Generic methods for working with K8S api

Author: macsux

src/KubernetesClient/DryRun.cs

@@ -0,0 +1,9 @@
+using System.Runtime.Serialization;
+
+namespace k8s
+{
+    public enum DryRun
+    {
+        All
+    }
+}

src/KubernetesClient/Extensions.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections;
+using System.Reflection;
+using System.Text.RegularExpressions;
+using k8s.Models;
+
+namespace k8s
+{
+    public static class Extensions
+    {
+        public static KubernetesEntityAttribute GetKubernetesTypeMetadata<T>(this T obj) where T : IKubernetesObject
+        {
+            return obj.GetType().GetKubernetesTypeMetadata();
+        }
+
+        public static KubernetesEntityAttribute GetKubernetesTypeMetadata(this Type currentType)
+        {
+            var attr = currentType.GetCustomAttribute<KubernetesEntityAttribute>();
+            if (attr == null)
+            {
+                throw new InvalidOperationException($"Custom resource must have {nameof(KubernetesEntityAttribute)} applied to it");
+            }
+
+            return attr;
+        }
+
+        public static T Initialize<T>(this T obj) where T : IKubernetesObject
+        {
+            var metadata = obj.GetKubernetesTypeMetadata();
+
+            obj.ApiVersion = !string.IsNullOrEmpty(metadata.Group) ? $"{metadata.Group}/{metadata.ApiVersion}" : metadata.ApiVersion;
+            obj.Kind = metadata.Kind ?? obj.GetType().Name;
+            if (obj is IMetadata<V1ObjectMeta> withMetadata && withMetadata.Metadata == null)
+            {
+                withMetadata.Metadata = new V1ObjectMeta();
+            }
+
+            return obj;
+        }
+
+        internal static bool IsValidKubernetesName(this string value)
+        {
+            return !Regex.IsMatch(value, "^[a-z0-9-]+$");
+        }
+
+        // Convert the string to camel case.
+        public static string ToCamelCase(this string value)
+        {
+            // If there are 0 or 1 characters, just return the string.
+            if (value == null || value.Length < 2)
+            {
+                return value;
+            }
+
+            // Split the string into words.
+            var words = value.Split(
+                new char[0],
+                StringSplitOptions.RemoveEmptyEntries);
+
+            // Combine the words.
+            var result = words[0].ToLower();
+            for (var i = 1; i < words.Length; i++)
+            {
+                result +=
+                    words[i].Substring(0, 1).ToUpper() +
+                    words[i].Substring(1);
+            }
+
+            return result;
+        }
+
+        public static bool In<T>(this T obj, params T[] values) => ((IList)values).Contains(obj);
+
+    }
+}