add score bumping with query and do hashcode customized

Flow.Launcher/Storage/UserSelectedRecord.cs

@@ -1,23 +1,67 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
+using System.Linq;
 using System.Text.Json.Serialization;
+using Flow.Launcher.Infrastructure;
 using Flow.Launcher.Infrastructure.Storage;
 using Flow.Launcher.Plugin;
 
 namespace Flow.Launcher.Storage
 {
     public class UserSelectedRecord
     {
+        private const int HASH_MULTIPLIER = 31;
+        private const int HASH_INITIAL = 23;
+
         [JsonInclude]
-        public Dictionary<string, int> records { get; private set; }
+        public Dictionary<int, int> records { get; private set; }
 
         public UserSelectedRecord()
         {
-            records = new Dictionary<string, int>();
+            records = new Dictionary<int, int>();
+        }
+
+        private static int GenerateCustomHashCode(Query query, Result result)
+        {
+            int hashcode = HASH_INITIAL;
+
+            unchecked
+            {
+                // skip the empty space
+                // https://stackoverflow.com/a/5155015 31 prime and is 2^5 - 1 which allows fast
+                //    optimization without information lost when int overflow
+
+                for (int i = 0; i < query.ActionKeyword.Length; i++)
+                {
+                    char item = query.ActionKeyword[i];
+                    hashcode = hashcode * HASH_MULTIPLIER + item;
+                }
+
+                for (int i = 0; i < query.Search.Length; i++)
+                {
+                    char item = query.Search[i];
+                    hashcode = hashcode * HASH_MULTIPLIER + item;
+                }
+
+                for (int i = 0; i < result.Title.Length; i++)
+                {
+                    char item = result.Title[i];
+                    hashcode = hashcode * HASH_MULTIPLIER + item;
+                }
+
+                for (int i = 0; i < result.SubTitle.Length; i++)
+                {
+                    char item = result.SubTitle[i];
+                    hashcode = hashcode * HASH_MULTIPLIER + item;
+                }
+                return hashcode;
+
+            }
         }
 
         public void Add(Result result)
         {
-            var key = result.ToString();
+            var key = GenerateCustomHashCode(result.OriginQuery, result);
             if (records.ContainsKey(key))
             {
                 records[key]++;
@@ -31,7 +75,7 @@ public void Add(Result result)
 
         public int GetSelectedCount(Result result)
         {
-            if (records.TryGetValue(result.ToString(), out int value))
+            if (records.TryGetValue(GenerateCustomHashCode(result.OriginQuery, result), out int value))
             {
                 return value;
             }