From 16a83b9e0e658f1e354444b6f3922f372a6a195d Mon Sep 17 00:00:00 2001
From: John Niang <johnniang@fastmail.com>
Date: Tue, 7 Mar 2023 11:48:13 +0800
Subject: [PATCH] Improve the quality of full-text searching result (#3457)
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#### What type of PR is this?

/kind improvement
/area core

#### What this PR does / why we need it:

This PR uses QueryParser to build Query instead of FuzzyQuery to improve the searching result quality.

<img width="930" alt="image" src="https://user-images.githubusercontent.com/16865714/223012862-1decfde8-be81-48d1-a3a9-6601b5fd299a.png">

#### Which issue(s) this PR fixes:

Fixes https://github.com/halo-dev/halo/issues/3234

#### Does this PR introduce a user-facing change?

```release-note
优化搜索查询结果
```
---
 .../app/search/post/LucenePostSearchService.java     | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/main/java/run/halo/app/search/post/LucenePostSearchService.java b/src/main/java/run/halo/app/search/post/LucenePostSearchService.java
index eeb9b512a..423d77a8d 100644
--- a/src/main/java/run/halo/app/search/post/LucenePostSearchService.java
+++ b/src/main/java/run/halo/app/search/post/LucenePostSearchService.java
@@ -23,7 +23,8 @@ import org.apache.lucene.index.DirectoryReader;
 import org.apache.lucene.index.IndexWriter;
 import org.apache.lucene.index.IndexWriterConfig;
 import org.apache.lucene.index.Term;
-import org.apache.lucene.search.FuzzyQuery;
+import org.apache.lucene.queryparser.classic.ParseException;
+import org.apache.lucene.queryparser.classic.QueryParser;
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.Sort;
@@ -57,7 +58,7 @@ public class LucenePostSearchService implements PostSearchService, DisposableBea
 
     public LucenePostSearchService(HaloProperties haloProperties)
         throws IOException {
-        analyzer = new IKAnalyzer();
+        analyzer = new IKAnalyzer(true);
         var postIdxPath = haloProperties.getWorkDir().resolve("indices/posts");
         postIndexDir = FSDirectory.open(postIdxPath);
     }
@@ -79,7 +80,7 @@ public class LucenePostSearchService implements PostSearchService, DisposableBea
 
         var hits = new ArrayList<PostHit>(topDocs.scoreDocs.length);
         for (var scoreDoc : topDocs.scoreDocs) {
-            hits.add(convert(searcher.doc(scoreDoc.doc), highlighter));
+            hits.add(convert(searcher.storedFields().document(scoreDoc.doc), highlighter));
         }
 
         var result = new SearchResult<PostHit>();
@@ -132,12 +133,11 @@ public class LucenePostSearchService implements PostSearchService, DisposableBea
     }
 
 
-    private Query buildQuery(String keyword) {
-        keyword = stripToEmpty(keyword).toLowerCase();
+    private Query buildQuery(String keyword) throws ParseException {
         if (log.isDebugEnabled()) {
             log.debug("Trying to search for keyword: {}", keyword);
         }
-        return new FuzzyQuery(new Term("searchable", keyword));
+        return new QueryParser("searchable", analyzer).parse(keyword);
     }
 
     private Document convert(PostDoc post) {