Search indexing improvements

server/AyaNova/biz/SearchTranslationWordBreakDataCache.cs

@@ -0,0 +1,74 @@
+using System.Threading.Tasks;
+using System.Threading;
+using System.Collections.Generic;
+using AyaNova.Util;
+using AyaNova.Models;
+namespace AyaNova.Biz
+{
+
+    public class SearchTranslationWordBreakDataCache
+    {
+        static SemaphoreSlim semaphoreSlim = new SemaphoreSlim(1, 1);
+        private static Dictionary<long, TranslationWordBreakingData> theCache = new Dictionary<long, TranslationWordBreakingData>();
+        public SearchTranslationWordBreakDataCache() { }
+        public static async Task<TranslationWordBreakingData> GetWordBreakData(long id)
+        {
+            await semaphoreSlim.WaitAsync();
+            try
+            {
+                if (!theCache.ContainsKey(1))
+                    theCache[id] = await GetTranslationSearchDataAsync(id);
+                return theCache[id];
+            }
+            finally
+            {
+                semaphoreSlim.Release();
+            }
+        }
+
+
+
+        internal static async Task<TranslationWordBreakingData> GetTranslationSearchDataAsync(long translationId)
+        {
+            TranslationWordBreakingData LSD = new TranslationWordBreakingData();
+            AyContext ct = ServiceProviderProvider.DBContext;
+            //Get stopwords
+            //Validate translation id, if not right then use default instead 
+            var Param = new List<string>();
+            translationId = await TranslationBiz.ReturnSpecifiedTranslationIdIfExistsOrDefaultTranslationId(translationId, ct);
+            Param.Add("StopWords1");
+            Param.Add("StopWords2");
+            Param.Add("StopWords3");
+            Param.Add("StopWords4");
+            Param.Add("StopWords5");
+            Param.Add("StopWords6");
+            Param.Add("StopWords7");
+            var Stops = await TranslationBiz.GetSubsetStaticAsync(Param, translationId);
+
+            foreach (KeyValuePair<string, string> kvp in Stops)
+            {
+                //Each stopwords translation key is a space delimited list of words and in the case of an empty local string (i.e. StopWords7) it's value is a single question mark
+                if (kvp.Value != "?")
+                {
+                    LSD.StopWords.AddRange(kvp.Value.Split(" "));
+                }
+            }
+
+            LSD.CJKIndex = await TranslationBiz.GetCJKIndexAsync(translationId, ct);
+            return LSD;
+        }
+
+        //Class to hold relevant translation data for breaking text
+        public class TranslationWordBreakingData
+        {
+            public bool CJKIndex { get; set; }
+            public List<string> StopWords { get; set; }
+            public TranslationWordBreakingData()
+            {
+                CJKIndex = false;
+                StopWords = new List<string>();
+            }
+        }
+
+    }//eoc
+}//eons