docker files fixes from liaqat

src/Managing.Core/MiscExtensions.cs

@@ -0,0 +1,66 @@
+namespace Managing.Core
+{
+    public static class MiscExtensions
+    {
+        // Ex: collection.TakeLast(5);
+        //public static IEnumerable<T> TakeLast<T>(this IEnumerable<T> source, int N)
+        //{
+        //    return source.Skip(Math.Max(0, source.Count() - N));
+        //}
+
+        // foreach(IEnumerable<User> batch in users.Batch(1000))
+        public static IEnumerable<IEnumerable<T>> Batch<T>(
+            this IEnumerable<T> source, int size)
+        {
+            T[] bucket = null;
+            var count = 0;
+
+            foreach (var item in source)
+            {
+                if (bucket == null)
+                    bucket = new T[size];
+
+                bucket[count++] = item;
+
+                if (count != size)
+                    continue;
+
+                yield return bucket.Select(x => x);
+
+                bucket = null;
+                count = 0;
+            }
+
+            // Return the last bucket with all remaining elements
+            if (bucket != null && count > 0)
+            {
+                Array.Resize(ref bucket, count);
+                yield return bucket.Select(x => x);
+            }
+        }
+
+        public static void AddItem<T>(this List<T> list, T item)
+        {
+            if (!list.Contains(item))
+            {
+                list.Add(item);
+            }
+        }
+
+        public static T ParseEnum<T>(string value)
+        {
+            return (T)Enum.Parse(typeof(T), value, true);
+        }
+
+        public static string Base64Encode(string plainText)
+        {
+            var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
+            return System.Convert.ToBase64String(plainTextBytes);
+        }
+        public static string Base64Decode(string base64EncodedData)
+        {
+            var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData);
+            return System.Text.Encoding.UTF8.GetString(base64EncodedBytes);
+        }
+    }
+}