server/AyaNova/DataList/DataListSqlFilterOrderByBuilder.cs

@@ -0,0 +1,49 @@
+using System.Text;
+using Newtonsoft.Json.Linq;
+
+namespace AyaNova.DataList
+{
+    public static class DataListSqlFilterOrderByBuilder
+    {
+
+        // public static string DefaultGetManyOrderBy => "ORDER BY ID DESC";
+
+        // public static string DefaultPickListOrderBy => "ORDER BY NAME ASC";
+
+        public static string DataFilterToSQLOrderBy(AyaNova.Models.DataFilter dataFilter)
+        {
+
+            if (string.IsNullOrWhiteSpace(dataFilter.Sort))
+            {
+                return string.Empty;//used to be default order by
+            }
+
+            StringBuilder sb = new StringBuilder();
+
+            //iterate the datafilter and concatenate a sql query from it
+            var SortArray = JArray.Parse(dataFilter.Sort);
+            for (int i = 0; i < SortArray.Count; i++)
+            {
+
+                var SortItem = SortArray[i];
+                var fld = SortItem["fld"].Value<string>();
+                var dir = SortItem["dir"].Value<string>();
+                
+                sb.Append(" ");
+                sb.Append(fld);
+                sb.Append(" ");
+                sb.Append(dir == "+" ? "ASC" : "DESC");
+
+                if (i < SortArray.Count - 1)
+                {
+                    sb.Append(",");
+                }
+            }
+
+            return "ORDER BY" + sb.ToString();
+        }
+
+
+
+    }//eoc
+}//ens