From 3a81d93e689f69833847e4fe656a463c86c6767d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B8ren=20Kottal?= <snielsen43@gmail.com>
Date: Fri, 15 Mar 2024 12:25:09 +0100
Subject: [PATCH] Allows searching using an empty string as the search term

---
 CHANGELOG.md                                  |  3 +
 .../Services/SearchService.cs                 | 75 ++++++++++---------
 2 files changed, 42 insertions(+), 36 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e70f91b..fa6c5b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 4.0.2
+- Allows searching using an empty string as the search term
+
 ## 4.0.1
 - Prevents HTTPPageRenderer trying to fetch page if its URL is invalid (eg. "#")
 
diff --git a/src/Our.Umbraco.FullTextSearch/Services/SearchService.cs b/src/Our.Umbraco.FullTextSearch/Services/SearchService.cs
index d542557..5202fd6 100644
--- a/src/Our.Umbraco.FullTextSearch/Services/SearchService.cs
+++ b/src/Our.Umbraco.FullTextSearch/Services/SearchService.cs
@@ -85,45 +85,48 @@ private ISearchResults GetResults()
         {
             var query = new StringBuilder();
 
-            query.Append("(");
-
-            switch (_search.SearchType)
+            if (_search.SearchTerm.IsNullOrWhiteSpace() == false)
             {
-                case SearchType.MultiRelevance:
-                case SearchType.MultiAnd:
+                query.Append("(");
 
-                    // We formulate the query differently depending on the input.
-                    if (_search.SearchTerm.Contains('"'))
-                    {
-                        // If the user has entered double quotes we don't bother
-                        // searching for the full string
-                        query.Append(QueryAllPropertiesOr(_search.SearchTermSplit, 1));
-                    }
-                    else if (!_search.SearchTerm.Contains('"') && !_search.SearchTerm.Contains(' '))
-                    {
-                        // if there's no spaces or quotes we don't need to get the quoted term and boost it
-                        query.Append(QueryAllPropertiesOr(_search.SearchTermSplit, 1));
-                    }
-                    else
-                    {
-                        // otherwise we search first for the entire query in quotes,
-                        // then for each term in the query OR'd together.
-                        query.Append($"({QueryAllPropertiesOr(_search.SearchTermQuoted, 2)} OR {QueryAllPropertiesOr(_search.SearchTermSplit, 1)})");
-                    }
-
-                    break;
-
-                case SearchType.SimpleOr:
-
-                    query.Append(QueryAllProperties(_search.SearchTermSplit, 1.0, "OR", true));
-                    break;
-
-                case SearchType.AsEntered:
-
-                    query.Append(QueryAllPropertiesAnd(_search.SearchTermSplit, 1.0));
-                    break;
+                switch (_search.SearchType)
+                {
+                    case SearchType.MultiRelevance:
+                    case SearchType.MultiAnd:
+
+                        // We formulate the query differently depending on the input.
+                        if (_search.SearchTerm.Contains('"'))
+                        {
+                            // If the user has entered double quotes we don't bother
+                            // searching for the full string
+                            query.Append(QueryAllPropertiesOr(_search.SearchTermSplit, 1));
+                        }
+                        else if (!_search.SearchTerm.Contains('"') && !_search.SearchTerm.Contains(' '))
+                        {
+                            // if there's no spaces or quotes we don't need to get the quoted term and boost it
+                            query.Append(QueryAllPropertiesOr(_search.SearchTermSplit, 1));
+                        }
+                        else
+                        {
+                            // otherwise we search first for the entire query in quotes,
+                            // then for each term in the query OR'd together.
+                            query.Append($"({QueryAllPropertiesOr(_search.SearchTermQuoted, 2)} OR {QueryAllPropertiesOr(_search.SearchTermSplit, 1)})");
+                        }
+
+                        break;
+
+                    case SearchType.SimpleOr:
+
+                        query.Append(QueryAllProperties(_search.SearchTermSplit, 1.0, "OR", true));
+                        break;
+
+                    case SearchType.AsEntered:
+
+                        query.Append(QueryAllPropertiesAnd(_search.SearchTermSplit, 1.0));
+                        break;
+                }
+                query.Append(")");
             }
-            query.Append(")");
 
             if (_search.RootNodeIds.Any())
             {