From 7fdb6a3a076bd3ffc0b8a89905363ef76341f581 Mon Sep 17 00:00:00 2001
From: Xin <xin@imfing.com>
Date: Sun, 30 Mar 2025 21:52:41 +0100
Subject: [PATCH] chore: upgrade flexsearch to 0.8 (#652)

* chore: upgrade flexsearch to 0.8.x

- use cdn to download flexsearch js bundle

* chore: remove flexsearch.bundle.min.js
---
 assets/js/flexsearch.js                       | 17 ++------
 .../lib/flexsearch/flexsearch.bundle.min.js   | 39 -------------------
 layouts/partials/scripts/search.html          | 14 ++++++-
 3 files changed, 16 insertions(+), 54 deletions(-)
 delete mode 100644 assets/lib/flexsearch/flexsearch.bundle.min.js

diff --git a/assets/js/flexsearch.js b/assets/js/flexsearch.js
index 0cd84e2..a6ba7bf 100644
--- a/assets/js/flexsearch.js
+++ b/assets/js/flexsearch.js
@@ -196,18 +196,8 @@ document.addEventListener("DOMContentLoaded", function () {
   async function preloadIndex() {
     const tokenize = '{{- site.Params.search.flexsearch.tokenize | default  "forward" -}}';
 
-    const isCJK = () => {
-      const lang = document.documentElement.lang || "en";
-      return lang.startsWith("zh") || lang.startsWith("ja") || lang.startsWith("ko");
-    }
-
-    const encodeCJK = (str) => str.replace(/[\x00-\x7F]/g, "").split("");
-    const encodeDefault = (str) => (""+str).toLocaleLowerCase().split(/[\p{Z}\p{S}\p{P}\p{C}]+/u);
-    const encodeFunction = isCJK() ? encodeCJK : encodeDefault;
-
     window.pageIndex = new FlexSearch.Document({
       tokenize,
-      encode: encodeFunction,
       cache: 100,
       document: {
         id: 'id',
@@ -218,13 +208,14 @@ document.addEventListener("DOMContentLoaded", function () {
 
     window.sectionIndex = new FlexSearch.Document({
       tokenize,
-      encode: encodeFunction,
       cache: 100,
       document: {
         id: 'id',
         store: ['title', 'content', 'url', 'display', 'crumb'],
         index: "content",
-        tag: 'pageId'
+        tag: [{
+          field: "pageId"
+        }]
       }
     });
 
@@ -328,7 +319,7 @@ document.addEventListener("DOMContentLoaded", function () {
       pageTitleMatches[i] = 0;
 
       // Show the top 5 results for each page
-      const sectionResults = window.sectionIndex.search(query, 5, { enrich: true, suggest: true, tag: `page_${result.id}` })[0]?.result || [];
+      const sectionResults = window.sectionIndex.search(query, 5, { enrich: true, suggest: true, tag: { 'pageId': `page_${result.id}` } })[0]?.result || [];
       let isFirstItemOfPage = true
       const occurred = {}
 
diff --git a/assets/lib/flexsearch/flexsearch.bundle.min.js b/assets/lib/flexsearch/flexsearch.bundle.min.js
deleted file mode 100644
index 4ebf76e..0000000
--- a/assets/lib/flexsearch/flexsearch.bundle.min.js
+++ /dev/null
@@ -1,39 +0,0 @@
-/**
- * Skipped minification because the original files appears to be already minified.
- * Original file: /npm/flexsearch@0.7.31/dist/flexsearch.bundle.js
- *
- * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
- */
-/**!
- * FlexSearch.js v0.7.31 (Bundle)
- * Copyright 2018-2022 Nextapps GmbH
- * Author: Thomas Wilkerling
- * Licence: Apache-2.0
- * https://github.com/nextapps-de/flexsearch
- */
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diff --git a/layouts/partials/scripts/search.html b/layouts/partials/scripts/search.html
index b71e890..15ec9a0 100644
--- a/layouts/partials/scripts/search.html
+++ b/layouts/partials/scripts/search.html
@@ -7,8 +7,18 @@
     {{- if hugo.IsProduction -}}
       {{- $jsSearch = $jsSearch | minify | fingerprint -}}
     {{- end -}}
-    {{- $flexSearchJS := resources.Get "lib/flexsearch/flexsearch.bundle.min.js" | fingerprint -}}
-    <script defer src="{{ $flexSearchJS.RelPermalink }}" integrity="{{ $flexSearchJS.Data.Integrity }}"></script>
+    {{- $flexSearchVersion := site.Params.search.flexsearch.version | default "0.8.143" -}}
+    {{- $flexSearchJsUrl := printf "https://cdn.jsdelivr.net/npm/flexsearch@%s/dist/flexsearch.bundle%s.js" $flexSearchVersion (cond hugo.IsProduction ".min" ".debug") -}}
+    {{ with try (resources.GetRemote $flexSearchJsUrl) -}}
+      {{ with .Err -}}
+        {{ errorf "Could not retrieve FlexSearch js file from %s. Reason: %s." $flexSearchJsUrl . -}}
+      {{ else with.Value -}}
+        {{ with resources.Copy (printf "js/flexsearch.js") . -}}
+          {{ $flexSearchJs := . | fingerprint -}}
+          <script defer src="{{ $flexSearchJs.RelPermalink }}" integrity="{{ $flexSearchJs.Data.Integrity }}" crossorigin="anonymous"></script>
+        {{ end -}}
+      {{ end -}}
+    {{ end -}}
     <script defer src="{{ $jsSearch.RelPermalink }}" integrity="{{ $jsSearch.Data.Integrity }}"></script>
   {{- else -}}
     {{- warnf `search type "%s" is not supported` $searchType -}}