feat: spec + repo

src/request.persistence/_builders/OrderedBuilderExtensions.cs

@@ -0,0 +1,80 @@
+// Copyright (c) The Geekeey Authors
+// SPDX-License-Identifier: EUPL-1.2
+
+using System.Linq.Expressions;
+
+namespace Geekeey.Request.Persistence;
+
+/// <summary>
+/// Provides extension methods for <see cref="OrderedSpecificationBuilder{T}"/>.
+/// </summary>
+public static class OrderedBuilderExtensions
+{
+	/// <summary>
+	/// Adds a ThenBy expression for secondary ordering.
+	/// </summary>
+	/// <param name="builder">The ordered builder.</param>
+	/// <param name="expression">The expression.</param>
+	/// <typeparam name="T">The entity type.</typeparam>
+	/// <returns>The ordered builder.</returns>
+	public static OrderedSpecificationBuilder<T> ThenBy<T>(this OrderedSpecificationBuilder<T> builder, Expression<Func<T, object?>> expression)
+	{
+		return ThenBy(builder, expression, condition: true);
+	}
+
+	/// <summary>
+	/// Adds a ThenBy expression when <paramref name="condition"/> is <see langword="true"/>.
+	/// </summary>
+	/// <param name="builder">The ordered builder.</param>
+	/// <param name="expression">The expression.</param>
+	/// <param name="condition">Whether to apply the ThenBy.</param>
+	/// <typeparam name="T">The entity type.</typeparam>
+	/// <returns>The ordered builder.</returns>
+	public static OrderedSpecificationBuilder<T> ThenBy<T>(this OrderedSpecificationBuilder<T> builder, Expression<Func<T, object?>> expression, bool condition)
+	{
+		if (condition && !builder.IsChainDiscarded)
+		{
+			builder.Builder.OrderExpressions.Add(new OrderExpressionInfo<T>(expression, OrderType.ThenBy));
+		}
+		else
+		{
+			builder.IsChainDiscarded = true;
+		}
+
+		return builder;
+	}
+
+	/// <summary>
+	/// Adds a ThenByDescending expression for secondary ordering.
+	/// </summary>
+	/// <param name="builder">The ordered builder.</param>
+	/// <param name="expression">The expression.</param>
+	/// <typeparam name="T">The entity type.</typeparam>
+	/// <returns>The ordered builder.</returns>
+	public static OrderedSpecificationBuilder<T> ThenByDescending<T>(this OrderedSpecificationBuilder<T> builder, Expression<Func<T, object?>> expression)
+	{
+		return ThenByDescending(builder, expression, condition: true);
+	}
+
+	/// <summary>
+	/// Adds a ThenByDescending expression when <paramref name="condition"/> is <see langword="true"/>.
+	/// </summary>
+	/// <param name="builder">The ordered builder.</param>
+	/// <param name="expression">The expression.</param>
+	/// <param name="condition">Whether to apply the ThenByDescending.</param>
+	/// <typeparam name="T">The entity type.</typeparam>
+	/// <returns>The ordered builder.</returns>
+	public static OrderedSpecificationBuilder<T> ThenByDescending<T>(this OrderedSpecificationBuilder<T> builder, Expression<Func<T, object?>> expression, bool condition)
+	{
+		if (condition && !builder.IsChainDiscarded)
+		{
+			builder.Builder.OrderExpressions.Add(new OrderExpressionInfo<T>(expression, OrderType.ThenByDescending));
+		}
+		else
+		{
+			builder.IsChainDiscarded = true;
+		}
+
+		return builder;
+	}
+}