Add project files.

Beam.Temporary.Cli/DataKeyExtensions.cs

@@ -0,0 +1,34 @@
+
+
+using aeqw89.DataKeys;
+
+namespace Beam.Temporary.Cli {
+    internal static class DataKeyExtensions {
+        public static DataKey WithNamespace(this DataKey dk, string @namespace) {
+            string[] names = @namespace.Split(':');
+            var agg = (string x, string y) => $"{x}:{y}";
+            for (int i = 0; i < names.Length; i++) {
+                string test = names.SkipLast(i).Aggregate(agg);
+                if (dk.Identifier.StartsWith(test)) {
+                    return new DataKey(dk.Identifier.Replace(test, @namespace));
+                }
+            }
+
+            return new DataKey(@namespace + ":" + dk.Identifier);
+        }
+
+        public static DataKey<T> WithNamespace<T>(this DataKey<T> dk, string @namespace) {
+            return ((DataKey)dk).WithNamespace(@namespace).As<T>();
+        }
+
+        public static DataKey<T> WithSuffix<T>(this DataKey<T> dk, string suffix) {
+            return new DataKey<T>(dk.Identifier + suffix);
+        }
+
+        public static DataKey ToAggregator(this DataKey dk)
+            => dk.WithNamespace("aeqw89:document:aggregators");
+        public static DataKey ToAuxiliary(this DataKey dk)
+            => dk.WithNamespace("aeqw89:document:auxillaries");
+        public static DataKey<T> As<T>(this DataKey dk) => new DataKey<T>(dk.Identifier);
+    }
+}