts   | 21 +----------------
 .../src/corpus/source/web/webCorpusSource.ts  |  9 ++++----
 provider/docs/src/dom.ts                      | 23 +++++++++++++++++++
 3 files changed, 28 insertions(+), 25 deletions(-)
 create mode 100644 provider/docs/src/dom.ts

diff --git a/provider/docs/src/corpus/doc/contentExtractor.ts b/provider/docs/src/corpus/doc/contentExtractor.ts
index 7b09a52c..1b439099 100644
--- a/provider/docs/src/corpus/doc/contentExtractor.ts
+++ b/provider/docs/src/corpus/doc/contentExtractor.ts
@@ -1,4 +1,5 @@
 import { Readability } from '@mozilla/readability'
+import { parseDOM } from '../../dom'
 import { type Doc } from './doc'
 
 export interface Content {
@@ -28,26 +29,6 @@ export interface ContentExtractor {
 export const extractContentUsingMozillaReadability: ContentExtractor = {
     id: 'mozillaReadability',
     async extractContent(doc) {
-        type ParseDOM = (html: string, url: string | undefined) => Promise<Document>
-        const parseDOM: ParseDOM =
-            typeof DOMParser === 'undefined'
-                ? async (html, url) => {
-                      const { JSDOM } = await import('jsdom')
-                      return new JSDOM(html, { url }).window.document
-                  }
-                : (html, url) => {
-                      const document = new DOMParser().parseFromString(html, 'text/html')
-
-                      // Set base URL.
-                      if (url && document.head.querySelectorAll('base').length === 0) {
-                          const baseEl = document.createElement('base')
-                          baseEl.setAttribute('href', url)
-                          document.head.append(baseEl)
-                      }
-
-                      return Promise.resolve(document)
-                  }
-
         const info = new Readability(await parseDOM(doc.text, doc.url), {
             charThreshold: 500,
         }).parse()
diff --git a/provider/docs/src/corpus/source/web/webCorpusSource.ts b/provider/docs/src/corpus/source/web/webCorpusSource.ts
index c2d44c79..f238942c 100644
--- a/provider/docs/src/corpus/source/web/webCorpusSource.ts
+++ b/provider/docs/src/corpus/source/web/webCorpusSource.ts
@@ -1,4 +1,4 @@
-import { JSDOM } from 'jsdom'
+import { parseDOM } from '../../../dom'
 import { Logger } from '../../../logger'
 import { Doc } from '../../doc/doc'
 import { CorpusSource } from '../source'
@@ -57,10 +57,9 @@ export function createWebCorpusSource({ entryPage, prefix, logger }: WebCorpusSo
                 }
 
                 const html = await resp.text()
-                const dom = new JSDOM(html, { url: resp.url })
+                const dom = await parseDOM(html, resp.url)
 
-                const canonicalURLStr =
-                    dom.window.document.querySelector<HTMLLinkElement>("head > link[rel='canonical']")?.href
+                const canonicalURLStr = dom.querySelector<HTMLLinkElement>("head > link[rel='canonical']")?.href
                 if (canonicalURLStr && canonicalURLStr !== url.href) {
                     const canonicalURL = new URL(canonicalURLStr)
 
@@ -81,7 +80,7 @@ export function createWebCorpusSource({ entryPage, prefix, logger }: WebCorpusSo
                     url: url.toString(),
                 })
 
-                const pageLinks = dom.window.document.querySelectorAll<HTMLAnchorElement>('a[href]')
+                const pageLinks = dom.querySelectorAll<HTMLAnchorElement>('a[href]')
                 logger?.(`- Found ${pageLinks.length} links on page`)
                 for (const link of pageLinks) {
                     enqueueURL(new URL(link.href))
diff --git a/provider/docs/src/dom.ts b/provider/docs/src/dom.ts
new file mode 100644
index 00000000..95efcebb
--- /dev/null
+++ b/provider/docs/src/dom.ts
@@ -0,0 +1,23 @@
+export type ParseDOM = (html: string, url: string | undefined) => Promise<Document>
+
+/**
+ * Parse DOM (works in both Node and browser).
+ */
+export const parseDOM: ParseDOM =
+    typeof DOMParser === 'undefined'
+        ? async (html, url) => {
+              const { JSDOM } = await import('jsdom')
+              return new JSDOM(html, { url }).window.document
+          }
+        : (html, url) => {
+              const document = new DOMParser().parseFromString(html, 'text/html')
+
+              // Set base URL.
+              if (url && document.head.querySelectorAll('base').length === 0) {
+                  const baseEl = document.createElement('base')
+                  baseEl.setAttribute('href', url)
+                  document.head.append(baseEl)
+              }
+
+              return Promise.resolve(document)
+          }