Events-MVC (example with htmx)

Events-MVC/Events.MVC/Util/Extensions/SieveModelExtensions.cs

@@ -0,0 +1,59 @@
+using Sieve.Models;
+
+namespace Events.MVC.Util.Extensions;
+
+public static class SieveModelExtensions
+{
+    public static void SetDefaultPagingAndSorting(this SieveModel sieveModel, int defaultPageSize, string defaultSort)
+    {
+        sieveModel.Page ??= 1;
+
+        if (sieveModel.Page < 1)
+        {
+            sieveModel.Page = 1;
+        }
+
+        if (sieveModel.PageSize is null || sieveModel.PageSize <= 0)
+        {
+            sieveModel.PageSize = defaultPageSize;
+        }
+
+        if (string.IsNullOrWhiteSpace(sieveModel.Sorts))
+        {
+            sieveModel.Sorts = defaultSort;
+        }
+    }
+
+    public static string ExtractFilterValue(this SieveModel sieveModel, string propertyName)
+    {
+        var filters = sieveModel.Filters?.Trim() ?? string.Empty;
+        return ExtractFilterValue(filters, propertyName);
+    }
+
+    public static string ExtractFilterValue(string filters, string propertyName)
+    {
+        return ExtractFilterValue(filters, propertyName, "@=*", "@=");
+    }
+
+    public static string ExtractFilterValue(string filters, string propertyName, params string[] operators)
+    {
+        if (string.IsNullOrWhiteSpace(filters))
+        {
+            return string.Empty;
+        }
+
+        foreach (var filter in filters.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
+        {
+            foreach (var filterOperator in operators)
+            {
+                var prefix = $"{propertyName}{filterOperator}";
+                if (filter.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
+                {
+                    return filter[prefix.Length..];
+                }
+            }
+        }
+
+        return string.Empty;
+    }
+}