Initial commit

MeetTheTeacher/Model/Comparison/ComparerBase.cs

@@ -0,0 +1,24 @@
+namespace MeetTheTeacher.Model.Comparison;
+
+/// <summary>
+///     Base class for comparers which allow switching between ascending and descending mode
+/// </summary>
+public abstract class ComparerBase
+{
+    /// <summary>
+    ///     Creates a new instance of <see cref="ComparerBase" /> configured to sort in ascending or descending order
+    /// </summary>
+    /// <param name="ascending">Flag indicating if items should be sorted in ascending order; descending if false</param>
+    protected ComparerBase(bool ascending)
+    {
+        Ascending = ascending;
+    }
+
+    /// <summary>
+    ///     Gets if the comparer is configured to sort in ascending order; descending if false
+    /// </summary>
+    protected bool Ascending { get; }
+	
+	// TODO: consider moving the basic RefEquals code of CompareTo from the subclasses here
+	// maybe also rename this to SortOrderComparerBase or something and introduce another, common base class for all three?
+}