From 9c8fec06d2b58e4e3bbe280ddc665a99fcc4878c Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Sun, 09 Mar 2025 22:33:15 +0000
Subject: [PATCH] feat: support non-singleton search

---
 quartz/components/scripts/util.ts |   21 +++++++++++++++++++++
 1 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/quartz/components/scripts/util.ts b/quartz/components/scripts/util.ts
index 4ffff29..f717901 100644
--- a/quartz/components/scripts/util.ts
+++ b/quartz/components/scripts/util.ts
@@ -3,6 +3,7 @@
   function click(this: HTMLElement, e: HTMLElementEventMap["click"]) {
     if (e.target !== this) return
     e.preventDefault()
+    e.stopPropagation()
     cb()
   }
 
@@ -23,3 +24,23 @@
     node.removeChild(node.firstChild)
   }
 }
+
+// AliasRedirect emits HTML redirects which also have the link[rel="canonical"]
+// containing the URL it's redirecting to.
+// Extracting it here with regex is _probably_ faster than parsing the entire HTML
+// with a DOMParser effectively twice (here and later in the SPA code), even if
+// way less robust - we only care about our own generated redirects after all.
+const canonicalRegex = /<link rel="canonical" href="([^"]*)">/
+
+export async function fetchCanonical(url: URL): Promise<Response> {
+  const res = await fetch(`${url}`)
+  if (!res.headers.get("content-type")?.startsWith("text/html")) {
+    return res
+  }
+
+  // reading the body can only be done once, so we need to clone the response
+  // to allow the caller to read it if it's was not a redirect
+  const text = await res.clone().text()
+  const [_, redirect] = text.match(canonicalRegex) ?? []
+  return redirect ? fetch(`${new URL(redirect, url)}`) : res
+}

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