server/AyaNova/util/DbUtil.cs

@@ -4,6 +4,7 @@ using AyaNova.Models;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
+using System.Linq;
 
 namespace AyaNova.Util
 {
@@ -407,11 +408,34 @@ namespace AyaNova.Util
             if (await ct.Part.AnyAsync()) return false;
             if (await ct.Project.AnyAsync()) return false;
             if (await ct.PurchaseOrder.AnyAsync()) return false;
-            
+
             return true;
         }
 
 
+
+        ///////////////////////////////////////////
+        // Check if DB has evaluation user accounts 
+        // CALLED BY by login ping from licent via notify controller       
+        internal static async Task<bool> DBHasTrialUsersAsync(AyContext ct, ILogger _log)
+        {
+            _log.LogDebug("DB trial users presence check");
+            //There are 22 trial users (more but for internal use) in a trial database
+            if (await ct.User.LongCountAsync() < 22) return false;
+
+            //just check for a few for testing
+            if(await ct.User.AsNoTracking()
+            .Where(z => 
+            z.Login == "BizAdminFull" || 
+            z.Login == "DispatchFull" || 
+            z.Login == "InventoryFull" || 
+            z.Login == "Accounting" || 
+            z.Login == "TechFull"  
+            ).LongCountAsync() < 5) return false;
+
+            return true;
+        }
+
         ///////////////////////////////////////////
         // Ensure the db is not modified
         //