From 6bcc66dff58204cd72bca474d442ab6af4f224be Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Mon, 4 May 2020 23:36:13 -0400
Subject: [PATCH] Adding NotFound error type.

---
 src/renderer/errors.rs   | 10 ++++++++++
 src/renderer/renderer.rs |  7 +++++++
 2 files changed, 17 insertions(+)

diff --git a/src/renderer/errors.rs b/src/renderer/errors.rs
index 663065c..8af8bb1 100644
--- a/src/renderer/errors.rs
+++ b/src/renderer/errors.rs
@@ -14,6 +14,10 @@ pub enum RenderError<'a> {
         segment: String,
         elem: &'a dyn ContextElement,
     },
+    NotFound {
+        path: &'a Vec<&'a str>,
+        breadcrumbs: Vec<&'a dyn ContextElement>,
+    },
     /// Attempting to render and unrenderable type (for example, an object without any filters)
     CantRender {
         elem: &'a dyn ContextElement,
@@ -36,6 +40,9 @@ impl fmt::Display for RenderError<'_> {
                 write!(f, "Failed to walk to {} from {:?}", segment, elem)
             }
             RenderError::CantRender { elem } => write!(f, "Cant render {:?}", elem),
+            RenderError::NotFound { path, breadcrumbs } => {
+                write!(f, "Could not find {:?} in {:?}", path, breadcrumbs)
+            }
         }
     }
 }
@@ -51,6 +58,9 @@ impl fmt::Debug for RenderError<'_> {
                 write!(f, "Failed to walk to {} from {:?}", segment, elem)
             }
             RenderError::CantRender { elem } => write!(f, "Cant render {:?}", elem),
+            RenderError::NotFound { path, breadcrumbs } => {
+                write!(f, "Could not find {:?} in {:?}", path, breadcrumbs)
+            }
         }
     }
 }
diff --git a/src/renderer/renderer.rs b/src/renderer/renderer.rs
index 3f368d3..c0a2a64 100644
--- a/src/renderer/renderer.rs
+++ b/src/renderer/renderer.rs
@@ -212,6 +212,13 @@ fn new_walk_path<'a>(
     breadcrumbs: Vec<&'a dyn ContextElement>,
     path: &Vec<&str>,
 ) -> Result<&'a dyn ContextElement, RenderError<'a>> {
+    for context in breadcrumbs.iter().rev() {
+        match walk_path_from_single_level(*context, path)? {
+            WalkResult::NoWalk => {}
+            WalkResult::PartialWalk => {}
+            WalkResult::FullyWalked(_) => {}
+        }
+    }
     Err(RenderError::Generic("temp".to_owned()))
 }