add all

Packages/com.tivadar.best.http/Runtime/Shared/Streams/PeekableContentProviderStream.cs

@@ -0,0 +1,50 @@
+using Best.HTTP.Shared.PlatformSupport.Network.Tcp;
+
+namespace Best.HTTP.Shared.Streams
+{
+    /// <summary>
+    /// A PeekableStream implementation that also implements the <see cref="IPeekableContentProvider"/> interface too.
+    /// </summary>
+    public abstract class PeekableContentProviderStream : PeekableStream, IPeekableContentProvider
+    {
+        public PeekableContentProviderStream Peekable => this;
+
+        public IContentConsumer Consumer { get; private set; }
+
+        public void SetTwoWayBinding(IContentConsumer consumer)
+        {
+            this.Consumer = consumer;
+            this.Consumer?.SetBinding(this);
+        }
+
+        /// <summary>
+        /// This will set Consumer to null.
+        /// </summary>
+        public void Unbind()
+        {
+            this.Consumer?.UnsetBinding();
+            this.Consumer = null;
+        }
+
+        /// <summary>
+        /// Set Consumer to null if the current one is the one passed in the parameter. 
+        /// </summary>
+        public void UnbindIf(IContentConsumer consumer)
+        {
+            if (consumer == null || consumer == this.Consumer)
+            {
+                this.Consumer?.UnsetBinding();
+                this.Consumer = null;
+            }
+        }
+
+        public void SwitchIf(IContentConsumer from, IContentConsumer to)
+        {
+            if (from == null || from == this.Consumer)
+            {
+                this.Consumer?.UnsetBinding();
+                SetTwoWayBinding(to);
+            }
+        }
+    }
+}