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TimetableDesigner.Core/TimetableSpanCollection.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TimetableDesigner.Core
+{
+    public class TimetableSpanCollection : ICollection<TimetableSpan>
+    {
+        #region FIELDS
+
+        private IList<TimetableSpan> _list;
+
+        #endregion
+
+
+
+        #region PROPERTIES
+
+        public int Count => _list.Count;
+        public bool IsReadOnly => _list.IsReadOnly;
+
+        #endregion
+
+
+
+        #region CONSTRUCTORS
+
+        public TimetableSpanCollection()
+        {
+            _list = new List<TimetableSpan>();
+        }
+
+        #endregion
+
+
+
+        #region PUBLIC METHODS
+
+        public void Add(TimetableSpan item)
+        {
+            int i = 0;
+            if (Count > 0)
+            {
+                bool done = false;
+                while (i < Count && !done)
+                {
+                    switch (item.CheckCollision(_list.ElementAt(i)))
+                    {
+                        case TimetableSpansCollision.CheckedSlotBefore: i++; break;
+                        case TimetableSpansCollision.CheckedSlotAfter: done ^= true; break;
+                        default: throw new ArgumentException("Slot collide with another slot");
+                    }
+                }
+            }
+            _list.Insert(i, item);
+        }
+
+        public void Clear() => _list.Clear();
+
+        public bool Contains(TimetableSpan item) => _list.Contains(item);
+
+        public void CopyTo(TimetableSpan[] array, int arrayIndex) => _list.CopyTo(array, arrayIndex);
+
+        public IEnumerator<TimetableSpan> GetEnumerator() => _list.GetEnumerator();
+
+        public bool Remove(TimetableSpan item) => _list.Remove(item);
+
+        IEnumerator IEnumerable.GetEnumerator() => ((IEnumerable)_list).GetEnumerator();
+
+        #endregion
+    }
+}