From cef4e263b5ddb8308e8a9ae8270e71b8808a664f Mon Sep 17 00:00:00 2001
From: Harald Wolff <haraldwolff@skyoffice>
Date: Mon, 2 Sep 2019 09:59:09 +0200
Subject: [PATCH] Implement Resource.FallBackResource

---
 BaseResource.cs        |  9 ++++-----
 DirectoryResource.cs   |  2 +-
 Resource.cs            | 16 +++++++++++++++-
 ResourceApplication.cs | 12 ++++--------
 4 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/BaseResource.cs b/BaseResource.cs
index 29d14fb..808eb6b 100644
--- a/BaseResource.cs
+++ b/BaseResource.cs
@@ -40,7 +40,10 @@ namespace ln.http.resources
 
         public override Resource GetResource(string name)
         {
-            return this.resources[name];
+            if (this.resources.ContainsKey(name))
+                return this.resources[name];
+
+            return GetFallBackResource();
         }
 
         public override IEnumerable<Resource> GetResources()
@@ -54,10 +57,6 @@ namespace ln.http.resources
         }
 
 
-
-
-
-
         public virtual Resource CreateResource(string name)
         {
             throw new NotImplementedException();
diff --git a/DirectoryResource.cs b/DirectoryResource.cs
index 6b16dc4..0134cdd 100644
--- a/DirectoryResource.cs
+++ b/DirectoryResource.cs
@@ -126,7 +126,7 @@ namespace ln.http.resources
                 return resource;
             }
 
-            throw new KeyNotFoundException();
+            return GetFallBackResource();
         }
         
         public override IEnumerable<Resource> GetResources()
diff --git a/Resource.cs b/Resource.cs
index c7eb99a..b71b20c 100644
--- a/Resource.cs
+++ b/Resource.cs
@@ -10,6 +10,8 @@ namespace ln.http.resources
         public Resource Container { get; protected set; }
         public Resource DefaultResource { get; set; }
 
+        public Resource FallBackResource { get; set; }
+
         public virtual bool HandlesDispatching => false;
 
         public Resource(String name)
@@ -66,7 +68,8 @@ namespace ln.http.resources
             foreach (Resource r in GetResources())
                 if (r.Name.Equals(name))
                     return r;
-            throw new KeyNotFoundException();
+
+            return GetFallBackResource();
         }
         public abstract IEnumerable<Resource> GetResources();
 
@@ -75,6 +78,17 @@ namespace ln.http.resources
             return this.GetResources().Where((x) => resourceType.IsInstanceOfType(x));
         }
 
+        public virtual Resource GetFallBackResource()
+        {
+            if (FallBackResource != null)
+                return FallBackResource;
+
+            if (Container != null)
+                return Container.GetFallBackResource();
+
+            throw new KeyNotFoundException();
+        }
+
         public virtual HttpResponse GetResponse(HttpRequest httpRequest, Queue<string> pathStack)
         {
             return GetResponse(httpRequest);
diff --git a/ResourceApplication.cs b/ResourceApplication.cs
index ec15187..edded57 100644
--- a/ResourceApplication.cs
+++ b/ResourceApplication.cs
@@ -14,22 +14,18 @@ namespace ln.http.resources
 
         public override HttpResponse GetResponse(HttpRequest httpRequest)
         {
-            /* TODO: Implement Authentication here... */
-
-
             Resource currentResource = RootResource;
             Queue<String> pathStack = new Queue<String>(httpRequest.URI.AbsolutePath.Split(new String[] { "/" }, StringSplitOptions.RemoveEmptyEntries));
 
             while ((pathStack.Count > 0) && (!currentResource.HandlesDispatching))
             {
                 String next = pathStack.Dequeue();
-
                 if (!currentResource.Contains(next))
-                    throw new KeyNotFoundException();
-
+                {
+                    currentResource = currentResource.GetFallBackResource();
+                    break;
+                }
                 currentResource = currentResource.GetResource(next);
-
-                /* TODO: Implement Authorization hook here... */
             }
 
             return currentResource.GetResponse(httpRequest,pathStack);