a few changes on assets store and exists return

OpenSim/Data/MySQL/MySQLAssetData.cs

@@ -253,7 +253,7 @@ namespace OpenSim.Data.MySQL
         public override bool[] AssetsExist(UUID[] uuids)
         {
             if (uuids.Length == 0)
-                return new bool[0];
+                return [];
 
             HashSet<UUID> exist = new HashSet<UUID>();
 

OpenSim/Data/MySQL/MySQLXAssetData.cs

@@ -401,7 +401,7 @@ namespace OpenSim.Data.MySQL
         public bool[] AssetsExist(UUID[] uuids)
         {
             if (uuids.Length == 0)
-                return new bool[0];
+                return [];
 
             HashSet<UUID> exists = new HashSet<UUID>();
 

OpenSim/Data/PGSQL/PGSQLAssetData.cs

@@ -239,7 +239,7 @@ namespace OpenSim.Data.PGSQL
         public override bool[] AssetsExist(UUID[] uuids)
         {
             if (uuids.Length == 0)
-                return new bool[0];
+                return [];
 
             HashSet<UUID> exist = new HashSet<UUID>();
 

OpenSim/Data/SQLite/SQLiteAssetData.cs

@@ -147,7 +147,8 @@ namespace OpenSim.Data.SQLite
             }
 
             //m_log.Info("[ASSET DB]: Creating Asset " + asset.FullID.ToString());
-            if (AssetsExist(new[] { asset.FullID })[0])
+            bool[] assetsExist = AssetsExist([ asset.FullID ]);
+            if (assetsExist.Length > 0 && assetsExist[0])
             {
                 //LogAssetLoad(asset);
 
@@ -218,7 +219,7 @@ namespace OpenSim.Data.SQLite
         public override bool[] AssetsExist(UUID[] uuids)
         {
             if (uuids.Length == 0)
-                return new bool[0];
+                return [];
 
             HashSet<UUID> exist = new HashSet<UUID>();
 

OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/LocalAssetServiceConnector.cs

@@ -314,8 +314,7 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
         public string Store(AssetBase asset)
         {
-            if (m_Cache != null)
-                m_Cache.Cache(asset);
+            m_Cache?.Cache(asset);
 
             if (asset.Local)
             {

OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/RegionAssetConnectorModule.cs

@@ -512,7 +512,7 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
                 return m_localConnector.AssetsExist(ids);
             else if (m_HGConnector != null)
                 return m_HGConnector.AssetsExist(ids);
-            return null;
+            return [];
         }
 
         public string Store(AssetBase asset)
@@ -524,12 +524,13 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
                     return null;
 
                 id = StoreForeign(asset);
-                if (m_Cache != null)
-                {
-                    if (!string.IsNullOrEmpty(id) && !id.Equals(UUID.ZeroString))
-                        m_Cache.Cache(asset);
+                if (!string.IsNullOrEmpty(id) && !id.Equals(UUID.ZeroString))
+                { 
+                    m_Cache?.Cache(asset);
+                    return id;
                 }
-                return id;
+                else
+                    return string.Empty;
             }
 
             if (m_Cache != null)
@@ -541,10 +542,7 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
             id = StoreLocal(asset);
 
-            if (string.IsNullOrEmpty(id))
-                return string.Empty;
-
-            return id;
+            return string.IsNullOrEmpty(id) || id.Equals(UUID.ZeroString) ? string.Empty : id;
         }
 
         [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]

OpenSim/Region/OptionalModules/Avatar/Appearance/AppearanceInfoModule.cs

@@ -451,7 +451,7 @@ namespace OpenSim.Region.OptionalModules.Avatar.Appearance
                                             assetStrings[k], existChecks[k] ? "yes" : "no");
 
                                     sb.Append(cdt.ToString());
-                                    sb.Append("\n");
+                                    sb.Append('\n');
                                 }
                             }
                             else

OpenSim/Services/AssetService/AssetService.cs

@@ -168,15 +168,13 @@ namespace OpenSim.Services.AssetService
 
         public virtual string Store(AssetBase asset)
         {
-            bool exists = m_Database.AssetsExist(new[] { asset.FullID })[0];
-            if (!exists)
+            bool[] assetsexist = m_Database.AssetsExist([ asset.FullID ] );
+            if (assetsexist.Length == 0 || !assetsexist[0])
             {
 //                m_log.DebugFormat(
 //                    "[ASSET SERVICE]: Storing asset {0} {1}, bytes {2}", asset.Name, asset.FullID, asset.Data.Length);
                if (!m_Database.StoreAsset(asset))
-                {
-                return UUID.Zero.ToString();
-                }
+                    return UUID.Zero.ToString();
             }
 //            else
 //            {

OpenSim/Services/AssetService/XAssetService.cs

@@ -187,9 +187,8 @@ namespace OpenSim.Services.AssetService
 
         public virtual string Store(AssetBase asset)
         {
-            bool exists = m_Database.AssetsExist(new[] { asset.FullID })[0];
-            if (!exists)
-            {
+            bool[] assetsexist = m_Database.AssetsExist([ asset.FullID ] );
+            if (assetsexist.Length == 0 || !assetsexist[0])            {
 //                m_log.DebugFormat(
 //                    "[XASSET SERVICE]: Storing asset {0} {1}, bytes {2}", asset.Name, asset.FullID, asset.Data.Length);
                 m_Database.StoreAsset(asset);